A high-density seedling raising system of layering racks for grafting scions

Abstract

This invention relates to the field of plant seedling cultivation technology, and more particularly to a tiered, high-density seedling cultivation system for grafted scions. The technical solution includes a base plate and mounting columns. The mounting columns are symmetrically fixed on both sides of the base plate. Multiple seedling racks are slidably mounted on the mounting columns, and multiple seedling troughs are formed on each seedling rack. A heating plate is slidably mounted within each seedling trough. A guide mechanism for pushing the heating plate out is provided within the seedling rack. An auxiliary mechanism for evenly watering and fertilizing the seeds in the seedling troughs is provided on the base plate. This invention achieves uniform watering and fertilization during seedling cultivation, significantly improving the survival rate, efficiency, and space utilization of grafted seedlings.

Description

Technical Field

[0001] This invention relates to the field of plant seedling technology, and in particular to a layered high-density seedling system for grafted scions. Background Technology

[0002] Grafting seedling cultivation is an important technical means in agricultural production to improve crop resistance, yield, and quality, and it is widely used in the cultivation of fruits, vegetables, and economic forest trees. The seedling stage of grafting scions has strict requirements for growth environment, water and fertilizer supply, and transplant protection, which directly affect the survival rate and growth status of the scions after grafting. Therefore, the rationality and practicality of the seedling cultivation device play a key role in the effectiveness of grafting seedling cultivation.

[0003] Regarding water and fertilizer supply, existing seedling raising devices mostly employ manual irrigation or fixed sprinkler spraying. Manual irrigation is inefficient, labor-intensive, and cannot guarantee the uniformity of water and fertilizer, easily leading to localized waterlogging, fertilizer damage, or nutrient deficiency. This results in poor uniformity of grafted scion growth, further affecting subsequent grafting results. In addition, existing devices often use a single rotary stirring method for mixing fertilizer and water, which easily causes water-soluble fertilizer to settle and cannot achieve uniform dissolution, further exacerbating the imbalance in water and fertilizer supply. In the transplanting and seedling collection stage, the root system of grafted scions is fragile, and the callus tissue is not yet fully stable. Existing seedling raising devices mostly lack dedicated seedling collection mechanisms, relying on manual digging to collect seedlings, which easily damages the root system and callus tissue, resulting in a significant reduction in grafting survival rate and very low seedling collection efficiency. Therefore, this application proposes a layered high-density seedling raising system for grafted scions. Summary of the Invention

[0004] The purpose of this invention is to address the problems of uneven fertilization and watering and low seedling extraction efficiency in the prior art by proposing a layered high-density seedling cultivation system for grafted scions.

[0005] The technical solution of the present invention: a layered high-density seedling raising system for grafted scions, comprising a base plate and mounting columns, wherein the mounting columns are symmetrically fixedly installed on both sides of the base plate, and multiple seedling racks are slidably installed on the mounting columns, wherein multiple seedling troughs are opened on the seedling racks, wherein heating plates are slidably installed in the seedling troughs, and a guide mechanism for pushing out the heating plates is provided in the seedling racks, and an auxiliary mechanism for uniformly watering and fertilizing the seeds in the seedling troughs is provided on the base plate.

[0006] Optionally, the guiding mechanism includes a first guide block fixedly installed at the bottom of the heating plate, the bottom sides of the first guide block being cut-out surfaces; a connecting plate fixedly installed inside the seedling trough; a first spring fixedly installed on the connecting plate; one end of the first spring being fixedly connected to the bottom of the heating plate; a push plate slidably installed inside the seedling trough; a second guide block fixedly installed on the push plate; the sides of the second guide block being cut-out surfaces, the cut-out surfaces of the second guide block fitting against the cut-out surfaces of the first guide block.

[0007] Optionally, the auxiliary mechanism includes a storage tank fixedly installed on one side of the mounting column, a fixing block fixedly installed on one side of the mounting column, a first mounting frame fixedly installed on the fixing block, a threaded rod rotatably installed in the first mounting frame, a second mounting frame slidably installed on the first mounting frame, the second mounting frame being threadedly connected to the threaded rod, a first reciprocating screw rotatably installed on the second mounting frame, a slider slidably installed on the second mounting frame, the slider being threadedly connected to the first reciprocating screw, the slider being hollow, an installation cavity fixedly installed on one side of the slider, the installation cavity being hollow, multiple guide plates fixedly installed on the installation cavity, the guide plates being hollow, multiple nozzles fixedly installed at the bottom of the guide plates, a second reciprocating screw rotatably installed in the storage tank, an electric turntable slidably installed in the storage tank, the electric turntable being threadedly connected to the second reciprocating screw, a stirring rod fixedly installed at the bottom of the electric turntable, and a connecting pipe fixedly installed at the bottom of the storage tank, one end of the connecting pipe communicating with the installation cavity.

[0008] Optionally, an installation plate is fixedly installed on one side of the seedling rack, a limiting post is slidably installed inside the installation plate, a pressure plate is fixedly installed at one end of the limiting post, a plurality of limiting holes are opened on one side of the installation post, the other end of the limiting post is located in the limiting hole, a second spring is sleeved on the limiting post, and one end of the second spring is fixedly connected to the pressure plate.

[0009] Optionally, a push block is fixedly installed at one end of the push plate, and the push block is provided with anti-slip texture.

[0010] Optionally, a first motor is fixedly mounted on one end of the first mounting frame, and the output shaft of the first motor is fixedly connected to the threaded rod.

[0011] The second mounting frame has a guide groove, and the first reciprocating screw is located in the guide groove.

[0012] Optionally, a second motor is fixedly mounted on one end of the second mounting frame, and the output shaft of the second motor is fixedly connected to the first reciprocating lead screw.

[0013] Optionally, a limiting plate is slidably installed inside the liquid storage tank, and limiting rods are fixedly installed on both sides of the limiting plate. A connecting pipe is provided inside the liquid storage tank, and the limiting rods are slidably connected to the connecting pipe. The limiting plate is fixedly connected to the electric turntable.

[0014] Optionally, a third motor is fixedly installed on the liquid storage tank, and the output shaft of the third motor is fixedly connected to the second reciprocating lead screw.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This invention converts the horizontal thrust of the pusher plate into the vertical lift of the heating plate through the precise fit of the first guide block and the second guide block. It eliminates the need for complex power components, has a simple structure, high transmission efficiency, and low failure rate. It is suitable for the humid seedling environment of greenhouses. A single pusher plate can simultaneously push out the heating plates in multiple seedling troughs, enabling the removal of multiple scions at once. Compared with manual digging of individual scions, it improves the efficiency of seedling removal and avoids root damage from the source, significantly improving the grafting survival rate.

[0016] Furthermore, the stirring rod can both rotate and reciprocate vertically with the electric turntable, achieving three-dimensional mixing. This improves the uniformity of fertilizer and water mixing, avoids localized fertilizer damage or nutrient deficiency, and is adapted to the precise nutrient requirements of grafted scions. The threaded rod drives the second mounting frame to move horizontally, achieving precise alignment of the guide plate above the seedling rack. The first reciprocating screw drives the slider to reciprocate horizontally, causing the nozzle to sweep and spray evenly along the width of the seedling rack, achieving full coverage of fertilizer and water spraying. This ensures uniform water and fertilizer supply to each layer and column of seedling troughs, preventing growth differences in grafted scions due to uneven water and fertilizer distribution.

[0017] Furthermore, through the cooperation of the limiting post, the second spring, and the mounting plate, the fixing can be released simply by pulling the limiting post inward. After adjusting the layer height, the limiting post is released, and the second spring resets and pushes the limiting post into the corresponding limiting hole to complete the fixing. No tools are required, and the operation efficiency is high. The layer spacing can be flexibly adjusted according to the height requirements of different growth stages of the grafted scion, avoiding space waste or growth restriction caused by fixed layer height, and further improving the rationality of high-density seedling cultivation.

[0018] This invention achieves uniformity in watering and fertilizing during seedling cultivation, significantly improving the survival rate, efficiency, and space utilization of grafted seedlings. Attached Figure Description

[0019] Figure 1 Schematic diagram of a layered high-density seedling cultivation system for grafted scions Figure 1 ; Figure 2 Schematic diagram of a layered high-density seedling cultivation system for grafted scions Figure 2 ; Figure 3Schematic diagram of a layered high-density seedling cultivation system for grafted scions Figure 3 ; Figure 4 This is a schematic diagram of the internal structure of the liquid storage tank; Figure 5 for Figure 3 A magnified schematic diagram of the partial structure at point A in the middle; Figure 6 for Figure 2 A magnified schematic diagram of the local structure at point B; Figure 7 for Figure 1 A magnified schematic diagram of the structure at point C.

[0020] Reference numerals: 1. Base plate; 2. Mounting column; 3. Seedling rack; 4. Seedling trough; 5. Heating plate; 6. First guide block; 7. Connecting plate; 8. First spring; 9. Push plate; 10. Second guide block; 11. Push block; 12. Mounting plate; 13. Second spring; 14. Limiting column; 15. Limiting hole; 16. Pressure plate; 17. Fixing block; 18. Threaded rod; 19. First mounting frame; 20. First motor; 21. Second mounting frame; 22. First reciprocating screw; 23. Slider; 24. Mounting cavity; 25. Guide plate; 26. Nozzle; 27. Third motor; 28. Connecting pipe; 29. ​​Second reciprocating screw; 30. Limiting plate; 31. Electric turntable; 32. Stirring rod; 33. Limiting rod; 34. Second motor; 35. Storage tank; 36. Guide groove. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] The components of the embodiments of the invention described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0023] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] It should be noted that 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. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Example 1 like Figure 1 , Figure 2 and Figure 3 As shown, the present invention proposes a layered high-density seedling raising system for grafted scions, including a base plate 1 and mounting columns 2. The mounting columns 2 are symmetrically fixed on both sides of the base plate 1. Multiple seedling racks 3 are slidably mounted on the mounting columns 2. Multiple seedling troughs 4 are opened on the seedling racks 3 for placing seeds to be raised. A heating plate 5 is slidably mounted in the seedling troughs 4. The heating plate 5 has a built-in heating resistor to heat the seedling seeds. A guide mechanism for pushing out the heating plate 5 is provided in the seedling racks 3. An auxiliary mechanism for evenly watering and fertilizing the seeds in the seedling troughs 4 is provided on the base plate 1.

[0028] like Figure 3-5As shown, the guiding mechanism includes a first guide block 6 fixedly installed at the bottom of the heating plate 5. The bottom sides of the first guide block 6 are cut surfaces. A connecting plate 7 is fixedly installed inside the seedling trough 4. A first spring 8 is fixedly installed on the connecting plate 7. One end of the first spring 8 is fixedly connected to the bottom of the heating plate 5. A push plate 9 is slidably installed inside the seedling trough 4. A second guide block 10 is fixedly installed on the push plate 9. The sides of the second guide block 10 are cut surfaces. The cut surfaces of the second guide block 10 fit against the cut surfaces of the first guide block 6. When the plant to be grafted needs to be removed, the push plate 9 is pushed inward. The cut surfaces of the second guide block 10 on the push plate 9 press against the cut surfaces of the first guide block 6. As the second guide block 10 moves continuously, the first guide block 6 drives the heating plate 5 to move upward. Multiple first heating plates 5 drive multiple plants in the seedling trough 4 to move upward, removing them from the seedling trough 4. This avoids damage to the plant roots from manual digging, improves the grafting survival rate, and increases transplanting efficiency.

[0029] Example 2 like Figure 4-7As shown, the auxiliary mechanism includes a liquid storage tank 35 fixedly installed on one side of the mounting column 2. A fixing block 17 is fixedly installed on one side of the mounting column 2. A first mounting frame 19 is fixedly installed on the fixing block 17. A threaded rod 18 is rotatably installed inside the first mounting frame 19. A second mounting frame 21 is slidably installed on the first mounting frame 19 and threadedly connected to the first threaded rod 18. A first reciprocating screw 22 is rotatably installed on the second mounting frame 21. A slider 23 is slidably installed on the second mounting frame 21 and threadedly connected to the first reciprocating screw 22. The slider 23 is hollow. One side of the slider 23 is fixedly installed... A mounting cavity 24 is fixedly installed, which is a hollow cavity. Multiple guide plates 25 are fixedly installed on the mounting cavity 24. Multiple nozzles 26 are fixedly installed at the bottom of the guide plates 25. A second reciprocating screw 29 is rotatably installed inside the storage tank 35. An electric turntable 31 is slidably installed inside the storage tank 35 and threadedly connected to the second reciprocating screw 29. A stirring rod 32 is fixedly installed at the bottom of the electric turntable 31. A connecting pipe 28 is fixedly installed at the bottom of the storage tank 35, with one end of the connecting pipe 28 communicating with the mounting cavity 24. When fertilization of the plants is required, the storage tank 35 is... Add water and water-soluble fertilizer, rotate the second reciprocating screw 29. The second reciprocating screw 29 drives the electric turntable 31 to make vertical reciprocating motion in the storage tank 35. Start the electric turntable 31, which drives the stirring rods 32 on both sides to rotate. This allows the stirring rods 32 to both make vertical reciprocating motion and rotate in the storage tank 35, so that the water-soluble fertilizer inside is fully dissolved, improving the uniformity of fertilizer concentration and facilitating subsequent fertilization. When fertilization is needed, rotate the threaded rod 18. The threaded rod 18 drives the second mounting frame 21 to move, moving the mounting cavity 24 to one side of the seedling rack 3 until the guide plate 25 moves to the seedling rack 3. Above, the first reciprocating screw 22 is rotated, which drives the slider 23 to make horizontal reciprocating motion on the second mounting frame 21. The valve of the storage tank 35 is opened, and the fertilizer solution in the storage tank 35 is transported to the mounting cavity 24 through the connecting pipe 28, and then from the mounting cavity 24 to the guide plate 25. Finally, it is sprayed out by the nozzle 26. With the guide plate 25 making horizontal reciprocating motion on the seedling rack 3, the fertilizer solution sprayed by the nozzle 26 can be evenly sprayed into the seedling trough 4 in the seedling rack 3. When watering is needed, the storage tank 35 only needs to be filled with water to complete the watering, thus achieving uniform watering and fertilization.

[0030] Example 3 like Figure 2-6As shown, an installation plate 12 is fixedly installed on one side of the seedling rack 3. A limiting post 14 is slidably installed inside the installation plate 12. A pressure plate 16 is fixedly installed on one end of the limiting post 14. Multiple limiting holes 15 are opened on one side of the installation post 2. The other end of the limiting post 14 is located in the limiting hole 15. A second spring 13 is sleeved on the limiting post 14. One end of the second spring 13 is fixedly connected to the pressure plate 16. When it is necessary to adjust the distance between the seedling racks 3, the limiting post 14 is moved inward to pull out the limiting hole 15, thus canceling the fixation of the seedling rack 3. After adjusting the distance between the seedling racks 3 according to the height of the plants, one end of the limiting post 14 is inserted into the limiting hole 15 to complete the fixation of the seedling rack 3.

[0031] like Figure 1 , Figure 4 and Figure 7 As shown, a push block 11 is fixedly installed at one end of the push plate 9. The push block 11 is provided with anti-slip texture. A first motor 20 is fixedly installed at one end of the first mounting frame 19. The output shaft of the first motor 20 is fixedly connected to the threaded rod 18. When the first motor 20 is started, the output shaft of the first motor 20 drives the threaded rod 18 to rotate. A guide groove 36 is opened on the second mounting frame 21. The first reciprocating screw 22 is located in the guide groove 36. A second motor 34 is fixedly installed at one end of the second mounting frame 21. The output shaft of the second motor 34 is fixedly connected to the first reciprocating screw 22. When the first motor 20 is started, the output shaft of the second motor 34 drives the threaded rod 18 to rotate. Two motors 34 are used. The output shaft of the second motor 34 drives the first reciprocating lead screw 22 to rotate. A limit plate 30 is slidably installed inside the liquid storage tank 35. Limit rods 33 are fixedly installed on both sides of the limit plate 30. A connecting pipe 28 is opened inside the liquid storage tank 35. The limit rods 33 are slidably connected to the connecting pipe 28. The limit plate 30 is fixedly connected to the electric turntable 31. A third motor 27 is fixedly installed on the liquid storage tank 35. The output shaft of the third motor 27 is fixedly connected to the second reciprocating lead screw 29. When the third motor 27 is started, the output shaft of the third motor 27 drives the second reciprocating lead screw 29 to rotate.

[0032] Working principle: When fertilization is needed, add water and water-soluble fertilizer to the storage tank 35. Rotate the second reciprocating screw 29, which drives the electric turntable 31 to perform vertical reciprocating motion within the storage tank 35. Start the electric turntable 31, which drives the stirring rods 32 on both sides to rotate, allowing the stirring rods 32 to both perform vertical reciprocating motion and rotate within the storage tank 35. This ensures that the water-soluble fertilizer is fully dissolved, improving the uniformity of fertilizer concentration and facilitating subsequent fertilization. When fertilization is needed, rotate the threaded rod 18, which drives the second mounting frame 21 to move, moving the mounting cavity 24 to one side of the seedling rack 3 until the guide plate 25 moves above the seedling rack 3. Rotate the first reciprocating screw 22, which drives the slider 23 to perform horizontal reciprocating motion on the second mounting frame 21. Open the valve of the storage tank 35, allowing the water in the storage tank 35 to flow freely. Fertilizer solution is transported to the installation cavity 24 through the connecting pipe 28, then to the guide plate 25, and finally sprayed out by the nozzle 26. The guide plate 25 moves horizontally back and forth on the seedling rack 3, ensuring that the fertilizer solution sprayed by the nozzle 26 is evenly distributed into the seedling troughs 4 within the seedling rack 3. When watering is needed, simply fill the storage tank 35 with water to complete the watering, achieving uniform watering and fertilization. When it is necessary to remove the grafted plant, push the push plate 9 inward. The cut surface of the second guide block 10 on the push plate 9 presses against the cut surface of the first guide block 6. As the second guide block 10 moves continuously, the first guide block 6 drives the heating plate 5 upward. Multiple first heating plates 5 drive multiple plants in the seedling troughs 4 upward, removing them from the seedling troughs 4. This avoids damage to the plant roots from manual digging, improving graft survival rate and transplanting efficiency.

[0033] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A layered high-density seedling cultivation system for grafted scions, comprising a base plate (1), characterized in that, It also includes mounting columns (2), which are symmetrically fixed on both sides of the base plate (1). Multiple seedling racks (3) are slidably mounted on the mounting columns (2). Multiple seedling troughs (4) are opened on the seedling racks (3). A heating plate (5) is slidably mounted in the seedling troughs (4). A guide mechanism for pushing out the heating plate (5) is provided in the seedling racks (3). An auxiliary mechanism for evenly watering and fertilizing the seeds in the seedling troughs (4) is provided on the base plate (1).

2. The layered high-density seedling cultivation system for grafted scions according to claim 1, characterized in that, The guiding mechanism includes a first guide block (6) fixedly installed at the bottom of the heating plate (5). The bottom sides of the first guide block (6) are cut surfaces. A connecting plate (7) is fixedly installed inside the seedling trough (4). A first spring (8) is fixedly installed on the connecting plate (7). One end of the first spring (8) is fixedly connected to the bottom of the heating plate (5). A push plate (9) is slidably installed inside the seedling trough (4). A second guide block (10) is fixedly installed on the push plate (9). The sides of the second guide block (10) are cut surfaces. The cut surfaces of the second guide block (10) are in contact with the cut surfaces of the first guide block (6).

3. The layered high-density seedling cultivation system for grafted scions according to claim 1, characterized in that, The auxiliary mechanism includes a storage tank (35) fixedly installed on one side of the mounting column (2). A fixing block (17) is fixedly installed on one side of the mounting column (2). A first mounting frame (19) is fixedly installed on the fixing block (17). A threaded rod (18) is rotatably installed inside the first mounting frame (19). A second mounting frame (21) is slidably installed on the first mounting frame (19). The second mounting frame (21) is threadedly connected to the threaded rod (18). A first reciprocating screw (22) is rotatably installed on the second mounting frame (21). A slider (23) is slidably installed on the second mounting frame (21). The slider (23) is threadedly connected to the first reciprocating screw (22). The slider (23) is hollow. A mounting cavity (24) is fixedly installed on one side of the 23), the mounting cavity (24) is a cavity, a plurality of guide plates (25) are fixedly installed on the mounting cavity (24), the guide plates (25) are a cavity, a plurality of nozzles (26) are fixedly installed at the bottom of the guide plates (25), a second reciprocating screw (29) is rotatably installed in the liquid storage tank (35), an electric turntable (31) is slidably installed in the liquid storage tank (35), the electric turntable (31) is threadedly connected to the second reciprocating screw (29), a stirring rod (32) is fixedly installed at the bottom of the electric turntable (31), a connecting pipe (28) is fixedly installed at the bottom of the liquid storage tank (35), and one end of the connecting pipe (28) is connected to the mounting cavity (24).

4. The layered high-density seedling cultivation system for grafted scions according to claim 1, characterized in that, A mounting plate (12) is fixedly installed on one side of the seedling rack (3). A limiting post (14) is slidably installed inside the mounting plate (12). A pressure plate (16) is fixedly installed on one end of the limiting post (14). Multiple limiting holes (15) are opened on one side of the mounting post (2). The other end of the limiting post (14) is located inside the limiting hole (15). A second spring (13) is sleeved on the limiting post (14). One end of the second spring (13) is fixedly connected to the pressure plate (16).

5. The layered high-density seedling cultivation system for grafted scions according to claim 2, characterized in that, A push block (11) is fixedly installed at one end of the push plate (9), and the push block (11) is provided with anti-slip texture.

6. The layered high-density seedling cultivation system for grafted scions according to claim 3, characterized in that, A first motor (20) is fixedly installed at one end of the first mounting frame (19), and the output shaft of the first motor (20) is fixedly connected to the threaded rod (18).

7. The layered high-density seedling cultivation system for grafted scions according to claim 3, characterized in that, The second mounting frame (21) has a guide groove (36), and the first reciprocating screw (22) is located in the guide groove (36).

8. The layered high-density seedling cultivation system for grafted scions according to claim 3, characterized in that, A second motor (34) is fixedly installed at one end of the second mounting frame (21), and the output shaft of the second motor (34) is fixedly connected to the first reciprocating lead screw (22).

9. A layered high-density seedling cultivation system for grafted scions according to claim 3, characterized in that, A limiting plate (30) is slidably installed inside the liquid storage tank (35). Limiting rods (33) are fixedly installed on both sides of the limiting plate (30). A connecting pipe (28) is opened inside the liquid storage tank (35). The limiting rods (33) are slidably connected to the connecting pipe (28). The limiting plate (30) is fixedly connected to the electric turntable (31).

10. A layered high-density seedling cultivation system for grafted scions according to claim 3, characterized in that, A third motor (27) is fixedly installed on the liquid storage tank (35), and the output shaft of the third motor (27) is fixedly connected to the second reciprocating lead screw (29).

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