Plant seedling cultivation device

Abstract

The invention discloses a plant seedling cultivation device which comprises a cultivation box, and a seedling pot is arranged at the upper end of the cultivation box; the cylinder frame is arranged in the center of the seedling pot, and a second nutrition device for guiding the growth of the root system in the frame is connected in the cylinder frame; the branch pipe frames are arranged in the seedling pot and distributed along the periphery of the cylinder frame, a plurality of through holes are distributed in the pipe wall of each branch pipe frame, and a pipe cavity of each branch pipe frame is connected with a first nutrition device for guiding the growth of a pipe cavity root system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plant seedling cultivation, in particular to a plant seedling cultivation device. BACKGROUND

[0002] The quality of plant seedlings directly determines the growth trend, stress resistance and final yield of crops in the later period. Ideal seedling root systems should have strong main roots and developed and evenly distributed lateral root systems to ensure good soil fixation and absorption efficiency. Traditional seedling raising methods (such as plug tray seedling raising) have the following disadvantages: the roots grow freely in the limited space of the plug tray, easily intertwine and entangle, forming harmful structures such as "spiral roots". After transplanting, such root systems are difficult to stretch out, which seriously affects the subsequent growth of crops, resulting in "stiff seedlings". The morphology of the root system is uncontrollable, the root system of the seedling raised by the traditional seedling raising method often develops horizontally, the main root is not prominent, and the seedling has weak wind and drought resistance. When the seedling is taken out of the plug tray, the root system is easily pulled off, causing serious physical damage. Not only does it prolong the hardening-off period, but it also may introduce diseases and reduce the survival rate. Water and fertilizer supply is usually by top-down flooding, which is difficult to precisely control the microenvironment of different areas of the root system and cannot actively guide the root system to develop into an ideal shape.

[0003] Therefore, it is necessary to provide a plant seedling cultivation device to solve the problems in the background art. SUMMARY

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a plant seedling cultivation device, comprising:

[0005] a cultivation box, provided with a seedling pot at the upper end;

[0006] a cylinder frame provided at the center of the seedling pot, and a second nutrient device for guiding the growth of roots in the frame is connected in the frame;

[0007] a branch pipe frame provided inside the seedling pot and distributed along the circumference of the cylinder frame, a plurality of through holes are distributed on the pipe wall, and a first nutrient device for guiding the growth of roots in the pipe cavity is connected in the pipe cavity.

[0008] As a preferred technical scheme of the present application, the pipe cavity of the branch pipe frame is filled with loose substrate.

[0009] As a preferred technical scheme of the present application, the first nutrient device comprises:

[0010] a lifting frame one provided in the cultivation box, and a frame one is installed on the lifting frame one;

[0011] a supply pipe, one end of which is provided with a spray head and extends into the branch pipe frame, and the other end of which is respectively connected with a liquid supply tank one and a gas supply tank one.

[0012] As a preferred embodiment of the present invention, the nozzle includes:

[0013] One column cavity is located at the tail of the nozzle;

[0014] Second column cavity is located at the nozzle head and is connected to first column cavity;

[0015] The nozzle has its tail end sliding in the second column cavity and connected to the tail end of the second column cavity by a spring. Its head slides in the first column cavity, and its head side wall is provided with a spray hole.

[0016] As a preferred embodiment of the present invention, the nozzle end face is provided with a first pressure sensor.

[0017] As a preferred embodiment of the present invention, when the spring is reset, the first nozzle can be located in the second column cavity.

[0018] As a preferred embodiment of the present invention, the second nutrition device includes:

[0019] The second lifting frame is set in the cultivation box, on which a tray base is installed, and on the tray base a column base is installed.

[0020] The sleeve is rotated and fitted onto the upper end of the column base, and is connected to a drive wheel mounted on the column base. The upper end of the sleeve is equipped with a separation blade, and its interior is filled with loose soil.

[0021] The feed tube is fixed in the middle of the column base. Its upper end is fitted with a top cover that seals the upper opening of the sleeve. Its lower outer wall is provided with a feed port that connects to the sleeve cavity. Its inner wall is provided with stirring rods.

[0022] The guide shaft rotates inside the guide cylinder. Its outer wall is fitted with guide screw blades and connected to a drive wheel mounted on a column base.

[0023] As a preferred embodiment of the present invention, the guide shaft is provided with a cylindrical cavity, and the outer wall of the guide shaft is provided with two spray holes connected to the cylindrical cavity. The lower end of the cylindrical cavity is rotatably connected to a rotating pipe, and the rotating pipe is connected to a liquid supply tank two through an inlet one and an air supply tank two through an inlet two.

[0024] As a preferred embodiment of the present invention, a second pressure sensor is provided on the upper surface of the top cover.

[0025] As a preferred embodiment of the present invention, the outer surface of the separating blade is provided with material feeding grooves.

[0026] Compared with the prior art, the present invention provides a plant seedling cultivation device, which has the following beneficial effects:

[0027] 1. This invention constructs a closed-loop control system through a first nutrient device and a second nutrient device, combined with real-time feedback from a pressure sensor. This system can sense the root growth status and dynamically move the nutrient supply point, continuously creating new growth guidance directions. It gradually guides the roots to grow vigorously and evenly in the preset vertical and lateral directions, ultimately forming an ideal, strong root structure with a deep taproot and evenly distributed lateral roots. Seedlings cultivated using this device have a root structure that simulates the optimal growth form of plants in natural soil. The strong vertical taproot ensures the plant's healthy growth. The deep soil-fixing and drought-resistant capabilities, along with the evenly developed lateral taproot system forming a wide absorption network and providing strong lateral grip, significantly enhance the seedlings' wind and lodging resistance, laying a solid foundation for subsequent high and stable yields. It greatly improves the seedlings' stress resistance and survival rate. The core guiding frame is made of biodegradable materials. During transplanting, there is no need to remove the seedlings from the device; the entire root ball can be planted directly. The frame material degrades naturally in the soil, turning into fertilizer, completely avoiding any physical damage to the root system during the seedling removal process and shortening the seedling recovery period.

[0028] 2. In this invention, the movable nozzle and the second spray hole on the guide shaft can directly and accurately deliver nutrient solution and air to the root growth front. This targeted supply not only improves water and fertilizer utilization but, more importantly, greatly improves the looseness and oxygen content of the rhizosphere, effectively preventing root rot, stimulating root hair growth, and creating an optimal environment for root respiration and absorption. The entire root guidance process is automatically carried out based on sensor signals, requiring no frequent manual intervention. This reduces management difficulty and technical barriers, saves manpower, and provides reliable technical equipment for achieving large-scale, standardized, and high-quality seedling production. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the cultivation device structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the first and second nutrient devices of the present invention;

[0031] Figure 3 This is a schematic diagram of the supply pipe structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the nozzle structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the lifting frame one and lifting frame two of the present invention;

[0034] Figure 6 This is a cross-sectional view of the second nutrient device of the present invention;

[0035] Figure 7 This is a schematic diagram of the feeding groove structure of the present invention;

[0036] In the diagram: 1. Cultivation box; 2. Seedling pot; 3. Cylindrical frame; 4. Branch pipe frame; 5. First nutrient device; 6. Second nutrient device; 41. Through hole; 42. Loose substrate; 51. Supply pipe; 52. Liquid supply tank one; 53. Air supply tank one; 54. Frame one; 55. Lifting frame one; 511. Nozzle; 512. Column cavity one; 513. Column cavity two; 514. Spray pipe; 515. Spray hole one; 516. Spring; 517. First pressure sensor; 61. Lifting frame two; 6 2. Disc base; 63. Column base; 64. Sleeve; 65. Separating blade; 66. Drive wheel one; 67. Guide cylinder; 68. Feed inlet; 69. Top cover; 610. Guide shaft; 611. Guide screw; 612. Drive wheel two; 613. Column cavity; 614. Spray hole two; 615. Rotary tube; 616. Inlet one; 617. Inlet two; 618. Liquid supply tank two; 619. Air supply tank two; 620. Second pressure sensor; 621. Stirring rod; 622. Feeding groove. Detailed Implementation

[0037] Reference Figures 1-7 The present invention provides a technical solution: a plant seedling cultivation device, comprising:

[0038] Cultivation box 1, with seedling pots 2 at the top;

[0039] A cylindrical frame 3 is located in the center of the seedling pot 2, and a second nutrient device 6 is connected inside the frame to guide the growth of the roots inside the frame.

[0040] Branch frame 4 is located inside the seedling pot 2 and multiple branches are distributed around the outer circumference of the cylindrical frame 3. Multiple through holes 41 are distributed on its pipe wall, and a first nutrient device 5 is connected to its pipe cavity to guide the root growth of its pipe cavity.

[0041] In this embodiment, the cylindrical frame 3 is placed vertically in the center of the seedling pot 2. The seedling seeds are buried in the cylindrical frame 3. The upper end of the branch frame 4 is close to and points towards the height area where the seedling seeds are located, and the lower end of the branch frame 4 points towards the bottom of the seedling pot 2. The shape of the branch frame 4 can be specifically designed according to the desired shape of the seedling seeds spreading outward. In this structure, the branch frame 4 includes an upper arc-shaped tube section and a lower straight tube section. The cylindrical frame 3 adopts a vertical structure. Therefore, the cylindrical frame 3 guides the root system of the seedling seeds vertically to grow and spread, forming a vertical growth pattern. The seedlings are guided to grow and spread laterally through the branch frame 4, forming a lateral main root system and a lateral main root system. When the seedlings develop into seedlings, their root system can form the above structure, so that the seedling roots can spread outward evenly in the soil and continue to grow. The initial vertical main root system and the evenly distributed lateral main root system further enhance the connection between the seedling and the soil, and greatly improve the seedling's wind resistance.

[0042] The cylindrical frame 3 and the branch frame 4 are made of biodegradable materials, such as starch-based plastics, cellulose, and wool felt.

[0043] In this embodiment, the cavity of the branch frame 4 is filled with a loose substrate 42. The looseness of the loose substrate 42 in the branch frame 4 is higher than that of the cultivation soil in the seedling pot 2, so that the seedling roots grow and spread before the loose substrate 42, which facilitates the preferential generation of lateral main roots.

[0044] In this embodiment, the first nutrition device 5 includes:

[0045] A lifting frame 55 is set in the cultivation box 1, and a frame 54 is installed on it;

[0046] The supply pipe 51 has a nozzle 511 at one end, which extends into the branch pipe frame 4, and the other end is connected to the liquid supply tank 52 and the air supply tank 53 respectively.

[0047] Both the nutrient solution supply tank 52 and the air supply tank 53 are mounted on the frame 54. The movement of the frame 54 is controlled by the lifting frame 55, which in turn controls the movement of the nutrient solution supply tank 52 and the air supply tank 53, thus moving the supply pipe 51. The supply pipe 51 is placed in the loose substrate 42. The nutrient solution supply tank 52 provides timely nutrient solution to the seedling roots, while the air supply tank 53 provides timely air to the seedling root area, improving the aeration, looseness, and oxygen content of this area, thus guiding the seedlings... The roots grow along the end region of the supply pipe 51. The concentration of nutrient solution and air content decreases sequentially from the supply end region of the supply pipe 51 to the outer end region. Therefore, the roots preferentially grow into the cavity of the branch pipe frame 4, and then spread outward through the through hole 41. The supply pipe 51 is then guided outward by the timely adjustment of the lifting frame 55. This gradually guides the lateral main roots of the seedling and the roots that spread outward from the lateral main roots, so that the seedling roots spread and grow evenly and firmly.

[0048] In this embodiment, the nozzle 511 includes:

[0049] The column cavity 512 is located at the tail of the nozzle 511;

[0050] Column cavity 2 513 is opened at the head of nozzle 511 and is connected to column cavity 1 512;

[0051] The nozzle 514 has its tail end sliding in the second column cavity 513 and is connected to the tail end of the second column cavity 513 by a spring 516. Its head slides in the first column cavity 512 and its head side wall is provided with a spray hole 515.

[0052] In other words, when the nutrient solution or air supplied by the supply pipe 51 acts on the nozzle 511, it first pushes the nozzle 514 out of the column cavity 2 513, so that the nozzle 1 515 is exposed in the loose substrate 42, completing the export of nutrient solution or air. When the supply pipe 51 stops supplying, it can retract into the column cavity 2 513 under the action of the spring 516, so as to avoid the nozzle 1 515 from being blocked and to prevent the seedling roots from growing into the nozzle 1 515.

[0053] Among them, the nozzle 515 is inclined outward to improve diffusion uniformity and diffusion efficiency.

[0054] In this embodiment, the nozzle 514 is provided with a first pressure sensor 517 on its end face to monitor the pressure on its surface. That is, by monitoring the pressure data of the first pressure sensor 517, the growth of the lateral main root system in the loose substrate 42 of the branch frame 4 in the area where the nozzle 514 is located is determined. The greater the pressure, the more lush and thick the root system in this area. When the pressure data reaches a certain range, it indicates that the lateral main root system in the area where the nozzle 514 is located is growing, spreading and spreading relatively lushly. Then, the feedback lifting frame 55 adjusts the supply pipe 51 to extend outward a certain distance, waiting for the lateral main root system to extend and spread along the cavity of the branch frame 4 again. By analogy, a lush and uniform lateral main root system morphology can be obtained.

[0055] In this embodiment, when the spring 516 is reset, the nozzle 515 can be located in the cylindrical cavity 513.

[0056] In this embodiment, the second nutrition device 6 includes:

[0057] Lifting frame 2 61 is set in cultivation box 1, on which a tray base 62 is installed, and a column base 63 is installed on the tray base 62;

[0058] Sleeve 64 is rotatably sleeved on the upper end of column base 63 and connected to drive wheel 66 mounted on column base 63. Separation blade 65 is provided at the upper end of sleeve 64 and the interior is filled with loose soil.

[0059] The feed tube 67 is fixed in the middle of the column base 63. Its upper end is fitted with a top cover 69 that seals the upper opening of the sleeve 64. Its lower outer wall is provided with a feed inlet 68 that connects to the cavity of the sleeve 64. Its inner wall is provided with stirring rods 621.

[0060] The guide shaft 610 rotates inside the guide cylinder 67. Its outer wall is fitted with a guide screw 611 and connected to a drive wheel 612 mounted on the column base 63.

[0061] In other words, by adjusting the movement of the plate base 62 through the lifting frame 2 61, the overall structure movement on the column base 63 is controlled. Specifically, initially, the top cover 69 is placed at a certain height in the cylindrical frame 3, and soil is filled in the cylindrical frame 3 above the top cover 69, with seedlings placed in the soil. Therefore, as the vertical taproot system in the cylindrical frame 3 grows, the top cover 69 is moved downwards by adjusting the sleeve 64 through the lifting frame 2 61. It should be noted that the structure of the soil used for cultivating seedlings in this structure is such that the soil above the top cover 69 does not collapse after it moves downwards. Therefore, when the vertical taproot system in the cylindrical frame 3 grows downwards to a certain extent... First, drive wheel 66 is used to control the rotation of sleeve 64, which drives the separation blade 65 to rotate and separate the adhesion between the upper surface of top cover 69 and the soil in contact with the upper surface of top cover 69. After completion, lift frame 61 is used to control the sleeve 64 to descend a certain distance. During the descent of top cover 69, drive wheel 612 is started to control the rotation of guide shaft 610, which drives guide screw 611 to transfer the loose soil in sleeve 64 to the upper surface of top cover 69, filling the space where top cover 69 descends. After completion, the structure of the new loose soil can further enhance the growth and diffusion sustainability of the vertical main root system in the cylindrical frame 3 and the guiding strength of the vertical growth trend.

[0062] When the sleeve 64 rotates, the stirring rod 621 installed on its inner wall can play a certain stirring effect on the soil inside, which is conducive to improving the soil loosening effect.

[0063] In this embodiment, the guide shaft 610 is provided with a column cavity 613, and the outer wall of the guide shaft 610 is provided with spray holes 614 connected to the column cavity 613. The lower end of the column cavity 613 is rotatably connected to a rotating pipe 615, and the rotating pipe 615 is connected to a liquid supply tank 618 through an inlet 616 and to an air supply tank 619 through an inlet 617.

[0064] Specifically, the seedling root nutrient solution is supplied in a timely manner through the liquid supply box 52, and the air supply box 619 is supplied in a timely manner to the seedling root area, thereby improving the air permeability, looseness and oxygen content of this area, guiding the seedling roots to grow and spread along the depth of the cylindrical frame 3. At the same time, it is beneficial to improve the looseness and nutrient content of the soil in the sleeve 64, and can better guide the growth and spread of the vertical main root system.

[0065] In this embodiment, a second pressure sensor 620 is provided on the upper surface of the top cover 69 to monitor the pressure on its surface. That is, by monitoring the pressure data of the second pressure sensor 620, the growth of the vertical main root system in the direction of the cylindrical frame 3 and the deep area is determined. The greater the pressure, the more lush and thick the root system in this area. When the pressure data reaches a certain range, it indicates that the lateral main root system in the area where the top cover 69 is located is growing, spreading and spreading more lushly. Then, the feedback lifting frame 2 61 adjusts the plate seat 62 to move outward a certain distance, waiting for the vertical main root system to extend and spread again along the direction of the cylindrical frame 3 and the deep area. By analogy, a lush, uniform and strong vertical main root system morphology can be obtained.

[0066] In this embodiment, the outer surface of the separating blade 65 is provided with a material feeding groove 622 so that the soil discharged by the guide screw 611 can be better distributed and diffused to the surface of the top cover 69.

[0067] In its specific implementation, it includes the following steps:

[0068] Step 1: Install the cylindrical frame 3 and the branch frame 4, which are made of biodegradable materials, into the seedling pot 2;

[0069] Step 2: Fill the seedling pot 2 with cultivation soil, and sow the seedling seeds in the upper part of the cylindrical frame 3. The branch frame 4 is evenly distributed around the cylindrical frame 3, and the loose substrate 42 filled in its cavity provides a priority channel for the lateral growth of the roots.

[0070] Step 3: After the seed germinates, the taproot grows downward and enters the area above the top cover 69 of the second nutrient device 6, where the vertical taproot system is guided. At the same time, driven by hydrotropism and aerotropism, the roots are attracted by the looser and more oxygen-rich substrate in the cavity of the branch frame 4, enter the interior of the branch frame 4 through the through hole, begin to grow laterally, and spread through the through hole 41, where the lateral taproot system is guided.

[0071] Among them, the first nutrient device 5 regulates lateral root management:

[0072] A1. The liquid supply tank 52 and the air supply tank 53 deliver nutrient solution and air precisely into the loose substrate of the branch frame 4 through the supply pipe 51 and the nozzle 511.

[0073] B1. The first pressure sensor 517 monitors the pressure on the end face of the nozzle 511 in real time. This pressure value directly reflects the growth density and robustness of the root system at the current location.

[0074] C1. When the pressure value reaches the preset threshold, it indicates that the root system in the area has grown sufficiently. The system controls the lifting frame 55 to move the supply pipe 51 outward slowly a short distance, creating a new nutrient-rich and oxygen-rich growth point in front, continuing to attract and induce the lateral main root system to extend forward and outward. This cycle is repeated to gradually guide the lateral main root system to grow and spread evenly and vigorously along the direction of the branch pipe frame.

[0075] Among them, the second nutrient device 6 regulates vertical root management:

[0076] A2. The liquid supply box 2 618 and the air supply box 2 619 deliver nutrients and air to the loose soil that is about to be transported to the top cover 69 through the spray hole 2 614 on the guide shaft 610, thereby optimizing the growth environment of the vertical taproot.

[0077] B2. The second pressure sensor 620 monitors the pressure on the top cover surface in real time to determine the growth strength of the vertical main root and whether it has reached the required depth;

[0078] C2. When the pressure value reaches the preset threshold, indicating that the main root has grown healthily to the current depth, the system starts:

[0079] i. Drive wheel 66 drives sleeve 64 and separating blade 65 to rotate, cutting off the adhesion between top cover 69 and the soil above;

[0080] ii. The lifting frame 61 drives the sleeve 64 and the top cover 69 to move down a certain distance in sync, making room for the roots to continue to grow downward. At the same time, the driving wheel 612 drives the guide screw to rotate, conveying the loose soil pre-stored in the sleeve 64 through the feed port 68 and the guide cylinder 67 and spreading it evenly on the upper surface of the top cover 69, filling the cavity created by the downward movement, and continuing to support the downward growth of the main root.

[0081] This process is repeated cyclically, continuously guiding the taproot to develop deeper into the soil;

[0082] Step 4: Through the above continuous monitoring, feedback, and movement induction mechanism, the seedling root system is precisely shaped. Under the continuous guidance of the second nutrient device, it grows deep downward to form a strong vertical taproot system. Under the traction of the first nutrient device, it expands horizontally outward along multiple branch frames to form a uniformly radiating lateral taproot system, and finally forms a root ball with a stable structure and a large absorption area.

[0083] Step 5: Once the seedlings have grown, the entire root system has been solidified in the soil. Since the cylindrical frame and branch frame are made of biodegradable materials, the seedlings can be directly removed along with the soil in the seedling pot for transplanting. After transplanting, the frame material will naturally degrade in the soil and will not restrict the subsequent growth of the roots, thus achieving zero-damage transplanting and greatly improving the survival rate.

[0084] The above description is merely a preferred embodiment of the invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A plant seedling cultivation device, characterized in that, include: A cultivation box (1) with a seedling pot (2) at the top; A cylindrical frame (3) is placed in the center of the seedling pot (2), and a second nutrient device (6) is connected inside the frame to guide the growth of the roots inside the frame. Branch frame (4) is located inside the seedling pot (2) and multiple branches are distributed around the outer circumference of the cylindrical frame (3). Multiple through holes (41) are distributed on its pipe wall, and a first nutrient device (5) is connected to its pipe cavity to guide the root growth of its pipe cavity.

2. The plant seedling cultivation device according to claim 1, characterized in that, The cavity of the branch frame (4) is filled with a loose matrix (42).

3. The plant seedling cultivation device according to claim 1, characterized in that, The first nutrient device (5) includes: A lifting frame (55) is set in the cultivation box (1), and a frame (54) is installed on it. The supply pipe (51) has a nozzle (511) at one end, which extends into the branch pipe frame (4), and the other end is connected to the liquid supply tank (52) and the air supply tank (53).

4. The plant seedling cultivation device according to claim 3, characterized in that, The nozzle (511) includes: The first column cavity (512) is located at the tail of the nozzle (511); Cavity 2 (513) is located at the head of nozzle (511) and is connected to cavity 1 (512); The nozzle (514) slides in the second column cavity (513) and is connected to the tail end of the second column cavity (513) by a spring (516). Its head slides in the first column cavity (512) and its head side wall is provided with a nozzle hole (515).

5. A plant seedling cultivation device according to claim 4, characterized in that, The nozzle (514) is provided with a first pressure sensor (517) on its head end face.

6. A plant seedling cultivation device according to claim 4, characterized in that, When the spring (516) is reset, the first nozzle (515) can be located in the second column cavity (513).

7. A plant seedling cultivation device according to claim 1, characterized in that, The second nutrient device (6) includes: The second lifting frame (61) is set in the cultivation box (1), and a tray base (62) is installed on it. A column base (63) is installed on the tray base (62). The sleeve (64) is rotated and fitted onto the upper end of the column base (63), and is connected to a drive wheel (66) mounted on the column base (63). The upper end of the sleeve is provided with a separating blade (65), and the inside of the sleeve is filled with loose soil. The feed tube (67) is fixed in the middle of the column base (63). Its upper end is fitted with a top cover (69) that seals the upper opening of the sleeve (64). Its lower outer wall is provided with a feed inlet (68) that connects to the cavity of the sleeve (64). Its inner wall is provided with stirring rods (621). The guide shaft (610) rotates inside the guide cylinder (67), and its outer wall is fitted with a guide screw (611) and connected to a drive wheel (612) mounted on the column base (63).

8. A plant seedling cultivation device according to claim 7, characterized in that, The guide shaft (610) is provided with a column cavity (613). The outer wall of the guide shaft (610) is provided with two spray holes (614) connected to the column cavity (613). The lower end of the column cavity (613) is rotatably connected to a rotating pipe (615). The rotating pipe (615) is connected to a liquid supply tank (618) through an inlet (616) and to an air supply tank (619) through an inlet (617).

9. A plant seedling cultivation device according to claim 7, characterized in that, The top cover (69) is provided with a second pressure sensor (620) on its upper surface.

10. A plant seedling cultivation device according to claim 7, characterized in that, The outer surface of the separating blade (65) is provided with material feeding grooves (622).

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