Greenhouse test device for drought resistance identification of medicago sativa seedlings

Abstract

The invention discloses a greenhouse test device for drought resistance identification of medicago sativa seedlings, and relates to the technical field of medicago sativa seedlings. The greenhouse test device comprises a bottom plate and a greenhouse cabinet fixedly arranged on the top surface of the bottom plate, a culture mechanism is arranged on the inner side of the greenhouse cabinet, and a liquid storage mechanism is arranged above the greenhouse cabinet; the culture mechanism comprises a placing part and a liquid spraying part; the device has the technical effects that blank control and treatment tests of solutions with different concentrations can be carried out at the same time through the partitioned design of the control bin, the high-concentration bin, the medium-concentration bin and the low-concentration bin, the inner side face of each bin is fixedly connected with the outer walls of the multiple placement pots, and the placement pots are arranged on the outer side faces of the multiple placement pots. The device is used for planting medicago sativa seedlings, multi-dimensional comparison and identification are achieved, scientific comparison data are provided for drought-resistant breeding, and when a solution flows through a corrugated pipe, an impeller in a connecting tank is impacted, and a rotating rod is driven to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of alfalfa seedling cultivation, in particular to a greenhouse test device for drought resistance identification of alfalfa seedling cultivation. Background Art

[0002] Alfalfa is a perennial herbaceous plant of the genus Medicago in the Leguminosae family. It has a well-developed root system, with a thick taproot that can penetrate 4 to 6 meters into the soil. It has numerous lateral roots that can penetrate deep into the soil to absorb water and nutrients, which also makes alfalfa highly drought-resistant. Its stems can be upright, clumping, or even procumbent, and are quadrangular in shape. They are glabrous or slightly pubescent. In the late flowering period, new stems will grow for the second and third time.

[0003] During planting, it is necessary to identify the drought resistance of alfalfa in order to select the alfalfa variety that is most suitable for growing in a drought environment. A greenhouse test device for drought resistance identification is required during drought resistance identification.

[0004] The solution spraying of existing greenhouse test devices for drought resistance identification is often not uniform, which cannot ensure that the seedlings in each area receive the same amount of liquid, which is prone to test errors. In addition, the spraying height is fixed and cannot be flexibly adjusted according to the different growth stages of the seedlings. This makes it difficult to accurately control the test conditions, reducing the reliability of the test results. Therefore, a greenhouse test device for drought resistance identification of alfalfa seedlings is proposed. Summary of the Invention

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the present invention provides a greenhouse test device for drought resistance identification of alfalfa seedlings, which solves the problem that the solution spraying is often not uniform, and it is impossible to ensure that the seedlings in each area receive the same amount of liquid, which easily leads to test errors; and the spraying height is fixed and cannot be flexibly adjusted according to the different growth stages of the seedlings, making it difficult to accurately control the test conditions and reducing the reliability of the test results.

[0007] (2) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: comprising a bottom plate and a greenhouse cabinet fixedly arranged on the top surface of the bottom plate, a culture mechanism being arranged inside the greenhouse cabinet, and a liquid storage mechanism being arranged above the greenhouse cabinet;

[0009] The culture mechanism includes a placement portion and a liquid spraying portion;

[0010] The placement part includes a plurality of placement basins, and the liquid spraying part includes a plurality of bellows and a plurality of liquid outlet frames;

[0011] The inner side of the greenhouse cabinet is provided with a control bin, a high concentration bin, a medium concentration bin, and a low concentration bin. The inner sides of the control bin, the high concentration bin, the medium concentration bin, and the low concentration bin are respectively fixedly connected to the outer walls of the multiple placement basins. The top surfaces of the multiple corrugated pipes are fixedly passed through the inner side of the greenhouse cabinet and extend to the top of the greenhouse cabinet. The multiple corrugated pipes are respectively located on the inner side of the high concentration bin, the medium concentration bin, and the low concentration bin. The bottom surfaces of the multiple corrugated pipes are respectively fixedly passed through with multiple connecting tanks. The bottom surfaces of the multiple connecting tanks are respectively fixedly passed through with multiple fixed pipes extending to the inner sides of the multiple connecting tanks. The outer walls of the multiple fixed pipes are respectively slidably sleeved with multiple rotating tubes. The outer walls of the multiple rotating tubes are respectively fixedly sleeved with multiple connecting frames. The bottom surfaces of the multiple rotating tubes are respectively fixedly passed through the top surfaces of multiple liquid outlet frames and extend to the inner sides of multiple liquid outlet frames.

[0012] Preferably, the liquid storage mechanism includes a liquid storage tank, a support frame is fixedly provided on the top surface of the greenhouse cabinet, the top surface of the support frame is fixedly connected to the bottom surface of the liquid storage tank, a plurality of partitions are fixedly provided on the inner side of the liquid storage tank, and the inner side of the liquid storage tank is divided into a high concentration area, a medium concentration area, and a low concentration area by the plurality of partitions. The plurality of partitions fixedly provided on the inner side of the liquid storage tank divides its inner side into a high concentration area, a medium concentration area and a low concentration area, and can store drought stress simulation solutions of different concentrations at the same time.

[0013] Preferably, a plurality of control valve tubes are fixedly passed through the top surfaces of the plurality of bellows, and the top surfaces of the plurality of control valve tubes sequentially pass through the inner side surface of the support frame and the bottom surface of the liquid storage tank and extend to the interior of the liquid storage tank. The plurality of control valve tubes are respectively located in the high concentration zone, the medium concentration zone, and the inside of the low concentration zone, and the flow of the solution can be controlled by the plurality of control valve tubes.

[0014] Preferably, the top surface of the greenhouse cabinet is slidably penetrated by a plurality of control frames extending to the inside of the greenhouse cabinet, and the plurality of control frames are respectively located on the inside of the high-concentration bin, the medium-concentration bin, and the low-concentration bin. The outer walls of the plurality of connection frames are respectively fixed with a plurality of ring rails, and the outer walls of the plurality of ring rails are respectively slidably connected to the inner sides of the plurality of control frames. The ring rails can enable the connection frame to be connected to the control frame when rotating.

[0015] Preferably, multiple rotating rods are rotatably provided on the inner sides of the multiple connecting tanks through multiple bearing seats, and multiple impellers are fixedly sleeved on the outer walls of the multiple rotating rods. When the solution flows downward along the bellows, it impacts the impellers in the connecting tank, driving the rotating rods to rotate.

[0016] Preferably, the bottom surfaces of the multiple rotating rods extend to the inner sides of the multiple rotating rods respectively, and the outer walls of the multiple rotating rods are fixedly provided with multiple groups of connecting rods respectively. The outer walls of the multiple groups of connecting rods are fixedly connected to the inner sides of the multiple rotating tubes respectively, and the rotating rods drive the rotating tubes to rotate on the fixed tubes through the connecting rods.

[0017] Preferably, multiple limiting grooves are respectively opened on the inner side surfaces of the multiple rotating tubes, and multiple fixing rings are respectively fixedly sleeved on the outer walls of the multiple fixed tubes. The multiple fixing rings are respectively slidably connected to the inner walls of the multiple limiting grooves. The cooperation between the fixing rings and the limiting grooves can make the rotating tube more stable when rotating.

[0018] Preferably, an electric telescopic rod is fixedly provided on the outer wall of the greenhouse cabinet, a control panel is fixedly provided on the top surface of the output end of the electric telescopic rod, the bottom surface of the control panel is fixedly connected to the bottom surfaces of multiple control frames, and when the output end of the electric telescopic rod is extended or retracted, the multiple control frames can be moved synchronously through the control panel.

[0019] Preferably, an air pump is fixedly provided on the top surface of the liquid storage tank, and a connecting box is fixedly provided on the bottom surface of the air outlet end of the air pump and extends to the inside of the connecting box. A plurality of exhaust pipes are fixedly provided on the bottom surface of the connecting box and extend to the inside of the connecting box. The bottom surfaces of the plurality of exhaust pipes are fixedly provided through the top surface of the liquid storage tank and extend to the inside of the liquid storage tank. The plurality of exhaust pipes are respectively located on the inside of the high concentration zone, the medium concentration zone, and the low concentration zone. A plurality of liquid inlet pipes are fixedly provided on the top surface of the liquid storage tank and extend to the inside of the liquid storage tank. The plurality of liquid inlet pipes are respectively located on the inside of the high concentration zone, the medium concentration zone, and the low concentration zone. After the air pump is turned on, the high concentration zone, the medium concentration zone and the low concentration zone inside the liquid storage tank can be inflated through the connecting box and the exhaust pipe, thereby increasing the internal pressure thereof, so that the solution can have a certain pressure when being discharged.

[0020] (3) Beneficial effects

[0021] The present invention provides a greenhouse test device for evaluating drought resistance of alfalfa seedlings. It has the following beneficial effects:

[0022] (1) A greenhouse test device for drought resistance identification of alfalfa seedlings can simultaneously carry out blank control and different concentration solution treatment tests through the zoning design of the control chamber, high concentration chamber, medium concentration chamber and low concentration chamber. The inner side of each chamber is fixedly connected to the outer wall of multiple placement basins for planting alfalfa seedlings, realizing multi-dimensional comparative identification and providing scientific control data for drought-resistant breeding. When the solution flows through the corrugated pipe, it impacts the impeller in the connecting tank, driving the rotating rod to rotate. The rotating rod drives the rotating tube to rotate on the fixed tube through the connecting rod, so that the connected liquid outlet frame can achieve 360° uniform spraying, ensuring that the seedlings in each chamber receive the same amount of liquid. To avoid test errors caused by uneven spraying, the electric telescopic rod on the outer wall of the greenhouse cabinet drives the control frame to move through the control panel, and the control frame drives the ring rail and the connecting frame to move, thereby flexibly adjusting the height of the liquid outlet frame to adapt to the spraying needs of seedlings in different growth stages and improve the controllability of test conditions. The pots are fixedly connected to each bin to ensure the stability of the culture position; the limiting groove on the inner side of the rotating tube slides with the fixed ring fixed on the outer wall of the fixed tube to realize the rotation guide of the rotating tube; the connecting frame fixed on the outer wall of the rotating tube is fixed to the ring rail, and the outer wall of the ring rail is slidably connected to the inner side of the control frame to ensure a smooth lifting process of the liquid outlet frame.

[0023] (2) This greenhouse test device for drought resistance identification of alfalfa seedlings has multiple partitions fixedly installed on the inner side of the liquid storage tank, which divides the inner side into a high concentration area, a medium concentration area, and a low concentration area. It can store drought stress simulation solutions of different concentrations at the same time. The top surfaces of multiple control valve pipes sequentially pass through the inner side of the support frame and the bottom surface of the liquid storage tank and extend to the inside of the liquid storage tank. They are respectively located in the high concentration area, the medium concentration area, and the low concentration area. They cooperate to achieve accurate liquid supply to each culture chamber and meet the solution supply needs of multiple groups of comparative tests. The air pump on the top surface of the liquid storage tank has an air outlet connected to multiple exhaust pipes through a connecting box. The exhaust pipes are respectively located in the high concentration area, the medium concentration area, and the low concentration area. The air pump inflates and pressurizes the liquid storage tank so that the solution has a constant pressure when it is discharged, overcoming the flow rate fluctuation problem of gravity liquid supply, ensuring the stable delivery of the solution to each culture chamber, and improving the test efficiency and data repeatability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0025] Figure 2 It is a schematic diagram of the overall internal structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure inside the connecting tank in the culture mechanism of the present invention;

[0027] Figure 4 Schematic diagram of the structure of the control frame in the culture mechanism of the present invention;

[0028] Figure 5 Schematic diagram of the internal structure of the liquid storage mechanism of the present invention;

[0029] Figure 6 For the present invention Figure 3 Schematic diagram of the structure of the enlarged area A in the middle;

[0030] Figure 7 For the present invention Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0031] In the figure: 1. bottom plate; 2. greenhouse cabinet; 3. cultivation mechanism; 31. control chamber; 32. high concentration chamber; 33. medium concentration chamber; 34. low concentration chamber; 35. placement basin; 36. liquid outlet frame; 37. impeller; 38. bellows; 39. control valve pipe; 310. connecting frame; 311. rotating pipe; 312. control frame; 313. electric telescopic rod; 314. control board; 315. connecting rod; 316. rotating rod; 317. fixing ring; 318. ring rail; 319. fixing pipe; 320. connecting tank; 4. liquid storage mechanism; 41. support frame; 42. liquid storage tank; 43. connecting box; 44. air pump; 45. liquid inlet pipe; 46. exhaust pipe; 47. partition. DETAILED DESCRIPTION

[0032] 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.

[0033] See also Figure 1-7 The present invention provides a technical solution: comprising a bottom plate 1 and a greenhouse cabinet 2 fixedly arranged on the top surface of the bottom plate 1, a culture mechanism 3 is arranged inside the greenhouse cabinet 2, and a liquid storage mechanism 4 is arranged above the greenhouse cabinet 2;

[0034] The culture mechanism 3 includes a placement portion and a liquid spraying portion;

[0035] The placement portion includes a plurality of placement basins 35, and the liquid spraying portion includes a plurality of bellows 38 and a plurality of liquid outlet frames 36;

[0036] The inside of the greenhouse cabinet 2 is provided with a control bin 31, a high concentration bin 32, a medium concentration bin 33, and a low concentration bin 34. The inner sides of the control bin 31, the high concentration bin 32, the medium concentration bin 33, and the low concentration bin 34 are fixedly connected to the outer walls of the multiple placement basins 35, and the top surfaces of the multiple bellows 38 are fixedly penetrated through the inner side of the greenhouse cabinet 2 and extend to the top of the greenhouse cabinet 2. The multiple bellows 38 are respectively located on the inside of the high concentration bin 32, the medium concentration bin 33, and the low concentration bin 34. The bottom surfaces of the multiple bellows 38 are respectively fixedly penetrated with multiple connecting tanks 320, and the bottom surfaces of the multiple connecting tanks 320 are respectively fixedly penetrated with multiple fixed pipes. 319 extends to the inner side of multiple connecting tanks 320, multiple fixed tubes 319 outer walls are respectively slidably sleeved with multiple rotating tubes 311, multiple rotating tubes 311 outer walls are respectively fixedly sleeved with multiple connecting frames 310, multiple rotating tubes 311 bottom surfaces are respectively fixed through multiple liquid outlet frames 36 top surfaces extend to the inner side of multiple liquid outlet frames 36, multiple bellows 38 top surfaces are respectively fixed through with multiple control valve tubes 39, multiple control valve tubes 39 top surfaces sequentially penetrate the inner side surface of the support frame 41 and the bottom surface of the liquid storage tank 42 and extend to the inside of the liquid storage tank 42, multiple control valve tubes 39 are respectively located in the high concentration area, the medium concentration area, and, and On the inside of the low concentration area, the top surface of the greenhouse cabinet 2 is slidably penetrated and provided with a plurality of control frames 312 extending to the inside of the greenhouse cabinet 2. The plurality of control frames 312 are respectively located on the inside of the high concentration bin 32, the medium concentration bin 33, and the low concentration bin 34. The outer walls of the plurality of connection frames 310 are respectively fixed with a plurality of ring rails 318. The outer walls of the plurality of ring rails 318 are respectively slidably connected to the inner sides of the plurality of control frames 312. The inner sides of the plurality of connection tanks 320 are respectively rotatably provided with a plurality of rotating rods 316 through a plurality of bearing seats. The outer walls of the plurality of rotating rods 316 are respectively fixed with a plurality of impellers 37. The bottom surfaces of the plurality of rotating rods 316 extend to the plurality of rotating On the inner side of the rod 316, multiple groups of connecting rods 315 are fixedly provided on the outer walls of the multiple rotating rods 316. The outer walls of the multiple connecting rods 315 are respectively fixedly connected to the inner sides of the multiple rotating tubes 311. The inner sides of the multiple rotating tubes 311 are respectively provided with multiple limiting grooves. The outer walls of the multiple fixed tubes 319 are respectively fixedly sleeved with multiple fixing rings 317. The outer surfaces of the multiple fixing rings 317 are respectively slidably connected to the inner walls of the multiple limiting grooves. The outer wall of the greenhouse cabinet 2 is fixedly provided with an electric telescopic rod 313. The top surface of the output end of the electric telescopic rod 313 is fixedly provided with a control board 314. The bottom surface of the control board 314 is fixedly connected to the bottom surface of the multiple control frames 312.

[0037] The liquid storage mechanism 4 includes a liquid storage tank 42. A support frame 41 is fixedly provided on the top surface of the greenhouse cabinet 2. The top surface of the support frame 41 is fixedly connected to the bottom surface of the liquid storage tank 42. A plurality of partitions 47 are fixedly provided on the inner side of the liquid storage tank 42. The inner side of the liquid storage tank 42 is divided into a high concentration area, a medium concentration area, and a low concentration area by the plurality of partitions 47. An air pump 44 is fixedly provided on the top surface of the liquid storage tank 42. The bottom surface of the air outlet end of the air pump 44 is fixedly penetrated by a connecting box 43 extending to the inside of the connecting box 43. The connecting box A plurality of exhaust pipes 46 are fixedly provided on the bottom surface of 43 and extend to the inside of the connection box 43. The bottom surfaces of the plurality of exhaust pipes 46 are fixedly provided on the top surface of the liquid storage tank 42 and extend to the inside of the liquid storage tank 42. The plurality of exhaust pipes 46 are respectively located on the inside of the high concentration zone, the medium concentration zone, and the low concentration zone. A plurality of liquid inlet pipes 45 are fixedly provided on the top surface of the liquid storage tank 42 and extend to the inside of the liquid storage tank 42. The plurality of liquid inlet pipes 45 are respectively located on the inside of the high concentration zone, the medium concentration zone, and the low concentration zone.

[0038] When in use, first, the solutions of different concentrations are injected into the high concentration area, medium concentration area and low concentration area formed by the partition 47 inside the liquid storage tank 42 through the liquid inlet pipe 45 on the top surface of the liquid storage tank 42;

[0039] At the beginning of the experiment, alfalfa seedlings were planted in the placement basins 35 in the control chamber 31, high concentration chamber 32, medium concentration chamber 33 and low concentration chamber 34 respectively. For the high concentration chamber 32, medium concentration chamber 33 and low concentration chamber 34 to which different concentration solutions were applied, the control valve tube 39 on the top surface of the corresponding bellows 38 was opened. Under the action of gravity, the solution in the corresponding concentration zone in the liquid storage tank 42 flowed into the bellows 38 through the control valve tube 39. When the solution flowed downward along the bellows 38, it impacted the impeller 37 in the connecting tank 320, driving the rotating rod 316 to rotate. The rotating rod 316 drove the rotating tube 316 through the connecting rod 315. 311 rotates on the fixed tube 319. During the rotation of the rotating tube 311, the connecting frame 310 is driven to slide on the circular track 318, so that the solution in the liquid outlet frame 36 can be evenly sprayed on the alfalfa seedlings in the placement basin 35, thereby achieving differentiated liquid treatment of alfalfa seedlings in different areas. After the solution enters the interior of the bellows 38, the air pump 44 is turned on. After the air pump 44 is turned on, it can inflate the high concentration area, medium concentration area and low concentration area inside the liquid storage tank 42 through the connecting box 43 and the exhaust pipe 46, thereby increasing the internal pressure and ensuring that the solution has a certain pressure when it is discharged.

[0040] The alfalfa seedlings in the control chamber 31 are not treated with the above-mentioned solutions of different concentrations and serve as control samples for comparison with the growth of seedlings in other treatment areas. During the test, if it is necessary to adjust the spraying height of the liquid outlet frame 36, the electric telescopic rod 313 on the outer wall of the greenhouse cabinet 2 can be activated. The electric telescopic rod 313 drives the control frame 312 to move through the control panel 314, and the control frame 312 drives the ring rail 318 and the connecting frame 310 to move, thereby adjusting the position of the rotating tube 311 and the liquid outlet frame 36 to meet different test requirements.

[0041] The experimenters identified and evaluated the drought resistance of alfalfa by observing the differences in various indicators of alfalfa seedlings during their growth process in the control bin 31 and the high-concentration bin 32, the medium-concentration bin 33, and the low-concentration bin 34, thereby providing a scientific basis for drought-resistant breeding and cultivation of alfalfa.

[0042] 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, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0043] 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 greenhouse test device for evaluating drought resistance of alfalfa seedlings, comprising a base plate (1) and a greenhouse cabinet (2) fixedly arranged on the top surface of the base plate (1), characterized in that: A cultivation mechanism (3) is provided inside the greenhouse cabinet (2), and a liquid storage mechanism (4) is provided above the greenhouse cabinet (2); The culture mechanism (3) comprises a placement portion and a liquid spraying portion; The placement portion includes a plurality of placement basins (35), and the liquid spraying portion includes a plurality of bellows (38) and a plurality of liquid outlet frames (36); The inner side of the greenhouse cabinet (2) is provided with a control chamber (31), a high concentration chamber (32), a medium concentration chamber (33), and a low concentration chamber (34). The inner side surfaces of the control chamber (31), the high concentration chamber (32), the medium concentration chamber (33), and the low concentration chamber (34) are respectively fixedly connected to the outer walls of a plurality of placement basins (35). The top surfaces of the plurality of corrugated pipes (38) are fixedly passed through the inner side surface of the greenhouse cabinet (2) and extend to the upper side of the greenhouse cabinet (2). The plurality of corrugated pipes (38) are respectively located in the high concentration chamber (32), the medium concentration chamber (33), and the low concentration chamber (34). On the side, the bottom surfaces of the plurality of bellows (38) are respectively fixedly penetrated with a plurality of connecting tanks (320), the bottom surfaces of the plurality of connecting tanks (320) are respectively fixedly penetrated with a plurality of fixed tubes (319) extending to the inner sides of the plurality of connecting tanks (320), the outer walls of the plurality of fixed tubes (319) are respectively slidably sleeved with a plurality of rotating tubes (311), the outer walls of the plurality of rotating tubes (311) are respectively fixedly sleeved with a plurality of connecting frames (310), and the bottom surfaces of the plurality of rotating tubes (311) are respectively fixedly penetrated with the top surfaces of the plurality of liquid outlet frames (36) and extend to the inner sides of the plurality of liquid outlet frames (36).

2. The greenhouse test device for drought resistance evaluation of alfalfa seedlings according to claim 1, characterized in that: The liquid storage mechanism (4) comprises a liquid storage tank (42); a support frame (41) is fixedly provided on the top surface of the greenhouse cabinet (2); the top surface of the support frame (41) is fixedly connected to the bottom surface of the liquid storage tank (42); a plurality of partitions (47) are fixedly provided on the inner side surface of the liquid storage tank (42); and the inner side of the liquid storage tank (42) is divided into a high concentration area, a medium concentration area, and a low concentration area by the plurality of partitions (47).

3. The greenhouse test device for drought resistance evaluation of alfalfa seedlings according to claim 2, characterized in that: A plurality of control valve tubes (39) are fixedly provided on the top surfaces of the plurality of bellows (38), and the top surfaces of the plurality of control valve tubes (39) sequentially penetrate the inner side surface of the support frame (41) and the bottom surface of the liquid storage tank (42) and extend to the interior of the liquid storage tank (42). The plurality of control valve tubes (39) are respectively located inside the high concentration zone, the medium concentration zone, and the low concentration zone.

4. The greenhouse test device for drought resistance evaluation of alfalfa seedlings according to claim 1, characterized in that: The top surface of the greenhouse cabinet (2) is slidably penetrated by a plurality of control racks (312) extending to the inner side of the greenhouse cabinet (2); the plurality of control racks (312) are respectively located inside the high-concentration bin (32), the medium-concentration bin (33), and the low-concentration bin (34); the outer walls of the plurality of connection frames (310) are respectively fixedly sleeved with a plurality of ring rails (318); the outer walls of the plurality of ring rails (318) are respectively slidably connected to the inner side surfaces of the plurality of control racks (312).

5. The greenhouse test device for drought resistance evaluation of alfalfa seedlings according to claim 1, characterized in that: The inner sides of the plurality of connecting tanks (320) are rotatably provided with a plurality of rotating rods (316) through a plurality of bearing seats, and the outer walls of the plurality of rotating rods (316) are fixedly sleeved with a plurality of impellers (37).

6. The greenhouse test device for evaluating drought resistance of alfalfa seedlings according to claim 5, characterized in that: The bottom surfaces of the plurality of rotating rods (316) respectively extend to the inner sides of the plurality of rotating rods (316), and the outer walls of the plurality of rotating rods (316) are respectively fixedly provided with a plurality of connecting rods (315), and the outer walls of the plurality of connecting rods (315) are respectively fixedly connected to the inner sides of the plurality of rotating tubes (311).

7. The greenhouse test device for evaluating drought resistance of alfalfa seedlings according to claim 1, characterized in that: The inner sides of the plurality of rotating tubes (311) are respectively provided with a plurality of limiting grooves, the outer walls of the plurality of fixed tubes (319) are respectively fixedly sleeved with a plurality of fixing rings (317), and the outer surfaces of the plurality of fixing rings (317) are respectively slidably connected to the inner walls of the plurality of limiting grooves.

8. The greenhouse test device for evaluating drought resistance of alfalfa seedlings according to claim 4, characterized in that: An electric telescopic rod (313) is fixedly provided on the outer wall of the greenhouse cabinet (2); a control panel (314) is fixedly provided on the top surface of the output end of the electric telescopic rod (313); and the bottom surface of the control panel (314) is fixedly connected to the bottom surfaces of multiple control frames (312).

9. The greenhouse test device for evaluating drought resistance of alfalfa seedlings according to claim 2, characterized in that: An air pump (44) is fixedly provided on the top surface of the liquid storage tank (42); a connection box (43) is fixedly provided on the bottom surface of the air outlet end of the air pump (44) and extends to the inside of the connection box (43); a plurality of exhaust pipes (46) are fixedly provided on the bottom surface of the connection box (43) and extend to the inside of the connection box (43); the bottom surfaces of the plurality of exhaust pipes (46) are fixedly provided on the top surface of the liquid storage tank (42) and extend to the inside of the liquid storage tank (42); the plurality of exhaust pipes (46) are respectively located in the high concentration zone, the medium concentration zone, and the inside of the low concentration zone; a plurality of liquid inlet pipes (45) are fixedly provided on the top surface of the liquid storage tank (42) and extend to the inside of the liquid storage tank (42); the plurality of liquid inlet pipes (45) are respectively located in the high concentration zone, the medium concentration zone, and the inside of the low concentration zone.

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