Universal machine-transplanted rice seedling tray seed precision drilling method

Abstract

The invention relates to the technical field of sowing, in particular to a method for precisely sowing rice seeds in drill in a universal machine-transplanted rice seedling tray, and solves the problems of high planting seed consumption, difficulty in efficiently and uniformly sowing in drill and difficulty in cultivating strong seedlings in an existing seedling raising production line. The method comprises the steps of seed soaking and germination accelerating, matrix filling, row distributor strip sowing, water spraying, soil covering, seedling raising and the like. By controlling the germination accelerating condition of seeds to be sown and matching with the independently researched and developed seed row distributor, the seeds are continuously arranged in rows in the seedling tray, 16-18 rows of seeds are sown in each seedling tray, that is, the seeds are uniformly distributed, and the seed consumption of each seedling tray is about 60g, so that on the premise of reducing the seed consumption, the seedling claws of the rice transplanter can clamp seedlings every time, and the seeding efficiency is improved. Meanwhile, strong seedlings can be cultivated, rice seedlings can be transplanted in time when the seedlings grow to have 3-4 leaves, the rice seedling transplanting uniformity can be improved, the mechanical transplanting quality can be improved, and the rice yield can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of sowing devices, and in particular relates to a universal machine-transplanted rice seedling tray seed precision drill sowing method. Background Art

[0002] Mechanized rice seedling raising is an important measure to improve agricultural production efficiency and achieve high seedling yield. Mechanized rice seedling raising includes the following processes: scraping the substrate tray, sowing, watering, covering with soil, then transferring to the germination room for germination, and then transferring to the seedling hardening field (or greenhouse) for seedling raising. The whole process is mature in technology, complete in equipment, and easy to operate. However, most of the current mechanized rice seedling raising adopts the broadcasting method, and the seeds are distributed disorderly in the seedling tray. Some positions have high seed density and some have low seed density. When the subsequent rice transplanter's seedling claw grabs the seedling, it is easy to miss the seedling. In order to ensure that the rice transplanter's seedling claw can clamp the seedling every time, the number of seedlings grabbed by the seedling claw each time must be more than 6 to ensure that there is no missing. Therefore, it is necessary to ensure that there are enough seeds in the seedling tray. The sowing amount of each tray is about 100-150 grams, which is equivalent to at least 2.0 kg of seeds per mu. This is obviously not conducive to the mechanized planting of hybrid rice with expensive seeds (60-100 yuan / kg). At the same time, the seed density in the seedling tray is too high, the competition for individual development of rice seedlings intensifies, and it is difficult to cultivate strong seedlings, especially when transplanting is delayed to old seedlings with more than 5 leaves. The quality of the seedlings is poor, which reduces the quality of transplanting, prolongs the greening period, and affects the final rice yield.

[0003] In recent years, some people have proposed to use strip sowing to raise rice seedlings. However, the existing seedling tray strip sowing machinery is not very versatile, the machine cost is high, it does not match the original seedling production line, it is easy to get blocked, etc., and it is difficult to apply in production. In order to improve the production efficiency of mechanized rice seedling raising, it is necessary to control the amount of seeds used, improve the efficiency and continuity of mechanized seedling raising, and cultivate healthy seedlings. Summary of the invention

[0004] The purpose of the present invention is to provide a method for precision seeding of rice seedling production lines, so as to solve the problems that the existing seeding production lines require a large amount of seeds for planting, and are difficult to efficiently and evenly seed and cultivate strong seedlings.

[0005] The specific technical solutions are as follows: A method for precision seeding in a rice seedling production line, comprising: S1: Soak rice seeds until they are white and the sprouts are no longer than 2mm. Dry them and do not stick to the hands. S2: Install the seed row distributor above the sowing line; S3: Fill the seedling culture medium into the hopper of the medium tray loading machine, and the medium should be soft and fine without large particles; S4: Loading the seeds processed in step S1 into a seeder, aligning the seed outlet of the seeder with the seed row distributor, so that the seeds do not overflow; S5: Put the seedling tray into the seedling tray slot on the sowing assembly line; S6: Start the substrate tray loading machine and the seedling tray conveyor in sequence, adjust the seeding amount of the seeder and the travel speed of the seedling tray, so that the seeds are arranged in rows in the seedling tray, and each seedling tray is sown with 16-18 rows; After the seeds are sown into the grooves of the seedling tray, they are covered with a thin layer of topsoil and watered to keep them moist. Then the seedling trays are stacked and placed in a dark room for germination, and then moved to a seedling hardening field or a seedling greenhouse for seedling cultivation. S7: When the seedlings grow to 3-4 leaves, transplant them in time.

[0006] Preferably, the seed row distributor comprises: A support frame, which is erected above the sowing assembly line and is used to support various components of the seed row distributor; A row-opening harrow, which is arranged at the front of the lower part of the support frame and is used to draw grooves in the substrate in the seedling tray; A vibration plate, which is arranged on the upper part of the support frame and behind the row-opening harrow, and is equipped with a vibration motor for evenly dispersing and discharging the seeds discharged from the seeding machine into the vibration plate; A linear row pipe is arranged in the middle of the support frame and between the vibration plate and the row-opening harrow. The bottom of the linear row pipe is inserted into the groove. The linear row pipe is used to further widen the groove and guide the rice seeds discharged from the vibration plate into the groove opened by the row-opening harrow. At the same time, the matrix part on both sides of the groove flows back to cover the sown seeds.

[0007] Preferably, the row-opening rake includes a connecting plate and rake teeth, the rake teeth are fixed at intervals on the connecting cross bar, both ends of the connecting plate are rotatably connected to one leaf of the hinge, and the other leaf of the hinge is fixed to the support frame, that is, the connecting plate can swing relative to the support frame.

[0008] Preferably, the diameter of the rake teeth is 3-5 mm, and the number of the rake teeth is 16-18.

[0009] Preferably, it also includes a pallet and a support plate, the vibration plate is fixed on the pallet, the lower sides of the pallet are connected to the support plate through shock-absorbing springs, the two ends of the support plate are detachably fixed to the support frame, the support plate is arranged in an inclined shape with a rear end higher than a front end, and the vibration plate is also arranged in an inclined shape with a rear end higher than a front end; the vibration motor is installed on the back of the pallet, and the vibration motor drives the pallet and the vibration plate to vibrate.

[0010] Preferably, side plates are respectively provided on both sides of the vibration disk, a baffle is also provided at the front end of the vibration disk, and a through hole for seeds to flow is provided between the lower end of the baffle and the vibration disk.

[0011] Preferably, the linear tube arrangement includes a plurality of semi-open circular tubes and a transverse plate, wherein the plurality of semi-open circular tubes are tightly arranged and fixed on the transverse plate, the semi-open circular tubes are larger at the top and smaller at the bottom, and the bottom is inserted into the substrate of the seedling tray; the two ends of the transverse plate are connected to the support frame through hinges, and the transverse plate is inclined from top to bottom toward the inner side of the vibration tray.

[0012] Preferably, in step S6, the amount of seeds planted in each seedling tray is 60-100 grams. Preferably, the amount of seeds planted in each seedling tray is 60-80 grams.

[0013] Preferably, in step S6, the germination temperature is 35°C and the germination time is 12 hours.

[0014] Preferably, the matrix is ​​pure soil that has been crushed and sieved, or a matrix specifically for raising rice seedlings purchased or mixed from the market.

[0015] Compared with the existing technology, the present invention has the following beneficial effects: 1. Traditional seedling production lines all use broadcasting to sow seeds, and the seeds are distributed in disorder in the seedling tray. In order to reduce missed planting, it is necessary to increase the sowing amount to more than 100 grams per tray. The amount of seeds used is large, and the growth space of the seedlings is limited, which is not conducive to the cultivation of strong seedlings, and hinders the large-scale promotion of mechanized hybrid rice seedling raising and transplanting technology. The present invention adopts a self-developed seed row distributor to arrange the seeds in rows in the seedling tray continuously. Each seedling tray sows 16-18 rows, and the seeds are evenly distributed. The seed amount of each seedling tray is 60 grams to 80 grams. Under the premise of reducing the amount of seeds used, it can ensure that the seedling claws of the transplanter can clamp the seedlings every time, reducing the missed planting rate and the seedling injury rate of the machine transplanting; at the same time, it can cultivate strong seedlings, improve the uniformity of transplanting, and increase rice yield.

[0016] 2. In recent years, some people have developed special seed drills for machine-transplanted rice, but they have three major defects: first, the groove pressing roller used is difficult to press out grooves in the dry and dense matrix, and a special seedling raising matrix needs to be used; second, the sowing system is mainly suitable for short-grain seeds. If long-grain seeds are encountered, the sowing device needs to be replaced; third, the entire seedling raising production line is dedicated, which is completely different from the existing seedling raising production line. The system is expensive and difficult to promote. The present invention is suitable for all seedling raising matrices by arranging row rakes and linear row pipes to open grooves on the seedling raising matrix of the seedling tray; at the same time, the original seeding machine can continue to be used to sow seeds of various sizes and shapes; more advantageously, all the components included in the present invention are movably connected by connecting parts, which can be flexibly and conveniently adapted to almost all traditional seedling raising production lines, and is a universal technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the opening rake of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the vibration plate of the present invention.

[0021] Figure 4 It is a schematic diagram of the structure of the linear tube arrangement of the present invention.

[0022] Figure 5 These are photos of different sowing modes of the present invention.

[0023] Among them, the main reference numerals are described as follows: 1. Opening rake; 11. Connecting plate; 12. Rake teeth; 2. Support frame; 3. Vibrating plate; 31. Side plate; 32. Baffle; 4. Linear pipe arrangement; 41. Semi-open round pipe; 42. Horizontal plate; 5. Vibrating motor; 6. Pallet; 7. Support plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "top", "bottom", "top surface", "bottom surface", "inside", "outside", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] In the description of the present invention, the meaning of "several" is one or more, the meaning of "more" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there are terms "first", "second" and "third" in the description, they are only used for the purpose of description and distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is a description of an embodiment of the present invention based on its overall structure.

[0028] Example 1 like Figure 1 As shown, a seed row distributor comprises: A support frame 2, which is set up behind the soil spreading device of the seeding line and is used to support various components of the seed row distributor; A row-opening harrow 1, which is arranged in the front middle of the support frame 2 and is used to draw grooves in the substrate in the seedling tray; A vibration plate 3, which is arranged in the middle of the support frame 2 and behind the row-opening harrow 1. The vibration plate 3 is equipped with a vibration motor 5, which is used to evenly disperse and discharge the seeds discharged from the seeding machine into the vibration plate 3; The linear row pipe 4 is arranged in the middle of the support frame 2 and between the vibration plate 3 and the row-opening harrow 1. The linear row pipe 4 is larger at the top and smaller at the bottom, and the bottom is inserted into the matrix groove. The linear row pipe 4 is used to further widen the groove and guide the rice seeds discharged from the vibration plate 3 into the groove opened by the row-opening harrow 1 in strips. At the same time, the matrix part on both sides of the groove flows back to cover the sown seeds.

[0029] The seed row distributor of the present application is provided with a row-opening rake 1 to open furrows on the seedling raising substrate of the seedling tray, and at the same time, a matching vibration plate 3 and a linear row pipe 4 are provided, which is conducive to uniformly sowing rice seeds into the furrows of the seedling raising substrate in strips, and realizing precise row sowing of the seedling tray. The problem that the existing seedling raising production line requires a large amount of seeds for planting, and it is difficult to efficiently and uniformly sow in strips and cultivate strong seedlings is solved.

[0030] Combination Figure 2The row opening rake 1 includes a connecting plate 11 and rake teeth 12. The connecting plate 11 can be made of a steel plate, and the rake teeth 12 are made of steel nails. The rake teeth 12 are welded on the connecting plate 11 at uniform intervals. The two ends of the connecting plate 11 are rotatably connected with one leaf of the hinge, and the other leaf of the hinge is fixed to the support frame 2, that is, the connecting plate 11 can swing relative to the support frame 2, which can ensure that when the rake teeth 12 touch the edges of the raised parts of the two ends of the seedling tray during the forward advancement of the seedling tray, the rake teeth 12 automatically flip upwards and smoothly pass through the seedling tray, and then automatically return to their original positions under the action of their own gravity, which is conducive to improving the continuity and flexibility of the row opening. A limit block can also be set on the hinge to further limit the rotation amplitude of the connecting plate 11. The connecting plate 11 can also be pulled by a spring or rubber band to accelerate the return of the row opening rake 1.

[0031] Combination Figure 3 , the vibration plate 3 is fixed on the support plate 6, the lower sides of the support plate 6 are connected to the support plate 7 through shock-absorbing springs, the two ends of the support plate 7 are detachably fixed to the support frame 2, and the support plate 7 is arranged in an inclined shape with a high rear end and a low front end, and the vibration plate 3 is also arranged in an inclined shape with a high rear end and a low front end; the vibration motor 5 is installed on the back of the support plate 6, and the vibration motor 5 drives the support plate 6 and the vibration plate 3 to vibrate. The arrangement of the vibration motor 5 and the inclined vibration plate 3 is conducive to the uniform dispersion and discharge of the seeds, and it is not easy to be crowded. Specifically, the two ends of the support plate 7 are respectively fixed on the hinge, and the other leaf of the hinge is detachably connected to the support frame 2 by bolts, and the inclination of the support plate 7 can be adjusted to adjust the inclination of the vibration plate 3. By adjusting the inclination, the discharge speed of the rice seeds can be adjusted, and then the impact of the rice seeds on the linear row pipe 4 and the speed of falling into the matrix can be adjusted, so as to ensure that the seeds will not be crowded in the linear row pipe 4, nor will they flip in the matrix groove. Preferably, side plates 31 are provided on both sides of the vibration plate 3 to prevent the seeds flowing down from the seeder from leaking to the sides. A baffle 32 is also provided at the lower end of the support plate 6, and a passage for the flow of seeds is provided between the lower part of the baffle 32 and the support plate 6. The baffle 32 can prevent the seeds from falling directly into the linear tube 4 or bouncing off without being spread evenly by the vibration of the vibration plate.

[0032] Combination Figure 4, the linear pipe arrangement 4 includes a plurality of semi-open circular tubes 41 and a transverse plate 42, wherein the plurality of semi-open circular tubes 41 are arranged on the transverse plate 42 by welding or bonding, and the two ends of the transverse plate 42 are fixed to the frame by hinges and tilted toward the rear side of the vibration plate 3. The design of the plurality of semi-open circular tubes 41 makes it difficult for seeds to be blocked. Preferably, the opening of the semi-open circular tube 41 gradually changes from large to small from top to bottom, and this shape structure changes the distribution of seeds from diffuse distribution at the wide mouth to linear distribution at the narrow mouth; the lower opening of each semi-open circular tube 41 corresponds to the groove position in the seedling tray, and the lower opening width of the semi-open circular tube 41 is slightly larger than the diameter of the rake teeth 12; the semi-open circular tube 41 has both grooving and sowing functions, and the seeds fall into the matrix groove in a linear arrangement, and then the matrix parts on both sides of the groove flow back to cover the sown seeds. The semi-open circular tube 41 is made of stainless steel, which has a certain weight and can be inserted into substrates of different hardness to accurately sow rice seeds into the substrate. Long-term use will not increase the friction between the seeds and the tube wall due to rust, thereby causing seeds to be blocked in the linear row tube 4.

[0033] Here’s how to use it: When in use, the seed row distributor of this embodiment is installed at the position behind the soil spreading device of the sowing line. The sowing line is an existing line, including a transmission wheel driven by a seedling tray conveyor, and the transmission wheel is provided with a seedling tray groove. The line is provided with a soil spreading device, a sowing device, a soil covering device and a watering device in sequence along the forward direction. The soil spreading device and the seedling tray conveyor are started, and the seeding amount of the sowing device and the walking speed of the seedling tray are adjusted to adjust the sowing density. After the seedling tray is loaded with the matrix, it moves along the line, and the row opening harrow 1 opens a groove on the seedling substrate, and the rice seeds discharged by the sowing machine fall into the vibration plate 3. The vibration motor 5 drives the vibration plate 3 to vibrate, so that the rice seeds are evenly scattered and fall into the linear row pipe 4, and the linear row pipe 4 further widens the groove and guides the rice seeds discharged by the vibration plate 3 into the groove opened by the row opening harrow 1. At the same time, the matrix part on both sides of the groove flows back to cover the sown seeds. Then, the soil covering device and the watering device are used to further cover the soil and sprinkle water.

[0034] Example 2 The seed row distributor of Example 1 was used to sow rice. The rice variety sown was Guiyefeng, and the thousand-grain weight of the seeds was 22 grams. The seedling raising medium was pure soil in the Guangxi Academy of Agricultural Sciences. The row sowing and seedling raising were carried out according to the following method: (1) Soak the rice seeds until they are white and the sprouts are no longer than 2mm. Dry them and make sure they are not sticky when held by hand. (2) Install the seed row distributor of Example 1 on the existing rice sowing line, and perform mechanized sowing according to the method of use of Example 1. Figure 5As shown in the right picture, 60 grams of seeds are sown in each tray, with a total of 18 rows, and the seeds are arranged in continuous rows in the seedling tray.

[0035] (3) Cover the seedling trays with a thin layer of soil after sowing and water them to keep them moist.

[0036] Stack the seedling trays and put them in a dark room for germination. The germination temperature is 35 degrees and the time is 12 hours.

[0037] (4) Move the germinated seedling trays to the seedling hardening field or seedling greenhouse for seedling cultivation.

[0038] (5) When the seedlings grow to 3-4 leaves, transplant them in time.

[0039] Comparative Example 1 The rice variety sown is Guiyefeng, and the thousand-grain weight of the seeds is 22 grams. The rice seeds are sown on the seedling tray by broadcasting, with 60 grams of seeds sown in each tray. The shape after sowing is as follows Figure 5 As shown in the middle figure, this sowing pattern will have uneven density in some locations with high density and low density in other locations. When the seedling claws of the subsequent transplanter grab the seedlings, it is easy to miss them.

[0040] Comparative Example 2 The rice variety sown was also Guiyefeng, and the thousand-grain weight of the seeds was 22 grams. The rice seeds were sown on the seedling trays by broadcasting, with 100 grams of seeds sown on each tray. The shape after sowing is as follows Figure 5 As shown in the left figure, this sowing mode has a high sowing density, and the number of seedlings that the seedling claws grab each time must be more than 6, and basically no seedlings will be missed. However, the amount of seeds used is large, and there is a huge waste. At the same time, the seed density in the seedling tray is too high, and the competition for individual development of rice seedlings intensifies, making it difficult to cultivate strong seedlings, especially when transplanting is delayed to old seedlings with more than 5 leaves, the quality of the seedlings is poor, which reduces the quality of transplanting, prolongs the greening period, and affects the final rice yield.

[0041] In comparison, the sowing and raising seedling method of Example 2 can achieve uniform sowing with less seed usage, which can solve the problem of uneven sowing in Comparative Example 1, and the phenomenon that the transplanting claws easily miss the seedlings when grabbing them. It can also solve the problem of large seed usage and difficulty in cultivating strong seedlings in Comparative Example 2.

[0042] In summary, the present invention controls the germination of seeds to be sown and is equipped with a self-developed seed row distributor to arrange the seeds in continuous rows in the seedling tray. Each seedling tray is sown 16-18 rows, and the seeds are evenly distributed. The seed amount of each seedling tray is 60 grams to 80 grams. Under the premise of reducing the seed amount, it can ensure that the seedling claws of the rice transplanter can clamp the seedlings every time, thereby reducing the missed planting rate and the seedling injury rate of the machine transplanting; at the same time, it can cultivate strong seedlings, improve the uniformity of transplanting, and increase rice yield. The foregoing descriptions of specific exemplary embodiments of the present invention are for the purpose of explanation and illustration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can make modifications, substitutions, variations and various selections and changes to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention after reading this specification, but they are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A general type of machine-transplanted rice seedling tray seed precision drill sowing method, characterized in that: The steps include: S1: Soak rice seeds until they are white and the sprouts are no longer than 2mm. Dry them and do not stick to the hands. S2: Install the seed row distributor above the sowing line; S3: Fill the seedling culture medium into the hopper of the medium tray loading machine, and the medium should be soft and fine without large particles; S4: Loading the seeds processed in step S1 into a seeder, aligning the seed outlet of the seeder with the seed row distributor, so that the seeds do not overflow; S5: Put the seedling tray into the seedling tray slot on the sowing assembly line; S6: Start the substrate tray loading machine and the seedling tray conveyor in sequence, adjust the seeding amount of the seeder and the travel speed of the seedling tray, so that the seeds are arranged in rows in the seedling tray, and each seedling tray is sown with 16-18 rows; After the seeds are sown into the grooves of the seedling tray, they are covered with a thin layer of topsoil and watered to keep them moist. Then the seedling trays are stacked and placed in a dark room for germination. Then move to the seedling hardening field or seedling greenhouse for seedling raising; S7: When the seedlings grow to 3-4 leaves, transplant them in time.

2. The method according to claim 1, characterized in that The seed row distributor comprises: A support frame, which is erected above the sowing assembly line and is used to support various components of the seed row distributor; A row-opening harrow, which is arranged at the front of the lower part of the support frame and is used to draw grooves in the substrate in the seedling tray; A vibration plate, which is arranged on the upper part of the support frame and behind the row-opening harrow, and is equipped with a vibration motor for evenly dispersing and discharging the seeds discharged from the seeding machine into the vibration plate; A linear row pipe is arranged in the middle of the support frame and between the vibration plate and the row-opening harrow. The bottom of the linear row pipe is inserted into the groove. The linear row pipe is used to further widen the groove and guide the rice seeds discharged from the vibration plate into the groove opened by the row-opening harrow. At the same time, the matrix part on both sides of the groove flows back to cover the sown seeds.

3. The method according to claim 2, characterized in that The row opening rake comprises a connecting plate and rake teeth, wherein the rake teeth are fixed on the connecting cross bar at intervals, two ends of the connecting plate are rotatably connected with one leaf piece of the hinge, and the other leaf piece of the hinge is fixed with the supporting frame.

4. The method according to claim 3, characterized in that The diameter of the rake teeth is 3-5 mm, and the number of the rake teeth is 16-18.

5. The method according to claim 2, characterized in that: It also includes a pallet and a support plate, the vibration plate is fixed on the pallet, the lower sides of the pallet are connected to the support plate through shock-absorbing springs, the two ends of the support plate are detachably fixed to the support frame, the support plate is arranged in an inclined shape with a rear end higher than a front end, and the vibration plate is also arranged in an inclined shape with a rear end higher than a front end; the vibration motor is installed on the back of the pallet, and the vibration motor drives the pallet and the vibration plate to vibrate.

6. The method according to claim 5, characterized in that Side plates are respectively arranged on both sides of the vibration plate, a baffle is also arranged at the front end of the vibration plate, and a through hole for seeds to flow is arranged between the lower end of the baffle and the vibration plate.

7. The method according to claim 2, characterized in that The linear pipe arrangement includes a plurality of semi-open circular tubes and a transverse plate. The plurality of semi-open circular tubes are tightly arranged and fixed on the transverse plate. The semi-open circular tubes are larger at the top and smaller at the bottom, and the lower part is inserted into the matrix of the seedling tray. Both ends of the transverse plate are connected to the support frame by hinges, and the transverse plate is inclined from top to bottom toward the inner side of the vibration tray.

8. The method according to claim 1, characterized in that In step S6, the amount of seeds planted in each seedling tray is 60-100 grams.

9. The method according to claim 1, characterized in that: In step S6, the germination temperature is 35 degrees and the time is 12 hours.

10. The method according to claim 1, characterized in that The matrix is ​​pure soil that has been crushed and sieved, or is a special matrix for rice seedling cultivation purchased or mixed from the market.

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