A salt concentration steady-state self-regulating salt tolerance identification pool for rice seedlings

Abstract

The present invention relates to the technical field of rice physiology research and rice breeding equipment, and discloses a salt tolerance identification pool for rice seedlings with steady-state self-regulation of salt concentration. The salt tolerance identification pool for rice seedlings with steady-state self-regulation of salt concentration comprises an identification pool, the bottom of which is fixedly connected to a base frame, the top of which is movably connected to a cultivation top frame, a water exchange port is provided on one side of the cultivation top frame, and a drainage port frame is fixedly connected to the outer side of the water exchange port. The present invention solves the problem of difficulty in changing water in large turnover boxes by replacing the salt solution in the identification pool through the siphon effect; by connecting the drainage bottom pipe with the water supply pipe, the node for opening the siphon drainage is controlled, thereby achieving the effect of timely replacement of the salt solution in the identification pool; the water storage capacity change of the water storage bulb is used to control the opening and closing of the water supply valve, thereby achieving timely water replenishment after the drainage is completed, and ensuring that the concentration of the salt solution in the identification pool is always maintained within the identification concentration range.

Description

Technical Field

[0001] The invention relates to the technical field of rice physiology research and rice breeding equipment, in particular to a salt tolerance identification pool for rice seedlings with steady-state self-regulation of salt concentration. Background Art

[0002] Rice is an important food crop in my country, and research on its salt tolerance identification and evaluation has been relatively in-depth. The identification of salt tolerance of rice from the bud stage to the seedling stage is generally completed in a laboratory or greenhouse. Rice is cultivated using turnover boxes and floating boards for salt treatment, and its root and leaf growth or dry matter accumulation and other indicators are statistically observed to measure its salt tolerance.

[0003] During the rice salt tolerance test, most of the rice plants in the identification pool absorb water from the culture solution, and very little salt is absorbed. Multi-day tests and the influence of light will also cause a large amount of water in the solution to evaporate. Therefore, the salt concentration in the identification pool will continue to rise, resulting in the identified salt tolerance threshold being inconsistent with the threshold for rice growth in saline soil. Although the turnover box floating plate method can realize batch identification of rice salt tolerance from the bud stage to the seedling stage, the turnover box is large and heavy and difficult to operate. It is very inconvenient to replace the salt solution during the test, and the replacement process will cause certain damage to the salt-treated rice fibrous roots. The rice seedlings absorb different amounts of water at different growth stages, and the continuous evaporation causes the salt concentration to continue to increase, and the test system has a large error. In order to ensure the accuracy of the test results, it is necessary to constantly monitor the changes in the liquid level in the turnover box so that the salt solution can be replaced at any time. The workload required for large-scale and multi-sample identification tests is particularly heavy. Summary of the Invention

[0004] In response to the shortcomings of the existing rice seedling salt tolerance identification pool mentioned in the background technology during use, the present invention provides a rice seedling salt tolerance identification pool with steady-state self-regulation of salt concentration, which has the advantages of convenient and timely liquid replacement, and solves the technical problems mentioned in the above background technology, such as the turnover box being bulky and difficult to replace the liquid, and the liquid replacement cycle being irregular.

[0005] The present invention provides the following technical solutions: a salt concentration steady-state self-regulated rice seedling stage salt tolerance identification pool, a salt concentration steady-state self-regulated rice seedling stage salt tolerance identification pool, comprising an identification pool, the bottom of the identification pool is fixedly connected to a base frame, the top of the identification pool is movably connected to a cultivation top frame, one side of the cultivation top frame is provided with a water exchange port, the outer side of the water exchange port is fixedly connected to a drain frame, the top of the drain frame is movably installed with a pulley group, the identification pool is movably connected to a water pipe through the pulley group, and one end of the water pipe is fixed in the identification pool. A liquid infusion pipe valve is fixedly installed, the bottom of the identification pool is fixedly connected to a drainage bottom pipe, drainage ports are opened on both sides of the bottom end of the drainage bottom pipe, the top of the drainage bottom pipe is fixedly connected to a track frame, one end of the water delivery pipe outside the identification pool is fixedly connected to a "T"-shaped interface, one side of the "T"-shaped interface is fixedly connected to a water inlet pipe, a water supply valve is fixedly installed at the connection between the water inlet pipe and the "T"-shaped interface, the bottom end of the "T"-shaped interface is movably connected to a water storage ball tube, the bottom surface of the water storage ball tube is evenly provided with a number of small holes, the bottom end of the liquid infusion pipe valve The infusion tube magnetic ring is fixedly connected, and the outer side of the infusion tube magnetic ring is fixedly connected to a floating plate. The infusion tube valve includes a hydraulic switch and a touch-pressure switch. The top of the drainage bottom pipe is fixedly connected to a protruding shaft, and the periphery of the protruding shaft is fixedly connected to the bottom tube magnetic ring. The bottom of the "T"-shaped interface is fixedly connected to a spring base, and the bottom end of the spring base is fixedly connected to a reset spring. The tail end of the reset spring is fixedly connected to the water storage ball tube. Clamp holes are fixedly opened on both sides of the top of the water storage ball tube, and elastic buckles are movably installed through the clamping holes. The inner bottom end of the water delivery pipe is fixedly connected to the bottom end of the water delivery pipe. A card slot is provided on the part, the outer side of the identification pool is fixedly connected to the shell, and one side of the bottom of the shell is fixedly connected to the water outlet pipe; the connection position of the water storage ball is lower than the bottom surface of the identification pool, and the total flow volume of the small holes on the bottom surface of the water storage ball is smaller than the flow volume of the water delivery pipe; the protruding shaft can push the touch switch to open the infusion pipe valve, and the polarity of the bottom pipe magnetic ring and the opposite side of the infusion pipe magnetic ring are opposite; when the waste water in the identification pool is drained, the gravity generated by the accumulated water in the water storage ball just pulls the infusion pipe magnetic ring out of the bottom pipe magnetic ring, and the elastic buckle also just breaks away from the card slot.

[0006] Preferably, the infusion pipe valve floats up and down with the liquid level in the identification pool, and the float drives the infusion pipe valve to move up and down in the track frame, driving the water pipe to slide left and right along the pulley block.

[0007] Preferably, the water replenishment valve is a delayed self-closing valve, and the delay time is the time it takes for the liquid in the identification pool to be replenished.

[0008] The present invention has the following beneficial effects:

[0009] 1. The present invention replaces the saline solution in the identification pool by utilizing the siphon effect, thereby solving the problem of difficulty in changing water in large turnover boxes; by connecting the drainage bottom pipe and the water supply pipe, the node for opening the siphon drainage is controlled, thereby achieving the effect of timely replacement of the saline solution in the identification pool; the change in the water storage volume of the water storage bulb is used to control the opening and closing of the water supply valve, thereby achieving timely water supply after the drainage is completed, and ensuring that the concentration of the saline solution in the identification pool is always maintained within the identification concentration range.

[0010] 2. The present invention installs a water pipe on the side of the identification pool and uses the siphon effect to discharge and replace the salt solution in the identification pool through the water pipe, thereby avoiding the problem of inconvenience in replacing the salt solution during the test caused by the identification pool being bulky and difficult to operate during batch identification tests. This makes the water change operation during large-scale rice salt tolerance identification tests more convenient.

[0011] 3. The present invention controls the replacement time of the culture medium in the identification pool by installing a drainage bottom pipe on one side of the identification pool and utilizing the distance between the drainage bottom pipe and the water pipe. When the salt solution in the identification pool drops to a position close to the top of the drainage bottom pipe, the salt concentration reaches the liquid replacement concentration value. At this time, the float plate falls with the water level to a position close to the top of the drainage bottom pipe, and the two pipes are adsorbed and connected by magnetic rings at the opposite sides, thereby achieving the effect of starting siphon drainage at a fixed water level, thereby replacing the salt solution in time, reducing the workload of users and improving experimental efficiency.

[0012] 4. The present invention installs a movable water storage ball tube at the bottom of the water pipe, and controls the water pipe to automatically reset after drainage through the accumulation of water in the water storage ball tube and the change of gravity during the drainage process. At the same time, the change of water storage in the water storage ball tube is used to control the opening and closing of the water supply valve, so that water supply operation can be performed immediately after drainage is completed, ensuring that the concentration of the salt solution in the identification pool is always maintained within the identification concentration range. The entire liquid replacement operation does not require human participation, and the experimental efficiency of rice salt tolerance identification is greatly improved by conducting large-scale multi-sample identification tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the invention;

[0014] Figure 2 This is a schematic diagram of the structure of the identification pool of the present invention;

[0015] Figure 3 It is a schematic cross-sectional view of the overall structure of the present invention;

[0016] Figure 4 This is a schematic cross-sectional view of the water replenishment structure of the present invention;

[0017] Figure 5 For the present invention Figure 4 A partial enlarged schematic diagram of the structure at center A;

[0018] Figure 6 For the present invention Figure 4 A partial enlarged schematic diagram of the structure at point B in the middle;

[0019] Figure 7 This is a schematic diagram of the water storage bulb in the water-free state of the present invention.

[0020] In the figure: 1. Identification pool; 2. Base frame; 3. Cultivation top frame; 4. Drainage outlet frame; 41. Pulley block; 5. Water pipe; 51. Infusion pipe magnet; 52. Infusion pipe valve; 5201. Hydraulic switch; 5202. Touch pressure switch; 53. Spring base frame; 54. Return spring; 6. Drainage bottom pipe; 61. Bottom pipe magnet; 62. Protruding shaft; 63. Track frame; 64. Drainage outlet; 7. Water storage ball tube; 71. Elastic buckle; 72. Card slot; 8. Water inlet pipe; 81. Water supply valve; 9. Float; 10. Shell; 11. Outlet pipe. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-3A salt concentration steady-state self-regulated rice seedling salt tolerance identification pool, comprising an identification pool 1, a bottom fixedly connected to a base frame 2, a top movably connected to a cultivation top frame 3, a water exchange port is provided on one side of the cultivation top frame 3, a drainage port frame 4 is fixedly connected to the outside of the water exchange port, a pulley block 41 is movably installed on the top of the drainage port frame 4, the identification pool 1 is movably connected to a water pipe 5 through the pulley block 41, one end of the water pipe 5 extends into the identification pool 1, and the other end hangs on the outside of the identification pool 1, a liquid infusion pipe valve 52 is fixedly installed on the end of the water pipe 5 in the identification pool 1, a drainage bottom pipe 6 is fixedly connected to the bottom of the identification pool 1, and a drainage bottom pipe 6 is fixedly installed on the bottom of the identification pool 1. Drainage ports 64 are provided on both sides of the bottom end of the pipe 6, and the top of the drainage bottom pipe 6 is fixedly connected to a track frame 63. The liquid infusion pipe valve 52 is movably sleeved in the track frame 63. The liquid infusion pipe valve 52 can move up and down along the track frame 63, driving the water delivery pipe 5 to slide left and right along the pulley block 41. One end of the water delivery pipe 5 outside the identification pool 1 is fixedly connected to a "T"-shaped interface, and one side of the "T"-shaped interface is fixedly connected to a water inlet pipe 8. A water supply valve 81 is fixedly installed at the connection between the water inlet pipe 8 and the "T"-shaped interface. The bottom end of the "T"-shaped interface is fixedly connected to a water storage ball tube 7. The connection position of the water storage ball tube 7 is lower than the bottom surface of the identification pool 1, and the bottom surface of the water storage ball tube 7 is evenly provided with some The total flow rate of the small holes on the bottom of the water storage ball tube 7 is less than the flow rate of the water pipe 5, which is used to discharge water outward. The outer side of the identification pool 1 is fixedly connected to a shell 10, and one side of the bottom of the shell 10 is fixedly connected to a water outlet pipe 11. When the water in the identification pool 1 is used for a long time, the nutrients in the water are absorbed by the rice, and a large amount of salt remains, it is necessary to replace the culture medium in the identification pool 1 in time. At this time, it is only necessary to push the water pipe 5 so that one end of the water pipe 5 in the identification pool 1 moves down along the track frame 63 until it is connected to the top of the drainage bottom pipe 6. At this time, the water supply valve 81 is opened to fill the water in the water pipe 5 with liquid and then the water supply valve 81 is closed. At this time, the water in the water pipe 5 is filled with liquid. When the identification tank 1 is full of liquid, under the action of siphon, the culture solution to be replaced in the identification tank 1 enters the drainage bottom pipe 6 through the drainage port 64 and is discharged to the outside of the identification tank 1 through the water pipe 5. After the waste culture solution in the identification tank 1 is completely discharged, the water replenishment valve 81 is opened again to inject culture solution with sufficient nutrients and appropriate salt content into the identification tank 1 through the water pipe 5, thereby completing the water change operation to avoid the phenomenon of insufficient nutrients and excessive salt content in the culture solution in the identification tank 1 causing rice death during the long cultivation and identification process. At the same time, siphon drainage is performed through the water pipe 5, avoiding the operation of removing the cultivation top frame 3 and the rice seedlings above it for water change, making the operation easier and more convenient.

[0023] See also Figure 3-4The bottom end of the infusion tube valve 52 is fixedly connected to the infusion tube magnetic ring 51, and the outer side of the infusion tube magnetic ring 51 is fixedly connected to the floating plate 9. The floating plate 9 floats up and down with the liquid level in the identification pool 1, driving the infusion tube valve 52 to move up and down in the track frame 63. The infusion tube valve 52 includes a hydraulic switch 5201 and a touch pressure switch 5202. When the water in the identification pool 1 is filled with water, the hydraulic switch 5201 is no longer pressurized, so that the infusion tube valve 52 is closed. At this time, the water in the water pipe 5 is closed by the infusion tube valve 52 and retained in the water pipe 5, draining the water. The top of the bottom pipe 6 is fixedly connected with a protruding shaft 62, which can push the touch switch 5202 to open the infusion pipe valve 52. The periphery of the protruding shaft 62 is fixedly connected with a bottom pipe magnetic ring 61. The polarity of the bottom pipe magnetic ring 61 and the infusion pipe magnetic ring 51 are opposite. When the liquid level in the identification pool 1 drops to above the drainage bottom pipe 6, the floating plate 9 drives the infusion pipe magnetic ring 51 to fall until it is adsorbed and engaged with the bottom pipe magnetic ring 61. At this time, the water supply pipe 5 is connected to the drainage bottom pipe 6, and the protruding shaft 62 pushes the touch switch 5202 to open the infusion pipe valve 52. When the water in the identification pool 1 is absorbed and the salt concentration is high, the device automatically connects the water pipe 5 and the drainage bottom pipe 6 to drain water outwards through the siphon effect, so as to prevent the rice seedlings from being immersed in the high-concentration liquid for a long time and causing death or damage. When the high-concentration culture liquid is discharged outwards through the water pipe 5, the high-salinity wastewater passes through the water storage ball tube 7. Since the total flow rate of the small holes on the bottom surface of the water storage ball tube 7 is less than the flow rate of the water pipe 5, as the drainage proceeds, some water accumulates in the water storage ball tube 7, causing its weight to rise. When the wastewater in the identification pool 1 is discharged outwards through the water pipe 5, the high-salinity wastewater passes through the water storage ball tube 7. When the water is drained, the gravity generated by the accumulated water in the water storage bulb 7 just pulls the infusion tube magnetic ring 51 away from the bottom tube magnetic ring 61, so that the water delivery tube 5 slides outward along the pulley group 41 under the action of the gravity of the water storage bulb 7 until the infusion tube valve 52 slides up to the top of the track frame 63 and stops being blocked by the track frame 63. At this time, the water supply valve 81 is opened to replenish new culture medium in the identification pool 1. When the rice seedlings absorb the culture medium in the identification pool 1, causing the water level to drop and the salt to rise, the effect of automatically discharging high-salinity wastewater at a low water level is achieved.

[0024] See also Figure 5-6The water storage ball tube 7 is movably sleeved on the bottom of the "T"-shaped interface. The bottom of the "T"-shaped interface is fixedly connected to a spring base 53. The bottom end of the spring base 53 is fixedly connected to a return spring 54. The tail end of the return spring 54 is fixedly connected to the water storage ball tube 7. The return spring 54 pulls the water storage ball tube 7 up to the upper end of the water storage ball tube 7 to close the horizontal opening of the "T"-shaped interface. Both sides of the top of the water storage ball tube 7 are fixedly provided with card holes, and elastic card buckles 71 are movably installed through the card holes. A card slot 72 is provided inside the bottom end of the water delivery pipe 5. When the return spring 54 pulls the water storage ball tube 7 up to close the water inlet pipe 8, the elastic card buckle 71 extends through the card hole to the outside of the water storage ball tube 7 and is connected to the card slot 72. As the identification pool 1 is drained, The weight of the liquid accumulated in the water storage bulb 7 increases until the weight rises to the point where the magnetic ring 51 of the infusion tube is pulled away from the magnetic ring 61 of the bottom tube. The elastic buckle 71 also happens to disengage from the card slot 72, causing the water storage bulb 7 to stretch the reset spring 54 and move downward. At this time, the upper side of the water storage bulb 7 no longer closes the opening of the water inlet pipe 8, and the water supply valve 81 is opened. The hydraulic switch 5201 is pressed to open through the water supply pipe 5 to the infusion tube valve 52 to replenish the culture medium in the identification pool 1, thereby achieving the effect of automatically replenishing the identification pool 1 with new culture medium while the culture medium in the identification pool 1 is emptied, thereby avoiding the problem of damage to the rice seedlings caused by untimely water replenishment after drainage.

[0025] Among them, the water replenishment valve 81 can be a delayed self-closing valve, and the delay time is the time when the liquid in the identification pool 1 is replenished. During the delay time, the water replenishment valve 81 is automatically closed after the liquid in the identification pool 1 is replenished. A vent is provided above the water storage bulb 7 to ensure that the residual liquid in the water delivery pipe 5 is continuously stored after the infusion pipe valve 52 is closed, while the liquid in the water storage bulb 7 can be discharged from the bottom and exhausted. As the weight of the water storage bulb 7 decreases and recovers, the reset spring 54 pulls the water storage bulb 7 upward and resets, and closes the water inlet pipe 8 again. At this time, the float plate 9 floats on the liquid surface in the identification pool 1 and moves with the change of the water level in the identification pool 1.

[0026] The working principle of the method of use of the present invention is as follows:

[0027] When in use, the device is placed on a salt-tolerant identification and cultivation rack, a waste water bucket is placed at the bottom of the water storage bulb 7, one end of the water inlet pipe 8 is connected to the culture solution storage tank, and after the rice seeds to be identified are placed on the cultivation top rack 3, the water storage bulb 7 is manually pulled down to disengage the elastic buckle 71 from the card slot 72, and the water supply valve 81 is opened to fill the identification pool 1 with culture solution through the water inlet pipe 8. Within the delay time, after the liquid in the identification pool 1 is replenished, the water supply valve 81 is automatically closed. A vent is provided above the water storage bulb 7 to ensure that the residual liquid in the water delivery pipe 5 is continuously stored after the infusion pipe valve 52 is closed, and the liquid in the water storage bulb 7 can be discharged from the bottom and exhausted. The weight is reduced and restored, and the reset spring 54 pulls the water storage ball tube 7 upward and resets, and the water inlet pipe 8 is closed again. At this time, the float plate 9 floats on the liquid surface in the identification pool 1 and moves with the change of the water level in the identification pool 1. As the rice seeds grow, the culture liquid and water in the identification pool 1 are absorbed, consumed and evaporated and gradually decrease, while the salt in the culture liquid is not absorbed by the rice, resulting in the salt concentration of the culture liquid in the identification pool 1 rising above the concentration to be identified. When the water level in the identification pool 1 drops to above the drainage bottom pipe 6, the float plate 9 drives the infusion pipe magnetic ring 51 to fall until it is adsorbed and engaged with the bottom pipe magnetic ring 61. At this time, the water pipe 5 is connected to the drainage bottom pipe 6, and the protruding shaft 62 pushes the touch switch 5202 opens the infusion pipe valve 52, automatically connects the water pipe 5 and the drainage bottom pipe 6 to drain water outwards through the siphon effect, and the high-salinity wastewater passes through the water storage ball tube 7. Since the total flow rate of the small holes on the bottom surface of the water storage ball tube 7 is less than the flow rate of the water pipe 5, some water accumulates in the water storage ball tube 7 as the drainage proceeds, causing its weight to increase. When the wastewater in the identification pool 1 is drained, the gravity generated by the accumulated water in the water storage ball tube 7 just pulls the infusion pipe magnetic ring 51 away from the bottom pipe magnetic ring 61, causing the water pipe 5 to slide outwards along the pulley group 41 under the action of the gravity of the water storage ball tube 7 until the infusion pipe valve 52 slides up to the top of the track frame 63 and stops at the block of the track frame 63. As the identification pool 1 is drained, the gravity generated by the accumulated water in the water storage ball tube 7 just pulls the infusion pipe magnetic ring 51 away from the bottom pipe magnetic ring 61, causing the water pipe 5 to slide outwards along the pulley group 41 under the action of the gravity of the water storage ball tube 7 until the infusion pipe valve 52 slides up to the top of the track frame 63 and stops. As drainage proceeds, the weight of the liquid accumulated in the water storage bulb 7 increases until the weight rises to the point where the magnetic ring 51 of the infusion tube is pulled away from the magnetic ring 61 of the bottom tube. The elastic buckle 71 also happens to disengage from the card slot 72, causing the water storage bulb 7 to stretch the reset spring 54 and move downward. At this time, the upper side of the water storage bulb 7 no longer closes the opening of the water inlet pipe 8, and the water supply valve 81 is opened. The water is passed through the water supply pipe 5 to the infusion tube valve 52, and the hydraulic switch 5201 is pressed to open to replenish the culture fluid in the identification pool 1. This achieves the effect of automatically replenishing the culture fluid in the identification pool 1 with new culture fluid while the culture fluid in the identification pool 1 is emptied. At the same time, liquid is retained in the water supply pipe 5 to prepare for starting siphon drainage when the water is changed next time.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A salt concentration steady-state self-regulated rice seedling salt tolerance identification pool, comprising an identification pool (1), wherein the bottom of the identification pool (1) is fixedly connected to a bottom frame (2), and the top of the identification pool (1) is movably connected to a cultivation top frame (3), characterized in that: A water exchange port is provided on one side of the cultivation top frame (3), and a drain port frame (4) is fixedly connected to the outside of the water exchange port. A pulley block (41) is movably installed on the top of the drain port frame (4). The identification pool (1) is movably connected to a water pipe (5) through the pulley block (41). A liquid delivery pipe valve (52) is fixedly installed at one end of the water pipe (5) in the identification pool (1). A drainage bottom pipe (6) is fixedly connected to the bottom of the identification pool (1). The two bottom ends of the drainage bottom pipe (6) are connected to the bottom of the identification pool (1). A drainage port (64) is provided on the side, the top of the drainage bottom pipe (6) is fixedly connected to a track frame (63), one end of the water delivery pipe (5) outside the identification pool (1) is fixedly connected to a "T"-shaped interface, one side of the "T"-shaped interface is fixedly connected to a water inlet pipe (8), a water supply valve (81) is fixedly installed at the connection between the water inlet pipe (8) and the "T"-shaped interface, the bottom end of the "T"-shaped interface is movably connected to a water storage ball tube (7), and the bottom surface of the water storage ball tube (7) is evenly provided with The bottom end of the infusion pipe valve (52) is fixedly connected to the infusion pipe magnetic ring (51), the outer side of the infusion pipe magnetic ring (51) is fixedly connected to the floating plate (9), the infusion pipe valve (52) includes a hydraulic switch (5201) and a touch pressure switch (5202), the top end of the drainage bottom pipe (6) is fixedly connected to the protruding shaft (62), the outer periphery of the protruding shaft (62) is fixedly connected to the bottom pipe magnetic ring (61), and the bottom of the "T"-shaped interface is fixedly connected to the spring base (53). The bottom end of the spring base (53) is fixedly connected to a return spring (54), the tail end of the return spring (54) is fixedly connected to the water storage ball tube (7), the top of the water storage ball tube (7) is fixedly provided with a clamping hole on both sides, and an elastic clamping buckle (71) is movably installed through the clamping hole, the bottom end of the water delivery pipe (5) is provided with a clamping groove (72), the outer side of the identification pool (1) is fixedly connected to the housing (10), and one side of the bottom of the housing (10) is fixedly connected to the water outlet pipe (11); The connection position of the water storage ball tube (7) is lower than the bottom surface of the identification pool (1), and the total flow rate of the small holes on the bottom surface of the water storage ball tube (7) is smaller than the flow rate of the water delivery pipe (5); The protruding shaft (62) can push the touch switch (5202) to open the infusion tube valve (52), and the polarity of the bottom tube magnetic ring (61) and the infusion tube magnetic ring (51) are opposite to each other; When the wastewater in the identification pool (1) is completely drained, the gravity generated by the accumulated water in the water storage bulb (7) just pulls the infusion tube magnetic ring (51) away from the bottom tube magnetic ring (61), and the elastic buckle (71) also just disengages from the clamping groove (72).

2. The salt concentration steady-state self-regulating salt tolerance identification pool for rice seedlings according to claim 1, characterized in that: The floating plate (9) floats up and down with the liquid level in the identification pool (1), and the liquid delivery pipe valve (52) is movably sleeved in the track frame (63). The floating plate (9) drives the liquid delivery pipe valve (52) to move up and down in the track frame (63), driving the water delivery pipe (5) to slide left and right along the pulley block (41).

3. The salt tolerance identification pool for rice seedlings with steady-state self-regulation of salt concentration according to claim 1, characterized in that: The water replenishment valve (81) is a time-delayed self-closing valve, and the delay time is the time when the liquid in the identification pool (1) is completely replenished.

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