Subsoil-free rice seedling raising tray for rice planting

Abstract

The invention belongs to the technical field of sowing container equipment, and particularly relates to a subsoil-free rice seedling raising tray for rice planting, which comprises a matrix soft tray and a seedling raising tray body for storing the matrix soft tray, the seedling raising tray further comprises an overhead oxygen permeation mechanism, the overhead oxygen permeation mechanism is installed between the seedling raising tray body and the matrix soft tray, and the overhead oxygen permeation mechanism reduces the hypoxia probability of seedlings on the matrix soft tray in an overhead mode. According to the seedling raising tray, the overhead oxygen permeation mechanism is arranged, in the daytime when the temperature rises, the hollow plate is controlled by the control piece to periodically rotate forwards and backwards in the seedling raising tray body, and then the matrix soft tray is periodically converted in the water supplementing link and the ventilation link; according to the rice seedling cultivation device, a small amount of water can be conveniently supplemented to rice seedlings for many times, meanwhile, the probability of oxygen deficit of roots of the rice seedlings can be reduced in a water control and ventilation mode, and better assistance is provided for growth of the rice seedlings.

Description

Technical Field

[0001] This invention belongs to the technical field of sowing container equipment, specifically a bottomless rice seedling tray for rice cultivation. Background Technology

[0002] Soilless rice seedling raising is a seedling raising technology that uses a substrate instead of soil. Since soilless seedling raising mostly uses agricultural and forestry waste (such as straw and rice husks) as substrate, it has advantages such as protecting arable land and improving seedling quality, and therefore it is gradually being promoted in the field of rice seedling raising.

[0003] In soilless rice seedling raising, a combination of substrate and seedling trays is often used, employing blanket-like or block-like seedling raising methods to achieve large-scale rice seedling raising. During the seedling raising process, techniques such as nutrient solution spraying and temperature control are employed to precisely regulate the growth environment of rice seedlings, ensuring robust seedlings, well-developed root systems, and the formation of blankets (blocks). This not only effectively improves the emergence rate and promotes well-developed root systems but also facilitates subsequent mechanized seedling lifting and transplanting operations. For example, the pot-blanket hybrid rice seedling raising tray disclosed in related technologies, application number CN2016102503841, features uniformly arranged transverse and longitudinal straight partitions on the bottom of the tray. The transverse and longitudinal straight partitions intersect, forming holes at the intersections. Both the transverse and longitudinal straight partitions are straight, and the top and bottom of the holes formed between the straight partitions are similar in size, ensuring a large space at the bottom of the holes, which is more conducive to the development of hybrid rice roots and increases hybrid rice yield.

[0004] However, the growth requirements of rice seedlings vary depending on the environment during their growth. They have different needs for water, oxygen, and space. For example, rice seedlings have high water requirements during the day due to vigorous photosynthesis and transpiration. Also, new white roots grow rapidly during the day, requiring sufficient space for root development. At night, however, seedlings only respire, with stomata partially closed and transpiration decreasing sharply, necessitating a low-water, high-oxygen environment. In the above scheme, since the seedling tray only drains and ventilates through the bottom drainage holes, the ability to adjust water and oxygen levels according to the actual needs of the rice seedlings is weak, resulting in a weaker promoting effect on rice seedling growth.

[0005] In view of this, the present invention proposes a bottomless rice seedling tray for rice cultivation to solve the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies and solve the above-mentioned technical problems, this invention proposes a bottomless rice seedling tray for rice cultivation.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the water rice seedling raising disc for water rice planting, comprising a substrate soft disc and a seedling raising disc body for storing the substrate soft disc;

[0008] Further comprising an air permeation mechanism, which is installed between the seedling raising disc body and the substrate soft disc, and reduces the probability of seedling hypoxia on the substrate soft disc in an air permeation manner.

[0009] The air permeation mechanism comprises:

[0010] A hollow plate, which is installed in the seedling raising disc body, and the substrate soft discs are uniformly arranged on the hollow plate, a rotating shaft is fixedly installed in the middle of the hollow plate, and the hollow plate is rotatably installed in the seedling raising disc body through the rotating shaft.

[0011] A support seat, which is installed in the seedling raising disc body, is located at both ends of the bottom of the hollow plate, and in the initial state, the support seat supports the hollow plate in cooperation with the rotating shaft, and the support seat is a lifting rod.

[0012] A control member, which is installed on the outside of the seedling raising disc body, is used to control the periodic lifting of the support seat.

[0013] Preferably, the control member comprises a knob, a spring, a control rod and a telescopic cylinder.

[0014] The seedling raising disc body is provided with a rotating groove and a straight-line sliding groove, the knob and the spring are rotatably installed in the rotating groove, and the two ends of the spring are fixedly connected with the knob and the seedling raising disc body, respectively.

[0015] The control rod is slidingly installed in the straight-line sliding groove, the straight-line sliding groove is in communication with the rotating groove, the control rod has a C-shaped structure, the control rod extends into the rotating groove, and during the rotation of the knob, the two ends of the control rod are alternately pushed to move.

[0016] The telescopic cylinders are fixedly installed at both ends of the straight-line sliding groove, the telescopic cylinders are located on the reciprocating sliding path of the control rod, and the telescopic cylinders are in communication with the two support seats through pipelines, respectively.

[0017] Preferably, the seedling raising disc body is provided with a slot, the slot is coaxially distributed with the rotating groove, the knob extends into the slot, an ejection spring is fixedly installed in the slot, and in the initial state, the control rod is located on the rotation path of the knob under the support of the ejection spring.

[0018] Preferably, the output ends of the telescopic cylinders are threadedly installed with flow limiting rods, one end of the flow limiting rod extends into the inside of the output end of the telescopic cylinder, one end of the flow limiting rod extends to the outside of the seedling raising disc body, and an adjusting cap is fixedly installed at one end of the flow limiting rod located on the outside of the seedling raising disc body.

[0019] Preferably, it also comprises a clogging prevention separation mechanism mounted on the hollowed plate, which is used to prevent the rice seedling root system from clogging the hollowed plate pores.

[0020] The clogging prevention separation mechanism comprises a jacking rod, a connecting plate and a supporting spring.

[0021] The jacking rods are fixedly installed on the connecting plate, extend to below the substrate soft disk through the hollowed plate pores, are used to jacking the substrate soft disk, and are elastically connected between the hollowed plate and the connecting plate through the supporting spring.

[0022] Preferably, the jacking rods are all spring telescopic rods, and the ends away from the connecting plate are T-shaped and made of elastic rubber material.

[0023] Preferably, the inside of the seedling tray body is provided with an arc block, the arc block is provided with uniformly distributed protrusions, the protrusions are all made of elastic material, and the protrusions are located on the rotation path of the hollowed plate.

[0024] Preferably, guide plates are fixedly installed on the two sides of the hollowed plate, guide sliding grooves are formed in the guide plates, and pressure rollers are slidably installed in the guide sliding grooves through the guide sliding grooves.

[0025] Preferably, the guide sliding grooves are arranged in a C-shaped structure with the opening facing upward, and the pressure rollers are located in the guide sliding grooves and have an end with a diameter smaller than the height of the guide sliding grooves.

[0026] Preferably, a sliding groove is formed below the guide plate, the connecting plate extends into the sliding groove, and the sliding groove is used to control the connecting plate and the hollowed plate to be parallel.

[0027] The beneficial effects of the present application are as follows:

[0028] 1. The bottom soil-free rice seedling tray for rice planting is provided with an overhead oxygen permeation mechanism, in the daytime with rising temperature, the hollowed plate is controlled to periodically rotate forward and backward in the seedling tray body through the control member, so that the substrate soft disk is periodically changed in the water supplementing and air permeation links, and in combination with the setting of the water permeation holes in the seedling tray body, the rice seedling can be conveniently supplemented with a small amount of water for many times, and the water control and air permeation can reduce the probability of oxygen deficiency of the rice seedling root system, thereby providing better assistance for the growth of the rice seedling.

[0029] 2. The bottomless soil rice seedling raising tray for rice planting according to the present application, through intermittent interception of the connecting plate by the protrusions, the lifting rod can lift the seedling root system or the substrate soft disk multiple times, and the lifting rod made of the spring telescopic rod can utilize multiple elastic impacts to separate the seedling root system from the hollow plate, and the multiple elastic impacts can also reduce the probability of seedling root system fracture compared with direct lifting. BRIEF DESCRIPTION OF DRAWINGS

[0030] The present application will be further described below in conjunction with the drawings.

[0031] Figure 1 is the overall schematic diagram of the present application;

[0032] Figure 2 is the assembly perspective view of the seedling raising tray body and the air-permeable mechanism in the present application;

[0033] Figure 3 is the perspective view of the substrate soft disk;

[0034] Figure 4 is the internal structure diagram of the seedling raising tray body;

[0035] Figure 5 is the sectional view of the seedling raising tray body at the rotating groove and the straight-line sliding groove;

[0036] Figure 6 is the perspective view of the control member;

[0037] Figure 7 is the assembly perspective view of the hollow plate, the guide plate and the lifting rod;

[0038] Figure 8 is the assembly perspective view of the connecting plate and the lifting rod;

[0039] Figure 9 is the perspective view of the arc block;

[0040] In the drawings: 1, substrate soft disk; 2, seedling raising tray body; 21, hollow plate; 22, rotating shaft; 23, support seat; 24, knob; 25, rotating groove; 26, spring; 3, control rod; 31, straight-line sliding groove; 32, telescopic cylinder; 33, insertion slot; 34, ejection spring; 35, flow limiting rod; 36, adjusting cap; 4, lifting rod; 41, connecting plate; 42, support spring; 43, arc block; 44, protrusion; 5, guide plate; 51, guide sliding groove; 52, pressure roller; 53, sliding groove. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0042] For example, Figures 1 to 9As shown, the water rice seedling raising tray for water rice planting comprises a substrate floppy disk 1 and a seedling raising tray body 2 for storing the substrate floppy disk 1.

[0043] Further comprising an air permeation mechanism installed between the seedling raising tray body 2 and the substrate floppy disk 1, which reduces the probability of oxygen deficiency of the seedlings on the substrate floppy disk 1 in an air permeation manner.

[0044] The air permeation mechanism comprises:

[0045] The hollow plate 21 is installed in the seedling raising tray body 2, the substrate floppy disks 1 are uniformly arranged on the hollow plate 21, the hollow plate 21 is fixedly installed with a rotating shaft 22 in the middle, and the hollow plate 21 is rotatably installed in the seedling raising tray body 2 through the rotating shaft 22.

[0046] The support seat 23 is installed in the seedling raising tray body 2, and the support seat 23 is located at both ends of the bottom of the hollow plate 21, and in the initial state, the support seat 23 supports the hollow plate 21 in cooperation with the rotating shaft 22, and the support seat 23 is a lifting rod.

[0047] The control member is installed on the outside of the seedling raising tray body 2, and is used for controlling the periodic lifting of the support seat 23.

[0048] In the process of rice seedling raising, the rice seedlings are greatly affected by environmental factors, and when the seedling raising environment is in a high-temperature and high-humidity state, the rice seedlings will suffer irreversible damage in a short time after the root system is oxygen-deficient, especially the fragile new white roots. In the later stage of rice seedling raising, the root system is relatively developed, the plant density is large, and the seedling raising tray has a small space environment, so that the rice seedlings in the middle of the seedling raising tray are prone to oxygen deficiency at the bottom without turning. Therefore, in the present application, the air permeation mechanism is arranged to promote air circulation and reduce the probability of oxygen deficiency of the rice seedlings during the process of rice seedling raising.

[0049] Specifically, in the process of seedling raising, rice seeds are sown in the substrate disk 1, and the substrate disk 1 is placed side by side on the hollow plate 21 in the seedling tray body 2. In the present application, the hollow plate 21 is a straight plate structure with dense pores on the surface and is connected to the seedling tray body 2 through the middle shaft 22. The support seat 23 installed at the bottom of the seedling tray body 2 supports both ends of the hollow plate 21. Due to the presence of the hollow plate 21, there is a gap between the substrate disk 1 and the bottom of the seedling tray body 2. In the present application, the sidewall of the seedling tray body 2 is provided with a water permeable hole, and the height of the water permeable hole is close to the height of the shaft 22. Therefore, the seedling tray body 2 can store a certain depth of nutrient solution, and the nutrient solution surface is also separated from the bottom of the substrate disk 1. Therefore, air can flow through the gap between the hollow plate 21 and the nutrient solution. When the rice in the substrate disk 1 germinates and sprouts, with the passage of time, the roots of the rice seedlings will penetrate the substrate disk 1 and grow in the substrate disk 1. At this time, due to the growth of the seedlings, the substrate disk 1 will be filled, and its air permeability will be greatly reduced. At the same time, during the day, due to the increase in temperature, the photosynthesis and transpiration of the seedlings will increase, and the demand for water will also increase. At this time, the staff controls the two support seats 23 to rise and fall periodically by operating the control member. The hollow plate 21 is supported at both ends by the support seat 23. Therefore, when the support seats 23 at both ends of the hollow plate 21 rise and fall (the two support seats 23 move in opposite directions and move in a one-up-one-down manner), the hollow plate 21 will tilt under the support of the middle shaft 22. With the increase of the tilt angle of the hollow plate 21, one end of the hollow plate 21 and the substrate disk 1 on it will descend and be submerged in water, and the other end will rise and be exposed outside the seedling tray body 2. Thus, one end of the substrate disk 1 is replenished with water, and the other end of the substrate disk 1 has improved contact efficiency with the external air. With the passage of time, the periodic movement of the support seat 23 causes the hollow plate 21 to rotate in the opposite direction, causing the submerged end to gradually rise and the air-exposed end to gradually descend. Therefore, during the long process of seedling raising, the seedlings on the substrate disk 1 can alternate between water replenishment and air permeation, providing better assistance for the growth of the seedlings. It should be noted that during the process of the submerged end rising, due to the influence of gravity, part of the water on the substrate disk 1 and the hollow plate 21 will flow to the other end along the inclined surface, thereby making the water replenishment of the rice seedlings in the substrate disk 1 more uniform. Moreover, due to the frequent lifting and lowering process, when the hollow plate 21 rotates downward, the corresponding substrate disk 1 will be impacted by the water flow after descending below the liquid level, thereby causing the substrate disk 1 and the hollow plate 21 to be temporarily separated, thereby avoiding the substrate disk 1 and the hollow plate 21 being too tightly combined during the growth of the seedling roots.Provide sufficient space for seedling root growth, compared with the stable combination of substrate soft disk 1 and hollow disk, which can provide better help for the extension of root system.

[0050] The present application provides more convenient for rice seedlings to supplement water for a few times, and also can reduce the probability of oxygen deficiency of rice seedling root system by controlling water and air permeability, and provides better help for the growth of rice seedlings.

[0051] As a preferred embodiment of the present application, the control member comprises a knob 24, a spring 26, a control rod 3 and a telescopic cylinder 32.

[0052] The rotation groove 25 is provided on the seedling tray body 2, and the knob 24 and the spring 26 are rotatably installed in the rotation groove 25.

[0053] The control rod 3 is slidably installed in the linear sliding groove 31, and the linear sliding groove 31 is in communication with the rotation groove 25.

[0054] The telescopic cylinder 32 is fixedly installed at both ends of the linear sliding groove 31, and the telescopic cylinder 32 is located on the reciprocating sliding path of the control rod 3.

[0055] The insertion slot 33 is coaxially distributed with the rotation groove 25, and the knob 24 extends into the insertion slot 33.

[0056] The output end of the telescopic cylinder 32 is threadedly installed with a flow limiting rod 35, one end of the flow limiting rod 35 extends into the output end of the telescopic cylinder 32, and the other end extends to the outside of the seedling tray body 2.

[0057] In order to reduce the labor intensity of the staff, in the present application, when the support base 23 is controlled to be periodically raised, the staff only needs to manually press the knob 24, so that the knob 24 extrudes the ejection spring 34 in the slot 33, the knob 24 is dislocated with the control rod 3, and the knob 24 is rotated, so that the spiral spring 26 is gradually tensioned, and finally the pressing of the knob 24 is released, under the action of the ejection spring 34, the knob 24 is aligned with the control rod 3, and in the process of releasing the elastic potential energy of the spiral spring 26, the knob 24 rotates, when the knob 24 rotates to one side of the control rod 3, because the two ends of the control rod 3 are located in the rotation path of the knob 24, and the two ends of the control rod 3 are both tapered, so that the knob 24 generates a pushing force on the control rod 3, which promotes the control rod 3 to slide in the straight sliding groove 31, in the sliding process of the control rod 3, one side of the telescopic cylinder 32 will be extruded and separated from the other side of the telescopic cylinder 32, the telescopic cylinder 32 subjected to extrusion will transport the fluid in the pipe to the support base 23, promoting the hollow plate 21 to rotate, and when the knob 24 passes the end of the current control rod 3 and extrudes the other end of the control rod 3, it will promote the control rod 3 to move reversely in the straight sliding groove 31, finally making the rotating direction of the hollow plate 21 change again, in the continuous rotation process of the knob 24, the hollow plate 21 rotates periodically in the forward and reverse directions, so that the seedlings on the matrix disk 1 are periodically switched in the process of water replenishment and ventilation, and in the present application, a flow limiting rod 35 and an adjusting cap 36 are also provided, in actual application, the seedling raising personnel can manually twist the adjusting cap 36, so that the flow limiting rod 35 extends to or pushes out the output end of the telescopic cylinder 32, thereby adjusting the flow of the telescopic cylinder 32, to realize the adjustment of the length of the rotation period of the hollow plate, it should be known that on the outer wall of the seedling raising tray body 2, there is an associated scale corresponding to the rotation angle of the adjusting cap 36 and the flow of the telescopic cylinder 32, so as to facilitate the adjustment of the seedling raising personnel.

[0058] Meanwhile, in other embodiments of the present application, the spiral spring 26 can also use a rotating motor to control the rotation of the knob 24, so as to control the periodic lifting of the support base 23, further enhancing the convenience of using the equipment.

[0059] As a preferred embodiment of the present application, it further includes an anti-blocking separation mechanism, which is installed on the hollow plate 21, and is used to prevent the rice seedling root system from blocking the pores of the hollow plate 21.

[0060] The anti-blocking separation mechanism includes a jacking rod 4, a connecting plate 41 and a supporting spring 42.

[0061] The jacking rod 4 is fixedly installed on the connecting plate 41, and extends to the lower side of the matrix disk 1 through the pores of the hollow plate 21, and is used to jack up the matrix disk 1, and the hollow plate 21 and the connecting plate 41 are elastically connected through the supporting spring 42.

[0062] The jacking rod 4 is a spring telescopic rod, and the jacking rod 4 is T-shaped at one end away from the connecting plate 41 and is made of elastic rubber material. The jacking rod 4 made of the spring telescopic rod can utilize the elastic buffering effect to reduce the probability of root system breakage when the root system of the seedling is separated from the hollow plate 21.

[0063] The arc block 43 is installed inside the seedling tray body 2, and the arc block 43 is provided with uniformly distributed protrusions 44, wherein the protrusions 44 are made of elastic material, and the protrusions 44 are located on the rotating path of the hollow plate 21.

[0064] Because the impact force and impact area of the hollow plate 21 and the substrate disk 1 are small during rotation, in order to avoid the rice seedlings from filling the gaps between the hollow plate 21 and affecting the diffusion of air through the hollow plate 21 to the root system, a blocking separation mechanism is arranged in the application. In actual application, when the two ends of the hollow plate 21 are periodically raised and lowered, one end of the hollow plate 21 is continuously lowered, and as the gap between the hollow plate 21 and the bottom wall of the seedling tray body 2 continuously decreases, the connecting plate 41 located below the hollow plate 21 is hindered by the protrusions 44 on the arc block 43, so that the connecting plate 41 overcomes the support spring 42 and gradually approaches the hollow plate 21, and the jacking rod 4 installed on the connecting plate 41 passes through the aperture of the hollow plate 21 and is placed on the substrate disk 1 or the root system of the seedling. Through continuous jacking, the root system of the seedling and the substrate disk are gradually separated from the hollow plate 21, and the separation setting can reduce the depth of the substrate disk 1 and the seedling submerged in water, and can also avoid the root system of the seedling from excessively filling the gaps between the hollow plate 21. As the hollow plate 21 continuously rotates, the protrusions 44 are gradually deformed, and when the protrusions 44 are completely retracted into the arc block 43, the limitation of the protrusions 44 on the connecting plate 41 is invalid, so that the connecting plate 41 quickly moves away from the hollow plate 21 under the action of the support spring 42, and finally is hindered by the next protrusion 44. The intermittent interception of the protrusions 44 on the connecting plate 41 is utilized, so that the jacking rod 4 jacks the root system of the seedling or the substrate disk 1 multiple times. The jacking rod 4 made of the spring telescopic rod can utilize multiple elastic impacts to separate the root system of the seedling from the hollow plate 21, and multiple elastic impacts can also reduce the probability of root system breakage compared with direct jacking.

[0065] As a preferred embodiment of the application, the hollow plate 21 is fixedly installed with guide plates 5 on both sides, the guide plates 5 are provided with guide sliding grooves 51, and the guide plates 5 are slidably installed with pressure rollers 52 through the guide sliding grooves 51.

[0066] The guide chute 51 is arranged in a C shape with the opening facing upwards, and the pressing roller 52 is located in one end of the guide chute 51 and has a smaller diameter than the height of the guide chute 51. The arrangement of the guide chute 51 and the pressing roller 52 can guide the hollow plate 21 and the matrix floppy disk 1 to deflect under the action of gravity, and the pressing roller 52 rolls on the matrix floppy disk 1 under the limitation of the guide chute 51, thereby achieving the pressing of the rice seedlings and assisting the growth of the rice seedlings. The pressing of the rice seedlings is one of the commonly used technologies in the rice seedling raising process, and will not be described in detail here.

[0067] The guide plate 5 is located below the hollow plate 21 and is provided with a sliding groove 53, the connecting plate 41 extends into the sliding groove 53, and the sliding groove 53 is used to control the connecting plate 41 to keep parallel with the hollow plate 21. The sliding groove 53 is arranged to limit the connecting plate 41 when the one end of the connecting plate 41 is blocked, so that the connecting plate 41 can only move linearly relative to the sliding groove 53, thereby enabling the connecting plate 41 to approach or move away from the hollow plate 21 in a horizontal state. That is to say, no matter which end of the hollow plate 21 is lowered, the jacking rod 4 on the connecting plate 41 can elastically impact the matrix floppy disk 1, and when the hollow plate 21 tends to be horizontal, the connecting plate 41 moves away from the hollow plate 21.

[0068] The above shows and describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A bottomless rice seedling tray for rice cultivation, comprising a substrate tray (1) and a seedling tray body (2) for storing the substrate tray (1); Its features are: It also includes an overhead oxygen permeation mechanism, which is installed between the seedling tray (2) and the substrate tray (1). The overhead oxygen permeation mechanism reduces the probability of seedling hypoxia on the substrate tray (1) by means of overhead. The overhead oxygen permeation mechanism includes: A perforated plate (21) is installed in the seedling tray (2). The substrate soft tray (1) is evenly arranged on the perforated plate (21). A rotating shaft (22) is fixedly installed in the middle of the perforated plate (21). The perforated plate (21) is rotated and installed in the seedling tray (2) through the rotating shaft (22). Support base (23): The seedling tray (2) is equipped with a support base (23). The support base (23) is located at both ends of the bottom of the hollow plate (21). In the initial state, the support base (23) cooperates with the rotating shaft (22) to support the hollow plate (21). The support base (23) is a lifting rod. The control component is installed on the outside of the seedling tray (2) and is used to control the periodic lifting and lowering of the support base (23).

2. The bottomless rice seedling tray for rice cultivation according to claim 1, characterized in that: The control components include a knob (24), a spring (26), a control lever (3), and a telescopic cylinder (32). The seedling tray (2) is provided with a rotating groove (25) and a straight sliding groove (31). A knob (24) and a spring (26) are rotatably installed in the rotating groove (25). The two ends of the spring (26) are fixedly connected to the knob (24) and the seedling tray (2) respectively. The control rod (3) is slidably installed in the linear slide groove (31), the linear slide groove (31) is connected to the rotating groove (25), the control rod (3) is a C-shaped structure, the control rod (3) extends into the rotating groove (25), and during the rotation of the knob (24), the two ends of the control rod (3) are alternately pushed to move. Telescopic cylinders (32) are fixedly installed at both ends of the linear slide (31). The telescopic cylinders (32) are located on the reciprocating sliding path of the control rod (3). The telescopic cylinders (32) are connected to the two support seats (23) through pipes respectively.

3. The bottomless rice seedling tray for rice cultivation according to claim 2, characterized in that: The seedling tray (2) has a slot (33) on it. The slot (33) and the rotating groove (25) are coaxially distributed. The knob (24) extends into the slot (33). A push-out spring (34) is fixedly installed inside the slot (33). In the initial state, under the support of the push-out spring (34), the control rod (3) is located on the rotation path of the knob (24).

4. The bottomless rice seedling tray for rice cultivation according to claim 3, characterized in that: Each of the telescopic cylinders (32) has a flow-limiting rod (35) threadedly installed at its output end. One end of the flow-limiting rod (35) extends into the inside of the output end of the telescopic cylinder (32), and the other end extends into the outside of the seedling tray (2). An adjusting cap (36) is fixedly installed at the end of the flow-limiting rod (35) located on the outside of the seedling tray (2).

5. A bottomless rice seedling tray for rice cultivation according to claim 1 or 4, characterized in that: It also includes an anti-blocking separation mechanism, which is installed on the perforated plate (21) and is used to prevent the roots of rice seedlings from blocking the holes of the perforated plate (21); The anti-blocking separation mechanism includes a lifting rod (4), a connecting plate (41), and a support spring (42). The lifting rods (4) are all fixedly installed on the connecting plate (41). The lifting rods (4) extend through the holes of the perforated plate (21) to the bottom of the substrate floppy disk (1). The lifting rods (4) are used to lift the substrate floppy disk (1). The perforated plate (21) and the connecting plate (41) are elastically connected by a support spring (42).

6. A bottomless rice seedling tray for rice cultivation according to claim 5, characterized in that: The lifting rods (4) are all spring telescopic rods. The end of the lifting rod (4) away from the connecting plate (41) is T-shaped and made of elastic rubber material.

7. A bottomless rice seedling tray for rice cultivation according to claim 6, characterized in that: The seedling tray (2) is equipped with an arc block (43) inside. The arc block (43) is provided with evenly distributed protrusions (44). The protrusions (44) are all made of elastic material and are located on the rotation path of the hollow plate (21).

8. A bottomless rice seedling tray for rice cultivation according to claim 7, characterized in that: Guide plates (5) are fixedly installed on both sides of the hollow plate (21). Guide grooves (51) are provided on the guide plates (5). Pressure rollers (52) are slidably installed on the guide plates (5) through the guide grooves (51).

9. A bottomless rice seedling tray for rice cultivation according to claim 8, characterized in that: The guide groove (51) is C-shaped with the opening facing upwards, and the diameter of one end of the pressure roller (52) inside the guide groove (51) is smaller than the height of the guide groove (51).

10. A bottomless rice seedling tray for rice cultivation according to claim 8, characterized in that: The guide plate (5) is located below the hollow plate (21) and has a sliding groove (53). The connecting plate (41) extends into the sliding groove (53). The sliding groove (53) is used to control the connecting plate (41) and the hollow plate (21) to remain parallel.

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