Lightweight substrate cultivation gas fertilizer application control method, device and system

Abstract

The application provides a light-weight substrate cultivation gas fertilizer application control method, device and system, and belongs to the technical field of agricultural cultivation, and comprises the following steps: obtaining current environmental parameters of a cultivation facility, the environmental parameters comprising air temperature, atmospheric pressure and current gas fertilizer concentration; determining gas fertilizer density according to the environmental parameters and a preset gas fertilizer concentration; determining a target gas fertilizer supplement amount based on the gas fertilizer density, the volume of the cultivation facility and the gas fertilizer demand coefficient of target crops; applying gas fertilizer to the target crops according to the target gas fertilizer supplement amount; and the gas fertilizer is generated by fermentation of organic materials in the cultivation facility and is collected and stored in advance. The application collects and stores the gas fertilizer generated by fermentation in the cultivation facility, determines the amount of gas fertilizer that needs to be supplemented in real time according to the real-time air temperature, air pressure and gas fertilizer demand of crops, and applies the gas fertilizer, so that the cost can be reduced, the supply of gas fertilizer can be matched with the actual demand of crop growth, and resource waste can be reduced.

Description

Technical Field

[0001] This invention relates to the field of agricultural cultivation technology, and in particular to a method, apparatus and system for controlling the application of gas fertilizer in lightweight substrate cultivation. Background Technology

[0002] Substrate cultivation is a type of agricultural facility cultivation. Since crops grown in facilities are in a relatively closed environment for a long time, the proper application of carbon dioxide is an important factor affecting crop growth.

[0003] Currently, when supplementing carbon dioxide, the usual practice is to supply liquefied carbon dioxide to the cultivation facility through timed application.

[0004] However, this method of carbon dioxide supply has high input costs and does not match the demand patterns of crops, which can easily lead to waste of resources. Summary of the Invention

[0005] This invention provides a method, device, and system for controlling the application of gas fertilizer in lightweight substrate cultivation, which solves the defects of existing technologies such as high input cost of carbon dioxide supply, mismatch with crop demand patterns, and easy waste of resources. It achieves low-cost supply of gas fertilizer, on-demand matching with actual crop growth needs, and economical use of resources.

[0006] This invention provides a method for controlling the application of air fertilizer in lightweight substrate cultivation, comprising the following steps: Obtain the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current fertilizer concentration; The current gas fertilizer density is determined based on the current environmental parameters and the preset gas fertilizer concentration. Based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop, the target gas fertilizer supplementation amount is determined; Based on the target amount of gas fertilizer supplementation, the target crop is fertilized using gas fertilizer; The gas fertilizer is produced by fermentation of organic materials within the cultivation facility and is collected and stored in advance.

[0007] According to the present invention, a method for controlling the application of gas fertilizer in lightweight substrate cultivation, wherein determining the current gas fertilizer density based on the current environmental parameters and a preset gas fertilizer concentration includes: Obtain the concentration difference between the preset gas fertilizer concentration and the current gas fertilizer concentration; The temperature correction factor is determined based on the reference temperature constant and the air temperature. Based on the atmospheric pressure and the standard atmospheric pressure constant, determine the pressure correction coefficient; The current gas fertilizer density is determined based on the temperature correction coefficient, the gas pressure correction coefficient, and the concentration difference.

[0008] According to the method for controlling the application of air and fertilizer in lightweight substrate cultivation provided by the present invention, the current air and fertilizer density is calculated based on the following mathematical model: ; in, For the first i Heaven, the First j The current air-fertilizer density at any given moment. For the first i Heaven, the First j The air temperature at any given moment; For the first i Heaven, the First j Atmospheric pressure at any given moment; Preset the gas fertilizer concentration; For the first i Heaven, the First j The current concentration of fertilizer gas at any given moment.

[0009] According to the present invention, a method for controlling the application of gas fertilizer in lightweight substrate cultivation, wherein determining the target amount of gas fertilizer supplementation based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop includes: Obtain the current growth stage of the target crop; Based on the type of the target crop and its current growth stage, determine the gas and fertilizer requirement coefficient of the target crop; The target amount of supplemental gas fertilizer is determined based on the current gas fertilizer density, the volume of the cultivation facility, the gas fertilizer demand coefficient, and the preset gas fertilizer utilization coefficient.

[0010] According to the method for controlling the application of gas fertilizer in lightweight substrate cultivation provided by the present invention, the target amount of gas fertilizer supplementation is calculated based on the following mathematical model: ; in, For the first i Heaven, the First j The target amount of supplemental fertilizer at any given time. For the first i Heaven, the First j The current air-fertilizer density at any given moment. This is the gas fertilizer demand coefficient; The volume of the cultivation facility; ρ This is the gas fertilizer utilization coefficient.

[0011] According to the present invention, a method for controlling the application of gas fertilizer in lightweight substrate cultivation, wherein the step of applying gas fertilizer to the target crop according to the target gas fertilizer supplementation amount includes: Obtain the current storage amount of the gas fertilizer; Based on the preset gas-fertilizer replenishment coefficient and the current storage amount, the replenishment trigger threshold is determined; When the target amount of gas fertilizer is greater than or equal to the application trigger threshold, a command to open the output valve is sent to the gas storage device storing the gas fertilizer. When the amount of gas fertilizer released reaches the target amount of gas fertilizer supplementation, a command to close the output valve is sent to the gas storage device storing the gas fertilizer.

[0012] According to the present invention, a method for controlling the application of gaseous fertilizer in lightweight substrate cultivation is provided, wherein the gaseous fertilizer is pre-collected and stored through the following steps: Send a start command to the air extraction device to extract the gas fertilizer in the cultivation facility into the gas storage device; Send an opening command to the exhaust valve of the gas storage device to discharge the air in the gas storage device except for the gas fertilizer; After a preset time, a closing command is sent to the exhaust valve, and the current gas pressure value in the gas storage device is obtained; When the current air pressure value reaches the preset storage air pressure threshold, a stop command is sent to the air pumping device.

[0013] The present invention also provides an air-fertilizer application control device for lightweight substrate cultivation, comprising the following modules: The parameter acquisition module is used to acquire the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current fertilizer concentration. The density determination module is used to determine the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration. The supplementary application amount determination module is used to determine the target supplementary application amount of gas fertilizer based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop. The fertilization control module is used to fertilize the target crop with gaseous fertilizer according to the target amount of gaseous fertilizer supplementation; wherein the gaseous fertilizer is produced by fermentation of organic materials in the cultivation facility and collected and stored in advance.

[0014] This invention also provides an air-fertilizer application control system for lightweight substrate cultivation, comprising: The cultivation facility contains organic materials, which are used for fermentation to produce gas fertilizer. A gas storage device, connected to the cultivation facility, is used to store the gas fertilizer, and the gas storage device is equipped with an output valve; An air extraction device is connected to both the cultivation facility and the air storage device, and is used to extract the gas fertilizer from the cultivation facility into the air storage device. Monitoring equipment is used to collect current environmental parameters and the current gas pressure value inside the gas storage device; The controller is connected to the air extraction device, the output valve, and the monitoring device respectively, and is used to implement the gas fertilizer application control method for lightweight substrate cultivation as described above.

[0015] According to the present invention, a lightweight substrate cultivation gas fertilizer control system is provided, wherein the cultivation facility includes a cultivation trough, and a waste layer and a substrate layer are sequentially laid inside the cultivation trough from bottom to top, wherein the waste layer and the substrate layer constitute the organic material; A waterproof membrane covers the top of the substrate layer, and a sealing cover is provided on the top of the cultivation trough; an air collection chamber is formed between the waterproof membrane and the sealing cover, and the air inlet of the air extraction device is connected to the air collection chamber; The system also includes: A drip irrigation device, installed within the substrate layer, is used to deliver moisture to the organic material; An aeration device, installed within the waste layer, is used to supply oxygen to the organic material; The gas storage device is also equipped with an exhaust valve, which is connected to the controller and is used to discharge air other than the gas fertilizer from the gas storage device.

[0016] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the gas fertilizer control method for lightweight substrate cultivation as described above.

[0017] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the gas fertilizer application control method for lightweight substrate cultivation as described above.

[0018] The present invention also provides a computer program product, which, when executed by a processor, implements the gas fertilizer application control method for lightweight substrate cultivation as described above.

[0019] The present invention provides a method, apparatus and system for controlling the application of gas fertilizer in lightweight substrate cultivation. By collecting and storing the gas fertilizer produced by fermentation inside the cultivation facility, and determining the amount of gas fertilizer that needs to be supplemented based on real-time air temperature, air pressure and the gas fertilizer demand of the crop, the method can reduce costs, make the supply of gas fertilizer match the actual needs of crop growth and reduce resource waste. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is one of the flowcharts illustrating the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention.

[0022] Figure 2 This is a schematic diagram of the process for determining the current gas fertilizer density provided by the present invention.

[0023] Figure 3 This is a schematic diagram of the process for determining the target amount of supplemental gas fertilizer provided by the present invention.

[0024] Figure 4 This is the second flowchart of the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention.

[0025] Figure 5 This is the third flowchart of the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention.

[0026] Figure 6 This is one of the schematic diagrams of the lightweight facility substrate cultivation system provided by the present invention.

[0027] Figure 7 This is the second schematic diagram of the lightweight facility substrate cultivation system provided by the present invention.

[0028] Figure 8 This is a schematic diagram of the gas fertilizer application control device for lightweight substrate cultivation provided by the present invention.

[0029] Figure 9 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0030] Figure label: 1. Cultivation facility; 2. Gas storage device; 3. Monitoring device; 4. Controller; 5. Cultivation trough; 6. Aeration pipe; 7. Drip irrigation pipe; 8. Waterproof membrane; 9. Sealing cover; 10. Gas collection chamber; 11. Cultivation hole; 12. Air guide pipe; 13. Gas storage box; 14. Air pump; 15. Pressure air pump; 16. Exhaust valve; 17. Pressure detection device. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0032] It should be noted that, in the description of this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] The terms "upper," "lower," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in the invention can be understood according to the specific circumstances.

[0034] To facilitate a full understanding of the technical solution of this application, the following content is hereby introduced: In protected cultivation, crops are kept in a relatively closed environment for extended periods, and insufficient gaseous fertilizer (mainly carbon dioxide) is a significant factor affecting crop growth. Lightweight substrate cultivation is a cultivation model that uses agricultural and forestry waste as organic materials to replace part of the conventional substrate. During the decomposition and fermentation process, these organic materials release heat and gaseous fertilizer. However, in this model, the gaseous fertilizer mainly comes from crop respiration and organic material fermentation. Crop respiration primarily occurs at night, and the released gaseous fertilizer cannot be utilized by photosynthesis. Furthermore, the process of releasing gaseous fertilizer during organic material fermentation is greatly affected by the environment, resulting in unstable gas release rates. This leads to a mismatch between the natural release pattern of gaseous fertilizer and the actual needs of the crops, resulting in low utilization rates. In addition, current conventional methods of supplementing with purchased gaseous fertilizer suffer from high input costs and supply-demand imbalances under timed supply models, easily leading to resource waste.

[0035] Therefore, the present invention provides a method, device and system for controlling the application of gas fertilizer in lightweight substrate cultivation. By pre-collecting and storing the gas fertilizer produced by the fermentation of organic materials in the cultivation facility, and determining the amount of supplementary fertilizer to be applied according to the current environmental parameters and the gas fertilizer requirement coefficient of the target crop, the gas fertilizer can be recycled within the cultivation facility, reducing the input cost of gas fertilizer application, and making the supply of gas fertilizer more in line with the actual growth needs of the crop, thus reducing resource waste.

[0036] The following is combined Figures 1-9 This invention describes the gas fertilizer application control method, apparatus, and system for lightweight substrate cultivation provided by the present invention.

[0037] Figure 1 This is one of the flowcharts illustrating the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention, such as... Figure 1 As shown, the main body executing the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention can be a controller of the gas fertilizer application control system, a gas fertilizer application control device, or a computer capable of executing the method of the present invention, etc. Unless otherwise specified, the controller of the gas fertilizer application control system will be used as an example in the subsequent embodiments.

[0038] As an optional embodiment, the gas fertilization control method for lightweight substrate cultivation mainly includes, but is not limited to, the following steps: Step 110: Obtain the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current fertilizer concentration.

[0039] Cultivation facilities refer to agricultural facility spaces that provide a relatively enclosed growing environment for crops. For example, cultivation facilities can be cultivation greenhouses.

[0040] Current environmental parameters refer to various physical indicators collected in the real-time environmental space of crop growth. Typically, data can be collected at the crop canopy. For example, current environmental parameters could be the air temperature, atmospheric pressure, and carbon dioxide concentration values ​​actually measured by sensors at the height of the crop canopy at a certain time on a certain day after the crop is planted.

[0041] Gas fertilizer refers to gaseous fertilizer used to promote photosynthesis in crops. In this invention, it specifically refers to gas produced and pre-collected by the composting and fermentation of organic materials placed inside the cultivation facility and the respiration of crop roots. For example, gas fertilizer can be carbon dioxide gas released during the composting and fermentation of agricultural and forestry waste.

[0042] Step 120: Determine the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration.

[0043] The preset gas fertilizer concentration refers to the target value of gas fertilizer supply set in advance according to the type of cultivated crop. For example, when the cultivated crop is tomato, the preset gas fertilizer concentration can be set to 1000 to 1200 ppm, and when the cultivated crop is strawberry, the preset gas fertilizer concentration can be set to 800 to 1000 ppm.

[0044] Current air density refers to the mass of air distributed in a unit volume of air space under real-time air temperature and atmospheric pressure conditions. Since the volume of gas is affected by the temperature and pressure of the environment, using real-time temperature and pressure parameters to convert the air concentration at the density level can accurately reflect the true air density level in the current space. For example, current air density can be the actual number of grams of carbon dioxide per cubic meter of air calculated under specific temperature and pressure conditions.

[0045] Step 130: Determine the target amount of supplemental gas fertilizer based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop.

[0046] Target crops refer to crops that are actually planted inside cultivation facilities and used as the target of fertilization. For example, target crops can be fruit, berry, or leafy vegetable crops such as tomatoes, strawberries, or lettuce.

[0047] The gas fertilizer demand coefficient refers to a quantitative value that characterizes the strength of gas fertilizer absorption demand of different types of crops at different growth and development stages. Generally, the demand for gas fertilizer is higher during the vigorous growth period than during the stable growth period. For example, the value range of the gas fertilizer demand coefficient can be 0.6 to 1.5. Specifically, when the target crop is tomato, its gas fertilizer demand coefficient during the flowering period can be 1.1, and its gas fertilizer demand coefficient during the fruit setting period can be 1.4.

[0048] The target amount of gas fertilizer supplementation refers to the total mass of gas fertilizer supplementation calculated based on the size of the facility and the actual absorption capacity of the crop in order to achieve the target concentration of gas fertilizer in the cultivation facility. For example, the target amount of gas fertilizer supplementation can be the number of grams of carbon dioxide gas that actually needs to be supplemented into a greenhouse of a specific volume at a certain time.

[0049] Step 140: Apply gas fertilizer to the target crop according to the target amount of gas fertilizer supplementation; wherein, the gas fertilizer is produced by fermentation of organic materials in the cultivation facility and collected and stored in advance.

[0050] Organic materials refer to the medium materials laid inside cultivation facilities that can naturally release gas fertilizer through microbial degradation. For example, organic materials can be forest branches, crop straw, or agricultural and forestry waste such as vegetable waste. In addition, appropriate amounts of fermented organic fertilizer and microbial agents can be added to the waste to accelerate the fermentation process.

[0051] Specifically, based on the calculated target amount of gas fertilizer supplementation, a corresponding fertilization control command is generated to drive the gas storage equipment that stores gas fertilizer to transport the gas fertilizer collected inside to the crop's growing space. For example, an opening signal can be sent to the output valve of the gas storage equipment to allow the pressurized carbon dioxide gas stored in the equipment to flow into the crop's canopy space. When the gas release reaches the target amount of gas fertilizer supplementation, a closing signal is sent to the output valve to achieve on-demand quantitative supply of gas fertilizer.

[0052] The gas fertilizer application control method for lightweight substrate cultivation provided by this invention collects and stores the gas fertilizer produced by fermentation inside the cultivation facility, and determines the amount of gas fertilizer that needs to be supplemented based on real-time air temperature, air pressure and the gas fertilizer demand of the crop, and then applies the fertilizer accordingly. This reduces costs, makes the supply of gas fertilizer match the actual needs of crop growth, and reduces resource waste.

[0053] Figure 2 This is a schematic diagram of the process for determining the current gas fertilizer density provided by the present invention, as shown below. Figure 2 As shown, as another optional embodiment provided by the present invention, the current gas fertilizer density is determined based on the current environmental parameters and the preset gas fertilizer concentration, including but not limited to the following steps: Step 210: Obtain the concentration difference between the preset gas fertilizer concentration and the current gas fertilizer concentration.

[0054] Specifically, the pre-set target concentration of gas and fertilizer supply is subtracted from the current gas and fertilizer concentration monitored in real time to obtain the difference between the two. This concentration difference directly reflects the extent of gas and fertilizer deficiency in the crop canopy space inside the cultivation facility. For example, when the cultivated crop is tomato, the preset gas and fertilizer concentration is 1000 ppm, and the actual measured current gas and fertilizer concentration in the crop canopy is 650 ppm, the obtained concentration difference can be 350 ppm.

[0055] Step 220: Determine the temperature correction factor based on the reference temperature constant and the air temperature.

[0056] The reference temperature constant refers to the reference temperature value under thermodynamic standard conditions. Since gases have the property of thermal expansion and contraction, an increase in ambient temperature will cause the gas in a unit volume to expand and become rarefied. Therefore, by using the reference temperature constant and the real-time air temperature to establish a ratio relationship, the deviation caused by temperature fluctuations in the conversion of gas density can be eliminated. For example, the value of the reference temperature constant can be 273. Combined with the measured air temperature, the expression for the temperature correction coefficient can be 273 divided by the sum of 273 and the real-time air temperature.

[0057] Step 230: Determine the pressure correction coefficient based on atmospheric pressure and the standard atmospheric pressure constant.

[0058] Specifically, the measured real-time atmospheric pressure value is compared with the standard atmospheric pressure constant to obtain the pressure correction parameter. Since changes in ambient air pressure affect the degree of gas concentration under pressure, introducing this correction parameter can compensate for the estimation error of gas density caused by geographical altitude or weather pressure. For example, the standard atmospheric pressure constant can be 101325 Pa. The value obtained by dividing the actual measured atmospheric pressure by 101325 is the pressure correction coefficient.

[0059] Step 240: Determine the current gas fertilizer density based on the temperature correction coefficient, the gas pressure correction coefficient, and the concentration difference.

[0060] Specifically, the current gas fertilizer density can be calculated based on the following mathematical model: ; in, For the first i Heaven, the First j Current gas density at any given time, expressed in milligrams per cubic meter (mg / m³). 3 ), For the first i Heaven, the First j The air temperature at any given time, expressed in degrees Celsius (°C). For the first i Heaven, the First j Atmospheric pressure at any given time, measured in Pascals (Pa). The preset concentration of gaseous fertilizer is expressed in parts per million (ppm). For the first i Heaven, the First j The current concentration of carbon dioxide at any given time is expressed in parts per million (ppm); the constant 1.96 is the density conversion factor for carbon dioxide under standard conditions, expressed in mg / (m³). 3 ·ppm); 273 is the numerical constant of Celsius corresponding to absolute zero, in degrees Celsius (°C); 101325 is the standard atmospheric pressure constant, in Pascals (Pa).

[0061] It should be noted that the main function of this mathematical model in this technical solution is to achieve a precise physical conversion of the demand for gaseous fertilizer (carbon dioxide) from volume concentration difference to absolute mass density. Since the valve ultimately releases the actual mass of gas, the mathematical model converts the difference between the target concentration and the current concentration, combined with real-time temperature and pressure correction coefficients, into the actual missing mass of gaseous fertilizer per unit volume under the current environmental conditions.

[0062] Temperature and air pressure inside cultivation facilities (such as greenhouses) fluctuate significantly with day-night cycles and weather changes. The thermal expansion and contraction properties of gases can lead to deviations in the actual gas mass at the same concentration. This mathematical model effectively eliminates the interference caused by environmental temperature and pressure fluctuations in gas density estimation, ensuring that the calculated gas fertilizer density objectively and accurately reflects the missing gas fertilizer mass in the space. This provides a reliable data foundation for subsequent accurate calculation of the total supplemental application amount, avoiding excessive waste or insufficient supply caused by traditional extensive fertilization, and achieving precise on-demand control of gas fertilizer application.

[0063] The gas fertilizer application control method for lightweight substrate cultivation provided by this invention introduces a temperature correction coefficient determined by air temperature and a reference temperature constant, and a pressure correction coefficient determined by atmospheric pressure and a standard atmospheric pressure constant, to perform temperature and pressure conversion on the concentration difference of gas fertilizer. This can eliminate the interference caused by temperature fluctuations and pressure fluctuations in the cultivation facility on the gas volume, so that the calculated gas fertilizer density objectively reflects the true mass of gas fertilizer missing in a unit volume of air.

[0064] Figure 3 This is a schematic diagram of the process for determining the target amount of supplemental fertilizer provided by the present invention, such as... Figure 3 As shown, as another optional embodiment provided by the present invention, the target amount of supplemental gas fertilizer is determined based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop, including but not limited to the following steps: Step 310: Obtain the current growth stage of the target crop.

[0065] The current growth stage refers to the specific physiological period in which a crop is growing and developing. For example, the current growth stage could be the flowering period or the fruit setting period of crops such as tomatoes.

[0066] Step 320: Determine the gas and fertilizer demand coefficient of the target crop based on the type of the target crop and its current growth stage.

[0067] The gas-fertilizer demand coefficient refers to the proportional value that reflects the adjustment ratio of the amount of gas and fertilizer required by a specific crop at a specific growth stage. This value is related to the crop type and growth stage. For example, the gas-fertilizer demand coefficient of fruit vegetables is greater than that of leafy vegetables and berry crops. For the same crop, the gas-fertilizer demand coefficient during the fruit setting period is greater than that during the flowering period. Specifically, the value of the gas-fertilizer demand coefficient can be between 0.6 and 1.5. When the target crop is tomato, its gas-fertilizer demand coefficient during the flowering period can be 1.1, and its gas-fertilizer demand coefficient during the fruit setting period can be 1.4. This value is obtained by setting different gas-fertilizer supply gradients in experiments and fitting the experimental data to the equation.

[0068] Step 330: Determine the target amount of supplemental gas fertilizer based on the current gas fertilizer density, the volume of the cultivation facility, the gas fertilizer demand coefficient, and the preset gas fertilizer utilization coefficient.

[0069] The gas fertilizer utilization coefficient refers to a parameter that characterizes the actual absorption and utilization efficiency of gas fertilizer. Considering that gas will be naturally lost during spatial diffusion, this coefficient can compensate for the gap caused by the fact that the gas fertilizer is not fully absorbed by the crop. For example, the gas fertilizer utilization coefficient can be a value less than or equal to 1, and the specific value can be 0.9.

[0070] The target amount of gas fertilizer supplementation refers to the final calculated amount of gas fertilizer supplementation after comprehensively considering the density of gas fertilizer missing in space, the size of the facility space, the physiological fertilizer requirements of crops, and diffusion loss. For example, the target amount of gas fertilizer supplementation can be the number of grams of carbon dioxide gas actually supplemented into a specific volume of greenhouse space.

[0071] As an optional implementation, the target amount of gaseous fertilizer supplementation can be calculated based on the following mathematical model: ; in, For the first i Heaven, the First j The target amount of supplemental fertilizer at any given time is expressed in milligrams (mg). For the first i Heaven, the First j Current gas density at any given time, expressed in milligrams per cubic meter (mg / m³). 3 ), This is the gas fertilizer demand coefficient. The volume of the cultivation facility is expressed in cubic meters (m³). 3 ), ρ is the gas fertilizer utilization coefficient, and is a dimensionless coefficient.

[0072] It should be noted that the method for determining the gas fertilizer demand coefficient is as follows: In a standard experimental greenhouse, different concentration gradients of carbon dioxide supply groups are set up, and the net photosynthetic rate and dry matter accumulation of the target crop at specific growth stages (such as flowering and fruit setting stages) are measured to plot the carbon dioxide response curve. The carbon dioxide demand at the point where the maximum net photosynthetic rate is reached (85%~95%) is selected, and its ratio is calculated with the carbon dioxide demand during the crop's stable growth period (baseline period). The resulting ratio is the gas fertilizer demand coefficient for the corresponding growth stage.

[0073] The method for determining the gas-fertilizer utilization coefficient is as follows: A known initial concentration of carbon dioxide gas is released into the cultivation facility. With all vents closed, the decrease in gas concentration per unit time due to spatial diffusion and leakage through gaps is recorded. (Gas-fertilizer utilization coefficient) ρ=1 - (Gas loss due to leakage per unit time / Total gas supply). This gas-fertilizer utilization coefficient can be calibrated by actual measurement based on the sealing level of the cultivation facility (e.g., 0.95 for glass greenhouses with good sealing, and 0.85 for film greenhouses with average sealing).

[0074] Traditional carbon dioxide supplementation often uses fixed thresholds, ignoring the dynamic needs of crop growth and the actual sealing conditions of greenhouses. This new formula introduces two key correction coefficients—a gas fertilizer demand coefficient and a gas fertilizer utilization coefficient—ensuring that the calculated supplementation amount accurately reflects the target crop's current physiological nutrient requirements (avoiding insufficient gas supply during vigorous growth periods or excessive gas supply during stable growth periods) while also overcoming the problem of substandard concentrations caused by gas escape in actual cultivation environments. This not only ensures that the gas fertilizer concentration in the crop canopy accurately reaches the preset target, maximizing photosynthesis, but also avoids resource waste caused by blindly applying excessive fertilizer.

[0075] The gas fertilizer application control method for lightweight substrate cultivation provided by this invention determines the corresponding gas fertilizer demand coefficient by obtaining the current growth stage of the target crop, and introduces a preset gas fertilizer utilization coefficient to participate in the calculation of the target gas fertilizer supplementation amount. This enables the calculation of the supplementation amount to take into account the differences in metabolic absorption of crops at different physiological development stages and the loss of gas during spatial diffusion, avoiding the estimation deviation of fertilizer amount caused by ignoring changes in growth stage or spatial loss.

[0076] In another embodiment of the present invention, fertilizing a target crop with gas fertilizer according to a target gas fertilizer supplementation amount includes: obtaining the current storage amount of gas fertilizer; determining a supplementation trigger threshold based on a preset gas fertilizer supplementation coefficient and the current storage amount; sending an instruction to open the output valve to the gas storage device storing gas fertilizer when the target gas fertilizer supplementation amount is greater than or equal to the supplementation trigger threshold; and sending an instruction to close the output valve to the gas storage device storing gas fertilizer when the gas fertilizer release amount reaches the target gas fertilizer supplementation amount.

[0077] The gas-fertilizer supply coefficient refers to the adjustment multiple value set in advance to avoid frequent opening of the valve to replenish trace amounts of gas. The value of this coefficient is greater than or equal to 1. For example, the gas-fertilizer supply coefficient can be selected as an integer value such as 1, 2 or 3.

[0078] The supplementary application trigger threshold refers to the judgment standard value obtained by multiplying the gas fertilizer supply coefficient by the actual amount of gas fertilizer stored in the gas storage equipment. Gas release is only allowed when the calculated fertilizer requirement reaches this standard. For example, when the actual amount of carbon dioxide stored in the pressure tank is 100 grams and the set supply coefficient is 2, the calculated supplementary application trigger threshold is 200 grams.

[0079] Specifically, the total amount of gas fertilizer currently collected and stored in the pressure-resistant box inside the gas storage device is obtained in real time. This amount is multiplied by the set gas fertilizer replenishment coefficient to obtain the trigger standard line. Then, the target gas fertilizer replenishment amount calculated above is compared with the standard line. When the target replenishment amount reaches or exceeds the standard line, an opening command is sent to the output valve of the gas storage device to release the pressurized gas fertilizer stored in the box into the crop growth space. When the cumulative amount of gas released reaches the target replenishment amount, a valve closing command is sent. For example, when the amount of carbon dioxide replenishment required by the greenhouse is greater than or equal to the trigger threshold, a command is issued to power on and open the valve. After the gas supply reaches the target amount in grams, a command is automatically issued to power off and close the valve.

[0080] As an optional implementation, supplemental application of carbon dioxide fertilizer is initiated when the following conditions are met: ; in, For the first i Heaven, the First j The target amount of supplemental fertilizer at any given time is expressed in milligrams (mg). α Here, is the carbon dioxide replenishment coefficient, where α ≥1, M Ag The amount of carbon dioxide stored in the pressure-resistant enclosure.

[0081] The method for determining the carbon dioxide replenishment coefficient is as follows: First, based on the minimum concentration increment required for the target crop to produce an effective photosynthetic response (e.g., 50 ppm) and the volume of the cultivation facility, calculate the minimum gas mass required for a single effective fertilization. Then, calculate the ratio of this minimum gas mass to the current actual storage capacity of the gas storage device, and round up to obtain the carbon dioxide replenishment coefficient (an integer greater than or equal to 1, such as 1, 2, 3, etc.). The purpose of introducing this carbon dioxide replenishment coefficient is that when the volume of the cultivation facility is large, the trace amount of gas released will be diluted by the large space and cannot reach an effective concentration. Therefore, a larger replenishment coefficient (e.g., 2 or 3) is required to force the system to trigger the valve to open only when the target replenishment amount (fertilizer requirement) accumulates to several times the storage capacity, thereby ensuring that each fertilization can form an effective concentration in the canopy and avoiding ineffective and frequent mechanical start-stop of the solenoid valve due to responding to small fertilizer requirements.

[0082] The gas fertilizer application control method for lightweight substrate cultivation provided by this invention determines the supplementation trigger threshold by obtaining the current storage amount of gas fertilizer and combining it with a preset gas fertilizer supply coefficient. Only when the target supplementation amount reaches the threshold is an instruction issued to drive the valve to open and release gas, and when the gas release amount reaches the target supplementation amount, a valve closing instruction is issued in a timely manner. This can avoid the output valve of the gas storage device from frequently starting and stopping mechanically to cope with the small amount of gas fertilizer demand, reduce the operating wear of hardware equipment, and ensure the quantitative accuracy of each fertilization process.

[0083] In another embodiment of the present invention, the gas fertilizer is pre-collected and stored through the following steps: sending a start command to the air extraction device to extract the gas fertilizer from the cultivation facility into the gas storage device; sending an open command to the exhaust valve of the gas storage device to discharge the air in the gas storage device except for the gas fertilizer; after a preset time, sending a close command to the exhaust valve and obtaining the current air pressure value in the gas storage device; when the current air pressure value reaches a preset storage air pressure threshold, sending a stop command to the air extraction device.

[0084] Specifically, because the carbon dioxide and other gaseous fertilizers produced during fermentation inside the cultivation facility are denser than air, when the extraction equipment continuously pumps the mixed gas into the gas storage device, the gaseous fertilizers naturally settle and deposit at the bottom of the storage device, while the relatively lighter ordinary air is pushed upwards and flows out through the open exhaust valve. This density difference allows for the physical purification of the gaseous fertilizers within the storage device. After the exhaust valve is closed, the extraction equipment continues to pump gas into the storage device to pressurize it until the internal pressure reaches the set safe storage limit.

[0085] For example, an operating command is issued to a pressure pump, which acts as an extraction device, to draw the gas accumulated in the cultivation facility into a gas storage tank, which acts as a storage device. Simultaneously, the exhaust valve on the tank is opened, allowing the carbon dioxide gas deposited at the bottom of the tank to directly push out the original air in the tank through the exhaust valve. After a period of purification and exhaust time, a command is issued to close the exhaust valve. Subsequently, the pressure pump continues to pressurize the gas into the tank and reads the value of the pressure monitoring device on the tank in real time. When the read gas pressure value reaches the set storage gas pressure threshold, a stop command is issued to shut down the machine. The storage gas pressure threshold can be less than or equal to 2 MPa, thereby achieving safe and short-term storage of high-purity carbon dioxide gas.

[0086] As an optional embodiment, the collected gaseous fertilizer during substrate cultivation is stored in a dedicated pressure-resistant container. To accommodate the gas storage requirements of cultivation facilities of different sizes, multiple dedicated pressure-resistant containers can be installed. Furthermore, the amount of gaseous fertilizer stored in a single dedicated pressure-resistant container is calculated using the following formula: ; in, M b for b The amount of gas fertilizer stored in a single dedicated pressure-resistant box at any given time, expressed in grams (g). P b for b The pressure inside a single dedicated pressure-resistant chamber at any given time, measured in Pascals (Pa). T b for bThe temperature inside a single dedicated pressure-resistant chamber at any given time, expressed in degrees Celsius (°C). V A Special pressure-resistant enclosure A The volume, in cubic meters (m³) 3 ), f(x) It is a function of the equation.

[0087] Equation Function f(x) Specifically, the mass calculation formula is derived based on the ideal gas law: ; in, This represents the molar mass of carbon dioxide, with a constant value of 44 g / mol. is the ideal gas constant, with a value of 8.314 J / (mol·K), and 273.15 is the constant for the conversion of Celsius (°C) to Kelvin (K).

[0088] Specifically, by using sensors to obtain the actual pressure and temperature inside the pressure-resistant chamber at a certain moment, and combining this with the volume of the chamber itself, the mass of gas fertilizer currently stored inside the chamber can be determined using the above equation function, making it convenient to check the bottom storage data at any time when replenishing gas fertilizer.

[0089] The gas fertilizer control method for lightweight substrate cultivation provided by this invention extracts gas fertilizer from the cultivation facility into a gas storage device by controlling the gas extraction device, opens the exhaust valve to discharge ordinary air from the gas storage device, and automatically stops the gas extraction when the internal gas pressure reaches the storage threshold. This method can achieve preliminary purification of the collected gas fertilizer, improve the actual fertilizer purity of the gas stored in the gas storage device, and ensure the safety of the pressurized storage process of gas fertilizer.

[0090] Figure 4 This is the second flowchart illustrating the gas and fertilizer application control method for lightweight substrate cultivation provided by the present invention, as shown below. Figure 4 As shown, step S11 is executed first to determine the amount of organic material to be added for lightweight facility substrate cultivation. Specifically, based on the specific dimensions of the cultivation facility and the actual crop species being planted, the amount and ratio of organic material to be laid in the cultivation trough are calculated. This organic material consists of the bottom layer of agricultural and forestry waste and the top layer of conventional organic cultivation substrate.

[0091] It should be noted that, when determining the amount of organic material to be added in step S11, preferably, historical data can be used to fit the amount and proportion of organic material to be added through multi-objective optimization. This method can achieve both high-quality and high-yield crops, and ensure that the amount of carbon dioxide generated during the cultivation of lightweight facility substrates can meet the crop's growth requirements for gas fertilizer.

[0092] After the materials are laid and planted, step S12 is executed to collect and store carbon dioxide gas generated during the lightweight substrate cultivation process. During the crop's daily growth and material decomposition, an air pump actively extracts carbon dioxide gas continuously released by crop root respiration and the fermentation of agricultural and forestry waste, and stores it inside a dedicated pressure-resistant container. In the fertilization determination stage, step S13 is executed. Based on crop canopy environmental data, the carbon dioxide density is determined. Real-time air temperature, atmospheric pressure, and carbon dioxide concentration values ​​at the crop canopy height inside the cultivation facility are collected and converted into the actual carbon dioxide mass distribution density per unit volume of air in the current space using a state constant. Then, step S14 is executed to calculate the carbon dioxide supplementation amount based on the greenhouse volume. Combining the internal space volume of the cultivation facility with the gas and fertilizer requirement coefficient of the target crop's growth stage, the number of grams of carbon dioxide missing to achieve the required gas and fertilizer levels in the space is calculated.

[0093] Finally, step S15 is executed. According to the set conditions, a quantitative amount of carbon dioxide is applied. The calculated amount of application is compared with the trigger limit value calculated based on the bottom storage of the pressure tank. When the amount of application is greater than or equal to the limit value, a valve opening command is generated to drive the output valve on the gas storage device to release gas. When the cumulative release reaches the amount of application, a valve closing command is generated to cut off the power and close the circuit. In this way, the material cycle of in-situ fermentation of organic waste to produce gas and on-demand feeding of gas fertilizer is completed inside the cultivation facility.

[0094] Figure 5 This is the third flowchart of the gas fertilizer application control method for lightweight substrate cultivation provided by the present invention, as shown below. Figure 5 As shown, first, step S21 is performed to add organic materials and plant crops. The amount of organic materials to be added is determined according to the volume of the cultivation trough inside the cultivation facility. Specifically, straw, vegetable waste, and other waste are laid in the bottom space of the cultivation trough, and conventional organic cultivation substrate is laid on top of the waste layer. The height of the bottom waste layer is controlled to not exceed 1 / 2 of the total height of the cultivation trough. Then, the crops are planted in the cultivation holes at the top of the cultivation trough, and the cultivation holes are covered with a film.

[0095] After the materials are laid and planted, proceed to step S22 and start irrigation. Irrigation water enters the cultivation substrate layer through the seepage pipe. Control the operation of the seepage irrigation equipment installed inside the substrate layer to supply water. The irrigation water seeps downward and flows through the cultivation substrate layer and the bottom waste layer in sequence. While meeting the water needs of the planted crops, it moistens the waste layer to accelerate its decomposition and fermentation. Microbial agents can be added to the irrigation water in advance to further accelerate the fermentation speed of the bottom waste.

[0096] Based on the water and bacteria supply, proceed to step S23, start the aeration pump, provide sufficient oxygen through the aeration pipe cultivation system, control the start of the aeration pump connected to the bottom aeration pipe, replenish fresh oxygen to the root zone of the crop and the bottom waste fermentation layer, ensure that the roots carry out normal aerobic respiration, and at the same time ensure that the bottom material carries out efficient microbial aerobic fermentation, thereby promoting crop growth and driving the rapid decomposition of waste, thereby accelerating the release of carbon dioxide gas.

[0097] When the fermentation gas production reaches a stage of vigorous growth, step S24 is executed: the aeration pump is turned off, carbon dioxide gas is collected by controlling the control valve of the gas storage tank, the oxygen supply of the aeration pump is cut off to stop its operation, and the operation of the extraction equipment and related control valves connected to the gas storage tank is controlled to actively extract and retain the carbon dioxide fertilizer produced by root respiration and the decomposition and fermentation of waste at the bottom, and continuously pressurize it into the special gas storage tank for storage.

[0098] After the gas has accumulated to a certain stage, step S25 is executed. Based on the collected carbon dioxide gas, quantitative replenishment is achieved on demand. The gas-fertilizer density of the current space is calculated by combining the environmental temperature and pressure parameters monitored in real time. Then, the accurate target replenishment amount is calculated by binding the facility volume and the fertilizer requirement coefficient of the specific crop. When the replenishment amount reaches the set trigger limit, the output valve on the gas storage tank is controlled to release the purified and collected carbon dioxide gas precisely back into the canopy space of the target crop. In this way, the closed-loop control of in-situ fermentation of waste to produce gas and the return application of gas fertilizer is completed inside the cultivation tank.

[0099] Figure 6 This is one of the schematic diagrams of the lightweight facility substrate cultivation system provided by the present invention, such as... Figure 6 As shown, the overall architecture is mainly constructed by the collaborative construction of cultivation facility 1, gas storage equipment 2, monitoring equipment 3, and controller 4.

[0100] Specifically, a cultivation trough 5 is set inside the cultivation facility 1. Organic materials are layered from bottom to top inside the cultivation trough 5, with agricultural and forestry waste layer placed at the bottom. An aeration pipe 6 is arranged above the waste layer to connect to external aeration equipment to deliver fresh oxygen to the bottom layer of materials to ensure aerobic fermentation and root respiration. A conventional cultivation substrate layer is laid above the aeration pipe 6. Drip irrigation pipes 7 are arranged inside the substrate layer to deliver water to the materials and meet the needs of drip irrigation. A waterproof membrane 8 is covered above the substrate layer. The waterproof membrane 8 has the characteristics of being breathable but not water-permeable, which can prevent the evaporation of substrate moisture and allow carbon dioxide fertilizer to overflow upwards. A sealing cover 9 is set on the top of the cultivation trough 5 to close the trough. The sealing cover 9 has cultivation holes 11 for planting the target crop. The waterproof membrane 8 and the sealing cover 9 naturally enclose each other to form a gas collection chamber 10 for collecting overflowing fertilizer.

[0101] The gas storage device 2, which is connected to the gas collection chamber 10, mainly includes a gas guide pipe 12, a gas storage tank 13, a gas pump 14, a pressure gas pump 15, an exhaust valve 16, and a pressure detection device 17. One end of the gas guide pipe 12 is connected to the gas collection chamber 10, and the other end extends into the gas storage tank 13. The distance between the pipe opening extending into the bottom of the gas storage tank 13 and the bottom of the tank is controlled within 10 centimeters to facilitate the collection of carbon dioxide gas.

[0102] An air pump 14 and a pressure air pump 15 are arranged on the air duct 12 to actively extract the gas in the gas collection chamber 10 and transport it to the gas storage tank 13. The gas storage tank 13 is a special gas container that meets the pressure of 5 MPa or above. It is equipped with an exhaust valve 16 and a pressure detection device 17. The exhaust valve 16 is used to allow air to circulate with the outside air and to discharge the initially collected ordinary air. The pressure detection device 17 is used to monitor the pressure in the gas storage tank 13 in real time.

[0103] The monitoring device 3 is suspended above the sealing cover plate 9 and is used to collect the current environmental parameters at the height of the crop canopy inside the cultivation facility 1. The controller 4 is connected to the monitoring device 3, the pressure detection device 17, the air pump 14, the pressure air pump 15, the exhaust valve 16, and the output valve on the gas storage device 2. It is used to record environmental and pressure data, adjust the start and stop of the air pump, and control the opening and closing of related valves, so as to realize the on-demand fertilization regulation of substrate cultivation.

[0104] Figure 7 This is the second schematic diagram of the lightweight facility substrate cultivation system provided by the present invention, as shown below. Figure 7 As shown, the cultivation facility 1 has multiple cultivation holes 11 arranged longitudinally along the central axis for planting target crops. Irrigation pipe 7 interfaces are located at the edge of the cultivation facility 1 for on-demand irrigation. Monitoring equipment 3 is installed around the periphery of the sidewall of the cultivation facility 1 to acquire real-time physical environmental data of the canopy space outside the cultivation facility 1. A gas storage device is located on the right side of the system and connected to the cultivation facility 1 via a pipeline system. The gas storage device integrates a pressure pump 15 for gas delivery. The end is connected to the gas collection space inside the cultivation facility 1, and is used to pump the collected gas fertilizer into the gas storage box; the top of the gas storage box is equipped with a pressure detection device 17 for detecting the internal air pressure and an exhaust valve 16 for venting air to the outside. The exhaust valve 16 is marked in the form of an elliptical element, realizing the gas purification function during the gas storage process; the controller 4 is integrated at the end of the gas storage equipment, serving as the core logic processing unit of the system, and establishes signal connections with various sensors and actuators to realize centralized management of the entire cultivation process and gas fertilizer application control process.

[0105] Figure 8This is a schematic diagram of the gas fertilizer application control device for lightweight substrate cultivation provided by the present invention, as shown below. Figure 8 As shown, it mainly includes, but is not limited to: The parameter acquisition module 810 is used to acquire the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure and current fertilizer concentration.

[0106] The density determination module 820 is used to determine the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration.

[0107] The supplementary application amount determination module 830 is used to determine the target supplementary application amount of gas fertilizer based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop.

[0108] The fertilization control module 840 is used to fertilize the target crop with gas fertilizer according to the target amount of gas fertilizer supplementation; wherein, the gas fertilizer is produced by the fermentation of organic materials in the cultivation facility and collected and stored in advance.

[0109] It should be noted that the gas and fertilizer application control device for lightweight substrate cultivation provided by the present invention can execute the gas and fertilizer application control method for lightweight substrate cultivation described in any of the above embodiments during specific operation, which will not be elaborated in this embodiment.

[0110] The lightweight substrate cultivation gas fertilizer control device provided by this invention collects and stores the gas fertilizer produced by fermentation inside the cultivation facility, and determines the amount of gas fertilizer that needs to be supplemented based on real-time air temperature, air pressure and the gas fertilizer demand of the crop, and then applies the fertilizer accordingly. This reduces costs, makes the supply of gas fertilizer match the actual needs of crop growth, and reduces resource waste.

[0111] Figure 9 This is a schematic diagram of the structure of the electronic device provided by the present invention, such as... Figure 9As shown, the electronic device may include: a processor 910, a communication interface 920, a memory 930, and a communication bus 940, wherein the processor 910, the communication interface 920, and the memory 930 communicate with each other through the communication bus 940. The processor 910 can call logical instructions in the memory 930 to execute a gas fertilizer application control method for lightweight substrate cultivation. This method includes: acquiring the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current gas fertilizer concentration; determining the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration; determining the target gas fertilizer supplementation amount based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop; and applying the gas fertilizer to the target crop according to the target gas fertilizer supplementation amount; wherein the gas fertilizer is produced by fermentation of organic materials within the cultivation facility and pre-collected and stored.

[0112] Furthermore, the logical instructions in the aforementioned memory 930 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0113] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the gas fertilizer application control method for lightweight substrate cultivation provided by the above methods. The method includes: acquiring the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current gas fertilizer concentration; determining the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration; determining the target gas fertilizer supplementation amount based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop; and applying gas fertilizer to the target crop according to the target gas fertilizer supplementation amount; wherein the gas fertilizer is produced by fermentation of organic materials in the cultivation facility and pre-collected and stored.

[0114] In another aspect, the present invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements a gas fertilizer application control method for lightweight substrate cultivation provided by the methods described above. This method includes: acquiring current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current gas fertilizer concentration; determining a current gas fertilizer density based on the current environmental parameters and a preset gas fertilizer concentration; determining a target gas fertilizer supplementation amount based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop; and applying the gas fertilizer to the target crop according to the target gas fertilizer supplementation amount; wherein the gas fertilizer is produced by fermentation of organic materials within the cultivation facility and pre-collected and stored.

[0115] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0116] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the application of air and fertilizer in lightweight substrate cultivation, characterized in that, include: Obtain the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current fertilizer concentration; The current gas fertilizer density is determined based on the current environmental parameters and the preset gas fertilizer concentration. Based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop, the target gas fertilizer supplementation amount is determined; Based on the target amount of gas fertilizer supplementation, the target crop is fertilized using gas fertilizer; The gas fertilizer is produced by fermentation of organic materials within the cultivation facility and is collected and stored in advance; The step of determining the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration includes: Obtain the concentration difference between the preset gas fertilizer concentration and the current gas fertilizer concentration; The temperature correction factor is determined based on the reference temperature constant and the air temperature. Based on the atmospheric pressure and the standard atmospheric pressure constant, determine the pressure correction coefficient; The current gas fertilizer density is determined based on the temperature correction coefficient, the gas pressure correction coefficient, and the concentration difference.

2. The method for controlling gas and fertilizer application in lightweight substrate cultivation according to claim 1, characterized in that, The current gas fertilizer density is calculated based on the following mathematical model: ； in, For the first i Heaven, the First j The current air-fertilizer density at any given moment. For the first i Heaven, the First j The air temperature at any given moment; For the first i Heaven, the First j Atmospheric pressure at any given moment; Preset the gas fertilizer concentration; For the first i Heaven, the First j The current concentration of fertilizer gas at any given moment.

3. The method for controlling gas and fertilizer application in lightweight substrate cultivation according to claim 1, characterized in that, The determination of the target fertilizer application amount based on the current fertilizer density, the volume of the cultivation facility, and the fertilizer requirement coefficient of the target crop includes: Obtain the current growth stage of the target crop; Based on the type of the target crop and its current growth stage, determine the gas and fertilizer requirement coefficient of the target crop; The target amount of supplemental gas fertilizer is determined based on the current gas fertilizer density, the volume of the cultivation facility, the gas fertilizer demand coefficient, and the preset gas fertilizer utilization coefficient.

4. The method for controlling gas and fertilizer application in lightweight substrate cultivation according to claim 3, characterized in that, The target amount of gaseous fertilizer supplementation was calculated based on the following mathematical model: ； in, For the first i Heaven, the First j The target amount of supplemental fertilizer at any given time. For the first i Heaven, the First j The current air-fertilizer density at any given moment. This is the gas fertilizer demand coefficient. For the volume of the cultivation facility, ρ This is the gas fertilizer utilization coefficient.

5. The method for controlling gas and fertilizer application in lightweight substrate cultivation according to claim 1, characterized in that, The step of applying gaseous fertilizer to the target crop according to the target gaseous fertilizer supplementation amount includes: Obtain the current storage amount of the gas fertilizer; Based on the preset gas-fertilizer replenishment coefficient and the current storage amount, the replenishment trigger threshold is determined; When the target amount of gas fertilizer is greater than or equal to the application trigger threshold, a command to open the output valve is sent to the gas storage device storing the gas fertilizer. When the amount of gas fertilizer released reaches the target amount of gas fertilizer supplementation, a command to close the output valve is sent to the gas storage device storing the gas fertilizer.

6. The method for controlling air and fertilizer application in lightweight substrate cultivation according to claim 1, characterized in that, The gas fertilizer is pre-collected and stored through the following steps: Send a start command to the air extraction device to extract the gas fertilizer in the cultivation facility into the gas storage device; Send an opening command to the exhaust valve of the gas storage device to discharge the air in the gas storage device except for the gas fertilizer; After a preset time, a closing command is sent to the exhaust valve, and the current gas pressure value in the gas storage device is obtained; When the current air pressure value reaches the preset storage air pressure threshold, a stop command is sent to the air pumping device.

7. A lightweight substrate cultivation gas fertilizer application control device, characterized in that, include: The parameter acquisition module is used to acquire the current environmental parameters of the cultivation facility, including air temperature, atmospheric pressure, and current fertilizer concentration. The density determination module is used to determine the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration. The supplementary application amount determination module is used to determine the target supplementary application amount of gas fertilizer based on the current gas fertilizer density, the volume of the cultivation facility, and the gas fertilizer requirement coefficient of the target crop. The fertilization control module is used to fertilize the target crop with gaseous fertilizer according to the target amount of gaseous fertilizer supplementation; wherein the gaseous fertilizer is produced by fermentation of organic materials in the cultivation facility and collected and stored in advance; The step of determining the current gas fertilizer density based on the current environmental parameters and the preset gas fertilizer concentration includes: Obtain the concentration difference between the preset gas fertilizer concentration and the current gas fertilizer concentration; The temperature correction factor is determined based on the reference temperature constant and the air temperature. Based on the atmospheric pressure and the standard atmospheric pressure constant, determine the pressure correction coefficient; The current gas fertilizer density is determined based on the temperature correction coefficient, the gas pressure correction coefficient, and the concentration difference.

8. A lightweight substrate cultivation gas fertilization control system, characterized in that, include: The cultivation facility contains organic materials, which are used for fermentation to produce gas fertilizer. A gas storage device, connected to the cultivation facility, is used to store the gas fertilizer, and the gas storage device is equipped with an output valve; An air extraction device is connected to both the cultivation facility and the air storage device, and is used to extract the gas fertilizer from the cultivation facility into the air storage device. Monitoring equipment is used to collect current environmental parameters and the current gas pressure value inside the gas storage device; The controller is connected to the air extraction device, the output valve, and the monitoring device respectively, and is used to implement the gas fertilizer application control method for lightweight substrate cultivation as described in any one of claims 1 to 6.

9. The gas fertilization control system for lightweight substrate cultivation according to claim 8, characterized in that, The cultivation facility includes a cultivation trough, and the inside of the cultivation trough is lined with a waste layer and a substrate layer from bottom to top, the waste layer and the substrate layer constituting the organic material; A waterproof membrane covers the top of the substrate layer, and a sealing cover is provided on the top of the cultivation trough; an air collection chamber is formed between the waterproof membrane and the sealing cover, and the air inlet of the air extraction device is connected to the air collection chamber; The system also includes: A drip irrigation device, installed within the substrate layer, is used to deliver moisture to the organic material; An aeration device, installed within the waste layer, is used to supply oxygen to the organic material; The gas storage device is also equipped with an exhaust valve, which is connected to the controller and is used to discharge air other than the gas fertilizer from the gas storage device.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the gas fertilizer control method for lightweight substrate cultivation as described in any one of claims 1 to 6.

11. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the gas fertilizer control method for lightweight substrate cultivation as described in any one of claims 1 to 6.

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