Device and method for promoting growth of eggplant seedlings based on regulation and control of light source

Abstract

The invention discloses a device and method for promoting growth of eggplant seedlings based on regulation and control of a light source. The device comprises a supporting rod and a connecting rod. The supporting rod is connected with a fixing rod through a connector. A plurality of light sources are uniformly distributed on the fixed rod; the connecting rods and the supporting rods jointly form a shed body structure; partition blocks are arranged in the soil layer in the shed body structure formed by the connecting rods and the supporting rods; an operator sequentially puts the seedling raising boxes in the water channel, after all the seedling raising boxes are placed in the water channel, normal operation of the circulating pump is kept, water flows continuously, then the seedling raising boxes move continuously in the greenhouse, eggplant seedlings can be irradiated by a light source at all angles in the greenhouse through continuous movement, and the seedling raising boxes can be adjusted by adjusting the light source, so that the seedling raising efficiency is improved. Therefore, each eggplant seedling can fully receive favorable illumination of the combined light sources with different colors in different development periods, the illumination angle of lamplight does not need to be adjusted deliberately, and local damage is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of eggplant seedling cultivation, and particularly relates to a device and method for promoting the growth of eggplant seedlings based on regulating light sources. Background Art

[0002] Light is not only the energy source for photosynthesis in plants, but also can regulate various stages of plant growth and development in the form of light signals through light intensity and light quality. Therefore, light has a very significant effect on plant growth and development, especially the impact on physiological and biochemical processes such as plant stomatal opening, leaf senescence, carbon and nitrogen metabolism, secondary metabolism, gene expression, etc. It is an important part of biological research and a new field of agricultural ecological research. Due to high market demand, eggplant is widely planted and studied. The latest planting method combines greenhouse soilless cultivation technology and supplementary lighting technology to cultivate eggplants with excellent quality and increased yield.

[0003] At present, for eggplant in the early stage of seedling cultivation, although the requirements for the length of sunshine time are not strict, it is best to provide about 12 to 16 hours of light per day to ensure the healthy growth of the seedlings. If the light is insufficient, the seedlings may grow too long, with short and strong stems, short internodes and large leaf area, which will affect the development of the plants. Therefore, in the scientific planting method of eggplant, it is necessary to use supplementary lighting to cultivate eggplant.

[0004] Patent CN106613139A discloses a method for growing eggplants. The method uses sunlight to provide light for the eggplants during the day and uses electric lights to supplement the light for the eggplants at night, ensuring that the eggplants receive sufficient light during the growth process. During this period, lenses are used to reflect the light source to provide sufficient light for each eggplant.

[0005] In the technical solution of the above patent, lenses are used to reflect light sources to illuminate each eggplant. However, this method has the problem that the lighting angle is difficult to adjust, which may cause local eggplants to be damaged by strong light. In order to ensure that the eggplants are evenly illuminated, a large number of lenses with different angles are required, which is not only time-consuming and labor-intensive, but also difficult to control the lens angle, which is not convenient for practical application. Summary of the invention

[0006] The purpose of the present invention is to provide a device and method for promoting the growth of eggplant seedlings based on regulating light sources to solve the technical problems in the prior art that it is difficult to adjust the angle when using a reflected light source to provide light for the eggplant seedlings, which easily causes local eggplants inside the greenhouse to be damaged.

[0007] The purpose of the present invention can be achieved through the following technical solutions: A device for promoting the growth of eggplant seedlings based on regulating light sources, comprising a support rod and a connecting rod; a fixing rod is connected to the support rod via a joint; a plurality of light sources are evenly arranged on the fixing rod; a shed structure is formed together with the connecting rod and the support rod; partition blocks are arranged in the soil layer inside the shed structure formed by the connecting rod and the support rod; the partition blocks divide the internal space of the shed into a water channel structure, the water channel structure is a serpentine structure, and the head and tail of the serpentine structure are L-shaped and interconnected; a plurality of seedling raising boxes are arranged in the water channel, the seedling raising boxes are circular structures, and are made of foam boards.

[0008] Preferably, a water pipe is fixedly provided at the bottom of the water channel, the water pipe is located in the middle of the water channel and has the same shape as the water channel; connected nozzles are evenly distributed and fixed on the water pipe, and the direction of the nozzles is the flow direction of water in the water channel.

[0009] Preferably, one or more circulation pumps are arranged in the soil layer at one end of the shed structure, and the output end and input end of the circulation pump are connected by a circulation pipe; one or more water suction ports are opened at the bottom of the water channel; one end of the circulation pipe is connected to the water suction port from the soil layer, and the other end is connected to the water pipe.

[0010] Preferably, a first filter plate is provided at the position where the circulation pipe is connected to the water channel; and a cover plate is provided above the circulation pump.

[0011] Preferably, a drainage groove is opened at the other end of the shed structure, and the bottom of the drainage groove is connected to the external drainage ditch; a second filter plate is arranged in the middle of the drainage groove; the spacer block is opened with a first slot and a second slot near the drainage groove; a baffle is inserted in the first slot or the second slot.

[0012] Preferably, the light sources in the same column of the fixing rods along the length direction of the shed body are of the same color, and the light sources in the same row along the width direction of the shed body are of blue, red and white colors respectively.

[0013] Preferably, the inner wall of the partition block is coated with a waterproof coating; and the outer surface of the seedling box is provided with a smooth coating.

[0014] Preferably, the spacers are each provided with an L-shaped blowing pipe corresponding to the right-angle bend of the water channel, and the wind direction of the L-shaped blowing pipe is the water flow direction in the water channel.

[0015] Preferably, a method for promoting the growth of eggplant seedlings based on regulating light sources comprises the following steps: S1: Use support rods and connecting rods to build a planting greenhouse in the farmland, fix the light source on the top of the greenhouse, dig a serpentine canal at the bottom of the greenhouse, and fix a water pipe equipped with a sprinkler in the canal; S2: The baffle plate and the second slot are used to make the water channel a loop state, and water is added into the water channel so that the liquid level is higher than the height of the nozzle; S3: Use a circulation pump to suck the water inside the canal into the water pipe, and then discharge it back into the canal from the nozzle, and use the nozzle to drive the water in the canal to flow in a directional manner; S4: placing the seedling boxes with eggplant seedlings planted in advance in the canal from the greenhouse field in sequence, and using the buoyancy of the seedling boxes to move them in the canal until all the seedling boxes are placed in the canal; S5: Keep the circulation pump running normally, and the water body carrying the seedling box moves continuously under the light source in the greenhouse, so that each eggplant seedling receives sufficient light; S6: After the eggplant seedlings have grown, the baffle is inserted into the first slot to disconnect the circuit state of the water channel, so that the water channel is connected to the drainage trough, and new water is added to the water channel to keep the liquid level in the water channel unchanged; S7: Using the flow of water, the floating seedling boxes are sequentially moved into the drainage trough, and the operators sequentially take out the seedling boxes that have entered the drainage trough; S8: After all the seedling boxes are taken out, add water to the canal to cultivate a new batch of eggplant seedlings.

[0016] Preferably, in step S4, the eggplant seedlings are cultivated by soilless culture, and bacterial agents or fertilizers are added to the water in the canal to provide nutrients for the eggplant seedlings.

[0017] Beneficial effects of the present invention: The present invention utilizes water to float a seedling raising box made of a foam board material on a liquid surface line. Since the water flows directionally inside a water channel, the seedling raising box can move with the water when floating on the water, and then it is convenient for operators to place the seedling raising boxes in the water channel one by one. After all the seedling raising boxes are placed inside the water channel, the normal operation of the circulation pump is maintained to keep the water flowing, thereby making the seedling raising box move continuously inside the greenhouse. Through the continuous movement of the eggplant seedlings, they can be irradiated by light sources at various angles inside the greenhouse, and through the adjustment of the light source, each eggplant seedling can fully receive the favorable illumination of light sources with different color combinations at different development stages, not only does it not need to deliberately adjust the irradiation angle of the light, but it will also not be locally damaged.

[0018] The seedling raising method adopted by the present invention adopts soilless cultivation. A seedling raising matrix is ​​added to a seedling raising box, and then the nutrients in the seedling raising matrix and the water body are used to provide the eggplant seedlings with the nutrients required for growth. When it is necessary to add fungal agents or fertilizers to the eggplant seedlings later, they can be directly added to the water body in the canal and directly absorbed by the root system of the eggplant seedlings, which is convenient and quick.

[0019] When the present invention regulates the light source for eggplant seedlings to promote their growth, the light intensity of three columns of light sources with different colors is controlled to form a combined light to provide lighting conditions for the eggplant seedlings under the shed. In combination with movable eggplant seedlings, different and sufficient light quality sources can be provided for the eggplant seedlings, thereby promoting their growth. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 is a top view of the first embodiment of the present invention; Figure 3 is a schematic structural diagram of a water channel in Embodiment 1 of the present invention; Figure 4 yes Figure 3 A partial enlarged view of the center Figure 5 is a cross-sectional view of the first embodiment of the present invention; Figure 6 is a schematic diagram of the structure of a water pipe in Embodiment 1 of the present invention; Figure 7 It is a structural schematic diagram of a seedling raising box in Embodiment 1 of the present invention; Figure 8 It is a structural schematic diagram of a light source in the second embodiment of the present invention.

[0022] In the figure: 1. support rod; 2. connecting rod; 3. joint; 4. fixing rod; 5. light source; 6. partition block; 7. water channel; 8. water pipe; 9. nozzle; 10. circulation pipe; 11. circulation pump; 12. water suction port; 13. seedling box; 14. first filter plate; 15. cover plate; 16. first slot; 17. second slot; 18. baffle; 19. drainage trough; 20. second filter plate; 21. blow pipe. DETAILED DESCRIPTION

[0023] The following will be combined with 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.

[0024] Embodiment 1: See also Figure 1-Figure 2As shown, a device and method for promoting the growth of eggplant seedlings based on regulating light sources include a plurality of support rods 1 evenly distributed and fixedly inserted in a farmland soil layer, wherein the support rods 1 are in an arched structure; a plurality of connecting rods 2 are connected to the support rods 1 via joints 3, and the connecting rods 2 and the support rods 1 together form a shed structure, on which a heat-insulating film is provided; a fixing rod 4 is connected to the support rod 1 at the middle top via a joint 3, and the fixing rod 4 is equal in length to the shed structure; a plurality of light sources 5 are evenly distributed on the fixing rod 4, and the light source 5 is used to provide light conditions for the growth of eggplants.

[0025] Please refer again Figure 1-Figure 3 As shown, a partition block 6 is embedded in the soil layer inside the shed structure formed by the connecting rod 2 and the supporting rod 1, and the side wall of the partition block 6 is coated with a waterproof coating, such as: epoxy resin waterproof coating, cement-based waterproof coating and acrylic waterproof coating; the partition block 6 divides the internal space of the shed into a channel 7 structure, and the channel 7 structure is a serpentine structure, and the head and tail of the serpentine structure are L-shaped and interconnected.

[0026] Please refer again Figure 5 and Figure 6 As shown, a water pipe 8 is fixedly installed at the bottom of the water channel 7. The water pipe 8 is located in the middle of the water channel 7 and has the same shape as the water channel 7. The water pipe 8 is evenly and fixedly connected with connected nozzles 9. The angle between the nozzle 9 and the water pipe 8 is 10°-60°, and the direction of the nozzle 9 is the flow direction of water in the water channel 7.

[0027] Please refer again Figure 3 and Figure 4 As shown, one or more circulation pumps 11 are arranged in the soil layer at one end of the shed structure, and the output end and the input end of the circulation pump 11 are connected with a circulation pipe 10; one or more water suction ports 12 are opened at the bottom of the canal 7; one end of the circulation pipe 10 is connected with the water suction port 12 from the soil layer, and the other end is connected with the water pipe 8; a first filter plate 14 is arranged at the position where the circulation pipe 10 is connected with the canal 7; a cover plate 15 for protection is arranged above the circulation pump 11.

[0028] Please refer again Figure 2 and Figure 6 As shown, a drainage groove 19 is opened at the other end of the shed structure, and the bottom of the drainage groove 19 is connected to the external drainage ditch; a second filter plate 20 is mounted in the middle of the drainage groove 19.

[0029] The spacer block 6 is provided with a first slot 16 and a second slot 17 at a position close to the drain groove 19 ; a baffle 18 is inserted into the first slot 16 or the second slot 17 .

[0030] An L-shaped blowing pipe 21 is provided at each of the spacers 6 corresponding to the right-angle bends of the water channel 7 , and the wind direction of the L-shaped blowing pipe 21 is the water flow direction in the water channel 7 .

[0031] Please refer again Figure 7 As shown, a plurality of seedling boxes 13 are arranged in the canal 7. The seedling boxes 13 are circular in structure and made of foam boards for growing eggplant seedlings. A smooth coating is arranged on the outer surface of the seedling boxes 13 to reduce the friction between the walls of the canal 7 and the seedling boxes 13 .

[0032] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below: Before starting eggplant seedlings: First, a planting greenhouse is built using support rods 1, connecting rods 2 and joints 3, and then a fixing rod 4 is set on the top of the greenhouse. Multiple fixing rods can be set, and a light source 5 is set on the fixing rod 4, such as an LED lamp, a high-pressure sodium lamp, a halogen lamp and a solar fill light. Next, the baffle 18 is inserted into the second slot 17 to ensure that the water channel 7 forms a closed loop. Then, water is added to the water channel 7 so that the liquid level inside the water channel 7 exceeds the upper end of the nozzle 9. Then, the circulating pump 11 is used to suck the water inside the water channel 7 into the water pipe 8, and then it is discharged from the nozzle 9 to the water channel 7 again, and the nozzle 9 is used to drive the water in the water channel 7 to flow in a directional manner.

[0033] It is worth noting here that: since the water pipe 8 is long, a single circulation pump 11 cannot ensure that the water output of each nozzle 9 is the same, and therefore a plurality of circulation pumps 11 can be provided to connect the water pipe 8 together to ensure that each nozzle 9 outputs water evenly and that the water flow velocity inside the water channel 7 tends to be the same; in addition, since the interior of the water channel 7 is interconnected, when the circulation pipe 10 pumps water into the water channel 7, the water drops as a whole and will not affect the flow direction of the water. Since the circulation pipe 10 is connected to the interior of the water channel 7 through the water pipe 8 and the nozzle 9, the liquid level line inside the water channel 7 will not drop.

[0034] When using light sources for eggplant seedling cultivation: The eggplant seedlings are planted in a circular seedling box 13, and then the seedling boxes 13 are placed in the water channel 7 at the end of the greenhouse. The foam board is floated on the liquid surface by the water. At this time, since the water flows directionally in the water channel 7, the seedling boxes 13 can move with the water when floating on the water, and then it is convenient for the operators to place the seedling boxes 13 in the water channel 7 in sequence. After all the seedling boxes 13 are placed in the water channel 7, the normal operation of the circulation pump 11 is maintained to keep the water flowing, so that the seedling boxes 13 are continuously moved in the greenhouse. At this time, since the eggplant seedlings are constantly moving, they can be irradiated by the light source 5 at various angles, so that each eggplant seedling is fully exposed to light, and not only does it not need to deliberately adjust the irradiation angle of the light, but it will also not be locally damaged.

[0035] When the seedling raising box 13 reaches the turning point in the water channel 7, the setting of the blowing pipe 21 can help the seedling raising box 13 to move and avoid getting stuck.

[0036] It is worth noting here that the seedling cultivation method adopted by the present invention adopts soilless cultivation, by adding a seedling matrix into the seedling box 13, and then using the nutrients in the seedling matrix and the water body to provide the eggplant seedlings with the nutrients required for growth. When it is necessary to add fungal agents or fertilizers to the eggplant seedlings in the future, they can be directly added to the water body in the canal 7 and directly absorbed by the root system of the eggplant seedlings, which is convenient and quick.

[0037] When the eggplant seedlings are finished: Take out the baffle 18 from the second slot 17 and insert it into the first slot 16, disconnect the loop state of the canal 7, let the water flow out of the drainage trough 19, and start to introduce water into the canal 7, keep the liquid level in the canal 7 stationary, and then use the flow of water to make the floating seedling boxes 13 enter the drainage trough 19 one by one and stay on the second filter plate 20. At this time, the operator can take them away one by one, which is convenient and quick. After all the seedling boxes 13 are taken out, stop adding water to the canal 7 until the water flows out of the drainage trough 19. After that, water can be added again to cultivate a new batch of eggplant seedlings.

[0038] In summary, the method for regulating the growth of eggplant seedlings using light sources comprises the following steps: S1: A planting greenhouse is built in the farmland using support rods 1 and connecting rods 2, a light source 5 is fixed on the top of the greenhouse, a serpentine-shaped water channel 7 is dug at the bottom of the greenhouse, and a water pipe 8 equipped with a sprinkler 9 is fixed in the water channel 7; S2: The baffle 18 and the second slot 17 are used to make the water channel 7 a loop state, and water is added into the water channel 7 so that the liquid level is higher than the height of the nozzle 9; S3: Use the circulation pump 11 to suck the water in the water channel 7 into the water pipe 8, and then discharge it back into the water channel 7 from the nozzle 9, and use the nozzle 9 to drive the water in the water channel 7 to flow in a directional manner; S4: placing the seedling boxes 13 with eggplant seedlings planted in advance in the water channel 7 from the greenhouse field in sequence, and using the buoyancy of the seedling boxes 13 to move them in the water channel 7 until all the seedling boxes 13 are placed in the water channel 7; S5: Keep the circulation pump 11 running normally, and the water body carries the seedling box 13 to move continuously under the light source 5 in the greenhouse, so that each eggplant seedling is exposed to sufficient light; S6: After the eggplant seedlings have grown, the baffle 18 is inserted into the first slot 16 to disconnect the circuit state of the water channel 7, so that the water channel 7 is connected to the drainage trough 19, and new water is added to the water channel 7 to keep the liquid level in the water channel 7 unchanged; S7: Using the flow of water, the floating seedling boxes 13 are sequentially moved into the drainage trough 19, and the operators sequentially take out the seedling boxes 13 that have entered the drainage trough 19; S8: After all the seedling boxes 13 are taken out, water is added to the water channel 7 to cultivate a new batch of eggplant seedlings.

[0039] Embodiment 2: Please refer again Figure 8 As shown, the present invention is a device and method for promoting the growth of eggplant seedlings based on regulating light sources. The structure of this embodiment is basically the same as that of embodiment 1. The difference is that, in this embodiment, the support rods 1 located at the middle top and the tops on both sides are connected to fixed rods 4 through joints, and multiple light sources 5 are evenly distributed on the fixed rods 4. The light sources 5 in the same column along the length direction of the shed are of the same color, and the colors of the light sources 5 in the same row along the width direction of the shed are blue, red and white respectively. The light sources 5 are used to regulate the growth of the eggplant seedlings, wherein the combined light ratio of the light sources 5 in the same row is: red / blue / white = 10 / 4 / 9.

[0040] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation mode of the present invention in the actual process is described in detail below: When the light source is adjusted to promote the growth of the eggplant seedlings, the light intensity of the three columns of light sources 5 with different colors is controlled to form a combined light to provide lighting conditions for the eggplant seedlings under the shed. With the movable eggplant seedlings, different and sufficient light quality sources can be provided for the eggplant seedlings, thereby promoting the growth of the eggplant seedlings. Among them, red light promotes the growth of eggplant seedlings, especially promotes flowering and fruiting, can stimulate the photosynthesis and growth rate of plants, and increase the thickness of the stems of eggplant seedlings; blue light helps the growth of plant leaves, promotes photosynthesis, improves the structural development of plants, and improves the disease and insect resistance of plants; white light provides a comprehensive spectrum, supplements the deficiencies of red light and blue light, regulates the overall growth of plants, and maintains the balanced development of plants.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] 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 device for promoting the growth of eggplant seedlings based on regulating light sources, comprising a support rod (1) and a connecting rod (2); the support rod (1) is connected to a fixing rod (4) via a joint (3); a plurality of light sources (5) are evenly distributed on the fixing rod (4); Features: The connecting rod (2) and the supporting rod (1) together form a shed structure; a spacer (6) is arranged in the soil layer inside the shed structure formed by the connecting rod (2) and the supporting rod (1); The spacer (6) divides the internal space of the shed into a water channel (7) structure, and the water channel (7) structure is a serpentine structure, and the head and tail of the serpentine structure are L-shaped and interconnected; A plurality of seedling raising boxes (13) are arranged in the water channel (7); the seedling raising boxes (13) are circular in structure and are made of foam boards.

2. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 1, characterized in that: A water pipe (8) is fixedly arranged at the bottom of the water channel (7), the water pipe (8) is located in the middle of the water channel (7) and has the same shape as the water channel (7); connected nozzles (9) are evenly distributed and fixedly connected to the water pipe (8), and the direction of the nozzles (9) is the flow direction of water in the water channel (7).

3. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 1, characterized in that: One or more circulation pumps (11) are arranged in the soil layer at one end of the shed structure, and the output end and the input end of the circulation pump (11) are connected to a circulation pipe (10); One or more water inlets (12) are provided at the bottom of the water channel (7); one end of the circulation pipe (10) is connected to the water inlet (12) through the soil layer, and the other end is connected to the water pipe (8).

4. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 3, characterized in that: A first filter plate (14) is provided at a position where the circulation pipe (10) is connected to the water channel (7); and a cover plate (15) is provided above the circulation pump (11).

5. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 1, characterized in that: A drainage groove (19) is provided at the other end of the shed structure, and the bottom of the drainage groove (19) is connected to an external drainage ditch; a second filter plate (20) is provided in the middle of the drainage groove (19); The spacer (6) is provided with a first slot (16) and a second slot (17) at a position close to the drainage groove (19); a baffle (18) is inserted into the first slot (16) or the second slot (17).

6. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 5, characterized in that: The light sources (5) in the same row of the fixing rods (4) along the length direction of the shed body are of the same color, and the light sources (5) in the same row along the width direction of the shed body are of blue, red and white colors respectively.

7. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 1, characterized in that: The inner wall of the spacer (6) is coated with a waterproof coating; and the outer surface of the seedling box (13) is provided with a smooth coating.

8. The device for promoting the growth of eggplant seedlings based on regulating light source according to claim 1, characterized in that: The spacers (6) are each provided with an L-shaped blowing pipe (21) at a right-angle turn corresponding to the water channel (7), and the wind direction of the L-shaped blowing pipe (21) is the direction of water flow in the water channel (7).

9. A method for promoting the growth of eggplant seedlings based on regulating light sources, applicable to the device for promoting the growth of eggplant seedlings based on regulating light sources as described in any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Using support rods (1) and connecting rods (2) to build a planting greenhouse in a farmland, fixing a light source (5) on the top of the greenhouse, digging a serpentine-structured water channel (7) at the bottom of the greenhouse, and fixing a water pipe (8) equipped with a sprinkler (9) in the water channel (7); S2: using the baffle (18) and the second slot (17) to make the water channel (7) a loop state, adding water into the water channel (7) so that the liquid level is higher than the height of the nozzle (9); S3: using a circulation pump (11) to draw water from the water channel (7) into the water pipe (8), and then discharging the water from the nozzle (9) back into the water channel (7), and using the nozzle (9) to drive the water in the water channel (7) to flow in a directional manner; S4: placing the seedling raising boxes (13) in which the eggplant seedlings have been planted in advance in the water channel (7) from the greenhouse field in sequence, and using the buoyancy of the seedling raising boxes (13) to move them in the water channel (7) until all the seedling raising boxes (13) are placed in the water channel (7); S5: Keep the circulation pump (11) running normally, and the water body carries the seedling box (13) and moves continuously under the light source (5) in the greenhouse, so that each eggplant seedling receives sufficient light; S6: After the eggplant seedlings have finished growing, the baffle (18) is inserted into the first slot (16), the circuit state of the water channel (7) is disconnected, the water channel (7) is connected to the drainage trough (19), and new water is added to the water channel (7), so that the liquid level in the water channel (7) remains unchanged; S7: using the flow of water to make the floating seedling boxes (13) enter the drainage trough (19) in sequence, and the operator takes out the seedling boxes (13) entering the drainage trough (19) in sequence; S8: After all the seedling boxes (13) are taken out, water is added to the water channel (7) to cultivate a new batch of eggplant seedlings.

10. The method for promoting the growth of eggplant seedlings based on regulating light source according to claim 9, characterized in that: In the step S4, the eggplant seedlings are cultivated by soilless culture, and bacterial agents or fertilizers are added to the water in the canal (7) to provide nutrients for the eggplant seedlings.

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