Decomposition liquid generating device, cultivation device, decomposition liquid generating method, and decomposition liquid generating program

Abstract

Provided is a culture device that comprises: a decomposition tank that decomposes at least a part of organic matters contained in a fertilizer source to generate a decomposition liquid in which at least a part of the organic matters is mineralized; a supplying unit that supplies the decomposition liquid generated by the decomposition tank to a cultivation target; and a calculation unit that calculates decomposition conditions in the decomposition tank on the basis of a nutrient component profile indicating components to be contained in the decomposition liquid. The decomposition tank calculates the decomposition liquid on the basis of the decomposition conditions, and the supplying unit supplies the decomposition liquid generated in accordance with the decomposition conditions to the cultivation target.

Description

[Technical Field]

[0001] The present invention relates to a cultivation device, a cultivation method, and a cultivation program. [Background technology]

[0002] Patent Document 1 states that "the nutrient solution can be used for cultivation for a long period of time without disrupting the ionic balance of the seven main elements in the nutrient solution" (abstract). Patent Document 2 states that "plants can be cultivated while adding organic matter directly to the nutrient solution" (abstract). [Prior art document] [Patent documents] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-103855 [Patent Document 2] International Publication No. 2008 / 068829 General Disclosure

[0003] A first aspect of the present invention provides a cultivation device. The cultivation device includes a decomposition tank that decomposes at least a portion of the organic matter contained in a fertilizer source to produce a decomposed solution in which at least a portion of the organic matter is mineralized, an administration device that administers the decomposed solution produced by the decomposition tank to a cultivation target, and a calculation device that calculates decomposition conditions in the decomposition tank based on a nutrient component profile that indicates the components to be contained in the decomposed solution. The decomposition tank produces the decomposed solution based on the decomposition conditions. The administration device administers the decomposed solution produced based on the decomposition conditions to the cultivation target.

[0004] The decomposition tank may hold a liquid for generating a decomposition liquid. The cultivation apparatus may further include a fertilizer source input device that inputs a fertilizer source into the liquid based on the nutrient component profile. The decomposition tank may generate the decomposition liquid by decomposing at least a portion of the organic matter in the fertilizer source input into the liquid.

[0005] In any of the above-described cultivation devices, the calculation device may calculate, as a decomposition condition, a concentration of inorganic substances in the decomposition solution at a predetermined time based on the nutrient component profile. The fertilizer source adding device may add a fertilizer source to the liquid at the predetermined time so that the concentration of inorganic substances in the decomposition solution becomes the concentration of inorganic substances in the decomposition solution calculated by the calculation device.

[0006] In any of the cultivation devices described above, the computing device may calculate the decomposition conditions based on the nutrient component profile and the composition of the fertilizer source. The composition of the fertilizer source may be a composition ratio of multiple elements or trace elements among carbon, nitrogen, potassium, phosphorus, calcium, magnesium, and trace elements contained in the fertilizer source. The trace elements may include one or more of iron, manganese, copper, zinc, molybdenum, and boron.

[0007] In any of the cultivation devices described above, the calculation device may calculate the decomposition conditions based on the nutrient component profile and the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source.

[0008] In any of the above-described cultivation devices, the calculation device may calculate a mixing ratio of one fertilizer source to another fertilizer source based on the mass ratio of carbon atoms to nitrogen atoms in each of the multiple fertilizer sources, and calculate decomposition conditions based on the mixing ratio.

[0009] In any of the above cultivation devices, a relationship between at least one of a temperature and a decomposition time of the liquid and the amount of at least one inorganic substance produced may be determined in advance for each type or concentration of the plurality of fertilizer sources. The computing device may calculate decomposition conditions based on the relationship. The fertilizer source input device may input at least one of the plurality of fertilizer sources into the decomposition liquid based on the decomposition conditions. The relationship between at least one of a temperature and a decomposition time of the decomposition liquid and the amount of at least one inorganic substance produced may be stored in a storage device.

[0010] Any of the above-described cultivation devices may further include a temperature control device that controls the temperature of the liquid so that the concentration of inorganic substances in the decomposition liquid or the decomposition time of the liquid becomes a predetermined value.

[0011] In any of the cultivation devices described above, the calculation device may calculate the concentration of the liquid fertilizer source under the decomposition condition. Any of the cultivation devices described above may further include a concentration control device that controls the concentration of the liquid fertilizer source based on the concentration of the fertilizer source calculated by the calculation device.

[0012] In any of the cultivation devices described above, the calculation device may determine whether the concentration of the fertilizer source is equal to or greater than a first threshold and equal to or less than a second threshold. The concentration control device may control the concentration of the fertilizer source in the liquid when the calculation device determines that the concentration of the fertilizer source is equal to or greater than the first threshold and equal to or less than the second threshold.

[0013] If the concentration of the fertilizer source is less than a first threshold concentration, the fertilizer source dosing device may dosing the fertilizer source into the liquid in an amount such that the concentration of the fertilizer source becomes the first threshold concentration. If the concentration of the fertilizer source exceeds a second threshold concentration, the fertilizer source dosing device may dosing at least one of the fertilizer source and water into the liquid in an amount such that the concentration of the fertilizer source becomes the second threshold concentration.

[0014] In any of the above-described cultivation devices, the computing device may calculate decomposition conditions based on the concentration of organic matter in the liquid measured by the organic matter sensor. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition liquid becomes a predetermined concentration.

[0015] Any of the above-described cultivation devices may further include a temperature control device that controls the temperature of the liquid based on the concentration of organic matter measured by the organic matter sensor.

[0016] In any of the above-described cultivation devices, the calculation device may correct the nutrient component profile based on the concentration of organic matter measured by the organic matter sensor, and calculate decomposition conditions based on the corrected nutrient component profile.

[0017] In any of the above-described cultivation devices, the computing device may calculate decomposition conditions based on the pH of the liquid measured by the pH sensor. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition liquid becomes a predetermined concentration. The fertilizer source adding device may add at least one of the fertilizer source and water to the liquid based on the calculated decomposition conditions.

[0018] In any of the above cultivation devices, the calculation device may determine whether the pH of the liquid measured by the pH sensor is larger or smaller than a predetermined reference profile. The calculation device may calculate a difference between the pH of the liquid measured by the pH sensor at a certain time and the pH on the reference profile at the certain time. The temperature control device may control the temperature of the liquid based on the difference. The fertilizer source input device may add a fertilizer source to the liquid based on the difference. If the difference is positive, the fertilizer source input device may add a fertilizer source having a mass ratio of carbon atoms to nitrogen atoms smaller than the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source added to the liquid. If the difference is negative, the fertilizer source input device may add a fertilizer source having a mass ratio of carbon atoms to nitrogen atoms larger than the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source added to the liquid.

[0019] In any of the above-described cultivation devices, the computing device may calculate decomposition conditions based on the electrical conductivity of the liquid measured by the conductivity sensor. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition liquid becomes a predetermined concentration. The fertilizer source adding device may add at least one of the fertilizer source and water to the liquid based on the calculated decomposition conditions.

[0020] In any of the above cultivation devices, the computing device may determine whether the conductivity of the liquid measured by the conductivity sensor is larger or smaller than a predetermined reference profile. The computing device may calculate a difference between the conductivity of the liquid measured by the conductivity sensor at a certain time and the conductivity on the reference profile at the certain time. The temperature control device may control the temperature of the liquid based on the difference. The fertilizer source input device may add a fertilizer source to the liquid based on the difference. If the difference is positive, the fertilizer source input device may add a fertilizer source having a mass ratio of carbon atoms to nitrogen atoms smaller than the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source added to the liquid. If the difference is negative, the fertilizer source input device may add a fertilizer source having a mass ratio of carbon atoms to nitrogen atoms larger than the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source added to the liquid.

[0021] In any of the above-described cultivation devices, the computing device may calculate decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight on the cultivation target, which are acquired by an acquisition device that acquires at least one of the amount of solar radiation and the duration of sunlight. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition solution becomes a predetermined concentration. The fertilizer source adding device may add at least one of the fertilizer source and water to the liquid based on the calculated decomposition conditions.

[0022] In any of the above-described cultivation devices, the calculation device may correct at least one of the nutrient component profile and the decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device.

[0023] In any of the above-described cultivation devices, the cultivation target may be placed in a cultivation space. The computing device may calculate decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by a temperature and humidity sensor that measures at least one of the temperature and humidity of the cultivation space. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition liquid becomes a predetermined concentration. The fertilizer source adding device may add at least one of the fertilizer source and water to the liquid based on the calculated decomposition conditions.

[0024] In any of the above-described cultivation devices, the computing device may calculate decomposition conditions based on a carbon dioxide concentration in the cultivation space measured by a carbon dioxide sensor that measures the carbon dioxide concentration in the cultivation space. The decomposition conditions may be decomposition conditions under which a concentration of organic matter in the decomposition solution becomes a predetermined concentration. The fertilizer source adding device may add at least one of a fertilizer source and water to the liquid based on the calculated decomposition conditions.

[0025] In any of the above-mentioned cultivation devices, the calculation device may correct at least one of the nutrient component profile and the decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by the temperature and humidity sensor, and at least one of the carbon dioxide concentration of the cultivation space measured by the carbon dioxide concentration sensor.

[0026] In any of the above cultivation devices, the growth state of the cultivation object may be measured by a growth state sensor. The computing device may calculate decomposition conditions based on the growth state of the cultivation object measured by the growth state sensor. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition solution becomes a predetermined concentration. The administration device may administer at least one of a fertilizer source and water to the cultivation object based on the calculated decomposition conditions.

[0027] In any of the above-described cultivation devices, the nutrient components of the decomposition solution administered to the cultivation target may be measured by a nutrient component sensor. The computing device may calculate decomposition conditions based on the nutrient components of the decomposition solution measured by the nutrient component sensor. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition solution becomes a predetermined concentration. The administration device may administer at least one of a fertilizer source and water to the cultivation target based on the calculated decomposition conditions.

[0028] In any of the above-described cultivation devices, the calculation device may correct the decomposition conditions based on at least one of the growth state of the cultivation object and the nutritional components of the decomposition solution.

[0029] In any of the above-described cultivation devices, the calculation device may correct the nutrient component profile based on at least one of the growth state of the cultivation object and the nutrient components of the decomposition solution.

[0030] In any of the above cultivation devices, the calculation device may correct the decomposition conditions based on the corrected nutritional component profile.

[0031] Any of the above-described cultivation devices may further include an administration control device that controls the timing at which the administration device administers each of the decomposition solutions produced in the plurality of decomposition tanks to the cultivation target. The administration control device may control the administration device so that the timing at which one decomposition solution produced in one decomposition tank is administered to the cultivation target differs from the timing at which other decomposition solutions produced in other decomposition tanks are administered to the cultivation target, based on at least one of the growth state of the cultivation target measured by the growth state sensor and the nutrient components of the decomposition solutions measured by the nutrient component sensor.

[0032] Any of the above-described cultivation devices may further include a temperature control device that controls the temperature of the liquid. When the administration control device controls the administration device so as not to administer the decomposition liquid produced in one of the decomposition tanks to the cultivation target, the temperature control device may control the temperature of the liquid in the one of the decomposition tanks.

[0033] In any of the above-described cultivation devices, each of the plurality of decomposition tanks may be provided with a plurality of decomposition liquid sensors that measure components of the liquid. The computing device may calculate decomposition conditions based on the components of the liquid measured by each of the plurality of decomposition liquid sensors. The decomposition conditions may be decomposition conditions under which the concentration of organic matter in the decomposition liquid in each of the plurality of decomposition tanks becomes a predetermined concentration. The decomposition conditions in each of the plurality of decomposition tanks may be different from each other. The administration device may administer at least one of a fertilizer source and water to the cultivation target based on the calculated decomposition conditions.

[0034] In any of the above cultivation devices, the calculation device may calculate a nutritional component profile based on information about the cultivation object input by the input device.

[0035] In any of the above-described cultivation devices, the administration device may administer the decomposition solution to a cultivation tank in which the cultivation target is cultivated. At least a portion of the decomposition solution that has passed through the cultivation tank may be introduced into the decomposition tank.

[0036] In any of the above-described cultivation devices, the decomposition solution administered to the cultivation tank may be purified in a septic tank. At least a portion of the decomposition solution purified in the septic tank may be introduced into the decomposition tank. At least a portion of the decomposition solution purified in the septic tank may be in liquid form.

[0037] In a second aspect of the present invention, there is provided a cultivation device. The cultivation device includes a storage device storing a program and an arithmetic device having a processor. The program causes the processor to execute the following operations: a decomposition tank decomposes at least a portion of the organic matter contained in a fertilizer source to produce a decomposed solution in which at least a portion of the organic matter has been mineralized; an administration device administers the decomposed solution produced by the decomposition tank to a cultivation target; the arithmetic device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposed solution; the decomposition tank produces the decomposed solution based on the decomposition conditions; and the administration device administers the decomposed solution produced based on the decomposition conditions to the cultivation target.

[0038] A third aspect of the present invention provides a cultivation method. The cultivation method includes a decomposition step in which a decomposition tank decomposes at least a portion of the organic matter contained in a fertilizer source to produce a decomposition solution in which at least a portion of the organic matter is mineralized, an administration step in which an administration device administers the decomposition solution produced in the decomposition step to a cultivation target, and a decomposition condition calculation step in which an arithmetic device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposition solution. The decomposition step is a step in which the decomposition tank produces the decomposition solution based on the decomposition conditions. The administration step is a step in which the administration device administers the decomposition solution produced based on the decomposition conditions to a cultivation target. Cultivation method.

[0039] In a fourth aspect of the present invention, there is provided a cultivation program that causes a computer to function as a cultivation device.

[0040] The above summary of the invention does not list all of the features of the present invention, and subcombinations of these features may also be inventions. [Brief explanation of the drawings]

[0041] [Figure 1] 1 is a diagram showing an example of a cultivation apparatus 100 according to an embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing an example of a nutrient profile of the decomposition liquid 12. [Figure 3] FIG. 10 is a diagram showing an example of cultivation target information Ic. [Figure 4] FIG. 10 is a diagram showing an example of cultivation device information Ia. [Figure 5] FIG. 1 is a diagram showing an example of a nutritional component profile Pf. [Figure 6] FIG. 6 shows the nutritional component profile Pf shown in FIG. 5. [Figure 7] 10 is a diagram showing an example of the liquid volume AL of the decomposition liquid 12 for each period T. FIG. [Figure 8] FIG. 10 is a diagram showing an example of fertilizer source information If. [Figure 9] FIG. 10 is a diagram showing an example of decomposition conditions Cd. [Figure 10] FIG. 10 is a diagram showing another example of fertilizer source information If. [Figure 11] FIG. 10 is a diagram showing an example of fertilizer source inventory information Ifs. [Figure 12] 10 is a diagram showing an example of the liquid volume AL of the decomposition liquid 12 for each period T. FIG. [Figure 13] FIG. 10 is a diagram showing another example of the decomposition condition Cd. [Figure 14] FIG. 10 is a diagram showing another example of fertilizer source information If. [Figure 15] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 16]1 is a diagram showing an example of measurement of the oxidation-reduction potential of the decomposition liquid 12 by the ORP sensor 14. FIG. [Figure 17] FIG. 2 is a diagram showing an example of the relationship between the voltage of the decomposition liquid 12 measured by the ORP sensor 14 and time. [Figure 18] 1 is a graph showing an example of the relationship between the pH of the decomposition liquid 12 measured by the pH sensor 16 and time. [Figure 19] FIG. 10 is a diagram showing an example of the relationship between the pH of the decomposition liquid 12 measured by the pH sensor 16 and time, together with a reference profile Pfc1. [Figure 20] FIG. 10 is a diagram showing an example of the relationship between the conductivity σ of the decomposition liquid 12 measured by the conductivity sensor 17 and time, together with a reference profile Pfc2. [Figure 21] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 22] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 23] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 24] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 25] 10 is a timing chart showing an example of the timing of administering the decomposition liquids 12-1 to 12-3 to the cultivation object 92. [Figure 26] FIG. 2 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. [Figure 27] FIG. 27 is an enlarged view of the vicinity of the piping 48 and the administration device 40 in FIG. 26. [Figure 28] 1 is a flowchart illustrating an example of a cultivation method according to an embodiment of the present invention. [Figure 29] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 30] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 31]31 is a flowchart showing an example of details of the steps between the nutritional component profile calculation step S90 and the decomposition step S102 in FIG. 30. [Figure 32] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 33] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 34] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 35] 10 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. [Figure 36] FIG. 2 is a diagram showing an example of a computer 2200 in which the cultivation apparatus 100 according to an embodiment of the present invention may be embodied in whole or in part. DETAILED DESCRIPTION OF THE INVENTION

[0042] The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the scope of the invention as claimed. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

[0043] FIG. 1 is a diagram showing an example of a cultivation apparatus 100 according to an embodiment of the present invention. The cultivation apparatus 100 includes a decomposition tank 10, an administration device 40, and a computing device 50. The cultivation apparatus 100 may include a fertilizer source input device 20, a decomposition liquid storage tank 30, a septic tank 80, and a cultivation tank 90. ​​The cultivation tank 90 is a tank in which a cultivation object 92 is cultivated. The cultivation object 92 is, for example, a plant.

[0044] The decomposition tank 10 produces a decomposed solution 12 from the liquid 13. The liquid 13 contains a fertilizer source 22. As a result, the liquid 13 may contain organic matter 24. The fertilizer source feed device 20 may feed the fertilizer source 22 to the liquid 13. In this case, the fertilizer source feed device 20 may administer the fertilizer source 22 to the liquid 13 held in the decomposition tank 10, or may prepare the liquid 13 by feeding the fertilizer source 22 to the decomposition tank 10. Alternatively, the liquid 13 may be prepared by feeding the fertilizer source 22 to a container or the like separate from the decomposition tank 10. In this case, the liquid 13 may be sent to the decomposition tank 10 using a pipe or the like. The decomposition tank 10 may produce the decomposed solution 12 by decomposing at least a portion of the organic matter 24 contained in the liquid 13. In this example, the fertilizer source feed device 20 feeds the fertilizer source 22 to the decomposition tank 10. The fertilizer source 22 contains organic matter 24. The fertilizer source 22 is, for example, bonito solubles, cow manure, corn steep liquor, or the like.

[0045] The liquid 13 is a liquid before at least a portion of the organic matter 24 is mineralized. The liquid 13 may be a liquid after at least a portion of the organic matter 24 has been mineralized and before at least another portion of the organic matter 24 has been mineralized. The decomposition liquid 12 is a liquid after at least a portion of the organic matter 24 has been mineralized. The decomposition liquid 12 may contain organic matter 24 that has not been mineralized.

[0046] The liquid in which the organic matter 24 has been mineralized may refer to a liquid in which the organic matter 24 has been ammoniated, or may refer to a liquid in which the organic matter 24 has been nitrified (nitrified liquid). The decomposition tank 10 generates the decomposed liquid 12 by decomposing at least a portion of the organic matter 24 in the liquid 13. The organic matter 24 may be decomposed by microorganisms. The microorganisms may be contained in the cultivation tank 90 or in the fertilizer source 22. When the microorganisms are contained in the fertilizer source 22, the microorganisms may be added to the fertilizer source 22.

[0047] The cultivation apparatus 100 may include a plurality of decomposition tanks 10. In this example, the cultivation apparatus 100 includes three decomposition tanks 10 (decomposition tanks 10-1 to 10-3). In this example, the decomposition tanks 10-1 to 10-3 produce decomposition solutions 12-1 to 12-3, respectively. The cultivation apparatus 100 may include a plurality of cultivation tanks 90. In this example, the cultivation apparatus 100 includes four cultivation tanks 90 (cultivation tanks 90-1 to 90-4).

[0048] The decomposition liquid storage tank 30 stores the decomposition liquid 12 produced by the decomposition tank 10. In this example, the decomposition liquid storage tank 30 stores the decomposition liquid 12, which is a mixture of decomposition liquids 12-1 to 12-3. A fertilizer source 23 may be introduced into the decomposition liquid storage tank 30. The fertilizer source 23 is, for example, fermented limestone, organic potash, or the like. The fertilizer source 23 introduced into the decomposition liquid storage tank 30 may be mixed with the decomposition liquid 12 in the decomposition liquid storage tank 30.

[0049] The administration device 40 administers the decomposition liquid 12 produced in the decomposition tank 10 to the cultivation target 92. The decomposition liquid 12 contains nutrients for the growth of the cultivation target 92. The nutrients include N (nitrogen), H3PO4 (phosphate), K (potassium), etc. The cultivation target 92 may be placed in the cultivation tank 90, or in soil 91 (described later). When the cultivation target 92 is placed in the cultivation tank 90, the administration device 40 may administer the decomposition liquid 12 to the cultivation target 92 placed in the cultivation tank 90. ​​When the cultivation target 92 is placed in the soil 91 (described later), the administration device 40 may administer the decomposition liquid 12 to the cultivation target 92 placed in the soil 91 (described later), or may administer the decomposition liquid 12 to the soil 91 (described later). The decomposition tank 10 may further decompose the decomposition liquid 12 administered to the cultivation tank 90 by the administration device 40.

[0050] The administration device 40 may administer the decomposition liquid 12 stored in the decomposition liquid storage tank 30 to the cultivation target 92. The administration device 40 may administer any of the decomposition liquids 12-1 to 12-3 to the cultivation target 92 before being stored in the decomposition liquid storage tank 30.

[0051] In this example, the administration device 40 administers the decomposition liquid 12 to the cultivation tank 90-1 among the cultivation tanks 90-1 to 90-4. In this example, the decomposition liquid 12 administered to the cultivation tank 90-1 passes through the cultivation tanks 90 in the order of cultivation tank 90-2, cultivation tank 90-3, and cultivation tank 90-4. At least a portion of the decomposition liquid 12 that has passed through the cultivation tank 90 may be stored in the decomposition liquid storage tank 30. In this example, at least a portion of the decomposition liquid 12 that has passed through the cultivation tank 90-4 is stored in the decomposition liquid storage tank 30. In addition, at least a portion of the decomposition liquid that has passed through the cultivation tank 90-4 may be introduced into the decomposition tank 10. The decomposition tank 10 may further decompose the decomposition liquid 12 administered to the cultivation tank 90.

[0052] The decomposition liquid 12 administered to the cultivation tank 90 may be purified by a purification tank 80. Purifying the decomposition liquid 12 refers to reducing the concentration of nitrate nitrogen in the decomposition liquid 12. Purifying the decomposition liquid 12 may also refer to removing components such as NaCl (sodium chloride) remaining in the decomposition liquid 12. The concentration of nitrate nitrogen in the decomposition liquid 12 may be adjusted by the purification tank 80. The concentration of NaCl (sodium chloride) in the decomposition liquid 12 may be adjusted by the purification tank 80.

[0053] At least a portion of the decomposition liquid 12 that has passed through the cultivation tank 90 may be stored in the purification tank 80. In this example, at least a portion of the decomposition liquid 12 that has passed through the cultivation tank 90-4 is purified by the purification tank 80. At least a portion of the decomposition liquid 12 stored in the decomposition liquid storage tank 30 may be purified by the purification tank 80. At least a portion of the decomposition liquid 12 purified by the purification tank 80 may be introduced into the decomposition tank 10. The decomposition tank 10 may further decompose the decomposition liquid 12 purified by the purification tank 80. The decomposition liquid 12 may be circulated through the decomposition tank 10, the cultivation tank 90, and the purification tank 80. The decomposition liquid 12 may be discarded.

[0054] The cultivation device 100 may include a control device 110. In this example, the control device 110 has an arithmetic device 50. The arithmetic device 50 is, for example, a CPU (Central Processing Unit). The control device 110 may be a computer equipped with the CPU. The control device 110 may be a stationary computer or a portable computer such as a smartphone or tablet. The control device 110 may include an input device 112. The input device 112 is, for example, a keyboard, a mouse, a touch panel, etc. The control device 110 may be a computer equipped with the arithmetic device 50, the input device 112, a memory, an interface, etc.

[0055] The computing device 50 calculates the decomposition conditions in the decomposition tank 10. These decomposition conditions are referred to as decomposition conditions Cb. The decomposition conditions Cb are conditions under which the decomposition tank 10 produces a decomposition solution 12 in which a predetermined proportion of the organic matter 24 in the decomposition solution 12 has been mineralized.

[0056] FIG. 2 is a diagram showing an example of a nutrient component profile of the decomposition liquid 12. This nutrient component profile is referred to as a nutrient component profile Pf. The nutrient component profile Pf is a profile of inorganic substances in the decomposition liquid 12. The nutrient component profile Pf is a profile of the components of the decomposition liquid 12 (see FIG. 1), and may be the concentration in the decomposition liquid 12 of one or more inorganic components produced by the mineralization of the fertilizer source 22 (see FIG. 1). The nutrient component profile Pf may be the relationship between the inorganic component and time t. Time t may be the number of days the cultivation object 92 has been underway. The nutrient component profile Pf may include the change over time in the concentration of the inorganic component in the decomposition liquid 12.

[0057] In this example, the three inorganic components are designated as component N1, component N2, and component N3. The inorganic components resulting from the mineralization of the fertilizer source 22 (see FIG. 1) may include at least one of component N1, component N2, and component N3. Component N1 is, for example, NO3 - (nitrate ion). Component N2 is, for example, NO2 -(nitrite ion). Component N3 is, for example, NH4 + (ammonia ions) In Fig. 2, the changes in the concentrations of components N1, N2, and N3 in the decomposition liquid 12 (see Fig. 1) over time are shown by a solid line, a dashed line, and a dashed-dotted line, respectively.

[0058] In FIG. 2, the thick lines indicate the optimum concentrations of components N1, N2, and N3. In FIG. 2, the thin lines on either side of the thick lines indicate the minimum and maximum concentrations of components N1, N2, and N3. The range between the minimum and maximum values ​​may be the allowable range of inorganic components resulting from the mineralization of fertilizer source 22 (see FIG. 1). In FIG. 2, time te is the harvest date of the growing object, for example, grown by cultivation object 92 (see FIG. 1).

[0059] The nutrient component profile Pf may include a profile of the organic matter 24 (see FIG. 1). The nutrient component profile Pf may include a change in the concentration of the organic matter 24 in the decomposition liquid 12 (see FIG. 1) over time.

[0060] The nutrient component profile Pf indicates the components to be contained in the decomposition liquid 12 (see FIG. 1). The components to be contained in the decomposition liquid 12 may be concentrations of the components that are preferable for cultivating the object to be cultivated 92 (see FIG. 1), or may be a concentration ratio of multiple components. The nutrient component profile Pf may differ for each type of object to be cultivated 92, each season, or each region where the object to be cultivated 92 is cultivated. The type of object to be cultivated 92 is, for example, a type of plant.

[0061] The calculation device 50 (see FIG. 1) calculates decomposition conditions Cb in the decomposition tank 10 (see FIG. 1) based on the nutrient component profile Pf. The decomposition conditions Cb calculated by the calculation device 50 may include at least one of the amount and timing of administration of the decomposition liquid 12 (see FIG. 1) to the cultivation target 92 (see FIG. 1), the concentration of one or more inorganic substances in the decomposition liquid 12 (see FIG. 1), the amount and timing of purification of the decomposition liquid 12 purified in the purification tank 80 (see FIG. 1), the temperature of the decomposition liquid 12, and the number of decomposition tanks 10. The decomposition tank 10 produces the decomposition liquid 12 based on the decomposition conditions Cb calculated by the calculation device 50.

[0062] The dose of the decomposition liquid 12 may be the mass or volume of the decomposition liquid 12 administered to the cultivation target 92 per unit time. In the example shown in Fig. 1 , the decomposition liquid 12 in the dose administered to the cultivation target 92 may circulate through the cultivation tank 90, the septic tank 80, the decomposition tank 10, and the decomposition liquid storage tank 30. The dose administered to the cultivation target 92 is, for example, 80 L per day.

[0063] The purification amount of the decomposition liquid 12 may be the mass or volume of the decomposition liquid 12 purified per unit time. When microorganisms are added to the fertilizer source 22, the decomposition conditions Cb may include at least one of the amount and timing of adding the microorganisms to the fertilizer source 22 (see FIG. 1). The input amount of the microorganisms may be the mass or volume of the microorganisms added per unit time.

[0064] The decomposition liquid 12 (see FIG. 1) generated based on the decomposition conditions Cb is likely to contain components at concentrations that are favorable for the cultivation target 92 (see FIG. 1). The administration device 40 (see FIG. 1) administers the decomposition liquid 12 generated based on the decomposition conditions Cb to the cultivation target 92. As a result, the decomposition liquid 12 containing components at concentrations that are favorable for cultivating the cultivation target 92 is administered to the cultivation target 92.

[0065] Information on the cultivation object 92 (see FIG. 1) may be input via the input device 112. The information on the cultivation object 92 may be information on at least one of the type of the cultivation object 92, the amount of the cultivation object 92, the season in which the cultivation object 92 is cultivated, the region in which the cultivation object 92 is cultivated, and the polyphenols or vitamin C of the cultivation object 92. The amount of the cultivation object 92 may be the mass of the cultivation object 92. The arithmetic device 50 (see FIG. 1) may calculate a nutritional component profile Pf based on the information on the cultivation object 92 input via the input device 112. The nutritional component profile Pf may be input via the input device 112 by a user of the cultivation device 100.

[0066] The fertilizer source input device 20 (see FIG. 1) may input the fertilizer source 22 (see FIG. 1) into the liquid 13 (see FIG. 1) based on the nutrient component profile Pf. The decomposition conditions Cb may include at least one of the timing and amount of the fertilizer source 22 input by the fertilizer source input device 20 into the liquid 13. The input amount of the fertilizer source 22 may be the mass or volume of the fertilizer source input per unit time. The decomposition conditions Cb may further include at least one of the concentration of the fertilizer source 22 in the liquid 13, the decomposition time for decomposing the fertilizer source 22, the temperature of the liquid 13 at which the fertilizer source 22 is decomposed, the type and amount of microorganisms contained in the fertilizer source 22 or the cultivation tank 90, and the amount of aeration to the liquid 13.

[0067] The calculation device 50 (see FIG. 1) may calculate the concentration of inorganic substances in the decomposition solution 12 at a predetermined time as the decomposition condition Cb based on the nutrient profile Pf. The predetermined time is defined as time tp. Time tp may be a period between time zero and time te shown in FIG. 2. The inorganic substances in the decomposition solution 12 include NO3 - (nitrate ion), NO2 - (nitrite ion) and NH4 + (ammonium ion).

[0068] The fertilizer source dosing device 20 (see FIG. 1) may dosing the fertilizer source 22 into the liquid 13 so that the concentration of inorganic substances in the decomposition liquid 12 (see FIG. 1) becomes the concentration calculated by the calculation device 50 (see FIG. 1) at time tp. This makes it easier for the concentration of inorganic substances in the decomposition liquid 12 to become a concentration preferable for cultivating the cultivation target 92 at time tp. The decomposition liquid 12 may be administered to the cultivation target 92 at time tp.

[0069] FIG. 3 is a diagram showing an example of the cultivation object information Ic. The cultivation object information Ic is information related to the cultivation object 92. The cultivation object information Ic may include information related to the variety K of the cultivation object 92 and information related to the cultivation amount Am of the cultivation object 92. The variety K of the cultivation object 92 may refer to the type of vegetable, such as fruit vegetables, leafy vegetables, or root vegetables, or the type of fruit, such as pome fruits, citrus fruits, stone fruits, fruit vegetables, or nuts. The variety K of the cultivation object 92 may refer to a specific variety of vegetable, such as tomato, cabbage, or lettuce, or a specific variety of fruit, such as mandarin oranges or apples. The information related to the cultivation amount Am may be the number of plants, mass, or volume of the cultivation object 92. FIG. 3 shows an example where the variety K is tomato and the cultivation amount Am is 10 plants. The cultivation object information Ic may be stored in the storage device 52 (described below).

[0070] FIG. 4 is a diagram showing an example of the cultivation apparatus information Ia. The cultivation apparatus information Ia is information related to the cultivation apparatus 100. The cultivation apparatus information Ia may include information related to the capacity CC of the cultivation tank 90, information related to the capacity CD of the degradation tank 10, and information related to the number Nd of degradation tanks 10. The information related to the capacity CC of the cultivation tank 90 may refer to information related to the total capacity of the multiple cultivation tanks 90, or may refer to information related to the capacity of each cultivation tank 90 in the multiple cultivation tanks 90. The information related to the capacity CD of the degradation tank 10 may refer to information related to the total capacity of the multiple degradation tanks 10, or may refer to information related to the capacity of each degradation tank 10 in the multiple degradation tanks 10. The information related to the number Nd of degradation tanks 10 is information related to the maximum number of degradation tanks 10 included in the cultivation apparatus 100. FIG. 4 shows an example where the capacity CC is 500 L, the capacity CD is 500 L, and the number Nd is 3. The cultivation apparatus information Ia may be stored in a storage device 52 (described below).

[0071] 5 is a diagram showing an example of the nutrient component profile Pf. The calculation device 50 (see FIG. 1) may calculate the nutrient component profile Pf based on the cultivation object information Ic and the cultivation device information Ia. The calculation device 50 may calculate the nutrient component profile Pf based on the cultivation object information Ic and at least one of the capacity CC of the cultivation tank 90 and the capacity CD of the decomposition tank 10.

[0072] The nutrient component profile Pf may include information regarding the period T for cultivating the cultivation object 92, the start date Ds, the end date De, the number of days Dn, the inorganic component N, the concentration D of the inorganic component N, and the fertilization frequency F. The start date Ds is the day on which cultivation of the cultivation object 92 starts. The end date Ds is the day on which cultivation of the cultivation object 92 ends. FIG. 5 shows an example in which the period T1 is from the 1st to the 20th day, the period T2 is from the 21st to the 60th day, and the period T3 is from the 61st to the 120th day. The start date Ds and the end date De may be the time when cultivation of the cultivation object 92 starts and the time when cultivation ends, respectively. The number of days Dn may be the length from the time when cultivation starts to the time when cultivation ends.

[0073] Inorganic component N is the type of inorganic component N produced by mineralization of the fertilizer source 22. Figure 5 shows an example where the inorganic component N is component N1 in all of periods T1 to T3. Concentration D is the concentration of inorganic component N in the decomposition liquid 12. Figure 5 shows an example where the concentration D is 100 [mg / L] in period T1, 150 [mg / L] in period T2, and 200 [mg / L] in period T3. Fertilization frequency F is the number of fertilizations per unit time. In this example, fertilization frequency F is the number of fertilizations per day. Figure 5 shows an example where the fertilization frequency F is 1 [times / day] in all of periods T1 to T3.

[0074] The calculation device 50 (see FIG. 1) may calculate the period T, start date Ds, end date De, number of days Dn, inorganic component N, concentration D, and fertilization frequency F based on the cultivation object information Ic and the cultivation apparatus information Ia. The calculation device 50 (see FIG. 1) may calculate the period T, start date Ds, end date De, number of days Dn, concentration D, and fertilization frequency F for each type of inorganic component N based on the cultivation object information Ic and the cultivation apparatus information Ia. The nutrient component profile Pf shown in FIG. 5 may be stored in the storage device 52 (described below).

[0075] FIG. 6 is a diagram showing the nutrient profile Pf shown in FIG. 5. FIG. 6 is an example of the relationship between time t and component N1. As explained in FIG. 3, the thick line in FIG. 6 indicates the optimum value of the concentration of component N1, and the thin lines on either side of the thick line indicate the maximum and minimum values ​​of the concentration of component N1. The calculation device 50 (see FIG. 1) may calculate the optimum value as well as the maximum and minimum values. The calculation device 50 may similarly calculate the nutrient profile Pf for components N2 and N3. In FIG. 6, the concentrations D during periods T1 to T3 are indicated by C1 to C3, respectively. In FIG. 6, the end date De of period T1 is indicated by time td1, the end date De of period T2 is indicated by time td2, and the end date De of period T3 is indicated by time te.

[0076] FIG. 7 is a diagram showing an example of the liquid volume AL of the decomposition liquid 12 for each period T. The calculation device 50 (see FIG. 1) may calculate the liquid volume AL of the decomposition liquid 12 based on the nutrient component profile Pf. The liquid volume AL of the decomposition liquid 12 is the liquid volume of the decomposition liquid 12 that embodies the relationship between the time t and the concentration D of the inorganic component N shown in the nutrient component profile Pf. The liquid volume AL of the decomposition liquid 12 may be the liquid volume per day. The calculation device 50 may calculate the liquid volume AL of the decomposition liquid 12 by integrating the capacity CC and the fertilization frequency F. In the example of FIG. 7, the calculation device 50 calculates the liquid volume AL of the decomposition liquid 12 for periods T1 to T3 to be 500 [L / day]. The liquid volume AL of the decomposition liquid 12 for each period T may be stored in the storage device 52 (described later).

[0077] The calculation device 50 may calculate the liquid volume AL of the decomposition liquid 12 for each period T based on the nutrient component profile Pf. The calculation device 50 may calculate the liquid volume AL of the decomposition liquid 12 for each type of component N based on the nutrient component profile Pf. Figure 7 shows an example where the component N is N1.

[0078] FIG. 8 is a diagram showing an example of fertilizer source information If. The fertilizer source information If is information related to the fertilizer source 22 (see FIG. 1). The fertilizer source information If may include information related to the amount An of inorganic components N produced, information related to the temperature Tp at which the inorganic components N are produced, and information related to the decomposition time Td of organic matter 24 (see FIG. 1) contained in the fertilizer source 22. The information related to the amount An refers to information related to the amount of inorganic components N produced per unit amount of the fertilizer source 22. The information related to the temperature Tp refers to information related to the temperature at which the inorganic components N are produced from the fertilizer source 22. This temperature may be an optimal temperature for producing the inorganic components N from the fertilizer source 22. The information related to the decomposition time Td refers to information related to the time required to produce the amount An of inorganic components N. The numerical values ​​shown in FIG. 8 are examples of the amount An [mg / g], the temperature Tp [°C], and the decomposition time Td [h]. The fertilizer source information If may be stored in a storage device 52 (described below).

[0079] The fertilizer source information If may include information on the production amount An, information on the temperature Tp, and information on the decomposition time Td for each type of inorganic component N produced by mineralization of the fertilizer source 22. In this example, the fertilizer source information If includes information on the production amount An, information on the temperature Tp, and information on the decomposition time Td for each of the components N1 to N3.

[0080] The fertilizer source information If may include, for each type of fertilizer source 22, information on the production amount An, information on the temperature Tp, and information on the decomposition time Td. The relationship between at least one of the temperature Tp and the decomposition time Td of the liquid 13 and the production amount An of the at least one inorganic substance N may be predetermined for each type of fertilizer source 22. This relationship is referred to as relationship R1. In this example, the fertilizer source information If includes a relationship R1 between the temperature Tp and the decomposition time Td of the liquid 13 and the production amount An for each of two types of fertilizer sources 22. The relationship between the temperature Tp and the decomposition time Td of the liquid 13 and the production amount An of the at least one inorganic substance N may be predetermined for each concentration of the fertilizer source 22 in the liquid 13. This relationship is referred to as relationship R2.

[0081] The fertilizer source 22 named F1 and the fertilizer source 22 named F2 may be different fertilizer sources. Different fertilizer sources refer to fertilizer sources in which at least a portion of the organic matter contained in the fertilizer source 22 is different from each other. An example of different fertilizer sources is when the fertilizer source 22 named F1 is bonito solubles and the fertilizer source 22 named F2 is cow manure.

[0082] The term "different fertilizer sources 22" may refer to fertilizer sources 22 that contain the same organic matter 24 but have different compositions. The term "composition of fertilizer sources 22" refers to the composition ratio of multiple elements or trace elements selected from C (carbon), N (nitrogen), K (potassium), P (phosphorus), Ca (calcium), Mg (magnesium), and trace elements contained in fertilizer source 22. Trace elements refer to one or more of Fe (iron), Mn (manganese), Cu (copper), Zn (zinc), Mo (molybdenum), and B (boron). The term "fertilizer sources 22 that have different compositions" may refer to at least one type of element or trace element contained in fertilizer sources 22 being different, or may refer to the same elements or trace elements contained in fertilizer sources 22 but with different composition ratios of the elements or trace elements.

[0083] Different fertilizer sources 22 may refer to fertilizer sources with the same name F but different origins. For example, fertilizer source 22 with the name F1 is bonito soluble from origin A, and fertilizer source 22 with the name F2 is bonito soluble from origin B. Even if fertilizer sources 22 have the same name F, the compositions of fertilizer sources 22 may differ from each other if they are from different origins.

[0084] FIG. 9 is a diagram showing an example of the decomposition conditions Cd. The calculation device 50 (see FIG. 1) calculates the decomposition conditions Cd based on the nutrient component profile Pf (see FIGS. 2, 5, and 6). The decomposition conditions Cd may include information related to the name F of the fertilizer source 22, the concentration Df of the fertilizer source 22, the temperature Tq of the liquid 13, the decomposition time Td', and the number Nd' of decomposition tanks 10. The concentration Df refers to the concentration of the fertilizer source 22 at the time when the fertilizer source 22 is introduced into the decomposition tank 10. The time when the fertilizer source 22 is introduced refers to the time before decomposition of the fertilizer source 22 begins in the decomposition liquid 12. The concentration Df may refer to the concentration of the fertilizer source 22 in the liquid 13. The temperature Tq is the temperature of the liquid 13 for realizing the desired nutrient component profile Pf. The number Nd of the decomposition tanks 10 may refer to one or more of the decomposition tanks 10-1 to 10-3 (see FIG. 1). 9 are examples of concentration Df [g / L], temperature Tq [°C], decomposition time Td' [days], and number Nd'. The decomposition tank 10 may produce the decomposition solution 12 based on the decomposition conditions Cd shown in FIG.

[0085] FIG. 10 is a diagram showing another example of fertilizer source information If. The fertilizer source information If in FIG. 10 differs from the fertilizer source information If in FIG. 8 in that it further includes information related to the composition Cf of the fertilizer source 22. As described above, the composition Cf of the fertilizer source 22 refers to the composition ratio of multiple elements or trace elements among C (carbon), N (nitrogen), K (potassium), P (phosphorus), Ca (calcium), Mg (magnesium), and trace elements that constitute the fertilizer source 22. The trace elements refer to one or more of Fe (iron), Mn (manganese), Cu (copper), Zn (zinc), Mo (molybdenum), and B (boron). FIG. 10 shows an example in which the composition Cf is the mass ratio of C (carbon) atoms to N (nitrogen) atoms (mass of C (carbon) atoms / mass of N (nitrogen) atoms).

[0086] The amount An of inorganic component N, the temperature Tq of the decomposition liquid 12, and the decomposition time Td' may differ for each composition Cf of the fertilizer source 22. The fertilizer source information If shown in Fig. 10 is information indicating the relationship between the composition Cf and the amount An of inorganic component N, the temperature Tq, and the decomposition time Td' for each of the five fertilizer sources 22 (names F1 to F5).

[0087] One of the fertilizer sources 22 designated F1 to F5 may include a fertilizer source 22 that is a combination of multiple other fertilizer sources 22 designated F1 to F5. For example, if the fertilizer source 22 designated F1 is bonito soluble from production area A, the fertilizer source 22 designated F2 is bonito soluble from production area B, the fertilizer source 22 designated F3 is cow manure from production area C, and the fertilizer source 22 designated F4 is cow manure from production area D, the fertilizer source 22 designated F5 may be a fertilizer source 22 that combines the bonito soluble from production area A and the cow manure from production area C.

[0088] The calculation device 50 (see FIG. 1) may calculate the decomposition conditions Cd based on the nutrient component profile Pf and the composition Cf of the fertilizer source 22. This allows the calculation device 50 to calculate the decomposition conditions Cd that reflect the composition Cf of the fertilizer source 22.

[0089] The calculation device 50 (see FIG. 1) may calculate the decomposition condition Cd based on at least one of the relationship R1 (see FIG. 8) and the relationship R2. The fertilizer source input device 20 (see FIG. 1) may input at least one of the multiple fertilizer sources 22 into the decomposition liquid 12 based on the decomposition condition Cd.

[0090] The composition Cf may be the mass ratio of C (carbon) atoms to N (nitrogen) atoms (mass of C (carbon) atoms / mass of N (nitrogen) atoms) contained in the fertilizer source 22. The mass ratio of C (carbon) atoms to N (nitrogen) atoms is defined as the mass ratio Rm. The calculation device 50 (see FIG. 1) may calculate the decomposition condition Cd based on the nutrient component profile Pf and the mass ratio Rm.

[0091] The temperature control device 70 (see FIG. 3) may control the temperature of the liquid 13 so that the concentration of the inorganic substance (inorganic component N) in the decomposition liquid 12 becomes a predetermined concentration value. The larger the mass ratio Rm of the fertilizer source 22 (i.e., the higher the ratio of C (carbon) atoms), the more difficult it is to decompose the fertilizer source 22. The temperature control device 70 may increase the temperature of the liquid 13 when the concentration of the inorganic substance (inorganic component N) in the decomposition liquid 12 is lower than a predetermined concentration value. This may promote the production of the inorganic component N. The temperature control device 70 may decrease the temperature of the liquid 13 when the concentration of the inorganic substance (inorganic component N) in the decomposition liquid 12 is higher than a predetermined concentration value. This may suppress the production of the inorganic component N.

[0092] The temperature control device 70 (see FIG. 3) may control the temperature of the liquid 13 so that the decomposition time Td of the liquid 13 becomes a predetermined time value. The decomposition time Td of the liquid 13 refers to the time required to decompose at least a portion of the organic matter 24 contained in the liquid 13. If the decomposition time Td of the liquid 13 is shorter than the predetermined time value, the temperature control device 70 may lower the temperature of the liquid 13. This may suppress the generation of the inorganic component N. If the decomposition time Td of the liquid 13 is longer than the predetermined time value, the temperature control device 70 may raise the temperature of the liquid 13. This may promote the generation of the inorganic component N.

[0093] FIG. 11 is a diagram showing an example of fertilizer source inventory information Ifs. The fertilizer source inventory information Ifs is information related to the inventory of the fertilizer source 22 (see FIG. 1). The fertilizer source inventory information Ifs may include information related to the origin Pa and inventory amount As of the fertilizer source 22. The fertilizer source inventory information Ifs may include information related to the origin Pa and inventory amount As for each name F of the fertilizer source 22. The fertilizer source inventory information Ifs may be stored in a storage device 52 (described below).

[0094] Fig. 12 is a diagram showing an example of the liquid volume AL of the decomposition liquid 12 for each period T. Fig. 12 shows the example of Fig. 7 together with information related to the upper decomposition time limit Tu. The calculation device 50 (see Fig. 1) may calculate the upper decomposition time limit Tu based on the capacity CD of the decomposition tank 10 (see Fig. 4), the number Nd of the decomposition tanks 10 (see Fig. 4), and the liquid volume AL of the decomposition liquid 12. In the example of Fig. 12, the calculation device 50 calculates the upper decomposition time limit Tu for periods T1 to T3 to be 72 hours.

[0095] Fig. 13 is a diagram showing another example of the decomposition condition Cd. The calculation device 50 (see Fig. 1) may calculate the mixing ratio of the one fertilizer source 22 to the other fertilizer source 22 based on the mass ratio Rm. This mixing ratio is referred to as the mixing ratio Rx. The one fertilizer source 22 refers to, for example, any of the fertilizer sources named F1 to F5 shown in Fig. 10. The other fertilizer source 22 refers to, for example, any of the fertilizer sources named F1 to F5 shown in Fig. 10 that are different from the one fertilizer source 22.

[0096] The calculation device 50 (see FIG. 1) may calculate the mixing ratio Rx based on the mass ratio Rm and predetermined constraint conditions. The constraint conditions are referred to as constraint conditions Cx. The constraint conditions Cx refer to the specifications of the cultivation device 100 or the type of fertilizer source 22, which may be constraints in calculating the decomposition conditions Cd. The constraint conditions Cx are, for example, the decomposition time condition Tu (see FIG. 12), the inventory of the fertilizer source 22 (see FIG. 11), and a threshold value of the C / N ratio at which the fertilizer source 22 can be decomposed. The threshold value is referred to as threshold value Rth.

[0097] In the example of Figure 11, the C / N ratio of the fertilizer source 22 named F1 (e.g., bonito solubles from production area A) is Rc1, and the C / N ratio of the fertilizer source 22 named F3 (e.g., cow manure from production area C) is Rc3. The calculation device 50 may calculate the mixing ratio Rx based on the following formula 1.

number

[0098] The calculation device 50 (see FIG. 1) may calculate the decomposition condition Cd based on the mixing ratio Rx. In this example, the calculation device 50 calculates the decomposition condition Cd shown in FIG. 13 based on the mixing ratio Rx. The calculation device 50 may calculate the mixing ratio Rx for each period T, and may calculate the decomposition condition Cd based on the mixing ratio Rx for each period T.

[0099] 14 is a diagram showing another example of the fertilizer source information If. In this example, the constraint Cx further includes the ratio of components N1 to N3. The ratio may be the molar ratio, mass ratio, or concentration ratio of components N1 to N3. The ratio of components N1 to N3 is, for example, 1:2:4.

[0100] The calculation device 50 (see FIG. 1) may calculate a mass ratio Rm of carbon atoms to nitrogen atoms in the fertilizer source 22 based on the mutual ratios of the multiple inorganic components N. In this example, the calculation device 50 calculates the mass ratio Rm based on the ratios of the components N1 to N3. The calculation device 50 may select one or more fertilizer sources 22 based on the mass ratio Rm based on the mutual ratios of the multiple inorganic components N. The calculation device 50 may calculate a mixing ratio Rx of the multiple fertilizer sources 22 based on the mass ratio Rm based on the mutual ratios of the multiple inorganic components N. If the calculation device 50 cannot calculate the mixing ratio Rx of one fertilizer source 22 based on the mass ratio Rm, it may calculate the mixing ratio Rx of the multiple fertilizer sources 22. When calculating the mixing ratio Rx of the multiple fertilizer sources 22, the calculation device 50 may calculate the mixing ratio Rx by giving priority to the fertilizer source 22 with a larger inventory amount As (see FIG. 11) of the fertilizer source 22.

[0101] 11, if the threshold value Rth is 10, the unknown quantity a is calculated as 0.4 from Equation 1. As a result, the mixing ratio Cx of the fertilizer source 22 named F1 and the fertilizer source 22 named F3 in this example is calculated as 2:3.

[0102] FIG. 15 is a diagram showing another example of a cultivation apparatus 100 according to an embodiment of the present invention. In this example, an organic matter sensor 11 and a conductivity sensor 17 are provided in the decomposition tank 10. In this example, the cultivation apparatus 100 further includes a temperature control device 70 and a concentration control device 72. The cultivation apparatus 100 of this example differs from the cultivation apparatus 100 shown in FIG. 1 in these respects. In this example, the control device 110 further includes a memory device 52. In FIG. 15, the decomposition tanks 10-1 to 10-3 shown in FIG. 1 are shown as one decomposition tank 10. In FIG. 15, the cultivation tanks 90-1 to 90-4 shown in FIG. 1 are shown as one cultivation tank 90.

[0103] The calculation device 50 may calculate the concentration Df (see FIGS. 9 and 12) of the fertilizer source 22 in the liquid 13 under the decomposition conditions Cd. The concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 based on the concentration Df calculated by the calculation device 50. The concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 by controlling the fertilizer source dosing device 20. The concentration control device 72 may control the concentration of the fertilizer source 22 so that the concentration of the fertilizer source 22 in the liquid 13 becomes the concentration Df calculated by the calculation device 50.

[0104] The concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 by controlling the fertilizer source input device 20 to input at least one of the fertilizer source 22 and H2O (water) into the liquid 13. The liquid 13 to which at least one of the fertilizer source 22 and H2O (water) is input may be the decomposition liquid 12 purified by the purification tank 80.

[0105] The calculation device 50 may determine whether the concentration of the fertilizer source 22 in the decomposition liquid 12 is equal to or greater than a first threshold value and equal to or less than a second threshold value. The first threshold value is defined as threshold value Rt1. The second threshold value is defined as threshold value Rt2. The threshold value Rt1 may be the minimum concentration of the fertilizer source 22 at which an active state of microorganisms in the decomposition liquid 12 can be maintained. The threshold value Rt2 may be the maximum concentration of the fertilizer source 22 at which an active state of microorganisms in the decomposition liquid 12 can be maintained. The concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 when the calculation device 50 determines that the concentration of the fertilizer source 22 is equal to or greater than the first threshold value Rt1 and equal to or less than the second threshold value Rt2.

[0106] When the calculation device 50 determines that the concentration of the fertilizer source 22 is less than the first threshold value Rt1, the concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 so that the concentration of the fertilizer source 22 becomes equal to or greater than the first threshold value Rt1. The concentration control device 72 may control the fertilizer source dosing device 20 so that the fertilizer source dosing device 20 doses the fertilizer source 22 into the liquid 13 in an amount that makes the concentration of the fertilizer source 22 equal to or greater than the first threshold value Rt1. This allows the active state of the microorganisms in the decomposition liquid 12 to be maintained.

[0107] When the fertilizer source dosing device 20 adds an amount of fertilizer source 22 to the decomposition liquid 12 such that the concentration of the fertilizer source 22 becomes equal to or greater than the first threshold value Rt1, and the concentration D of the inorganic component N (see FIGS. 5, 7, and 12) exceeds the concentration D of the inorganic component N in the nutrient component profile Pf, the fertilizer source dosing device 20 may add H2O (water) to the liquid 13. The fertilizer source dosing device 20 may dilute the liquid 13 by adding H2O (water) to the liquid 13.

[0108] When the calculation device 50 determines that the concentration of the fertilizer source 22 exceeds the second threshold value Rt2, the concentration control device 72 may control the concentration of the fertilizer source 22 in the liquid 13 so that the concentration of the fertilizer source 22 becomes equal to or less than the second threshold value Rt2. The concentration control device 72 may control the fertilizer source dosing device 20 so that the fertilizer source dosing device 20 doses at least one of the fertilizer source 22 and H2O (water) into the liquid 13 in an amount that makes the concentration of the fertilizer source 22 become equal to or less than the second threshold value Rt2. This allows the active state of microorganisms in the liquid 13 to be maintained.

[0109] If the concentration of the fertilizer source 22 calculated by the calculation device 50 exceeds the concentration of the second threshold Rt2, the fertilizer source dosing device 20 may douse the fertilizer source 22 into the liquid 13 in an amount that results in a concentration of the second threshold Rt2. The calculation device 50 may notify a user of the cultivation device 100 of a shortage of the fertilizer source 22. The cultivation device 100 may be provided with a reserve tank that stores excess decomposition liquid 12. If the reserve tank stores decomposition liquid 12 having a concentration equal to or greater than the second threshold Rt2, the dosing device 40 may administer the stored decomposition liquid 12 to the cultivation target 92.

[0110] The decomposition tank 10 may be provided with an ORP (Oxdation Reduction Potential) sensor 14, a DO (Dissolved Oxygen) sensor 15, and a pH sensor 16. The ORP sensor 14, the DO sensor 15, and the pH sensor 16 may be included in the organic matter sensor 11.

[0111] The ORP sensor 14 measures the oxidation-reduction potential of the liquid 13. The DO sensor 15 measures the dissolved oxygen concentration in the liquid 13. The pH sensor 16 measures the pH of the liquid 13. The conductivity sensor 17 measures the electrical conductivity of the liquid 13.

[0112] The organic matter sensor 11 measures the concentration of organic matter 24 in the liquid 13. The organic matter sensor 11 may be provided in the decomposition tank 10. The organic matter sensor 11 may measure the concentration of organic matter 24 in the liquid 13 in the decomposition tank 10. The organic matter sensor 11 may measure the concentration of organic matter 24 contained in the fertilizer source 22 that has not been mineralized by the decomposition tank 10.

[0113] FIG. 16 is a diagram showing an example of measurement of the oxidation-reduction potential of the liquid 13 using the ORP sensor 14. The ORP sensor 14 may have a reference electrode 120, a liquid-contacting electrode 122, and a voltmeter 124. The reference electrode 120 does not contact the liquid 13. The liquid-contacting electrode 122 contacts the liquid 13. The potential of the reference electrode 120 is maintained at a constant potential regardless of the object whose oxidation-reduction potential is being measured. The voltmeter 124 measures the potential difference between the reference electrode 120 and the liquid-contacting electrode 122.

[0114] The potential difference between the reference electrode 120 and the liquid-contacting electrode 122 is defined as potential difference Eh. The potential of the reference electrode 120 is defined as potential Eh0. The potential difference Eh is expressed by the following equation 2, known as the Nernst equation.

number

[0115] 17 is a diagram showing an example of the relationship between time and the voltage of the liquid 13 measured by the ORP sensor 14. The voltage of the liquid 13 refers to the potential difference between the reference electrode 120 (see FIG. 16) and the liquid-contacting electrode 122 (see FIG. 16).

[0116] At time zero, the potential difference Eh is a certain potential difference Eh1. At time t1, the organic matter 24 is added to the decomposition liquid 12. Time t3 is the current time. Since the organic matter 24 is a reduced form, the concentration Red of the reduced form in equation (1) increases after time t1. Therefore, the potential difference Eh begins to decrease after time t1.

[0117] As the organic matter 24 is decomposed in the decomposition tank 10 and the concentration Red of the reductants continues to decrease, at a certain time t2, the concentrations of the oxidants and the reductants in the liquid 13 become equal. At this time t2, the potential difference Eh becomes equal to the potential Eh0 in equation (1). This potential difference Eh at time t2 is the minimum value of the potential difference Eh. This minimum value of the potential difference Eh is designated as the potential difference Eh3. After time t2, the concentration of the oxidants in the liquid 13 becomes higher than the concentration of the reductants. As a result, the potential difference Eh begins to increase.

[0118] When all of the organic matter 24 is decomposed in the decomposition tank 10 and the concentration of reduced substances Red becomes zero, the potential difference Eh becomes equal to the potential difference Eh1 at time zero. After time t2, the potential difference Eh converges to the potential difference Eh1 over time. The time at which the potential difference Eh converges to the potential difference Eh1 is defined as time te'.

[0119] The difference between the potential difference Eh1 and the potential difference Eh3 is defined as difference Ew1. The difference between the potential difference Eh1 and the potential difference Eh2 is defined as difference Ew2. The amount of organic matter 24 introduced into the liquid 13 at time t1 is defined as amount Ag1. The amount of organic matter 24 contained in the decomposition liquid 12 at time t3 is defined as amount Ag2. The amount Ag2 is expressed by the following equation 3.

number

[0120] Figure 18 is a diagram showing an example of the relationship between time and the pH of the liquid 13 and the decomposition liquid 12 measured by the pH sensor 16. The pH of the liquid 13 at time zero is pH1. As in Figure 17, it is assumed that organic matter 24 is added to the liquid 13 at time t1, and time t3 is the current time. The pH of the liquid 13 at time t3 is pH2.

[0121] Since the organic matter 24 is a reduced form, the pH of the liquid 13 starts to increase after time t1. When all of the organic matter 24 is decomposed in the decomposition tank 10, the pH of the decomposition liquid 12 converges to a constant value. This constant value is pH3. At time te', the pH of the decomposition liquid 12 converges to pH3. As the organic matter 24 is decomposed, NH4 + (ammonium ion).

[0122] The difference between Ph3 and Ph1 is defined as difference Pw1. The difference between Ph2 and Ph1 is defined as difference Pw2. As described above, the amount of organic matter 24 introduced into the decomposition tank 10 at time t1 is defined as amount Ag1, and the amount of organic matter 24 contained in the liquid 13 at time t3 is defined as amount Ag2. The relationship between amount Ag1 and difference Pw1 may be measured in advance. The relationship between amount Ag1 and difference Pw1 is defined as relationship Re. The relationship Re may be stored in the storage device 52 (see FIG. 15).

[0123] The amount Ag2 is expressed by the following equation 4.

number

[0124] The calculation device 50 (see FIG. 15) may calculate the decomposition condition Cb based on the concentration of the organic matter 24 measured by the organic matter sensor 11. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration. The predetermined concentration of the organic matter 24 may differ for each type of cultivation target 92 (see FIG. 15).

[0125] When the decomposition solution 12 containing the organic matter 24 is administered to the object to be cultivated 92 (see FIG. 15), the organic matter 24 may cause stress to the object to be cultivated 92. When stress is administered to the object to be cultivated 92, the color of the cultivated object to be cultivated 92 may change compared to when stress is not administered. When the object to be cultivated 92 is lettuce and stress is administered to the lettuce, the color of part of the lettuce may turn red. In this way, when the decomposition solution 12 containing the organic matter 24 is administered to the object to be cultivated 92, the cultivation device 100 (see FIG. 15) may cultivate an object to be cultivated 92 that stimulates consumer purchasing desire.

[0126] The temperature control device 70 controls the temperature of the liquid 13. The temperature control device 70 (see FIG. 15 ) may control the temperature of the liquid 13 based on the concentration of the organic matter 24 measured by the organic matter sensor 11. The temperature control device 70 may control the temperature of the liquid 13 in the decomposition tank 10. The temperature of the liquid 13 is defined as temperature T.

[0127] The calculation device 50 (see FIG. 15) may calculate the temperature T of the liquid 13 at which the concentration of the organic matter 24 in the decomposition liquid 12 at a predetermined time becomes a predetermined concentration. The predetermined time is defined as time th. The predetermined concentration is defined as concentration dh. The time th may be a time desired by the user of the cultivation device 100. The concentration dh may be a concentration desired by the user of the cultivation device 100. The temperature T of the decomposition liquid 12 calculated by the calculation device 50 is defined as temperature Ta.

[0128] The temperature control device 70 (see FIG. 15) may control the temperature T of the liquid 13 so that the temperature T of the liquid 13 becomes a temperature Ta. When the temperature T is within a desired range, the organic matter 24 introduced into the decomposition tank 10 is likely to be mineralized by microorganisms more quickly than when the temperature T is outside the desired range. The temperature Ta may be a temperature T within the desired range. By the temperature control device 70 controlling the temperature T of the liquid 13, the user of the cultivation device 100 can control the concentration of the organic matter 24 in the decomposition liquid 12.

[0129] The calculation device 50 (see FIG. 15 ) may correct the nutrient component profile Pf based on the concentration of the organic matter 24 measured by the organic matter sensor 11. The nutrient component profile Pf may be an expected profile of inorganic matter in the decomposition liquid 12. Therefore, the concentration of inorganic matter based on the nutrient component profile Pf may differ from the concentration of inorganic matter produced by decomposition of the organic matter 24. By correcting the nutrient component profile Pf based on the concentration of the organic matter 24, the nutrient component profile Pf may become a more accurate profile that reflects more accurate concentrations of inorganic matter.

[0130] The calculation device 50 (see FIG. 15) may calculate the decomposition conditions Cb based on the nutrient component profile Pf corrected based on the concentration of the organic matter 24. This can result in more accurate decomposition conditions Cb than when the decomposition conditions Cb are based on the nutrient component profile Pf before correction.

[0131] The calculation device 50 (see FIG. 15) may calculate the decomposition condition Cb based on the pH of the liquid 13 measured by the pH sensor 16 (see FIG. 15). The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration. The fertilizer source dosing device 20 (see FIG. 15) may dosing at least one of the fertilizer source 22 and H2O (water) into the liquid 13 based on the calculated decomposition condition Cb. As described above, when the organic matter 24 is converted into NH4 +(ammonium ions), the pH of the liquid 13 increases. If the rate at which the pH of the liquid 13 measured by the pH sensor 16 increases is slower than a predetermined rate, the fertilizer source dosing device 20 may dosing the fertilizer source 22 into the liquid 13. This may increase the rate at which the pH of the liquid 13 increases. If the rate at which the pH of the liquid 13 measured by the pH sensor 16 increases is faster than a predetermined rate, the fertilizer source dosing device 20 may dosing H2O (water) into the liquid 13. This may slow the rate at which the pH of the liquid 13 increases.

[0132] NH4 in liquid 13 + (Ammonium ion) is converted by microorganisms into NO2 - (nitrite ion) + (Ammonium ion) is converted by microorganisms into NO2 - When the fertilizer source 22 is decomposed into nitrite ions, the pH of the liquid 13 is more likely to decrease than before the decomposition. If the pH of the liquid 13 measured by the pH sensor 16 is lower than a predetermined pH, the fertilizer source input device 20 may input the fertilizer source 22 into the liquid 13. The predetermined pH may be a pH desired by a user of the cultivation device 100 (see FIG. 15 ). This makes it easier for the pH of the liquid 13 to increase than before the fertilizer source 22 was input. If the pH of the liquid 13 measured by the pH sensor 16 is higher than the predetermined pH, the fertilizer source input device 20 may input H2O (water) into the liquid 13. This makes it harder for the pH of the liquid 13 to increase than before the H2O (water) was input.

[0133] The calculation device 50 (see FIG. 15 ) may calculate the timing for adding the fertilizer source 22 to the liquid 13 based on the pH of the liquid 13 measured by the pH sensor 16. The calculation device 50 may calculate the timing for adding the fertilizer source 22 to the liquid 13 based on the measured pH of the liquid 13 and the nutrient component profile Pf. The fertilizer source adding device 20 may add the fertilizer source 22 to the liquid 13 at the timing calculated by the calculation device 50.

[0134] The calculation device 50 (see FIG. 15) may calculate the decomposition condition Cb based on the electrical conductivity of the liquid 13 measured by the electrical conductivity sensor 17 (see FIG. 15). The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration. The fertilizer source dosing device 20 (see FIG. 15) may douse at least one of the fertilizer source 22 and H2O (water) into the liquid 13 based on the calculated decomposition condition Cb. As described above, the NH4 + (Ammonium ion) is converted by microorganisms into NO2 - (nitrite ion) + (Ammonium ion) is converted by microorganisms into NO2 - When the liquid 13 is decomposed into nitrite ions, the electrical conductivity of the liquid 13 is likely to decrease compared to before the decomposition.

[0135] When the electrical conductivity of the liquid 13 measured by the electrical conductivity sensor 17 (see FIG. 15) is higher than a predetermined electrical conductivity, the fertilizer source input device 20 may input the fertilizer source 22 into the liquid 13. The predetermined electrical conductivity may be an electrical conductivity desired by a user of the cultivation apparatus 100 (see FIG. 15). As a result, the electrical conductivity of the liquid 13 is likely to decrease compared to before the fertilizer source 22 was input. When the electrical conductivity of the liquid 13 measured by the electrical conductivity sensor 17 (see FIG. 15) is lower than the predetermined electrical conductivity, the fertilizer source input device 20 may input H2O (water) into the liquid 13. As a result, the electrical conductivity of the liquid 13 is likely to increase compared to before the H2O (water) was input.

[0136] The calculation device 50 (see FIG. 15 ) may calculate the timing for adding the fertilizer source 22 to the liquid 13 based on the electrical conductivity of the liquid 13 measured by the electrical conductivity sensor 17. The calculation device 50 may calculate the timing for adding the fertilizer source 22 to the liquid 13 based on the measured electrical conductivity of the liquid 13 and the nutrient component profile Pf. The fertilizer source adding device 20 may add the fertilizer source 22 to the liquid 13 at the timing calculated by the calculation device 50.

[0137] FIG. 19 is a diagram showing an example of the relationship between time and the pH of the liquid 13 and the decomposition liquid 12 measured by the pH sensor 16, along with a reference profile Pfc1. In FIG. 19, the reference profile Pfc1 is shown by a thick solid line. The reference profile Pfc1 may be determined based on multiple measurement results of the relationship between the actual measured pH values ​​of the liquid 13 and the decomposition liquid 12 and time t. The reference profile Pfc1 may be an average of the multiple measurement results. In FIG. 19, the relationship shown by the thin solid line from time zero to time t3 is the same as in FIG. 18.

[0138] In the reference profile Pfc1, the pH of the liquid 13 at time t3 is defined as PHc. The difference between PHc and PH1 is defined as the difference Pwc. The calculation device 50 (see FIG. 15) may determine whether the pH of the liquid 13 measured by the pH sensor 16 is larger or smaller than the predetermined reference profile Pfc1. The calculation device 50 may calculate the difference between the pH of the liquid 13 measured by the pH sensor 16 at a certain time t and the pH on the reference profile Pfc1 at that certain time t. In this example, the calculation device 50 determines whether the difference Pw2 and the difference Pwc at time t3 are larger or smaller, and calculates the difference between the difference Pw2 and the difference Pwc. The difference between the difference Pwc and the difference Pw2 (difference Pwc - difference Pw2) is defined as the difference Pwd.

[0139] The temperature control device 70 (see FIG. 15) may control the temperature of the liquid 13 based on the difference Pwd. When the difference Pwd is positive, the temperature control device 70 may control the temperature of the liquid 13 to increase. This may promote decomposition of the organic matter 24 in the liquid 13. This may cause the pH of the liquid 13 to approach the reference profile Pfc1. When the difference Pwd is negative, the temperature control device 70 may control the temperature of the liquid 13 to decrease. This may suppress decomposition of the organic matter 24 in the liquid 13. This may cause the pH of the liquid 13 to approach the reference profile Pfc1.

[0140] The fertilizer source input device 20 (see FIG. 15 ) may input one fertilizer source 22 into the liquid 13 based on the difference Pwd. When the difference Pwd is positive, the fertilizer source input device 20 may input into the liquid 13 a fertilizer source 22 having a mass ratio Rm of carbon atoms to nitrogen atoms that is smaller than the mass ratio Rm of carbon atoms to nitrogen atoms contained in the fertilizer source 22 input into the liquid 13. This may promote decomposition of the organic matter 24 in the liquid 13. This may cause the pH of the liquid 13 to approach the reference profile Pfc1. When the difference Pwd is negative, the fertilizer source input device 20 may input into the liquid 13 a fertilizer source 22 having a mass ratio Rm of carbon atoms to nitrogen atoms that is larger than the mass ratio Rm of carbon atoms to nitrogen atoms contained in the fertilizer source 22 input into the liquid 13. This may suppress decomposition of the organic matter 24 in the liquid 13. This may cause the pH of the liquid 13 to approach the reference profile Pfc1.

[0141] 20 is a diagram showing an example of the relationship between the conductivity σ of the liquid 13 and the decomposition liquid 12 measured by the conductivity sensor 17 and time t, along with a reference profile Pfc2. In FIG. 20, the reference profile Pfc2 is indicated by a thick solid line. The reference profile Pfc2 may be determined based on multiple measurement results of the relationship between the actual measured values ​​of the conductivity σ of the liquid 13 and the decomposition liquid 12 and time t. The reference profile Pfc2 may be an average of the multiple measurement results.

[0142] The conductivity σ of the liquid 13 at time zero is defined as σ1. As in Figures 17 and 18, it is assumed that the organic matter 24 is added to the liquid 13 at time t1, and time t3 is the current time. The conductivity σ of the liquid 13 at time t3 is defined as σ2.

[0143] After time t1 when the organic matter 24 is added, the conductivity σ of the liquid 13 begins to increase. When all of the organic matter 24 is decomposed by the decomposition tank 10, the conductivity σ of the decomposition liquid 12 converges to a constant value. This constant value is defined as σ3. At time te', the conductivity σ of the decomposition liquid 12 converges to σ3. The difference between σ3 and σ1 is defined as the difference σw1. The difference between σ2 and σ1 is defined as the difference σw2.

[0144] In the reference profile Pfc2, the conductivity σ of the decomposition liquid 12 at time t3 is defined as σc, and the difference between σc and σ1 is defined as the difference σwc.

[0145] The calculation device 50 (see FIG. 15) may determine whether the conductivity σ of the liquid 13 measured by the conductivity sensor 17 is larger or smaller than a predetermined reference profile Pfc2. The calculation device 50 may calculate the difference between the conductivity of the liquid 13 measured by the conductivity sensor 17 at a certain time t and the conductivity σ on the reference profile Pfc2 at that certain time t. In this example, the calculation device 50 determines whether the difference σw2 and the difference σwc at time t3 are larger or smaller, and calculates the difference between the difference σw2 and the difference σwc. The difference between the difference σwc and the difference σw2 (difference σwc - difference σw2) is defined as the difference σwd.

[0146] The temperature control device 70 (see FIG. 15) may control the temperature of the liquid 13 based on the difference σwd. When the difference σwd is positive, the temperature control device 70 may control the temperature of the liquid 13 to increase. This may promote decomposition of the organic matter 24 in the liquid 13. This may cause the electrical conductivity σ of the liquid 13 to approach the reference profile Pfc2. When the difference σwd is negative, the temperature control device 70 may control the temperature of the liquid 13 to decrease. This may suppress decomposition of the organic matter 24 in the liquid 13. This may cause the electrical conductivity σ of the liquid 13 to approach the reference profile Pfc2.

[0147] The fertilizer source input device 20 (see FIG. 15 ) may input one fertilizer source 22 into the liquid 13 based on the difference σwd. When the difference σwd is positive, the fertilizer source input device 20 may input into the liquid 13 a fertilizer source 22 having a mass ratio Rm of carbon atoms to nitrogen atoms that is smaller than the mass ratio Rm of carbon atoms to nitrogen atoms contained in the fertilizer source 22 input into the liquid 13. This may promote decomposition of the organic matter 24 in the liquid 13. This may cause the electrical conductivity σ of the liquid 13 to approach the reference profile Pfc2. When the difference σwd is negative, the fertilizer source input device 20 may input into the liquid 13 a fertilizer source 22 having a mass ratio Rm of carbon atoms to nitrogen atoms that is larger than the mass ratio Rm of carbon atoms to nitrogen atoms contained in the fertilizer source 22 input into the liquid 13. This may suppress decomposition of the organic matter 24 in the liquid 13. This may cause the electrical conductivity σ of the liquid 13 to approach the reference profile Pfc2.

[0148] Figure 21 is a diagram showing another example of the cultivation device 100 according to an embodiment of the present invention. In this example, the cultivation object 92 is placed in the cultivation space 98. This is the difference between this example and the cultivation device 100 shown in Figure 15. In Figure 21, the cultivation space 98 is indicated by a thick, roughly dashed line.

[0149] The cultivation space 98 may be a closed space or an open space. When the cultivation space 98 is a closed space, it means that the cultivation space 98 is, for example, a room, indoors, etc. When the cultivation space 98 is a closed space, the closed space may be, for example, a room that can be ventilated with the outside of the cultivation space 98, and does not need to be a space that is 100% isolated from the outside of the cultivation space 98. When the cultivation space 98 is an open space, it means that the cultivation space 98 is, for example, outdoors.

[0150] The cultivation space 98 may be provided with an acquisition device 97, a temperature and humidity sensor 95, and a CO2 (carbon dioxide) sensor 96. The acquisition device 97 may include a pyranometer 93 and a sunshine meter 94. The cultivation device 100 may include the acquisition device 97, the temperature and humidity sensor 95, and the CO2 (carbon dioxide) sensor 96.

[0151] The acquisition device 97 acquires at least one of the amount of solar radiation and the duration of sunlight on the cultivation object 92. The temperature and humidity sensor 95 measures at least one of the temperature and humidity in the cultivation space 98. The CO2 (carbon dioxide) sensor 96 measures the CO2 (carbon dioxide) concentration in the cultivation space 98. The pyranometer 93 measures the amount of solar radiation on the cultivation space 98. The pyranometer 93 may be a thermoelectric element. The photometer 94 measures the duration of sunlight on the cultivation space 98.

[0152] When the cultivation space 98 is a closed space such as a room, the acquisition device 97, the temperature and humidity sensor 95, and the CO2 (carbon dioxide) sensor 96 may be provided on a wall, ceiling, or the like of the room. When the cultivation space 98 is an open space such as outdoors, the acquisition device 97, the temperature and humidity sensor 95, and the CO2 (carbon dioxide) sensor 96 may be placed within a predetermined distance from the cultivation target 92, such as in the cultivation tank 90. ​​The predetermined distance is, for example, a distance close enough for the temperature and humidity sensor 95 to measure the ambient air temperature of the cultivation target 92.

[0153] The calculation device 50 may calculate the decomposition conditions Cb based on at least one of the amount of sunlight and the duration of sunlight on the target to be cultivated 92, which are acquired by the acquisition device 97. The decomposition conditions Cb may be those under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration. The fertilizer source input device 20 may input at least one of the fertilizer source 22 and H2O (water) into the decomposition solution 12 based on the calculated decomposition conditions Cb. The amount of sunlight and the duration of sunlight on the target to be cultivated 92 may depend on the weather of the location where the target to be cultivated 92 is cultivated. The amount of sunlight or the duration of sunlight on the target to be cultivated 92 may vary depending on the amount of sunlight or the duration of sunlight on the target to be cultivated 92. The greater the amount of sunlight on the target to be cultivated 92 and the longer the duration of sunlight, the more likely the target to be cultivated 92 will consume the decomposition solution 12. Therefore, the greater the amount of sunlight on the target to be cultivated 92 and the longer the duration of sunlight, the lower the concentration of the fertilizer source 22 in the decomposition solution 12 is likely to be. The decomposition conditions Cb are calculated based on at least one of the amount of solar radiation and the duration of sunlight on the cultivation object 92, and at least one of the fertilizer source 22 and H2O (water) is added to the liquid 13 based on the decomposition conditions Cb, making it easier to add at least one of the fertilizer source 22 and H2O (water) to the liquid 13 in an amount that reflects at least one of the amount of solar radiation and the duration of sunlight.

[0154] The calculation device 50 may calculate, as the decomposition condition Cb, the amount of at least one of the fertilizer source 22 and H2O (water) to be added to the liquid 13 based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device 97. The fertilizer source addition device 20 may add the amount of at least one of the fertilizer source 22 and H2O (water) calculated by the calculation device 50 to the liquid 13. The calculation device 50 may further calculate, as the decomposition condition Cb, the timing for adding at least one of the fertilizer source 22 and H2O (water) to the liquid 13 based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device 97. The fertilizer source addition device 20 may add at least one of the fertilizer source 22 and H2O (water) to the liquid 13 at the timing calculated by the calculation device 50.

[0155] The calculation device 50 may correct at least one of the nutrient component profile Pf and the decomposition condition Cb based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device 97. As described above, the amount of decomposition solution 12 consumed by the cultivation object 92 may vary depending on the amount of solar radiation or the duration of sunlight on the cultivation object 92. Therefore, the concentration of minerals in the decomposition solution 12 may vary depending on the amount of solar radiation or the duration of sunlight on the cultivation object 92. Therefore, the concentration of minerals based on the nutrient component profile Pf may differ from the actual concentration of minerals in the decomposition solution 12.

[0156] If the amount of sunlight or the duration of sunlight acquired by the acquisition device 97 is greater than the predetermined amount of sunlight or the duration of sunlight, respectively, the calculation device 50 may correct the nutrient component profile Pf so that the mineral concentrations based on the nutrient component profile Pf increase. If the amount of sunlight or the duration of sunlight acquired by the acquisition device 97 is less than the predetermined amount of sunlight or the duration of sunlight, respectively, the calculation device 50 may correct the nutrient component profile Pf so that the mineral concentrations based on the nutrient component profile Pf decrease. The predetermined amount of sunlight and the duration of sunlight are the average amount of sunlight and the duration of sunlight for the location and time when the cultivation target 92 is cultivated, respectively, and may be the amount of sunlight and the duration of sunlight published by the Japan Meteorological Agency, a weather forecasting company, etc. Correcting the nutrient component profile Pf based on at least one of the amount of sunlight and the duration of sunlight can result in a more accurate profile that reflects more accurate mineral concentrations.

[0157] The calculation device 50 may calculate the decomposition conditions Cb based on the corrected nutrient component profile Pf. As described above, the decomposition conditions Cb may include at least one of the concentrations of one or more inorganic substances in the decomposition liquid 12 (see FIG. 1), the purified amount and purification time of the decomposition liquid 12 purified by the purification tank 80 (see FIG. 1), the temperature of the liquid 13, and the number of decomposition tanks 10. The calculation device 50 may correct at least one of the concentrations of one or more inorganic substances in the decomposition liquid 12, the purified amount and purification time of the decomposition liquid 12 purified by the purification tank 80, the temperature of the liquid 13, and the number of decomposition tanks 10.

[0158] The decomposition tank 10 may generate the decomposition solution 12 based on the corrected decomposition conditions Cb. The administration device 40 may administer the generated decomposition solution 12 to the cultivation object 92.

[0159] The calculation device 50 may calculate the decomposition condition Cb based on at least one of the temperature and humidity in the cultivation space 98 measured by the temperature and humidity sensor 95. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration. The fertilizer source dosing device 20 may dosing at least one of the fertilizer source 22 and H2O (water) into the liquid 13 based on the calculated decomposition condition Cb. The amount of the decomposition liquid 12 consumed by the object to be cultivated 92 may vary depending on the temperature or humidity in the cultivation space 98. The more the temperature and humidity in the cultivation space 98 are suitable for the object to be cultivated 92, the more likely the object to be cultivated 92 will consume the decomposition liquid 12. Therefore, the more the temperature and humidity in the cultivation space 98 are suitable for the object to be cultivated 92, the more likely the concentration of the fertilizer source 22 in the decomposition liquid 12 will be reduced. The decomposition conditions Cb are calculated based on at least one of the temperature and humidity in the cultivation space 98, and at least one of the fertilizer source 22 and H2O (water) is added to the liquid 13 based on the decomposition conditions Cb, making it easier for at least one of the fertilizer source 22 and H2O (water) to be added to the liquid 13 in an amount that reflects at least one of the temperature and humidity in the cultivation space 98.

[0160] The calculation device 50 may calculate, as the decomposition condition Cb, the amount of at least one of the fertilizer source 22 and H2O (water) to be added to the liquid 13 based on at least one of the temperature and humidity measured by the temperature and humidity sensor 95. The fertilizer source addition device 20 may add the amount of at least one of the fertilizer source 22 and H2O (water) calculated by the calculation device 50 to the liquid 13. The calculation device 50 may further calculate, as the decomposition condition Cb, the timing for adding at least one of the fertilizer source 22 and H2O (water) to the liquid 13 based on at least one of the temperature and humidity measured by the temperature and humidity sensor 95. The fertilizer source addition device 20 may add at least one of the fertilizer source 22 and H2O (water) to the liquid 13 at the timing calculated by the calculation device 50.

[0161] The calculation device 50 may correct at least one of the nutrient component profile Pf and the decomposition condition Cb based on at least one of the temperature and humidity measured by the temperature and humidity sensor 95. As described above, the amount of the decomposition liquid 12 consumed by the cultivation target 92 may vary depending on the temperature or humidity in the cultivation space 98. Therefore, the concentration of minerals in the decomposition liquid 12 may vary depending on the temperature or humidity in the cultivation space 98. Therefore, the concentration of minerals based on the nutrient component profile Pf may differ from the actual concentration of minerals in the decomposition liquid 12.

[0162] If the temperature and humidity measured by the temperature and humidity sensor 95 are higher than the predetermined temperature and humidity, respectively, the calculation device 50 may correct the nutrient component profile Pf so that the mineral concentrations based on the nutrient component profile Pf increase. If the temperature and humidity measured by the temperature and humidity sensor 95 are lower than the predetermined temperature and humidity, respectively, the calculation device 50 may correct the nutrient component profile Pf so that the mineral concentrations based on the nutrient component profile Pf decrease. The predetermined temperature and humidity are the average annual temperature and humidity for the location and time when the cultivation target 92 is cultivated, and may be the temperature and humidity published by the Japan Meteorological Agency, a weather forecasting company, or the like. Correcting the nutrient component profile Pf based on at least one of the temperature and humidity can result in a more accurate profile that reflects more accurate mineral concentrations.

[0163] The calculation device 50 may calculate the decomposition conditions Cb based on the corrected nutrient component profile Pf. The decomposition tank 10 may generate the decomposition solution 12 based on the corrected decomposition conditions Cb. The administration device 40 may administer the generated decomposition solution 12 to the cultivation target 92.

[0164] The calculation device 50 may calculate the decomposition condition Cb based on the CO2 (carbon dioxide) concentration in the cultivation space 98 measured by the CO2 (carbon dioxide) sensor 96. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration. The fertilizer source supply device 20 may supply at least one of the fertilizer source 22 and H2O (water) to the liquid 13 based on the calculated decomposition condition Cb. The amount of the decomposition solution 12 consumed by the cultivation target 92 may vary depending on the CO2 (carbon dioxide) concentration in the cultivation space 98. The more suitable the CO2 (carbon dioxide) concentration in the cultivation space 98 is for the cultivation target 92, the more likely the cultivation target 92 will consume the decomposition solution 12. Therefore, the more suitable the CO2 (carbon dioxide) concentration in the cultivation space 98 is for the cultivation target 92, the more likely the concentration of the fertilizer source 22 in the decomposition solution 12 will be lower. The decomposition condition Cb is calculated based on the CO2 (carbon dioxide) concentration in the cultivation space 98, and at least one of the fertilizer source 22 and H2O (water) is added to the liquid 13 based on the decomposition condition Cb, making it easier to add at least one of the fertilizer source 22 and H2O (water) to the liquid 13 in an amount that reflects the CO2 (carbon dioxide) concentration in the cultivation space 98.

[0165] The computing device 50 may calculate the amount of fertilizer source 22 to be added to the liquid 13 based on the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96. The fertilizer source adding device 20 may add the amount of fertilizer source 22 calculated by the computing device 50 to the liquid 13. The computing device 50 may further calculate the timing for adding the fertilizer source 22 to the liquid 13 based on the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96. The fertilizer source adding device 20 may add the fertilizer source 22 to the liquid 13 at the timing calculated by the computing device 50.

[0166] The calculation device 50 may correct at least one of the nutrient component profile Pf and the decomposition condition Cb based on the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96. As described above, the amount of the decomposition solution 12 consumed by the cultivation target 92 may vary depending on the CO2 (carbon dioxide) concentration in the cultivation space 98. Therefore, the concentration of minerals in the decomposition solution 12 may vary depending on the CO2 (carbon dioxide) concentration in the cultivation space 98. Therefore, the concentration of minerals based on the nutrient component profile Pf may differ from the actual concentration of minerals in the decomposition solution 12.

[0167] If the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96 is greater or less than a predetermined CO2 (carbon dioxide) concentration, the calculation device 50 may correct the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf are increased. The calculation device 50 may correct the nutrient component profile Pf based on the difference between the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96 and the predetermined CO2 (carbon dioxide) concentration. The predetermined CO2 (carbon dioxide) concentration may be an optimal CO2 (carbon dioxide) concentration for the cultivation target 92 and may differ for each type of cultivation target 92. Correcting the nutrient component profile Pf based on the CO2 (carbon dioxide) concentration can result in a more accurate profile that reflects more accurate concentrations of minerals.

[0168] The calculation device 50 may correct at least one of the nutrient component profile Pf and the decomposition conditions Cb based on at least one of the temperature and humidity measured by the temperature and humidity sensor 95, or the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96. The calculation device 50 may correct at least one of the nutrient component profile Pf and the decomposition conditions Cb based on at least one of the temperature and humidity measured by the temperature and humidity sensor 95 and the CO2 (carbon dioxide) concentration measured by the CO2 (carbon dioxide) sensor 96.

[0169] The calculation device 50 may calculate the decomposition conditions Cb based on the corrected nutrient component profile Pf. The decomposition tank 10 may generate the decomposition solution 12 based on the corrected decomposition conditions Cb. The administration device 40 may administer the generated decomposition solution 12 to the cultivation target 92.

[0170] Fig. 22 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. In this example, a growth state sensor 99 is arranged in the cultivation space 98. This example differs from the cultivation apparatus 100 shown in Fig. 21 in this respect. The cultivation apparatus 100 may be equipped with the growth state sensor 99.

[0171] The growth state sensor 99 measures the growth state of the cultivation object 92. The growth state of the cultivation object 92 may be the height of the cultivation object 92. If the cultivation object 92 is a plant, the growth state of the cultivation object 92 may be the flowering state of the plant, the ripening state of the fruit of the plant, or the state of the leaves, stems, or roots of the plant. The growth state sensor 99 is, for example, a camera.

[0172] The arithmetic device 50 may calculate the decomposition condition Cb based on the growth state of the cultivation target 92 measured by the growth state sensor 99. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration. The administration device 40 may administer at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92 based on the calculated decomposition condition Cb. The growth state of the cultivation target 92 measured by the growth state sensor 99 tends to reflect the actual growth state of the cultivation target 92. For this reason, by calculating the decomposition condition Cb based on the growth state of the cultivation target 92 and administering at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92 based on the decomposition condition Cb, the administration device 40 can easily administer an appropriate amount of at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92.

[0173] The arithmetic device 50 may calculate at least one of the amount and timing of administering at least one of the decomposition liquid 12 and H2O (water) to the cultivation target 92, based on the growth state of the cultivation target 92 measured by the growth state sensor 99. The amount of the decomposition liquid 12 and H2O (water) administered to the cultivation target 92 may be the mass or volume of the decomposition liquid 12 and H2O (water) administered to the cultivation target 92 per unit time, respectively. The administration device 40 may administer at least one of the decomposition liquid 12 and H2O (water) in the amount calculated by the arithmetic device 50 to the cultivation target 92 at the time calculated by the arithmetic device 50.

[0174] The arithmetic device 50 may correct the decomposition conditions Cb based on the growth state of the cultivation target 92 measured by the growth state sensor 99. As described above, the growth state of the cultivation target 92 measured by the growth state sensor 99 tends to reflect the actual growth state of the cultivation target 92. If the growth state of the cultivation target 92 measured by the growth state sensor 99 is not as advanced as the predetermined growth state, the arithmetic device 50 may correct the decomposition conditions Cb so that the concentration of inorganic matter resulting from the mineralization of part of the organic matter 24 increases. If the growth state of the cultivation target 92 measured by the growth state sensor 99 is more advanced than the predetermined growth state, the arithmetic device 50 may correct the decomposition conditions Cb so that the concentration of inorganic matter resulting from the mineralization of part of the organic matter 24 decreases. The predetermined growth state may be determined based on at least one of the average annual temperature and humidity at the location and time when the cultivation target 92 is cultivated, and the CO2 (carbon dioxide) concentration at the location where the cultivation target 92 is cultivated. The predetermined growth conditions may be past results for the location and time when the cultivation target 92 is cultivated. By correcting the decomposition conditions Cb based on the growth conditions of the cultivation target 92, the decomposition conditions Cb can become more appropriate decomposition conditions Cb.

[0175] The calculation device 50 may correct the nutrient component profile Pf based on the growth state of the cultivation object 92 measured by the growth state sensor 99. If the growth state of the cultivation object 92 measured by the growth state sensor 99 is not as advanced as the predetermined growth state described above, the calculation device 50 may correct the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf increase. If the growth state of the cultivation object 92 measured by the growth state sensor 99 is more advanced than the predetermined growth state, the calculation device 50 may correct the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf decrease. By correcting the nutrient component profile Pf based on the growth state of the cultivation object 92 measured by the growth state sensor 99, the nutrient component profile Pf can become a more appropriate profile.

[0176] The calculation device 50 may correct the decomposition conditions Cb based on the corrected nutrient component profile Pf. When the calculation device 50 corrects the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf increase, the calculation device 50 may correct the decomposition conditions Cb based on the nutrient component profile Pf so that the concentrations of minerals resulting from the partial mineralization of the organic matter 24 increase. When the calculation device 50 corrects the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf decrease, the calculation device 50 may correct the decomposition conditions Cb based on the nutrient component profile Pf so that the concentrations of minerals resulting from the partial mineralization of the organic matter 24 decrease. The decomposition tank 10 may generate the decomposition solution 12 based on the corrected decomposition conditions Cb. The administration device 40 may administer the generated decomposition solution 12 to the cultivation target 92.

[0177] Fig. 23 is a diagram showing another example of the cultivation apparatus 100 according to an embodiment of the present invention. In this example, a nutrient component sensor 42 is further arranged in the cultivation space 98. This example differs from the cultivation apparatus 100 shown in Fig. 22 in this respect.

[0178] The nutrient component sensor 42 measures the nutrient components of the decomposition liquid 12 administered to the cultivation target 92. In this example, the nutrient component sensor 42 includes at least one of a pH sensor 43 and a conductivity sensor 44. The nutrient component sensor 42 may be provided in the cultivation tank 90.

[0179] NH4 in decomposition solution 12 + (Ammonium ion) is converted by microorganisms into NO2 - (nitrite ion) + (Ammonium ion) is converted by microorganisms into NO2 - When the nitrite ions are decomposed into NH4, the pH of the decomposition solution 12 tends to decrease compared to before the decomposition. Therefore, the pH sensor 43 can measure the nutritional components of the decomposition solution 12 administered to the cultivation target 92. + (ammonium ion) is NO2 - When the decomposition solution 12 is decomposed into nitrite ions, the electrical conductivity of the decomposition solution 12 is likely to decrease compared to before the decomposition. Therefore, the electrical conductivity sensor 44 can measure the nutritional components of the decomposition solution 12 administered to the cultivation target 92.

[0180] The calculation device 50 may calculate the decomposition condition Cb based on the nutrient components of the decomposition liquid 12 measured by the nutrient component sensor 42. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration. The administration device 40 may administer at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92 based on the calculated decomposition condition Cb. The nutrient components of the decomposition liquid 12 measured by the nutrient component sensor 42 tend to reflect the actual nutrient components of the decomposition liquid 12. Therefore, by calculating the decomposition condition Cb based on the nutrient components of the decomposition liquid 12 and administering at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92 based on the decomposition condition Cb, the administration device 40 can more easily administer an appropriate amount of at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92.

[0181] The calculation device 50 may calculate at least one of the amount and timing of administering at least one of the decomposition liquid 12 and H2O (water) to the cultivation target 92 based on the nutritional components of the decomposition liquid 12 measured by the nutritional component sensor 42. The administration device 40 may administer at least one of the decomposition liquid 12 and H2O (water) in the amount calculated by the calculation device 50 to the cultivation target 92 at the time calculated by the calculation device 50.

[0182] The calculation device 50 may correct the decomposition condition Cb based on the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42. As described above, the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42 tend to reflect the actual nutrient components of the decomposition solution 12. If the concentrations of the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42 are greater than a predetermined concentration, the calculation device 50 may correct the decomposition condition Cb so that the concentration of inorganic matter resulting from the mineralization of a portion of the organic matter 24 decreases. If the concentrations of the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42 are less than a predetermined concentration, the calculation device 50 may correct the decomposition condition Cb so that the concentration of inorganic matter resulting from the mineralization of a portion of the organic matter 24 increases. By correcting the decomposition condition Cb based on the nutrient components of the decomposition solution 12, the decomposition condition Cb can become more appropriate.

[0183] The calculation device 50 may correct the nutrient component profile Pf based on the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42. If the concentrations of the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42 are greater than a predetermined concentration, the calculation device 50 may correct the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf decrease. If the concentrations of the nutrient components of the decomposition solution 12 measured by the nutrient component sensor 42 are less than a predetermined concentration, the calculation device 50 may correct the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf increase. By correcting the nutrient component profile Pf based on the nutrient components of the decomposition solution 12, the nutrient component profile Pf may become a more appropriate profile.

[0184] The calculation device 50 may correct the decomposition conditions Cb based on the corrected nutrient component profile Pf. When the calculation device 50 corrects the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf increase, the calculation device 50 may correct the decomposition conditions Cb based on the nutrient component profile Pf so that the concentrations of minerals resulting from the partial mineralization of the organic matter 24 increase. When the calculation device 50 corrects the nutrient component profile Pf so that the concentrations of minerals based on the nutrient component profile Pf decrease, the calculation device 50 may correct the decomposition conditions Cb based on the nutrient component profile Pf so that the concentrations of minerals resulting from the partial mineralization of the organic matter 24 decrease. The decomposition tank 10 may generate the decomposition solution 12 based on the corrected decomposition conditions Cb. The administration device 40 may administer the generated decomposition solution 12 to the cultivation target 92.

[0185] The calculation device 50 may correct the decomposition conditions Cb and may correct the nutrient component profile Pf based on the growth state of the cultivation target 92 measured by the growth state sensor 99 or the concentrations of nutrient components in the decomposition solution 12 measured by the nutrient component sensor 42. The calculation device 50 may correct the decomposition conditions Cb and may correct the nutrient component profile Pf based on the growth state of the cultivation target 92 measured by the growth state sensor 99 and the concentrations of nutrient components in the decomposition solution 12 measured by the nutrient component sensor 42.

[0186] Figure 24 is a diagram showing another example of a cultivation apparatus 100 according to an embodiment of the present invention. In this example, the decomposition tank 10 is provided with a decomposition liquid sensor 19. In this example, the cultivation apparatus 100 further includes a dosing control device 46, a valve 47, and a valve 45. The cultivation apparatus 100 of this example differs from the cultivation apparatus 100 shown in Figure 23 in these respects.

[0187] The decomposition liquid sensor 19 measures the components of the liquid 13. The components of the liquid 13 are referred to as component Co. The component Co of the liquid 13 may be the components of inorganic substances in the liquid 13 or the component ratio of the inorganic substances. The component Co of the liquid 13 may be the components of organic substances in the liquid 13 or the component ratio of the organic substances. The decomposition liquid sensor 19 may include an ORP sensor 14, a DO sensor 15, a pH sensor 16, and a conductivity sensor 17.

[0188] The decomposition liquid sensor 19 may be provided in the decomposition tank 10. A plurality of decomposition liquid sensors 19 may be provided in each of the plurality of decomposition tanks 10. In this example, decomposition liquid sensors 19-1 to 19-3 are provided in the decomposition tanks 10-1 to 10-3, respectively.

[0189] The administration control device 46 controls the timing at which the administration device 40 administers the decomposition solutions 12 produced in the plurality of decomposition tanks 10 to the cultivation target 92. In this example, the administration control device 46 controls the timing at which the administration device 40 administers the decomposition solutions 12-1 to 12-3 produced in the decomposition tanks 10-1 to 10-3 to the cultivation target 92, by controlling the valves 47-1 to 47-3.

[0190] The decomposition liquids 12-1 to 12-3 administered to the cultivation target 92 may be purified in a septic tank 80. The decomposition liquids 12-1 to 12-3 purified in the septic tank 80 may be introduced into the decomposition tank 10. The administration control device 46 may control the timing at which the decomposition liquids 12-1 to 12-3 purified in the septic tank 80 are introduced into the decomposition tank 10, respectively, by controlling valves 45-1 to 45-3.

[0191] The computing device 50 may calculate the decomposition condition Cb based on the components of the liquid 13 measured by each of the multiple decomposition liquid sensors 19. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 in each of the multiple decomposition tanks 10 becomes a predetermined concentration. The decomposition conditions Cb in each of the multiple decomposition tanks 10 may be different from each other. The administration device 40 may administer at least one of the decomposition liquid 12 and HO (water) to the cultivation target 92 based on the calculated decomposition condition Cb.

[0192] The computing device 50 may calculate the respective times at which the administration device 40 administers the decomposition solutions 12 produced in the plurality of decomposition tanks 10 to the cultivation target 92, based on the components of the respective liquids 13 measured by the respective decomposition solution sensors 19 in the plurality of decomposition tanks 10. The administration control device 46 may control the valve 47 so that the administration device 40 administers the decomposition solutions 12 to the cultivation target 92 at the respective times calculated by the computing device 50. The administration control device 46 may control the valve 45 so that the decomposition solutions 12 purified in the purification tank 80 are introduced into the decomposition tank 10 at the respective times calculated by the computing device 50.

[0193] 25 is a timing chart showing an example of the timing of administering the decomposition liquids 12-1 to 12-3 to the cultivation object 92. In this example, the decomposition liquid 12-1 is administered to the cultivation object 92 between time ta1 and time ta2, the decomposition liquid 12-2 is administered to the cultivation object 92 between time tb1 and time tb2, and the decomposition liquid 12-3 is administered to the cultivation object 92 between time tc1 and time tc2. The period between time ta1 and time ta2 is defined as period Tm1. The period between time tb1 and time tb2 is defined as period Tm2. The period between time tc1 and time tc2 is defined as period Tm3.

[0194] The growth state of the cultivation target 92 (see FIG. 24) measured by the growth state sensor 99 (see FIG. 24) is referred to as growth state Sg. The nutrient components of the decomposition liquid 12 (see FIG. 24) measured by the nutrient component sensor 42 (see FIG. 24) are referred to as nutrient components Cn. The nutrient components of the decomposition liquids 12-1 to 12-3 measured by the nutrient component sensor 42 are referred to as nutrient components Cn-1 to Cn-3, respectively.

[0195] The administration control device 46 (see FIG. 24) may control the administration device 40 based on at least one of the growth state Sg and the nutrient components Cn so that the time at which one decomposition liquid 12 is administered to the cultivation target 92 differs from the time at which another decomposition liquid 12 is administered to the cultivation target 92. In this example, the administration control device 46 controls the administration device 40 based on at least one of the growth state Sg and the nutrient components Cn so that the time Tm1, the time Tm2, ​​and the time Tm3 differ from one another.

[0196] The time Tm1, the time Tm2, ​​and the time Tm3 being different from one another may mean that the time Tm1, the time Tm2, ​​and the time Tm3 do not overlap one another, or may mean that the time Tm1, the time Tm2, ​​and the time Tm3 partially overlap one another, as shown in Fig. 25. For example, the time tb1 may be between the time ta1 and the time ta2, and the time tc1 may be between the time tb1 and the time tb2.

[0197] The periods Tm1 to Tm3 may be dates. As shown in Fig. 25, the administration control device 46 (see Fig. 24) may control the administration device 40 so that the decomposition liquid 12-1 is administered to the cultivation target 92 (see Fig. 24) on the first and fourth days, the decomposition liquid 12-2 is administered to the cultivation target 92 on the second and fifth days, and the decomposition liquid 12-3 is administered to the cultivation target 92 on the third and sixth days. The administration control device 46 may control the valves 45-1 to 45-3 so that the time when the administration device 40 administers one decomposition liquid 12 to the cultivation target 92 coincides with the time when the one decomposition liquid 12 is introduced into the decomposition tank 10.

[0198] The decomposition state of the organic matter 24 (see FIG. 24) in the multiple decomposition tanks 10 (i.e., the state of production of the decomposition solution 12) may differ between the decomposition tanks 10. For this reason, the administration control device 46 (see FIG. 24) varies the periods Tm1 to Tm3 based on at least one of the growth state Sg and the nutrient components Cn, which makes it easier for the administration device 40 to administer to the cultivation object 92 the decomposition solution 12 in a decomposition state appropriate for the growth state Sg or the nutrient components Cn.

[0199] The calculation device 50 may calculate, based on at least one of the growth state Sg and the nutritional components Cn, the time to administer one decomposition liquid 12 to the cultivation target 92 and the time to administer another decomposition liquid 12 to the cultivation target 92. The administration control device 46 may control the administration device 40 so that the administration device 40 administers the decomposition liquid 12 at the time to administer the one decomposition liquid 12 and the time to administer the other decomposition liquid 12 calculated by the calculation device 50.

[0200] When the dosing control device 46 (see FIG. 24) controls the dosing device 40 (see FIG. 24) so ​​as not to administer the decomposition liquid 12 produced in one decomposition tank 10 to the cultivation target 92 (see FIG. 24), the temperature control device 70 (see FIG. 24) may control the temperature of the liquid 13 in the one decomposition tank 10. In this example, for example, the temperature control device 70 controls the temperature of the liquid 13 in the one decomposition tank 10-1 at least one of the time periods Tm2 and Tm3 when the dosing control device 46 does not administer the decomposition liquid 12-1 produced in the one decomposition tank 10-1.

[0201] The decomposition state of the organic matter 24 (see FIG. 24) in the decomposition tank 10 may differ depending on the temperature of the liquid 13. The higher the temperature of the liquid 13, the easier it is to decompose the organic matter 24. For this reason, by using the temperature control device 70 (see FIG. 24) to control the temperature of the liquid 13 in one decomposition tank 10 during a period when the decomposition liquid 12 produced in that tank 10 is not administered to the cultivation target 92, the liquid 13 is more likely to reach a decomposition state appropriate for the growth state Sg or the nutrient components Cn during a period when the decomposition liquid 12 is administered.

[0202] When the administration control device 46 (see FIG. 24) controls the administration device 40 (see FIG. 24) so ​​as not to administer the decomposition solution 12 produced in one decomposition tank 10 to the cultivation target 92 (see FIG. 24), the fertilizer source administration device 20 (see FIG. 24) may administer the fertilizer source 22 to the liquid 13 in that one decomposition tank 10. The calculation device 50 (see FIG. 24) may calculate the timing and amount of the fertilizer source 22 to be administered by the fertilizer source administration device 20 to the liquid 13. By administering the fertilizer source 22 to the liquid 13 in that one decomposition tank 10 at a time when the decomposition solution 12 produced in that one decomposition tank 10 is not administered to the cultivation target 92, the liquid 13 is more likely to reach a decomposition state suitable for the growth state Sg or the nutrient components Cn at the time when the one decomposition solution 12 is administered.

[0203] When the administration control device 46 (see FIG. 24) controls the administration device 40 (see FIG. 24) to administer the decomposition solution 12 produced in one decomposition tank 10 to the cultivation target 92 (see FIG. 24), the fertilizer source administration device 20 (see FIG. 24) may add the fertilizer source 22 to the liquid 13 in the one decomposition tank 10. While the decomposition tank 10 is producing the decomposition solution 12 from the liquid 13, the produced decomposition solution 12 may be administered to the cultivation target 92.

[0204] The administration device 40 (see FIG. 24) may administer the decomposition liquid 12 produced in the plurality of decomposition tanks 10 (see FIG. 24) to the cultivation target 92 (see FIG. 24) based on the component Co of the liquid 13 measured by each of the plurality of decomposition liquid sensors 19 (see FIG. 24). The decomposition liquids 12 produced in the plurality of decomposition tanks 10 may be mixed in the decomposition liquid storage tank 30. The administration device 40 may administer the decomposition liquid 12 mixed in the decomposition liquid storage tank 30 to the cultivation target 92.

[0205] As shown in Figure 17, the ORP sensor 14 can measure the component Co of the liquid 13 by measuring the oxidation-reduction potential of the decomposition liquid 12. The DO sensor 15 can measure the component Co of the liquid 13 by measuring the dissolved oxygen concentration in the liquid 13. As shown in Figure 18, the pH sensor 16 can measure the component Co of the liquid 13 by measuring the pH of the liquid 13. The conductivity sensor 17 can measure the component Co of the liquid 13 by measuring the electrical conductivity of the liquid 13.

[0206] As described above, the decomposition state of the organic matter 24 (see FIG. 24 ) in the multiple decomposition tanks 10 (i.e., the state of production of the decomposition solution 12) may differ for each decomposition tank 10. Therefore, the component Co of each liquid 13 in the multiple decomposition tanks 10 may differ for each liquid 13. In this example, the administration device 40 administers the decomposition solution 12 to the cultivation target 92 based on the component Co of each of the multiple liquids 13. Therefore, the component Co of the decomposition solution obtained by mixing the multiple decomposition solutions 12 tends to become the component Co suitable for the growth state Sg or the nutrient component Cn.

[0207] The administration device 40 (see FIG. 24) may administer each decomposition liquid 12 to the cultivation target 92 (see FIG. 24) at the same time or at different times based on the components Co of the plurality of liquids 13. The administration device 40 administering the decomposition liquids 12 at different times means, for example, that the administration device 40 administers the decomposition liquids 12-1, 12-2, and 12-3 at different times.

[0208] The calculation device 50 (see FIG. 24) may calculate the mixing ratio of each of the multiple decomposition liquids 12 based on the component Co of the liquid 13 measured by each of the multiple decomposition liquid sensors 19 (see FIG. 24). The multiple decomposition liquids 12 may be mixed at that ratio in the decomposition liquid storage tank 30 (see FIG. 24). The administration device 40 may administer the decomposition liquid 12 mixed at the ratio calculated by the calculation device 50 to the cultivation target 92 (see FIG. 24).

[0209] 26 is a diagram showing another example of a cultivation apparatus 100 according to an embodiment of the present invention. In this example, the cultivation object 92 is placed in soil 91. In this example, the cultivation object 92 is not placed in the cultivation tank 90 (see FIG. 1). The cultivation apparatus 100 of this example does not include a septic tank 80. The cultivation apparatus 100 of this example differs from the cultivation apparatus 100 shown in FIG. 1 in these respects.

[0210] One direction in the soil 91 is the X-axis direction. A plane parallel to the soil 91 is the XY plane. A direction perpendicular to the X-axis and in the XY plane is the Y-axis direction. A direction perpendicular to the XY plane is the Z-axis direction. In this example, the XY plane is a horizontal plane. In this example, the Z-axis direction is a direction parallel to the vertical direction.

[0211] A plurality of pipes 48 are arranged above the soil 91. The pipes 48 are connected to the decomposition liquid storage tank 30. The plurality of pipes 48 may be arranged in the XY plane. The plurality of pipes 48 may be provided in the cultivation space 98 (see FIGS. 21 to 24). The pipes 48 are provided with an administration device 40.

[0212] Figure 27 is an enlarged view of the vicinity of the pipe 48 and the administration device 40 in Figure 26. Figure 27 is a view of the vicinity of one pipe 48 and one administration device 40 in Figure 26, viewed in the Y-axis direction. The pipe 48 may be provided above the soil 91. The administration device 40 is provided in the pipe 48. In this example, the administration device 40 administers the decomposition liquid 12 to the soil 91. The administration device 40 may administer the decomposition liquid 12 to the soil 91 from above the soil 91.

[0213] 28 is a flowchart showing an example of a cultivation method according to an embodiment of the present invention. The cultivation method according to an embodiment of the present invention will be described using the cultivation device 100 shown in FIG. 26 as an example.

[0214] The decomposition condition calculation step S100 is a step in which the calculation device 50 calculates the decomposition conditions Cb in the decomposition tank 10 based on a nutrient component profile Pf (see FIG. 2) that indicates components to be contained in the decomposition liquid 12. The nutrient component profile Pf is a profile of inorganic matter in the decomposition liquid 12. The nutrient component profile Pf may also include a profile of organic matter 24. The decomposition conditions Cb are conditions under which the decomposition tank 10 produces the decomposition liquid 12 in which a predetermined ratio of the organic matter 24 in the decomposition liquid 12 has been mineralized.

[0215] The decomposition step S102 is a step in which the decomposition tank 10 decomposes at least a portion of the organic matter 24 contained in the fertilizer source 22, thereby producing a decomposition solution 12 in which at least a portion of the organic matter 24 has been mineralized. The decomposition step S102 is a step in which the decomposition tank 10 produces the decomposition solution 12 based on the decomposition condition Cb.

[0216] The fertilizer source 22 is, for example, bonito soluble, corn steeping liquid, etc. When the fertilizer source 22 is bonito soluble, the organic matter 24 is bonito. When the fertilizer source 22 is corn steeping liquid, the organic matter 24 is corn. The liquid in which the organic matter 24 has been mineralized may refer to a liquid in which the organic matter 24 has been ammoniated, or may refer to a liquid in which the organic matter 24 has been nitrified (nitrified liquid).

[0217] The administration step S104 is a step in which the administration device 40 administers the decomposition liquid 12 generated in the decomposition step S102 to the cultivation object 92. The administration step S104 is a step in which the administration device 40 administers the decomposition liquid 12 generated based on the decomposition conditions Cb to the cultivation object 92. The decomposition liquid 12 contains nutrients for the growth of the cultivation object 92. The nutrients include N (nitrogen), H3PO4 (phosphate), K (potassium), etc. The cultivation object 92 may be placed in a cultivation tank 90 or in soil 91.

[0218] Fig. 29 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Fig. 28 in that it further includes a purification step S106 and a stop determination step S108. The cultivation method of this example will be described using the cultivation device 100 shown in Fig. 1 as an example.

[0219] The purification step S106 is a step in which the purification tank 80 purifies the decomposition liquid 12 administered to the cultivation tank 90 in the administration step S104. Purifying the decomposition liquid 12 refers to reducing the concentration of nitrate nitrogen in the decomposition liquid 12. Purifying the decomposition liquid 12 may also refer to removing components such as NaCl (sodium chloride) remaining in the decomposition liquid 12. The concentration of nitrate nitrogen in the decomposition liquid 12 may be adjusted by the purification tank 80. The concentration of NaCl (sodium chloride) in the decomposition liquid 12 may be adjusted by the purification tank 80. The decomposition liquid 12 purified by the purification tank 80 may be liquid 13.

[0220] The stop determination step S108 is a step in which the arithmetic device 50 determines whether or not it is necessary to stop the operation of the cultivation apparatus 100. The stop determination step S108 may be a step in which the arithmetic device 50 determines an abnormality in the cultivation apparatus 100. An abnormality in the cultivation apparatus 100 is, for example, an abnormal value of the concentration of the organic matter 24 in the decomposition tank 10. The stop determination step S108 may also be a step in which a user of the cultivation apparatus 100 determines whether or not to stop the cultivation apparatus 100.

[0221] If it is determined in the stop determination step S108 that the operation of the cultivation apparatus 100 needs to be stopped, the cultivation method stops the operation of the cultivation apparatus 100. If it is determined in the stop determination step S108 that the operation of the cultivation apparatus 100 does not need to be stopped, the cultivation method returns to the decomposition step S102. If the cultivation method returns to the decomposition step S102, in the decomposition step S102, the decomposition tank 10 may further decompose the decomposition liquid 12 purified in the purification step S106.

[0222] Figure 30 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Figure 29 in that it further includes an input step S80, a nutrient component profile calculation step S90, and a fertilizer source input step S96. The cultivation method of this example will be described using the cultivation device 100 shown in Figure 1 as an example.

[0223] The input step S80 is a step of inputting information about the cultivation object 92. The input step S80 may be a step in which a user of the cultivation device 100 inputs information about the cultivation object 92. The information about the cultivation object 92 may be information about at least one of the type of the cultivation object 92, the amount of the cultivation object 92, the season in which the cultivation object 92 is cultivated, and the area in which the cultivation object 92 is cultivated. The amount of the cultivation object 92 may be the mass of the cultivation object 92.

[0224] The nutritional component profile calculation step S90 is a step in which the arithmetic device 50 calculates the nutritional component profile Pf based on the information of the cultivation object 92 input in the input step S80. The nutritional component profile Pf may be input in the input step S80.

[0225] In this example, the decomposition condition calculation step S100 is a step in which the calculation device 50 calculates the concentration of inorganic substances in the decomposition solution 12 at a predetermined time tp as the decomposition condition Cb based on the nutrient profile Pf calculated in the nutrient profile calculation step S90. The time tp may be a period between time zero and time te shown in FIG. 2. The inorganic substances in the decomposition solution 12 are NO3 - (nitrate ion), NO2 - (nitrite ion) and NH4 + (ammonium ion).

[0226] The fertilizer source introduction step S96 is a step in which the fertilizer source introduction device 20 introduces the fertilizer source 22 into the liquid 13 based on the nutrient component profile Pf calculated in the nutrient component profile calculation step S90. The decomposition condition Cb may include at least one of the timing and the amount of the fertilizer source 22 introduced by the fertilizer source introduction device 20 into the liquid 13. The fertilizer source introduction step S96 may be a step in which the fertilizer source introduction device 20 introduces the fertilizer source 22 into the liquid 13 so that the concentration of inorganic substances in the decomposition liquid 12 becomes the concentration calculated in the decomposition condition calculation step S100 at the time tp.

[0227] Figure 31 is a flowchart showing an example of details of the steps between the nutrient component profile calculation step S90 and the decomposition step S102 in Figure 30. The cultivation method may further include a fertilizer source concentration calculation step S200, a determination step S202, a determination step S204, a concentration control step S206, a fertilizer source input step S208, and a fertilizer source input step S210. The cultivation method in Figure 31 will be described using the cultivation device 100 shown in Figure 15 as an example.

[0228] In the fertilizer source concentration calculation step S200, the calculation device 50 calculates the concentration Df of the fertilizer source 22 in the liquid 13 under the decomposition conditions Cd. In the determination step S202, the calculation device 50 determines whether the concentration of the fertilizer source 22 is equal to or greater than the first threshold value Rt1 and equal to or less than the second threshold value Rt2. If it is determined in the determination step S202 that the concentration of the fertilizer source 22 is equal to or greater than the first threshold value Rt1 and equal to or less than the second threshold value Rt2, the cultivation method proceeds to the concentration control step S206. If it is not determined in the determination step S202 that the concentration of the fertilizer source 22 is equal to or greater than the first threshold value Rt1 and equal to or less than the second threshold value Rt2, the cultivation method proceeds to the determination step S204.

[0229] The concentration control step S206 is a step in which the concentration control device 72 controls the concentration of the fertilizer source 22 in the liquid 13 based on the concentration of the fertilizer source 22 calculated in the fertilizer source concentration calculation step S200. The concentration control step S206 may be a step in which the concentration control device 72 controls the concentration of the fertilizer source 22 in the liquid 13 by controlling the fertilizer source dosing device 20. After the concentration control step S206, the cultivation method proceeds to the decomposition step S102.

[0230] In the determination step S204, the calculation device 50 determines whether the concentration of the fertilizer source 22 in the liquid 13 is less than the first threshold value Rt1. If it is determined in the determination step S204 that the concentration of the fertilizer source 22 is less than the first threshold value Rt1, the cultivation method proceeds to the fertilizer source input step S208. If it is not determined in the determination step S204 that the concentration of the fertilizer source 22 is less than the first threshold value Rt1, the cultivation method proceeds to the fertilizer source input step S210. If it is not determined in the determination step S204 that the concentration of the fertilizer source 22 is less than the first threshold value Rt1, the case where the concentration of the fertilizer source 22 exceeds the second threshold value Rt2.

[0231] The concentration control step S208 is a step in which the concentration control device 72 controls the concentration of the fertilizer source 22 in the liquid 13 so that the concentration of the fertilizer source 22 becomes equal to or greater than the first threshold value Rt1. The concentration control step S208 may be a step in which the concentration control device 72 controls the fertilizer source dosing device 20 so that the fertilizer source 22 is dosed into the liquid 13 in an amount that causes the concentration of the fertilizer source 22 to become equal to or greater than the first threshold value Rt1. This allows the active state of microorganisms in the liquid 13 to be maintained.

[0232] The concentration control step S210 is a step in which the concentration control device 72 controls the concentration of the fertilizer source 22 in the liquid 13 so that the concentration of the fertilizer source 22 becomes equal to or less than the second threshold value Rt2. The concentration control step S210 may be a step in which the concentration control device 72 controls the fertilizer source input device 20 so that the fertilizer source input device 20 inputs at least one of the fertilizer source 22 and H2O (water) into the liquid 13 in an amount that makes the concentration of the fertilizer source 22 become equal to or less than the second threshold value Rt2. This allows the active state of microorganisms in the liquid 13 to be maintained.

[0233] Figure 32 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Figure 30 in that it further includes an organic matter concentration measurement step S82, a temperature control step S84, a nutrient component profile correction step S92, a pH measurement step S93, and a conductivity measurement step S94. The cultivation method of this example will be described using the cultivation device 100 shown in Figure 15 as an example.

[0234] The organic substance concentration measuring step S82 is a step in which the organic substance sensor 11 measures the concentration of the organic substance 24 in the liquid 13. In the organic substance concentration measuring step S82, the concentration of the organic substance 24 may be calculated using Equation 3 or Equation 4 described above.

[0235] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the concentration of the organic matter 24 measured in the organic matter concentration measurement step S82. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration. The predetermined concentration of the organic matter 24 may differ for each type of cultivation target 92 (see FIG. 15).

[0236] The temperature control step S84 is a step in which the temperature control device 70 controls the temperature of the liquid 13. The temperature control step S84 may be a step in which the temperature control device 70 controls the temperature of the liquid 13 based on the concentration of the organic matter 24 measured in the organic matter concentration measurement step S82. The organic matter 24 introduced into the decomposition tank 10 is more likely to be mineralized by microorganisms more quickly when the temperature T is within a desired range than when the temperature T is outside the desired range. As described above, the temperature Ta may be a temperature T within the desired range. Therefore, by having the temperature control device 70 control the temperature of the liquid 13, a user of the cultivation method can control the concentration of the organic matter 24 in the decomposition liquid 12.

[0237] The nutrient component profile correction step S92 is a step in which the calculation device 50 corrects the nutrient component profile Pf based on the concentration of the organic matter 24 measured in the organic matter concentration measurement step S82. By correcting the nutrient component profile Pf based on the concentration of the organic matter 24, the nutrient component profile Pf can become a more accurate profile that reflects more accurate concentrations of inorganic substances.

[0238] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition conditions Cb based on the nutrient component profile Pf corrected in the nutrient component profile correction step S92. This may result in the decomposition conditions Cb being more accurate than when the decomposition conditions Cb are based on the nutrient component profile Pf before correction.

[0239] The pH measurement step S93 is a step in which the pH sensor 16 measures the pH of the liquid 13. As described above, the organic matter 24 reacts with NH4 + (ammonium ions), the pH of the liquid 13 increases.

[0240] The conductivity measurement step S94 is a step in which the conductivity sensor 17 measures the electrical conductivity of the liquid 13. As described above, the NH4 + (Ammonium ion) is converted by microorganisms into NO2 -(nitrite ion) + (Ammonium ion) is converted by microorganisms into NO2 - When decomposed into nitrite ions, the electrical conductivity of the decomposition solution 12 is likely to decrease compared to before the decomposition.

[0241] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the pH of the liquid 13 measured in the pH measurement step S93. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration.

[0242] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the electrical conductivity of the liquid 13 measured in the conductivity measurement step S94. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition liquid 12 becomes a predetermined concentration.

[0243] In the cultivation method shown in Figure 32, between the nutrient component profile calculation step S90 and the decomposition step S102, a fertilizer source concentration calculation step S200, a determination step S202, a determination step S204, a concentration control step S206, a fertilizer source input step S208, and a fertilizer source input step S210 shown in Figure 30 may be provided.

[0244] Figure 33 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Figure 32 in that it further includes an acquisition step S85, a temperature and humidity measurement step S86, a CO2 (carbon dioxide) concentration measurement step S87, a growth condition measurement step S88, a nutrient component measurement step S89, and a decomposition condition correction step S101. The cultivation method of this example will be described using the cultivation device 100 shown in Figure 23 as an example.

[0245] The acquisition step S85 is a step in which the acquisition device 97 acquires at least one of the amount of solar radiation and the duration of sunlight on the cultivation object 92. The temperature and humidity measurement step S86 is a step in which the temperature and humidity sensor 95 measures at least one of the temperature and humidity in the cultivation space 98. The CO2 (carbon dioxide) concentration measurement step S87 is a step in which the CO2 (carbon dioxide) sensor 96 measures the CO2 (carbon dioxide) concentration in the cultivation space 98.

[0246] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on at least one of the amount of solar radiation and the duration of sunlight on the cultivation target 92 acquired in the acquisition step S85. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration.

[0247] The nutrient component profile correcting step S92 may be a step in which the calculation device 50 corrects the nutrient component profile Pf based on at least one of the amount of solar radiation and the duration of sunlight on the cultivation object 92 acquired in the acquisition step S85. The decomposition condition correcting step S101 may be a step in which the calculation device 50 corrects the decomposition condition Cb based on at least one of the amount of solar radiation and the duration of sunlight on the cultivation object 92 acquired in the acquisition step S85.

[0248] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on at least one of the temperature and humidity of the cultivation space 98 measured in the temperature and humidity measurement step S86. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration.

[0249] The nutrient component profile correcting step S92 may be a step in which the calculation device 50 corrects the nutrient component profile Pf based on at least one of the temperature and humidity of the cultivation space 98 measured in the temperature and humidity measuring step S86. The decomposition condition correcting step S101 may be a step in which the calculation device 50 corrects the decomposition condition Cb based on at least one of the temperature and humidity of the cultivation space 98 measured in the temperature and humidity measuring step S86.

[0250] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the CO2 (carbon dioxide) concentration in the cultivation space 98 measured in the CO2 (carbon dioxide) concentration measurement step S87. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration.

[0251] The nutrient component profile correcting step S92 may be a step in which the calculation device 50 corrects the nutrient component profile Pf based on the CO2 (carbon dioxide) concentration in the cultivation space 98 measured in the CO2 (carbon dioxide) concentration measuring step S87. The decomposition condition correcting step S101 may be a step in which the calculation device 50 corrects the decomposition condition Cb based on the CO2 (carbon dioxide) concentration in the cultivation space 98 measured in the CO2 (carbon dioxide) concentration measuring step S87.

[0252] The growth state measurement step S88 is a step in which the growth state sensor 99 measures the growth state of the cultivation object 92. The growth state of the cultivation object 92 may be the height of the cultivation object 92. If the cultivation object 92 is a plant, the growth state of the cultivation object 92 may be the flowering state of the plant or the ripening state of the fruit of the plant. The growth state sensor 99 is, for example, a camera.

[0253] The decomposition condition calculation step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the growth state of the cultivation target 92 measured in the growth state measurement step S88. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration.

[0254] The nutrient component profile correcting step S92 may be a step in which the calculation device 50 corrects the nutrient component profile Pf based on the growth state of the cultivation object 92 measured in the growth state measuring step S88. The decomposition condition correcting step S101 may be a step in which the decomposition condition Cb is corrected based on the growth state of the cultivation object 92 measured in the growth state measuring step S88.

[0255] The nutrient component measuring step S89 is a step in which the nutrient component sensor 42 measures the nutrient components of the decomposition solution 12 administered to the cultivation target 92. The nutrient component sensor 42 may include at least one of a pH sensor 43 and a conductivity sensor 44. The decomposition condition calculating step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the nutrient components of the decomposition solution 12 measured in the nutrient component measuring step S89. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic matter 24 in the decomposition solution 12 becomes a predetermined concentration.

[0256] The nutrient component profile correcting step S92 may be a step in which the calculation device 50 corrects the nutrient component profile Pf based on the nutrient components of the decomposition solution 12 measured in the nutrient component measuring step S89. The decomposition condition correcting step S101 may be a step in which the calculation device 50 corrects the decomposition condition Cb based on the nutrient components of the decomposition solution 12 measured in the nutrient component measuring step S89.

[0257] The decomposition step S102 may be a step in which the decomposition tank 10 generates the decomposition solution 12 based on the decomposition conditions Cb corrected in the decomposition condition correction step S101. The administration step S104 may be a step in which the administration device 40 administers the decomposition solution 12 generated based on the corrected decomposition conditions Cb in the decomposition step S102 to the cultivation target 92.

[0258] In the cultivation method shown in Figure 33, between the nutrient component profile calculation step S90 and the decomposition step S102, a fertilizer source concentration calculation step S200, a determination step S202, a determination step S204, a concentration control step S206, a fertilizer source input step S208, and a fertilizer source input step S210 shown in Figure 30 may be provided.

[0259] Figure 34 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Figure 33 in that it further includes a decomposition liquid component measurement step S103. The cultivation method of this example will be described using the cultivation device 100 shown in Figure 24 as an example.

[0260] The decomposition liquid component measuring step S103 is a step in which the plurality of decomposition liquid sensors 19 measure the respective components of the plurality of liquids 13. The decomposition condition calculating step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb based on the respective components of the plurality of liquids 13 measured in the decomposition liquid component measuring step S103. The decomposition condition Cb may be a decomposition condition Cb under which the concentration of the organic substance 24 in the decomposition liquid 12 becomes a predetermined concentration. The decomposition condition calculating step S100 may be a step in which the arithmetic device 50 calculates the decomposition condition Cb under which the concentration of the organic substance 24 in the decomposition liquid 12 mixed in the decomposition liquid storage tank 30 becomes a predetermined concentration.

[0261] In the cultivation method shown in Figure 34, between the nutrient component profile calculation step S90 and the decomposition step S102, a fertilizer source concentration calculation step S200, a determination step S202, a determination step S204, a concentration control step S206, a fertilizer source input step S208, and a fertilizer source input step S210 shown in Figure 30 may be provided.

[0262] Figure 35 is a flowchart showing another example of a cultivation method according to an embodiment of the present invention. The cultivation method of this example differs from the cultivation method shown in Figure 34 in that it further includes an administration time calculation step S1031 and an administration control step S1032. The cultivation method of this example will be described using the cultivation device 100 shown in Figure 24 as an example.

[0263] The administration time calculation step S1031 is a step in which the arithmetic device 50 calculates the time when the administration device 40 administers each of the plurality of decomposition liquids 12 to the cultivation target 92, based on the components of each of the plurality of liquids 13 measured in the decomposition liquid component measurement step S103. The administration control step S1032 is a step in which the administration control device 46 controls the valve 47 so that the administration device 40 administers the decomposition liquid 12 to the cultivation target 92 at each of the times calculated in the administration time calculation step S1031.

[0264] The administration control step S1032 may be a step of controlling the administration device 40 based on at least one of the growth state of the cultivation target 92 measured in the growth state measurement step S88 and the nutrient components of the decomposition liquid 12 measured in the nutrient component measurement step S89, so that the time at which the administration device 40 administers one decomposition liquid 12 generated in the decomposition step S102 to the cultivation target 92 differs from the time at which the administration device 40 administers another decomposition liquid 12 to the cultivation target 92. In the example of Fig. 25, the administration control step S1032 is a step in which the administration control device 46 controls the administration device 40 based on at least one of the growth state Sg and the nutrient components Cn so that the times Tm1, Tm2, ​​and Tm3 are different from one another.

[0265] The dosing control step S1032 may be a step in which, when the dosing control device 46 controls the dosing device 40 so as not to administer the decomposition solution 12 produced in one decomposition tank 10 to the cultivation target 92, the temperature control device 70 controls the temperature of the liquid 13 in the one decomposition tank 10. In the example of FIG. 25 , the dosing control step S1032 is a step in which the temperature control device 70 controls the temperature of the liquid 13 in the one decomposition tank 10-1 at least one of the time periods Tm2 and Tm3 when the dosing control device 46 does not administer the decomposition solution 12-1 produced in the one decomposition tank 10-1. The dosing control step S1032 may be a step in which the fertilizer source input device 20 inputs the fertilizer source 22 into the liquid 13 in the one decomposition tank 10, when the dosing control device 46 controls the dosing device 40 so as not to administer the decomposition solution 12 produced in the one decomposition tank 10 to the cultivation target 92.

[0266] In the cultivation method shown in Figure 35, between the nutrient component profile calculation step S90 and the decomposition step S102, a fertilizer source concentration calculation step S200, a determination step S202, a determination step S204, a concentration control step S206, a fertilizer source input step S208, and a fertilizer source input step S210 shown in Figure 30 may be provided.

[0267] Various embodiments of the present invention may be described with reference to flowcharts and block diagrams. In various embodiments of the present invention, the blocks may represent (1) stages in a process where operations are performed or (2) sections of apparatus responsible for performing the operations.

[0268] Certain steps may be performed by dedicated circuitry, programmable circuitry, or a processor. Certain sections may be implemented by dedicated circuitry, programmable circuitry, or a processor. The programmable circuitry and the processor may be supplied with computer-readable instructions. The computer-readable instructions may be stored on a computer-readable medium.

[0269] The dedicated circuitry may include at least one of digital hardware circuitry and analog hardware circuitry. The dedicated circuitry may include at least one of integrated circuits (ICs) and discrete circuits. The programmable circuitry may include hardware circuits for logical AND, OR, XOR, NAND, NOR, or other logical operations. The programmable circuitry may include reconfigurable hardware circuits including flip-flops, registers, memory elements such as field programmable gate arrays (FPGAs), programmable logic arrays (PLAs), and the like.

[0270] The computer-readable medium may include any tangible device capable of storing instructions that are executed by a suitable device. By including the computer-readable medium as a tangible device, the computer-readable medium having instructions stored on the device comprises an article of manufacture containing instructions that can be executed to create means for performing the operations specified in the flowcharts or block diagrams.

[0271] The computer-readable medium may be, for example, an electronic storage medium, a magnetic storage medium, an optical storage medium, an electromagnetic storage medium, a semiconductor storage medium, etc. More specifically, the computer-readable medium may be, for example, a floppy disk, a diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an electrically erasable programmable read-only memory (EEPROM), a static random access memory (SRAM), a compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a Blu-ray (RTM) disk, a memory stick, an integrated circuit card, etc.

[0272] The computer-readable instructions may include any of assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, source code, and object code. The source code and object code may be written in any combination of one or more programming languages, including object-oriented programming languages ​​and conventional procedural programming languages. Object-oriented programming languages ​​may be, for example, Smalltalk®, JAVA®, C++, etc. Procedural programming languages ​​may be, for example, the "C" programming language.

[0273] The computer-readable instructions may be provided to a processor or programmable circuitry of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus locally or over a wide-area network (WAN) such as a local area network (LAN), the Internet, etc. The processor or programmable circuitry of the general-purpose computer, special-purpose computer, or other programmable data processing apparatus may execute the computer-readable instructions to create means for performing the operations specified in the flowcharts shown in Figures 28-35 or the block diagrams shown in Figures 1, 15, 21-24, or 26. The processor may be, for example, a computer processor, processing unit, microprocessor, digital signal processor, controller, microcontroller, etc.

[0274] Figure 36 is a diagram showing an example of a computer 2200 in which the cultivation apparatus 100 according to one embodiment of the present invention may be embodied in whole or in part. A program installed in the computer 2200 can cause the computer 2200 to perform operations associated with the cultivation apparatus 100 according to an embodiment of the present invention, or to function as one or more sections of the cultivation apparatus 100, or to perform the operations or one or more sections, or to perform each step of the cultivation method of the present invention (see Figures 28 to 35). The program can be executed by the CPU 2212 to cause the computer 2200 to perform specific operations associated with some or all of the blocks in the flowcharts (Figures 28 to 35) and block diagrams (Figures 1, 15, 21 to 24, or 26) described in this specification.

[0275] A program that allows the computer 2200 to perform operations associated with the cultivation apparatus 100 according to the embodiment of the present invention may be stored in the storage device 52 (see FIG. 15, 21 to 24, or 26). The arithmetic device 50 (see FIG. 15, 21 to 24, or 26) may have a processor. The processor is, for example, a CPU 2212.

[0276] The program that causes the computer 2200 to perform operations associated with the cultivation apparatus 100 according to the embodiment of the present invention causes the processor of the arithmetic device 50 to execute the following: the decomposition tank 10 decomposes at least a portion of the organic matter 24 contained in the fertilizer source 22, thereby generating a decomposition solution 12 in which at least a portion of the organic matter 24 has been mineralized. The program causes the processor to execute the following: the administration device 40 administers the decomposition solution 12 generated by the decomposition tank 10 to the cultivation target 92. The program causes the processor to calculate decomposition conditions Cb in the decomposition tank 10 based on a nutrient component profile Pf (see FIG. 2 ) that indicates components to be contained in the decomposition solution 12. The program causes the processor to execute the following: the decomposition tank 10 generates the decomposition solution 12 based on the decomposition conditions Cb. The program causes the processor to execute the following: the administration device 40 administers the decomposition solution 12 generated based on the decomposition conditions Cb to the cultivation target 92.

[0277] A computer 2200 according to one embodiment of the present invention includes a CPU 2212, a RAM 2214, a graphics controller 2216, and a display device 2218. The CPU 2212, the RAM 2214, the graphics controller 2216, and the display device 2218 are interconnected by a host controller 2210. The computer 2200 further includes input / output units such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive. The communication interface 2222, the hard disk drive 2224, the DVD-ROM drive 2226, and the IC card drive are connected to the host controller 2210 via an input / output controller 2220. The computer further includes legacy input / output units such as a ROM 2230 and a keyboard 2242. The ROM 2230, the keyboard 2242, and the like are connected to the input / output controller 2220 via an input / output chip 2240.

[0278] The CPU 2212 controls each unit by operating in accordance with programs stored in the ROM 2230 and the RAM 2214. The graphics controller 2216 acquires image data generated by the CPU 2212 into a frame buffer or the like provided in the RAM 2214 or into the RAM 2214, thereby causing the image data to be displayed on the display device 2218.

[0279] The communication interface 2222 communicates with other electronic devices via a network. The hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200. The DVD-ROM drive 2226 reads programs or data from the DVD-ROM 2201 and provides the read programs or data to the hard disk drive 2224 via the RAM 2214. The IC card drive reads programs and data from an IC card or writes programs and data to an IC card.

[0280] The ROM 2230 stores a boot program or the like that is executed by the computer 2200 upon activation, or a program that depends on the hardware of the computer 2200. The input / output chip 2240 may connect various input / output units to the input / output controller 2220 via a parallel port, a serial port, a keyboard port, a mouse port, or the like.

[0281] The programs are provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card. The programs are read from the computer-readable medium, installed in the hard disk drive 2224, RAM 2214, or ROM 2230, which are also examples of computer-readable media, and executed by the CPU 2212. Information processing described in these programs is read by the computer 2200, and brings about cooperation between the programs and the various types of hardware resources described above. An apparatus or method may be configured by realizing information manipulation or processing according to the use of the computer 2200.

[0282] For example, when communication is performed between the computer 2200 and an external device, the CPU 2212 may execute a communication program loaded into the RAM 2214 and instruct the communication interface 2222 to perform communication processing based on the processing described in the communication program. Under the control of the CPU 2212, the communication interface 2222 reads transmission data stored in a transmission buffer processing area provided in the RAM 2214, the hard disk drive 2224, the DVD-ROM 2201, or a recording medium such as an IC card, and transmits the read transmission data to the network, or writes reception data received from the network to a reception buffer processing area or the like provided on the recording medium.

[0283] The CPU 2212 may read all or a necessary portion of a file or database stored on an external recording medium such as the hard disk drive 2224, the DVD-ROM drive 2226 (DVD-ROM 2201), an IC card, etc. into the RAM 2214. The CPU 2212 may perform various types of processing on the data on the RAM 2214. The CPU 2212 may then write the processed data back to the external recording medium.

[0284] Various types of information, such as various types of programs, data, tables, and databases, may be stored on the recording medium and processed. The CPU 2212 may perform various types of processing on data read from the RAM 2214, including various types of operations, information processing, conditional decisions, conditional branches, unconditional branches, information search or replacement, etc., specified by the instruction sequences of the programs described in this disclosure. The CPU 2212 may write the results back to the RAM 2214.

[0285] CPU 2212 may search for information in a file, database, etc. in the recording medium. For example, if a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, CPU 2212 may search the plurality of entries for an entry that matches a condition specified by the attribute value of the first attribute, read the attribute value of the second attribute stored in the entry, and by reading the second attribute value, obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

[0286] The above-described programs or software modules may be stored on the computer 2200 or in a computer-readable medium of the computer 2200. A recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as the computer-readable medium. The programs may be provided to the computer 2200 by the recording medium.

[0287] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. It is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention.

[0288] It should be noted that the order of execution of each process, such as operations, procedures, steps, and stages, in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not specifically stated as "before," "prior to," etc., and that the processes can be performed in any order unless the output of a previous process is used in a subsequent process. Even if the operational flow in the claims, specifications, and drawings is described using "first," "next," etc. for convenience, this does not mean that the processes must be performed in this order. [Item 1] a decomposition tank for decomposing at least a portion of the organic matter contained in the fertilizer source to produce a decomposed solution in which at least a portion of the organic matter has been mineralized; an administration device that administers the decomposition solution produced in the decomposition tank to a cultivation target; a computing device that calculates decomposition conditions in the decomposition tank based on a nutrient component profile that indicates components to be contained in the decomposition solution; and Equipped with the decomposition tank generates the decomposition solution based on the decomposition conditions; The administration device administers the decomposition solution generated based on the decomposition conditions to the cultivation target. Cultivation equipment. [Item 2] the decomposition tank holds a liquid for producing the decomposition liquid; Item 1, further comprising a fertilizer source input device that inputs the fertilizer source into the liquid based on the nutrient component profile. [Item 3] The computing device calculates, as the decomposition condition, a concentration of inorganic substances in the decomposition solution at a predetermined time based on the nutrient component profile; The fertilizer source feeding device feeds the fertilizer source into the liquid at the time so that the concentration of inorganic substances in the decomposition liquid becomes the concentration of inorganic substances in the decomposition liquid calculated by the calculation device. Item 2. The cultivation device according to item 2. [Item 4] Item 4. The cultivation device according to item 3, wherein the calculation device calculates the decomposition conditions based on the nutrient component profile and the composition of the fertilizer source. [Item 5] 5. The cultivation device according to item 4, wherein the calculation device calculates the decomposition conditions based on the nutrient component profile and the mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source. [Item 6] Item 6. The cultivation device according to item 5, wherein the calculation device calculates a mixing ratio of one of the fertilizer sources to another of the fertilizer sources based on a mass ratio of carbon atoms to nitrogen atoms in each of the plurality of fertilizer sources, and calculates the decomposition condition based on the mixing ratio. [Item 7] a relationship between at least one of a temperature and a decomposition time of the liquid and a production amount of at least one of the inorganic substances is predetermined for each of the types or concentrations of the plurality of fertilizer sources; the calculation device calculates the decomposition condition based on the relationship. 7. The cultivation device according to any one of items 3 to 6. [Item 8] 8. The cultivation device according to any one of items 2 to 7, further comprising a temperature control device that controls the temperature of the liquid so that the concentration of inorganic substances in the decomposition liquid or the decomposition time of the liquid becomes a predetermined value. [Item 9] The computing device calculates a concentration of the fertilizer source in the liquid under the decomposition conditions, Further provided is a concentration control device that controls the concentration of the fertilizer source in the liquid based on the concentration of the fertilizer source calculated by the arithmetic device. The cultivation device according to any one of items 2 to 8. [Item 10] The computing device determines whether the concentration of the fertilizer source is equal to or greater than a first threshold value and equal to or less than a second threshold value; the concentration control device controls the concentration of the fertilizer source in the liquid when the calculation device determines that the concentration of the fertilizer source is equal to or greater than a first threshold value and equal to or less than a second threshold value; Item 10. The cultivation device according to item 9. [Item 11] 11. The cultivation device according to any one of items 2 to 10, wherein the arithmetic device calculates the decomposition conditions based on the concentration of the organic matter in the liquid measured by an organic matter sensor. [Item 12] Item 12. The cultivation device according to item 11, further comprising a temperature control device that controls the temperature of the liquid based on the concentration of the organic matter measured by the organic matter sensor. [Item 13] the computing device corrects the nutrient component profile based on the concentration of the organic matter in the liquid measured by the organic matter sensor, and calculates the decomposition conditions based on the corrected nutrient component profile. 11. The cultivation device according to any one of items 2 to 10. [Item 14] the computing device calculates the decomposition conditions based on the pH of the liquid measured by a pH sensor. 14. The cultivation device according to any one of items 2 to 13. [Item 15] the computing device calculates the decomposition conditions based on the electrical conductivity of the liquid measured by the electrical conductivity sensor. 15. The cultivation device according to any one of items 2 to 14. [Item 16] 16. The cultivation device according to any one of items 2 to 15, wherein the calculation device calculates the decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight acquired by an acquisition device that acquires at least one of the amount of solar radiation and the duration of sunlight on the cultivation target. [Item 17] Item 17. The cultivation device according to item 16, wherein the calculation device corrects at least one of the nutrient component profile and the decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device. [Item 18] The cultivation object is placed in a cultivation space, the calculation device calculates the decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by a temperature and humidity sensor that measures at least one of the temperature and humidity of the cultivation space; 18. The cultivation device according to any one of items 2 to 17. [Item 19] Item 19. The cultivation device according to item 18, wherein the arithmetic unit calculates the decomposition conditions based on the carbon dioxide concentration in the cultivation space measured by a carbon dioxide sensor that measures the carbon dioxide concentration in the cultivation space. [Item 20] Item 20. The cultivation device according to item 19, wherein the calculation device corrects at least one of the nutrient component profile and the decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by the temperature and humidity sensor and at least one of the carbon dioxide concentration of the cultivation space measured by the carbon dioxide sensor. [Item 21] The growth state of the cultivation object is measured by a growth state sensor, the arithmetic device calculates the decomposition conditions based on the growth state of the cultivation object measured by the growth state sensor. 21. The cultivation device according to any one of items 2 to 20. [Item 22] a nutrient component sensor measures the nutrient components of the decomposition solution administered to the cultivation target; the computing device calculates the decomposition conditions based on the nutritional components of the decomposition solution measured by the nutritional component sensor. Item 22. The cultivation device according to item 21. [Item 23] Item 23. The cultivation device according to item 22, wherein the calculation device corrects the decomposition conditions based on at least one of the growth state of the cultivation object and the nutritional components of the decomposition solution. [Item 24] Item 24. The cultivation device according to item 22 or 23, wherein the calculation device corrects the nutrient component profile based on at least one of the growth state of the cultivation object and the nutrient components of the decomposition solution. [Item 25] Item 25. The cultivation device according to item 24, wherein the calculation device corrects the decomposition conditions based on the corrected nutrient component profile. [Item 26] The administration device further includes an administration control device that controls the timing at which each of the decomposition solutions produced in the plurality of decomposition tanks is administered to the cultivation target, The administration control device controls the administration device based on at least one of the growth state of the cultivation target measured by the growth state sensor and the nutrient components of the decomposition solution measured by the nutrient component sensor so that the timing of administering one of the decomposition solutions produced in one of the decomposition tanks to the cultivation target differs from the timing of administering another of the decomposition solutions produced in another of the decomposition tanks to the cultivation target. 26. The cultivation device according to any one of items 22 to 25. [Item 27] a temperature control device for controlling the temperature of the liquid; When the administration control device controls the administration device so as not to administer the decomposition liquid produced in one of the decomposition tanks to the cultivation target, the temperature control device controls the temperature of the liquid in one of the decomposition tanks. Item 27. The cultivation device according to item 26. [Item 28] Each of the plurality of decomposition tanks is provided with a plurality of decomposition liquid sensors that measure components of the liquid; the computing device calculates the decomposition conditions based on the components of the liquid measured by each of the plurality of decomposition liquid sensors. 28. The cultivation device according to any one of items 2 to 27. [Item 29] the arithmetic device calculates the nutritional component profile based on information about the object to be cultivated input by an input device. 29. The cultivation device according to any one of items 1 to 28. [Item 30] The administration device administers the decomposition solution to a cultivation tank in which the cultivation object is cultivated, At least a portion of the decomposition solution that has passed through the cultivation tank is introduced into the decomposition tank. 30. The cultivation device according to any one of items 1 to 29. [Item 31] The decomposition solution administered to the cultivation tank is purified in a purification tank, At least a portion of the decomposition liquid purified in the purification tank is introduced into the decomposition tank. Item 31. The cultivation device according to item 30. [Item 32] The program includes a storage device storing the program and a computing device having a processor, the program causing the processor to: The decomposition tank decomposes at least a portion of the organic matter contained in the fertilizer source to generate a decomposed solution in which at least a portion of the organic matter has been mineralized; an administration device administering the decomposition solution produced in the decomposition tank to a cultivation target; the computing device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposition solution; the decomposition tank generates the decomposition solution based on the decomposition conditions; The administration device administers the decomposition solution generated based on the decomposition conditions to the cultivation target; A cultivation device that performs the above. [Item 33] a decomposition step in which a decomposition tank decomposes at least a portion of the organic matter contained in the fertilizer source to generate a decomposed solution in which at least a portion of the organic matter is mineralized; An administration step in which an administration device administers the decomposition solution produced in the decomposition step to a cultivation target; a decomposition condition calculation step in which a computing device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposition solution; Equipped with the decomposition step is a step in which the decomposition tank generates the decomposition solution based on the decomposition conditions, The administration step is a step in which the administration device administers the decomposition solution generated based on the decomposition conditions to the cultivation target. Cultivation method. [Item 34] A cultivation program for causing a computer to function as the cultivation device described in any one of items 1 to 31. [Explanation of symbols]

[0289] 10 digestion tank, 11 organic matter sensor, 12 digested liquid, 13 liquid, 14 ORP sensor, 15 sensor, 16 pH sensor, 17 conductivity sensor, 19 digested liquid sensor, 20 fertilizer source dosing device, 22 fertilizer source, 23 fertilizer source, 24 organic matter, 30 digested liquid storage tank, 40 dosing device, 42 nutrient component sensor , 43... pH sensor, 44... Conductivity sensor, 45... Valve, 46... Dosage control device, 47... Valve, 48... Piping, 50... Calculation device, 52... Memory device, 70... Temperature control device, 72... Concentration control device, 80... Septic tank, 90... Cultivation tank, 91... Soil, 92... Cultivation target, 93... Pyranometer, 94... Pyrometer, 95... Temperature and humidity Sensor, 96...CO2 (carbon dioxide) sensor, 97...acquisition device, 98...cultivation space, 99...growth state sensor, 100...cultivation device, 110...controller, 112...input device, 120...reference electrode, 122...liquid-contact electrode, 124...voltmeter, 2200...computer, 2201...DVD-ROM, 2210...host controller, 2212...CPU, 2214...RAM, 2216...graphics controller, 2218...display device, 2220...input / output controller, 2222...communication interface, 2224...hard disk drive, 2226...DVD-ROM drive, 2230...ROM, 2240...input / output chip, 2242...keyboard

Claims

1. a decomposition tank for decomposing at least a portion of the organic matter contained in the fertilizer source to produce a decomposed solution in which at least a portion of the organic matter has been mineralized; a computing device that calculates decomposition conditions in the decomposition tank based on a nutrient component profile that indicates components to be contained in the decomposition solution; and Equipped with the decomposition tank generates the decomposition solution based on the decomposition conditions; the decomposition tank holds a liquid for producing the decomposition liquid; and a fertilizer source dosing device for dosing the fertilizer source into the liquid based on the nutrient component profile. Decomposition liquid generation device.

2. The computing device calculates, as the decomposition condition, a concentration of inorganic substances in the decomposition solution at a predetermined time based on the nutrient component profile; The fertilizer source feeding device feeds the fertilizer source into the liquid at the time so that the concentration of inorganic substances in the decomposition liquid becomes the concentration of inorganic substances in the decomposition liquid calculated by the calculation device. The decomposition liquid generating device according to claim 1 .

3. The decomposition liquid generating device according to claim 2 , wherein the calculation device calculates the decomposition conditions based on the nutrient component profile and the composition of the fertilizer source.

4. The decomposition liquid generating device according to claim 3 , wherein the calculation device calculates the decomposition conditions based on the nutrient component profile and a mass ratio of carbon atoms to nitrogen atoms contained in the fertilizer source.

5. The decomposition liquid generating device according to claim 4, wherein the calculation device calculates a mixing ratio of one of the fertilizer sources to another of the fertilizer sources based on a mass ratio of carbon atoms to nitrogen atoms in each of the plurality of fertilizer sources, and calculates the decomposition conditions based on the mixing ratio.

6. a relationship between at least one of a temperature and a decomposition time of the liquid and a production amount of at least one of the inorganic substances is predetermined for each of the types or concentrations of the plurality of fertilizer sources; the calculation device calculates the decomposition condition based on the relationship. The decomposition liquid generating device according to any one of claims 2 to 5.

7. The decomposition liquid generating device according to claim 1 , further comprising a temperature control device that controls the temperature of the liquid so that the concentration of inorganic substances in the decomposition liquid or the decomposition time of the liquid becomes a predetermined value.

8. The computing device calculates a concentration of the fertilizer source in the liquid under the decomposition conditions, Further provided is a concentration control device that controls the concentration of the fertilizer source in the liquid based on the concentration of the fertilizer source calculated by the arithmetic device. The decomposition liquid generating device according to any one of claims 1 to 5.

9. The computing device determines whether the concentration of the fertilizer source is equal to or greater than a first threshold value and equal to or less than a second threshold value; the concentration control device controls the concentration of the fertilizer source in the liquid when the calculation device determines that the concentration of the fertilizer source is equal to or greater than a first threshold value and equal to or less than a second threshold value; The decomposition liquid generating device according to claim 8 .

10. The decomposition liquid generating device according to claim 1 , wherein the arithmetic unit calculates the decomposition conditions based on a concentration of the organic matter in the liquid measured by an organic matter sensor.

11. The decomposition liquid generating device according to claim 10 , further comprising a temperature control device that controls the temperature of the liquid based on the concentration of the organic matter measured by the organic matter sensor.

12. the computing device corrects the nutrient component profile based on the concentration of the organic matter in the liquid measured by the organic matter sensor, and calculates the decomposition conditions based on the corrected nutrient component profile. The decomposition liquid generating device according to any one of claims 1 to 5.

13. the computing device calculates the decomposition conditions based on the pH of the liquid measured by a pH sensor. The decomposition liquid generating device according to any one of claims 1 to 5.

14. the computing device calculates the decomposition conditions based on the electrical conductivity of the liquid measured by the electrical conductivity sensor. The decomposition liquid generating device according to any one of claims 1 to 5.

15. The decomposition liquid generating device according to any one of claims 1 to 5, wherein the calculation device calculates the decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight acquired by an acquisition device that acquires at least one of the amount of solar radiation and the duration of sunlight on the cultivation object.

16. The decomposition liquid generating device according to claim 15 , wherein the calculation device corrects at least one of the nutrient component profile and the decomposition conditions based on at least one of the amount of solar radiation and the duration of sunlight acquired by the acquisition device.

17. The cultivation target is placed in the cultivation space, the calculation device calculates the decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by a temperature and humidity sensor that measures at least one of the temperature and humidity of the cultivation space; The decomposition liquid generating device according to any one of claims 1 to 5.

18. The decomposition liquid generating device according to claim 17, wherein the arithmetic unit calculates the decomposition conditions based on a carbon dioxide concentration in the cultivation space measured by a carbon dioxide sensor that measures the carbon dioxide concentration in the cultivation space.

19. The decomposition liquid generating device of claim 18, wherein the calculation device corrects at least one of the nutrient component profile and the decomposition conditions based on at least one of the temperature and humidity of the cultivation space measured by the temperature and humidity sensor, and at least one of the carbon dioxide concentration of the cultivation space measured by the carbon dioxide sensor.

20. The growth status of the cultivated object is measured by a growth status sensor. the arithmetic device calculates the decomposition conditions based on the growth state of the cultivation object measured by the growth state sensor. The decomposition liquid generating device according to any one of claims 1 to 5.

21. a nutrient component sensor measures the nutrient components of the decomposition solution administered to the cultivation target; the computing device calculates the decomposition conditions based on the nutritional components of the decomposition solution measured by the nutritional component sensor. The decomposition liquid generating device according to claim 20.

22. The decomposition liquid generating device according to claim 21 , wherein the arithmetic unit corrects the decomposition conditions based on at least one of a growth state of the object to be cultivated and a nutrient component of the decomposition liquid.

23. The decomposition liquid generating device according to claim 21 , wherein the calculation device corrects the nutrient component profile based on at least one of a growth state of the cultivation object and the nutrient components of the decomposition liquid.

24. The decomposition liquid generating device according to claim 23 , wherein the calculation device corrects the decomposition conditions based on the corrected nutrient component profile.

25. Each of the plurality of decomposition tanks is provided with a plurality of decomposition liquid sensors that measure components of the liquid; the computing device calculates the decomposition conditions based on the components of the liquid measured by each of the plurality of decomposition liquid sensors. The decomposition liquid generating device according to any one of claims 1 to 5.

26. the calculation device calculates the nutritional component profile based on information about the cultivation target input by an input device. The decomposition liquid generating device according to any one of claims 1 to 5.

27. The decomposition liquid generating device according to any one of claims 1 to 5, an administration device that administers the decomposition solution produced in the decomposition tank to a cultivation target; and The administration device administers the decomposition solution generated based on the decomposition conditions to the cultivation target. Cultivation equipment.

28. The administration device further includes an administration control device that controls the timing at which each of the decomposition solutions produced in the plurality of decomposition tanks is administered to the cultivation target, The growth state of the cultivation object is measured by a growth state sensor, a nutrient component sensor measures the nutrient components of the decomposition solution administered to the cultivation target; The administration control device controls the administration device based on at least one of the growth state of the cultivation target measured by the growth state sensor and the nutrient components of the decomposition solution measured by the nutrient component sensor so that the timing of administering one of the decomposition solutions produced in one of the decomposition tanks to the cultivation target differs from the timing of administering another of the decomposition solutions produced in another of the decomposition tanks to the cultivation target. The cultivation device according to claim 27.

29. a temperature control device for controlling the temperature of the liquid for generating the decomposition liquid; When the administration control device controls the administration device so as not to administer the decomposition liquid produced in one of the decomposition tanks to the cultivation target, the temperature control device controls the temperature of the liquid in one of the decomposition tanks. The cultivation device according to claim 28.

30. The administration device administers the decomposition solution to a cultivation tank in which the cultivation object is cultivated, At least a portion of the decomposition solution that has passed through the cultivation tank is introduced into the decomposition tank. The cultivation device according to claim 27.

31. The decomposition solution administered to the cultivation tank is purified in a purification tank, At least a portion of the decomposition liquid purified in the purification tank is introduced into the decomposition tank. The cultivation device according to claim 30.

32. The program includes a storage device storing the program and a computing device having a processor, the program causing the processor to: A decomposition tank holding a liquid for generating a decomposition liquid decomposes at least a portion of the organic matter contained in the fertilizer source, thereby generating the decomposition liquid in which at least a portion of the organic matter has been mineralized; An administration device administers the decomposition solution produced in the decomposition tank to a cultivation target; the computing device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposition solution; the decomposition tank generates the decomposition solution based on the decomposition conditions; a fertilizer source dosing device dosing the fertilizer source into the liquid based on the nutrient component profile; A decomposition liquid generating device that performs the above.

33. A decomposition step in which a decomposition tank holding a liquid for producing a decomposition liquid decomposes at least a portion of the organic matter contained in the fertilizer source, thereby producing the decomposition liquid in which at least a portion of the organic matter has been mineralized; a decomposition condition calculation step in which a computing device calculates decomposition conditions in the decomposition tank based on a nutrient component profile indicating components to be contained in the decomposition solution; Equipped with the decomposition step is a step in which the decomposition tank generates the decomposition solution based on the decomposition conditions, The method further includes a step of adding the fertilizer source to the liquid based on the nutrient component profile. Decomposition liquid generation method.

34. A decomposition liquid generating program for causing a computer to function as the decomposition liquid generating device according to any one of claims 1 to 5.

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