A nutrient solution culture device and a circulation culture method for purple potato hydroponics

Abstract

The present invention relates to the technical field of potato hydroponics, and discloses a nutrient solution culture device and a circulation culture method for purple potato hydroponics. In the process of plant hydroponics, the lifting mechanism of the present invention can adjust the inclination angle between the liquid collecting box and the culture rack to drive the liquid surface inside the liquid collecting box to oscillate, and the hydroponic solution inside the liquid collecting box is mixed to a certain extent by oscillation, so as to ensure that the components of the hydroponic solution in each part of each liquid collecting box are uniform, and a good hydroponic environment can be provided for the plant to promote the growth of the plant, and the hydroponic solution at the bottom is transported to the waste liquid treatment mechanism for treatment and discharge through the waste liquid recovery mechanism, and the hydroponic solution is provided to each liquid collecting box again in a regular and quantitative manner through the culture solution transport mechanism, so that the hydroponic solution that has lost nutrients can be replaced in time, and different types of hydroponic solutions can be replaced to cope with different growth processes of the plant, so as to effectively ensure the hydroponic effect of the plant.

Description

Technical Field

[0001] The invention relates to the technical field of potato hydroponics, in particular to a nutrient solution culture device and a circulation culture method for purple potato hydroponics. Background Art

[0002] The nutrient solution culture device is a technology that uses nutrient solution instead of soil to provide water, nutrients and oxygen to plants, allowing plants to complete their life cycle without traditional soil. Using special devices and facilities, plants are planted in nutrient solution, or the plant roots are soaked in nutrient solution, while ensuring that part of the root system is exposed to humid air to meet the needs of plant growth and development. At present, nutrient solution culture devices are widely used in soilless cultivation of crops such as vegetables, flowers, and fruit trees. They have the advantages of saving water, fertilizer, labor, high yield, and high quality. Among them, in the plant cultivation process of purple potatoes, hydroponics (nutrient solution culture) is mostly used. Through scientific configuration of nutrient solution, strict control of environmental conditions, and meticulous management and maintenance, high-yield and high-quality potato production can be achieved.

[0003] Existing nutrient solution culture devices mainly include deep flow hydroponics technology (DFT) and nutrient film technology (NFT). However, due to the continuous consumption of nutrient solution during the hydroponic process, additional nutrient solution needs to be supplemented or excess nutrient solution needs to be provided in advance. However, conventional nutrient solution culture devices require the hydroponic plants to be taken out and the culture solution needs to be replaced, which can easily damage the root system of the plants during the hydroponic process, resulting in a decrease in the hydroponic effect. Pre-providing excess nutrient solution can easily cause the nutrient solution to rot before it can be consumed by the plants, which can also easily lead to a decrease in the hydroponic effect. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a nutrient solution culture device and a circulation culture method for purple potato hydroponics.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A nutrient solution culture device, comprising: a hydroponic box, the hydroponic box comprising a culture chamber and an operating chamber, the culture chamber is provided with a plurality of culture racks, a culture solution conveying mechanism and a waste liquid recovery mechanism, the operating chamber is provided with a liquid mixing mechanism and a waste liquid treatment mechanism; each of the culture racks is provided with a liquid collecting box, the top of the liquid collecting box is open, a plurality of culture boxes are arranged on the top of the liquid collecting box, each of the culture boxes is provided with a plurality of culture troughs on the top, the bottom of each culture trough is connected to the corresponding liquid collecting box, and the liquid level inside the liquid collecting box is always above the bottom of each culture trough; the liquid collecting box and The corresponding culture racks are connected by a lifting mechanism, and the lifting mechanism can adjust the distance between the bottom end of the corresponding liquid collecting box and the corresponding culture rack. The lifting mechanism can also adjust the inclination angle between the liquid collecting box and the culture rack to drive the liquid level inside the liquid collecting box to oscillate; the liquid mixing mechanism can pre-prepare the hydroponic solution, and transport the hydroponic solution to the inside of each liquid collecting box in a timely and quantitative manner along the culture solution conveying mechanism; the waste liquid recovery mechanism can collect the hydroponic solution from the bottom layer of each liquid collecting box in a timely and quantitative manner, and transport the hydroponic solution from the bottom layer to the waste liquid treatment mechanism for treatment and discharge.

[0007] Preferably, the culture rack includes a bottom mounting frame and a top connecting frame, and the lifting mechanism includes a plurality of pneumatic lifting rods; the fixed end of each pneumatic lifting rod is fixedly connected to the corresponding bottom mounting frame; the movable end of each pneumatic lifting rod is respectively provided with a lifting universal joint, and the movable end of each pneumatic lifting rod is respectively rotatably connected to the bottom end of the corresponding liquid collection box through the lifting universal joint.

[0008] Preferably, a plurality of limiting holes are provided at the top end of the liquid collecting box, and a plurality of connecting holes are provided at the bottom end of the top connecting frame, and each of the limiting holes corresponds to each of the connecting holes one by one; limiting springs are provided between the corresponding limiting holes and the connecting holes, and the elastic coefficient and length of each of the limiting springs are consistent.

[0009] Preferably, the movable end of each of the pneumatic lifting rods can be extended and retracted synchronously to adjust the spacing between the bottom end of each of the liquid collecting boxes and the corresponding culture rack, and to adjust the distance between two adjacent culture boxes, and the distance between two adjacent culture boxes is always smaller than the distance between the culture box at the top and the top of the culture chamber; inside the same lifting mechanism, the movable end of each of the pneumatic lifting rods can be extended and retracted independently to adjust the height of each of the lifting universal joints, drive the corresponding liquid collecting box bottom surface and the movable culture rack to change the inclination angle, and drive the liquid level inside the corresponding liquid collecting box to oscillate.

[0010] Preferably, a filter plate is slidably arranged inside the liquid collecting box and below the culture box, limiting grooves are provided at both ends of the liquid collecting box, sliding limiting rods are arranged at both ends of the filter plate close to the limiting grooves, and the sliding limiting rods are respectively embedded in the corresponding limiting grooves; the density of the filter plate is not less than the density of the hydroponic liquid, and the filter plate can slide along the direction limited by the limiting groove when the liquid level inside the liquid collecting box oscillates.

[0011] Preferably, a plurality of stirring links are provided on the side of the filter plate away from the culture box, and a stirring blade is rotatably provided on the end of the stirring link away from the filter plate; a rotation limit groove is provided on the end of the stirring link close to the stirring blade, and a rotation limit block is provided on the outer side of the end of the stirring blade close to the stirring link, and the rotation limit block is embedded in the rotation limit groove; in the process that the stirring blade rotates as the liquid level inside the liquid collecting box oscillates, the rotation angle of the stirring blade can be limited by limiting the position of the rotation limit block through the rotation limit groove.

[0012] Preferably, the waste liquid recovery mechanism includes a recovery main pipe and several recovery branch pipes, and the waste liquid treatment mechanism includes a sedimentation tank, a drain pipe is provided on one side of the sedimentation tank, and a sewage pipe is provided at the bottom of the sedimentation tank; one end of several recovery branch pipes are connected to the recovery main pipe, and the other ends of several recovery branch pipes are respectively connected to each of the liquid collecting boxes through recovery hoses; one end of the recovery main pipe extends to the inside of the operating chamber and is connected to the top of the sedimentation tank, the supernatant produced by the sedimentation inside the sedimentation tank can be discharged from the drain pipe, and the sediment produced by the sedimentation inside the sedimentation tank can be discharged from the sewage pipe.

[0013] Preferably, the liquid mixing mechanism includes a liquid mixing tank and several raw material tanks, and the culture liquid conveying mechanism includes a main conveying pipe and several branch conveying pipes; each of the raw material tanks is connected to the liquid mixing tank through a liquid pump, one end of the main conveying pipe is connected to the bottom end of the liquid mixing tank through a liquid pump, one end of each of the branch conveying pipes is connected to the main conveying pipe, and the other end of each of the branch conveying pipes is connected to each of the liquid collecting boxes through a conveying hose; each of the raw material tanks can supply hydroponic liquid raw materials to the liquid mixing tank through a liquid pump, and the hydroponic liquid evenly mixed in the liquid mixing tank can be conveyed to each of the liquid collecting boxes through the main conveying pipe, each of the branch conveying pipes and each of the conveying hoses.

[0014] Preferably, a fill light is arranged above each of the liquid collection boxes, and the types of the fill light include fluorescent lamp, red light and blue light; a ventilation fan is also arranged on the side of the culture chamber, and the ventilation fan can drive the air exchange between the culture chamber and the outside world.

[0015] A circulating culture method for hydroponically growing purple potatoes, using the above-mentioned nutrient solution culture device, comprises the following steps:

[0016] Select the top 3-4 cm of the purple potato plant after seedling emergence, cut off the large leaves, and only keep the unexpanded leaflets at the top. Peel off the 0.2-0.3 mm stem tip under a 40x dissecting microscope and place it on a sterile culture medium. Place it in a sterile room for cultivation to obtain first-class seedlings.

[0017] The first-level seedlings after 45 days of seedling formation are removed from the sterile room, washed, and placed in a nutrient solution culture device for hydroponics. When the plant grows to a height of more than 20 cm, the top 6-8 cm is cut off, and the seedlings are placed in a nutrient solution culture device for hydroponics again until new roots grow, thereby obtaining second-level seedlings;

[0018] The second-level seedlings are transferred to nutrient soil and cultured until the plant height reaches 10-15 cm to obtain third-level seedlings;

[0019] Grade three seedlings are used to plant and produce purple potatoes.

[0020] Compared with the prior art, the present invention provides a nutrient solution culture device and a purple potato hydroponic circulation culture method, which have the following beneficial effects:

[0021] 1. This nutrient solution culture device uses a culture solution conveying mechanism to convey the hydroponic solution in the mixing mechanism to the inside of each liquid collecting box in a timely and quantitative manner, places the plants to be hydroponically cultivated in each culture tank set in the culture box removed in advance, and then places the culture box into the liquid collecting box, and ensures that the height of the hydroponic solution in the liquid collecting box is always above the bottom surface of each culture tank, ensuring that the plants in each culture tank are in contact with the hydroponic solution. During the hydroponic cultivation of the plants, the lifting mechanism can adjust the inclination angle between the liquid collecting box and the culture rack to drive the liquid surface inside the liquid collecting box to oscillate, and the hydroponic solution in the liquid collecting box is vibrated to a certain extent by oscillating. Mixing ensures that the composition of the hydroponic liquid in each part of each liquid collecting box is uniform, and can provide a good hydroponic environment for the plants, promote the growth of the plants, and can, through the setting of the waste liquid recovery mechanism, the waste liquid recovery mechanism can collect the hydroponic liquid from the bottom layer of each liquid collecting box at a regular and quantitative basis, and transport the hydroponic liquid at the bottom layer to the waste liquid treatment mechanism for treatment and discharge, and through the culture liquid transportation mechanism, provide the hydroponic liquid to each liquid collecting box again at a regular and quantitative basis, and can replace the hydroponic liquid that has lost its nutrients in time, and can also replace different types of hydroponic liquids to cope with the different growth processes of the plants, which can effectively ensure the hydroponic effect of the plants.

[0022] 2. This nutrient solution culture device, during the hydroponic process of plants, can independently extend and retract the movable ends of each pneumatic lifting rod inside the same lifting mechanism to adjust the height of each lifting universal joint, drive the corresponding liquid collecting box bottom surface and the movable culture rack to change the inclination angle, drive the liquid surface inside the corresponding liquid collecting box to oscillate, and the hydroponic liquid inside the liquid collecting box is mixed to a certain extent through the oscillation, so as to ensure that the composition of the hydroponic liquid in each part of each liquid collecting box is uniform, thereby providing a good hydroponic environment for the plants and promoting the growth of the plants. In addition, in each growth stage of the hydroponic plants, the movable ends of each pneumatic lifting rod can be synchronously extended and retracted to adjust the distance between the bottom end of each liquid collecting box and the corresponding culture rack, and the distance between two adjacent culture boxes is adjusted. The distance between two adjacent culture boxes is always smaller than the distance between the culture box at the top and the top of the culture chamber, so as to adapt to the growth height of the plants and avoid the problem of poor growth of the plants due to insufficient growth space.

[0023] 3. In this nutrient solution culture device, the movable end of each pneumatic lifting rod is independently extended and retracted, driving the change of the inclination angle between the bottom surface of the corresponding liquid collecting box and the movable culture rack. In the process of driving the liquid surface inside the corresponding liquid collecting box to oscillate, the filter plate slides in the direction limited by the limit groove, which can disturb the hydroponic solution inside the liquid collecting box to a certain extent. By setting the stirring blades, when the stirring blades rotate with the oscillation of the liquid surface inside the liquid collecting box, the position of the rotating limit block is limited by the rotating limit groove to limit the rotation angle of the stirring blades, and the hydroponic solution in the oscillation process can be moved to further increase the disturbance of the hydroponic solution, so as to fully avoid the precipitation of the hydroponic solution, mix the hydroponic solution inside the liquid collecting box to a certain extent, and ensure that the composition of the hydroponic solution in each part of each liquid collecting box is uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is one of the three-dimensional structural schematic diagrams of a nutrient solution culture device of the present invention;

[0025] Figure 2 This is a second schematic diagram of the three-dimensional structure of a nutrient solution culture device of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of a nutrient solution culture device of the present invention;

[0027] Figure 4 It is a three-dimensional structural schematic diagram of a culture solution conveying mechanism, a waste liquid recovery mechanism, a liquid mixing mechanism and a waste liquid treatment mechanism of a nutrient solution culture device of the present invention;

[0028] Figure 5It is a schematic diagram of the three-dimensional structure of a culture rack, a liquid collection box, a culture box and a lifting mechanism of a nutrient solution culture device of the present invention;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of a culture rack, a liquid collection box and a lifting mechanism of a nutrient solution culture device of the present invention;

[0030] Figure 7 For the present invention Figure 6 A magnified view of part A;

[0031] Figure 8 For the present invention Figure 6 A magnified view of part B;

[0032] Fig. 9 It is a schematic diagram of the three-dimensional structure of a filter plate of a nutrient solution culture device of the present invention;

[0033] Fig.10 For the present invention Fig. 9 Enlarged view of part C.

[0034] In the figure: 1, hydroponic box; 11, culture chamber; 12, operation chamber; 2, culture rack; 21, bottom mounting rack; 22, top connecting rack; 221, connecting hole; 3, culture liquid delivery mechanism; 31, main delivery pipe; 32, branch delivery pipe; 33, delivery hose; 4, waste liquid recovery mechanism; 41, recovery main pipe; 42, recovery branch pipe; 43, recovery hose; 5, liquid mixing mechanism; 51, liquid preparation tank; 52, raw material tank; 6, waste liquid Liquid treatment mechanism; 61, sedimentation tank; 62, drain pipe; 63, sewage pipe; 7, liquid collecting box; 71, limit hole; 72, limit spring; 73, filter plate; 731, sliding limit rod; 732, stirring connecting rod; 733, stirring blade; 734, rotating limit groove; 735, rotating limit block; 74, limit groove; 8, culture box; 81, culture tank; 9, lifting mechanism; 91, pneumatic lifting rod; 92, lifting universal joint. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a nutrient solution culture device and a circulating culture method for purple potato hydroponics.

[0037] Embodiment 1:

[0038] See also Figure 1-Figure 10 A nutrient solution culture device comprises: a hydroponic box 1, the hydroponic box 1 comprises a culture chamber 11 and an operation chamber 12, a plurality of culture racks 2, a culture solution conveying mechanism 3 and a waste liquid recovery mechanism 4 are arranged inside the culture chamber 11, a liquid mixing mechanism 5 and a waste liquid treatment mechanism 6 are arranged inside the operation chamber 12; each culture rack 2 is provided with a liquid collecting box 7, the top of the liquid collecting box 7 is open, a plurality of culture boxes 8 are arranged at the top of the liquid collecting box 7, each culture box 8 is provided with a plurality of culture grooves 81 at the top, the bottom of each culture groove 81 is connected with the corresponding liquid collecting box 7, and the liquid level inside the liquid collecting box 7 is always higher than each culture groove 8 1; the liquid collecting box 7 is connected to the corresponding culture rack 2 through a lifting mechanism 9, the lifting mechanism 9 can adjust the distance between the bottom end of the corresponding liquid collecting box 7 and the corresponding culture rack 2, and the lifting mechanism 9 can also adjust the inclination angle between the liquid collecting box 7 and the culture rack 2 to drive the liquid level inside the liquid collecting box 7 to oscillate; the liquid mixing mechanism 5 can pre-prepare the hydroponic solution, and transport the hydroponic solution to the inside of each liquid collecting box 7 along the culture solution conveying mechanism 3 at a regular and quantitative time; the waste liquid recovery mechanism 4 can collect the hydroponic solution from the bottom layer of each liquid collecting box 7 at a regular and quantitative time, and transport the hydroponic solution at the bottom layer to the waste liquid treatment mechanism 6 for treatment and discharge.

[0039] When in use, the hydroponic solution is prepared in advance by the liquid mixing mechanism 5 (the specific composition of the hydroponic solution is a common solution in the prior art, and can also be prepared by the hydroponic solution solution in the subsequent embodiments), and then the hydroponic solution inside the liquid mixing mechanism 5 is transported to the inside of each liquid collecting box 7 in a timely and quantitative manner through the culture solution conveying mechanism 3, and the plants to be hydroponically cultivated are placed in each culture tank 81 set in the culture box 8 removed in advance, and then the culture box 8 is placed in the interior of the liquid collecting box 7, and it is ensured that the height of the hydroponic solution inside the liquid collecting box 7 is always above the bottom surface of each culture tank 81, ensuring that the plants in each culture tank 81 are in contact with the hydroponic solution, and then the cultivation is carried out inside the hydroponic box 1. In actual use, the hydroponic box 1 can be isolated from the outside to independently control the environmental temperature, humidity, light and other conditions inside the culture chamber 11 of the hydroponic box 1 to cooperate with the hydroponic process of the plants. During the hydroponic process of the plants, the lifting mechanism 9 can adjust the liquid collection The inclination angle between the box 7 and the culture rack 2 drives the liquid level inside the liquid collecting box 7 to oscillate, and the hydroponic liquid inside the liquid collecting box 7 is mixed to a certain extent through the oscillation, ensuring that the composition of the hydroponic liquid in each part of each liquid collecting box 7 is uniform, and can provide a good hydroponic environment for the plant, promote the growth of the plant, and can be set up through the waste liquid recovery mechanism 4. The waste liquid recovery mechanism 4 can collect the hydroponic liquid from the bottom layer of each liquid collecting box 7 at a regular and quantitative time, and transport the hydroponic liquid at the bottom layer to the waste liquid treatment mechanism 6 for treatment and discharge, and through the culture liquid transportation mechanism 3, the hydroponic liquid is provided to each liquid collecting box 7 again at a regular and quantitative time (the type and amount of hydroponic liquid transported each time can be different, but they all need to cover the bottom surface of each culture tank 81), and the hydroponic liquid that has lost its nutrients can be replaced in time, and different types of hydroponic liquid can be replaced to cope with different growth processes of the plant, which can effectively ensure the hydroponic effect of the plant.

[0040] Embodiment 2:

[0041] See also Figure 1-Figure 2 , Figure 5-Figure 10 The difference from the above embodiment is that the culture rack 2 includes a bottom mounting frame 21 and a top connecting frame 22, and the lifting mechanism 9 includes a plurality of pneumatic lifting rods 91; the fixed ends of each pneumatic lifting rod 91 are fixedly connected to the corresponding bottom mounting frame 21; the movable ends of each pneumatic lifting rod 91 are respectively provided with a lifting universal joint 92, and the movable ends of each pneumatic lifting rod 91 are respectively rotatably connected to the bottom end of the corresponding liquid collecting box 7 through the lifting universal joint 92.

[0042] A plurality of limiting holes 71 are provided at the top of the liquid collecting box 7, and a plurality of connecting holes 221 are provided at the bottom of the top connecting frame 22, and each limiting hole 71 corresponds to each connecting hole 221 one by one; a limiting spring 72 is provided between the corresponding limiting holes 71 and the connecting holes 221, and the elastic coefficient and length of each limiting spring 72 are consistent.

[0043] The movable ends of the pneumatic lifting rods 91 can be extended and retracted synchronously to adjust the spacing between the bottom end of each liquid collecting box 7 and the corresponding culture rack 2, and to adjust the distance between two adjacent culture boxes 8. The distance between two adjacent culture boxes 8 is always smaller than the distance between the culture box 8 at the top and the top of the culture chamber 11. Inside the same lifting mechanism 9, the movable ends of the pneumatic lifting rods 91 can be extended and retracted independently to adjust the height of each lifting universal joint 92, drive the corresponding liquid collecting box 7 The bottom surface of the movable culture rack 2 changes, and drive the liquid level inside the corresponding liquid collecting box 7 to oscillate.

[0044] When in use, through the setting of each pneumatic lifting rod 91, and the movable end of each pneumatic lifting rod 91 is rotatably connected with the bottom end of the corresponding liquid collecting box 7 through the lifting universal joint 92, so that during the hydroponic process of the plant, the movable end of each pneumatic lifting rod 91 can be independently extended and retracted inside the same lifting mechanism 9, and the height of each lifting universal joint 92 can be adjusted to drive the inclination angle between the bottom surface of the corresponding liquid collecting box 7 and the movable culture rack 2 to change, and drive the liquid level inside the corresponding liquid collecting box 7 to vibrate, and the hydroponic liquid inside the liquid collecting box 7 is mixed to a certain extent through the vibration, so as to ensure that each liquid collecting box 7 inside The composition of the hydroponic liquid in each part is uniform, which can provide a good hydroponic environment for the plants and promote the growth of the plants. In addition, in each growth stage of the hydroponic plants, the movable ends of the pneumatic lifting rods 91 can be synchronously extended and retracted to adjust the distance between the bottom end of each liquid collection box 7 and the corresponding culture rack 2, and the distance between two adjacent culture boxes 8 is adjusted. The distance between two adjacent culture boxes 8 is always smaller than the distance between the culture box 8 at the top and the top of the culture chamber 11 to adapt to the growth height of the plants, avoid the problem of poor growth of the plants due to insufficient growth space, and effectively ensure the hydroponic effect of the plants.

[0045] Embodiment three:

[0046] See also Figure 1-Figure 2 , Figure 5-Figure 10 The difference from the above embodiment is that a filter plate 73 is slidably arranged inside the liquid collecting box 7 and below the culture box 8, limiting grooves 74 are provided at both ends of the liquid collecting box 7, and sliding limiting rods 731 are provided at both ends of the filter plate 73 close to the limiting grooves 74, and the sliding limiting rods 731 are respectively embedded in the corresponding limiting grooves 74; the density of the filter plate 73 is not less than the density of the hydroponic liquid, and the filter plate 73 can slide along the direction limited by the limiting grooves 74 when the liquid level inside the liquid collecting box 7 oscillates.

[0047] A plurality of stirring links 732 are arranged on the side of the filter plate 73 away from the culture box 8, and a stirring blade 733 is rotatably arranged on the end of the stirring link 732 away from the filter plate 73; a rotation limit groove 734 is provided on the end of the stirring link 732 close to the stirring blade 733, and a rotation limit block 735 is arranged on the outer side of the end of the stirring blade 733 close to the stirring link 732, and the rotation limit block 735 is embedded in the rotation limit groove 734; in the process that the stirring blade 733 rotates with the oscillation of the liquid level inside the liquid collecting box 7, the rotation angle of the stirring blade 733 can be limited by limiting the position of the rotation limit block 735 by the rotation limit groove 734.

[0048] Therefore, when in use, especially when the movable ends of each pneumatic lifting rod 91 can be independently extended and retracted, the height of each lifting universal joint 92 can be adjusted, the inclination angle between the bottom surface of the corresponding liquid collecting box 7 and the movable culture rack 2 can be driven to change, and in the process of driving the liquid level inside the corresponding liquid collecting box 7 to oscillate, the filter plate 73 slides in the direction limited by the limit groove 74, which can disturb the hydroponic liquid inside the liquid collecting box 7 to a certain extent, and through the setting of the stirring blade 733, when the stirring blade 733 rotates with the oscillation of the liquid level inside the liquid collecting box 7, the position of the rotating limit block 735 is limited by rotating the limit groove 734 to limit the rotation angle of the stirring blade 733, and the hydroponic liquid in the oscillation process can be moved to further increase the disturbance of the hydroponic liquid, so as to fully avoid the precipitation of the hydroponic liquid, mix the hydroponic liquid inside the liquid collecting box 7 to a certain extent, and ensure that the composition of the hydroponic liquid in each part of each liquid collecting box 7 is uniform.

[0049] Embodiment 4:

[0050] See also Figure 1-Figure 5 , which is different from the above-mentioned embodiment, is that the waste liquid recovery mechanism 4 includes a recovery main pipe 41 and a plurality of recovery branch pipes 42, the waste liquid treatment mechanism 6 includes a sedimentation tank 61, a liquid discharge pipe 62 is provided on one side of the sedimentation tank 61, and a sewage discharge pipe 63 is provided at the bottom of the sedimentation tank 61; one end of the plurality of recovery branch pipes 42 are connected to the recovery main pipe 41, and the other ends of the plurality of recovery branch pipes 42 are respectively connected to each liquid collecting box 7 through a recovery hose 43; one end of the recovery main pipe 41 extends to the inside of the operating chamber 12 and is connected to the top of the sedimentation tank 61, the supernatant generated by the sedimentation inside the sedimentation tank 61 can be discharged from the liquid discharge pipe 62, and the sediment generated by the sedimentation inside the sedimentation tank 61 can be discharged from the sewage discharge pipe 63.

[0051] The liquid mixing mechanism 5 includes a liquid mixing tank 51 and a plurality of raw material tanks 52, and the culture liquid conveying mechanism 3 includes a main conveying pipe 31 and a plurality of branch conveying pipes 32; each raw material tank 52 is connected to the liquid mixing tank 51 through a liquid pump, one end of the main conveying pipe 31 is connected to the bottom end of the liquid mixing tank 51 through a liquid pump, one end of each branch conveying pipe 32 is connected to the main conveying pipe 31, and the other end of each branch conveying pipe 32 is connected to each liquid collecting box 7 through a conveying hose 33; each raw material tank 52 can supply hydroponic liquid raw materials to the liquid mixing tank 51 through a liquid pump, and the hydroponic liquid evenly mixed in the liquid mixing tank 51 can be conveyed to each liquid collecting box 7 through the main conveying pipe 31, each branch conveying pipe 32 and each conveying hose 33.

[0052] A fill light is arranged above each liquid collection box 7, and the types of fill lights include fluorescent lamps, red lights and blue lights; a ventilation fan is also arranged on the side of the culture chamber 11, and the ventilation fan can drive the air exchange between the culture chamber 11 and the outside.

[0053] Therefore, when it is used, the hydroponic liquid that has lost its nutrients in each liquid collecting box 7 is recovered through the several recovery branches 42 of the waste liquid recovery mechanism 4 (specifically, each recovery branch 42 is provided with a solenoid valve to control the on-off of the channel for outputting the hydroponic liquid from each liquid collecting box 7 to the corresponding recovery branch 42), and is input into the sedimentation tank 61 along the recovery main pipe 41. After sedimentation in the sedimentation tank 61, the broken branches and leaves of the plants produced by the hydroponic culture are precipitated and discharged from the sewage pipe 63. The supernatant produced by the precipitation can be discharged from the drainage pipe 62, and can be classified and processed to avoid pollution. Each raw material tank 52 can be respectively discharged through the liquid The pump supplies hydroponic liquid raw materials to the liquid mixing tank 51 (specifically, the amount of each hydroponic liquid raw material is controlled by starting and stopping the liquid pump and the action time). The hydroponic liquid evenly mixed in the liquid mixing tank 51 can be transported to each liquid collecting box 7 through the main delivery pipe 31, each branch delivery pipe 32 and each delivery hose 33, and is connected to each liquid collecting box 7 through each recovery hose 43 and each delivery hose 33, so that the effectiveness of the connection is maintained during the movement or oscillation of the liquid collecting box 7; through the setting of the fill light and the ventilation fan, the ambient temperature, humidity, light and other conditions inside the culture chamber 11 can be adjusted in conjunction with the hydroponic process of the plant.

[0054] Embodiment five:

[0055] A circulation culture method for hydroponically growing purple potatoes, using a nutrient solution culture device as described in any one of Embodiments 1 to 4, comprises the following steps:

[0056] The purple potato tubers were cultured in advance. After the purple potato tubers emerged after 20 days of culture, the top 3-4 cm of the plant was cut off, the large leaves were cut off, and only the unexpanded leaflets at the top were retained, and the tubers were rinsed under running water for 2 hours.

[0057] Place the rinsed unexpanded leaflets on a clean bench, first disinfect with 75% alcohol for 10 seconds, rinse with sterile water twice, then disinfect with 75% alcohol for 10 seconds, rinse with sterile water three times, then disinfect with 0.1% mercuric chloride for 8 minutes, rinse with sterile water 3-5 times;

[0058] Under a 40x dissecting microscope, 0.2-0.3 mm of the stem tip was peeled off and placed on a sterile culture medium, and cultured in a sterile room with a light intensity of 1500-2000 lx and a temperature of (24±2)°C for 16 h / day to obtain first-class seedlings;

[0059] The sterile culture medium is a basic medium of MS (Murashige and Skoog), with NAA (α-naphthylacetic acid), GA (gibberellic acid) and 6-BA (6-benzylaminopurine) added thereto, wherein the addition amounts are: NAA 0.05 mg / L, GA 0.1 mg / L, 6-BA 1.0 mg / L;

[0060] After 45 days of seedling formation, the first-level seedlings are removed from the sterile room, cleaned, and placed in a hydroponic nutrient solution for hydroponics. When the plant grows to a height of more than 20 cm, the top 6-8 cm is cut off, and then placed in a rooting agent for 10 minutes, and placed in a rooting culture solution for hydroponics until new roots grow, thereby obtaining the second-level seedlings;

[0061] The hydroponic nutrient solution is an aqueous solution containing 233 mg / L calcium nitrate tetrahydrate, 198 mg / L potassium nitrate, 38 mg / L potassium dihydrogen phosphate, 123 mg / L magnesium sulfate heptahydrate, 7 mg / L iron sulfate heptahydrate, 9 mg / L disodium ethylenediaminetetraacetic acid, 0.2 mg / L potassium iodide, 1.6 mg / L boric acid, 5.6 mg / L manganese sulfate tetrahydrate, 2.2 mg / L zinc sulfate heptahydrate, 0.06 mg / L sodium molybdate tetrahydrate, 0.006 mg / L copper sulfate pentahydrate, and 0.006 mg / L cobalt chloride hexahydrate;

[0062] The rooting agent is a 0.10-0.15 g / L NAA (α-naphthylacetic acid) aqueous solution;

[0063] The rooting culture solution is an aqueous solution containing 0.56 g / L potassium nitrate and 0.42 g / L diammonium phosphate;

[0064] Among them, the secondary seedlings can be expanded and propagated, and the specific operations are as follows:

[0065] Cut off the top 6-8cm of the secondary seedlings, soak them in rooting agent for 10 minutes, place them in rooting culture solution for 5 days until new roots grow, and then place them in hydroponic nutrient solution for 40 days until the seedlings grow strong;

[0066] After cutting off the top 6-8cm, continue to culture for 40 days until the branches grow out and reach a length of more than 6cm. Take the branches and soak them in rooting agent for 10 minutes, place them in rooting culture solution for hydroponics for 5 days until new roots grow out, and then place them in hydroponic nutrient solution for hydroponics for 40 days until the seedlings grow strong.

[0067] Cut off the top again, take the cut top and the branches after 40 days and repeat the cycle to expand the reproduction of the secondary seedlings (the secondary seedlings after expanded reproduction are also used as secondary seedlings).

[0068] The second-level seedlings are transferred to nutrient soil and cultured until the plant height reaches 10-15 cm to obtain third-level seedlings;

[0069] Level 3 seedlings are used to produce purple potatoes. The production of purple potatoes: add red and blue light under normal light to increase the anthocyanin content. The specific operation is: add 5 hours of light with a red-to-blue light ratio of 1:5 from 10:00 to 15:00 every day; the rest of the cultivation and management methods are the same as ordinary potatoes.

[0070] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nutrient solution culture device, characterized in that: include: A hydroponic box (1), the hydroponic box (1) comprising a culture chamber (11) and an operating chamber (12), the culture chamber (11) being provided with a plurality of culture racks (2), a culture liquid conveying mechanism (3) and a waste liquid recovery mechanism (4), and the operating chamber (12) being provided with a liquid mixing mechanism (5) and a waste liquid treatment mechanism (6); Each of the culture racks (2) is provided with a liquid collecting box (7) inside, the top of the liquid collecting box (7) is open, a plurality of culture boxes (8) are arranged on the top of the liquid collecting box (7), a plurality of culture grooves (81) are arranged on the top of each culture box (8), the bottom of each culture groove (81) is connected to the corresponding liquid collecting box (7), and the liquid level inside the liquid collecting box (7) is always above the bottom surface of each culture groove (81); The liquid collecting box (7) is connected to the corresponding culture rack (2) via a lifting mechanism (9), and the lifting mechanism (9) is capable of adjusting the distance between the bottom end of the corresponding liquid collecting box (7) and the corresponding culture rack (2). The lifting mechanism (9) is also capable of adjusting the inclination angle between the liquid collecting box (7) and the culture rack (2) to drive the liquid surface inside the liquid collecting box (7) to oscillate; The liquid mixing mechanism (5) is capable of preparing the hydroponic solution in advance, and transporting the hydroponic solution to the interior of each of the liquid collecting boxes (7) in a timely and quantitative manner along the culture solution transport mechanism (3); The waste liquid recovery mechanism (4) can collect the hydroponic liquid from the bottom layer inside each of the liquid collection boxes (7) at a fixed time and in a fixed quantity, and transport the hydroponic liquid from the bottom layer to the waste liquid treatment mechanism (6) for treatment and discharge.

2. A nutrient solution culture device according to claim 1, characterized in that: The culture rack (2) comprises a bottom mounting rack (21) and a top connecting rack (22), and the lifting mechanism (9) comprises a plurality of pneumatic lifting rods (91); The fixed ends of the pneumatic lifting rods (91) are respectively fixedly connected to the corresponding bottom mounting frames (21); The movable end of each of the pneumatic lifting rods (91) is respectively provided with a lifting universal joint (92), and the movable end of each of the pneumatic lifting rods (91) is rotationally connected to the bottom end of the corresponding liquid collecting box (7) through the lifting universal joint (92).

3. A nutrient solution culture device according to claim 2, characterized in that: The top end of the liquid collecting box (7) is provided with a plurality of limiting holes (71), and the bottom end of the top connecting frame (22) is provided with a plurality of connecting holes (221), and each of the limiting holes (71) and each of the connecting holes (221) correspond to each other one by one; A limiting spring (72) is provided between the corresponding limiting holes (71) and the connecting holes (221), and the elastic coefficient and length of each limiting spring (72) are consistent.

4. A nutrient solution culture device according to claim 3, characterized in that: The movable ends of the pneumatic lifting rods (91) can be extended and retracted synchronously to adjust the distance between the bottom end of each liquid collection box (7) and the corresponding culture rack (2), and to adjust the distance between two adjacent culture boxes (8), and the distance between two adjacent culture boxes (8) is always smaller than the distance between the culture box (8) at the top and the top of the culture chamber (11); Inside the same lifting mechanism (9), the movable end of each pneumatic lifting rod (91) can be extended and retracted independently to adjust the height of each lifting universal joint (92), drive the corresponding inclination angle between the bottom surface of the liquid collecting box (7) and the culture rack (2) to change, and drive the liquid level inside the corresponding liquid collecting box (7) to oscillate.

5. A nutrient solution culture device according to claim 1, characterized in that: A filter plate (73) is slidably arranged inside the liquid collection box (7) and below the culture box (8); limiting grooves (74) are provided at both ends of the liquid collection box (7); sliding limiting rods (731) are arranged at both ends of the filter plate (73) close to the limiting grooves (74); the sliding limiting rods (731) are respectively embedded in the corresponding limiting grooves (74); The density of the filter plate (73) is not less than the density of the hydroponic liquid, and the filter plate (73) can slide along the direction limited by the limiting groove (74) when the liquid surface inside the liquid collecting box (7) oscillates.

6. A nutrient solution culture device according to claim 5, characterized in that: A plurality of stirring links (732) are arranged on one side of the filter plate (73) away from the culture box (8); and a stirring blade (733) is rotatably arranged on one end of the stirring link (732) away from the filter plate (73); A rotation limiting groove (734) is provided at one end of the stirring connecting rod (732) close to the stirring blade (733), and a rotation limiting block (735) is provided on the outer side of one end of the stirring blade (733) close to the stirring connecting rod (732), and the rotation limiting block (735) is embedded in the rotation limiting groove (734); In the process of the stirring blade (733) rotating as the liquid level inside the liquid collecting box (7) oscillates, the rotation angle of the stirring blade (733) can be limited by limiting the position of the rotation limiting block (735) through the rotation limiting groove (734).

7. A nutrient solution culture device according to claim 1, characterized in that: The waste liquid recovery mechanism (4) comprises a recovery main pipe (41) and a plurality of recovery branch pipes (42); the waste liquid treatment mechanism (6) comprises a sedimentation tank (61); a liquid discharge pipe (62) is arranged on one side of the sedimentation tank (61); and a sewage discharge pipe (63) is arranged at the bottom end of the sedimentation tank (61); One end of each of the recovery branch pipes (42) is connected to the recovery main pipe (41), and the other end of each of the recovery branch pipes (42) is connected to each of the liquid collecting boxes (7) via a recovery hose (43); One end of the recovery main pipe (41) extends into the interior of the operating chamber (12) and is in communication with the top of the sedimentation tank (61); the supernatant generated by sedimentation in the sedimentation tank (61) can be discharged from the drain pipe (62); and the precipitate generated by sedimentation in the sedimentation tank (61) can be discharged from the sewage pipe (63).

8. A nutrient solution culture device according to claim 1, characterized in that: The liquid mixing mechanism (5) comprises a liquid preparation tank (51) and a plurality of raw material tanks (52); the culture liquid delivery mechanism (3) comprises a main delivery pipe (31) and a plurality of branch delivery pipes (32); Each of the raw material tanks (52) is connected to the liquid distribution tank (51) through a liquid pump, one end of the main delivery pipe (31) is connected to the bottom end of the liquid distribution tank (51) through a liquid pump, one end of each of the branch delivery pipes (32) is connected to the main delivery pipe (31), and the other end of each of the branch delivery pipes (32) is connected to each of the liquid collection boxes (7) through a delivery hose (33); Each of the raw material tanks (52) can supply hydroponic liquid raw materials to the liquid preparation tank (51) through a liquid pump, and the hydroponic liquid evenly mixed in the liquid preparation tank (51) can be transported to each of the liquid collection boxes (7) through the main delivery pipe (31), each of the branch delivery pipes (32) and each of the delivery hoses (33).

9. A nutrient solution culture device according to claim 1, characterized in that: A fill light is arranged above each of the liquid collecting boxes (7), and the types of the fill light include fluorescent lamp, red light lamp and blue light lamp; A ventilation fan is also provided on the side of the culture chamber (11), and the ventilation fan can drive air exchange between the culture chamber (11) and the outside world.

10. A circulation culture method for hydroponically growing purple potatoes, characterized in that: A nutrient solution culture device as described in any one of claims 1 to 9 is used, comprising the following steps: Select the top 3-4 cm of the purple potato plant after seedling emergence, cut off the large leaves, and only keep the unexpanded leaflets at the top. Peel off the 0.2-0.3 mm stem tip under a 40x dissecting microscope and place it on a sterile culture medium. Place it in a sterile room for cultivation to obtain first-class seedlings. The first-level seedlings after 45 days of seedling formation are removed from the sterile room, washed, and placed in a nutrient solution culture device for hydroponics. When the plant grows to a height of more than 20 cm, the top 6-8 cm is cut off, and the seedlings are placed in a nutrient solution culture device for hydroponics again until new roots grow, thereby obtaining second-level seedlings; The second-level seedlings are transferred to nutrient soil and cultured until the plant height reaches 10-15 cm to obtain third-level seedlings; Grade three seedlings are used to plant and produce purple potatoes.

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