A hydroponic rice cultivation device adapted to gradient salt stress

Abstract

This utility model discloses a hydroponic rice cultivation device adapted to gradient salt stress, belonging to the field of rice cultivation technology. It includes a box body with a door hinged to the front. Several monitoring ports are located above the door. Five culture chambers are arranged in a straight line inside the box body via a movable component. The movable component includes a sliding track and a support plate. The sliding track is symmetrically arranged on the inner wall of the box body. The support plate is slidably connected to the sliding track via a slider at its bottom. A limit structure is fixed on the side of the sliding track near the door. A liquid replenishment component is located above the culture chambers. This utility model, using the aforementioned hydroponic rice cultivation device adapted to gradient salt stress, allows the culture chambers to be flexibly moved out of the box body via the movable component. This solves the problem of increased plant height and blocked light inside the box during the later stages of rice growth, ensuring that the rice receives sufficient light and guaranteeing experimental results.

Description

Technical Field

[0001] This utility model relates to the field of rice cultivation technology, and in particular to a hydroponic rice cultivation device adapted to gradient salt stress. Background Technology

[0002] Rice is one of the major food crops, and its growth and development are easily affected by soil salt stress. Soil salinization has become an important environmental factor restricting the improvement of rice yield and quality. In rice salt tolerance research, gradient salt stress experiments are the core means to explore the salt tolerance mechanism of rice and screen salt-tolerant varieties. Hydroponic cultivation is widely used in this type of experiment because it can precisely control environmental conditions such as nutrient composition and salt concentration.

[0003] Currently, existing hydroponic rice cultivation devices have the following shortcomings: it is difficult to simultaneously cultivate multiple gradient salt stresses; most devices can only provide a single salt concentration environment; conducting gradient experiments requires multiple independent devices, which occupy a lot of space and are costly; the increased plant height in the later stages of rice growth can easily cause internal light shading; traditional devices can easily impact the root system when replenishing liquid, and poor waste liquid discharge can lead to water accumulation and rotting of the roots, affecting the stability of the experiment. Utility Model Content

[0004] This invention aims to solve the problems of existing hydroponic devices being unable to conduct multi-gradient salt stress experiments simultaneously, rice being prone to shading in the later stages, root damage from liquid replenishment, and root rot due to water accumulation. It is particularly suitable for breeding salt-tolerant rice varieties and screening, achieving high-precision, stable, and efficient gradient salt stress hydroponic cultivation.

[0005] To achieve the above objectives, this utility model provides a hydroponic rice cultivation device adapted to gradient salt stress, comprising a box body, a door connected to the front of the box body by a hinge, several monitoring ports above the door, and five sets of cultivation chambers arranged inside the box body by a moving component. The five sets of cultivation chambers are all cuboid structures with open tops and are evenly distributed in a straight line inside the box body. The moving component includes a sliding rail and a support plate. The sliding rail is symmetrically arranged on the inner side wall of the box body. The support plate is slidably connected to the sliding rail by a slider at the bottom. The slider and the sliding rail are matched in size, and a limit structure is fixedly provided on the side of the sliding rail near the door. A liquid replenishment component is provided above the cultivation chamber.

[0006] Preferably, each of the four corners of the bottom of the chamber is provided with a caster wheel, one of which has a self-locking structure. The chamber door is provided with a door handle, and the monitoring port is threadedly connected with a sealing cap. The sealing cap is fixedly provided with a protrusion, and the center position of the monitoring port is aligned with the center position of the corresponding culture chamber.

[0007] Preferably, a transparent observation window and a display screen are provided on the back of the chamber, and the position of the transparent observation window corresponds to the position of the 5 independent sealed culture chambers.

[0008] Preferably, a temperature and humidity sensor is installed on the inner side wall of the chamber opposite to the chamber door. The number of temperature and humidity sensors corresponds to the number of culture chambers and is connected to a display screen on the outside of the chamber.

[0009] Preferably, a culture tray is placed inside each culture chamber via a support rod. The width of the culture tray is smaller than the width of the culture chamber, the height of the culture tray is smaller than the height of the culture chamber, and the length of the culture tray is the same as the length of the culture chamber. Several culture holes are evenly arranged on the culture tray.

[0010] Preferably, partitions are provided at equal intervals above the support plate, and the partitions are positioned between adjacent culture chambers. The support plate and the partitions form a placement groove for placing the culture chambers. The top of each partition is slidably connected to the top of the box body via ball bearings. The front of the support plate is provided with a groove, and a handle is provided inside the groove. The handle is rotatably connected to the groove via a rotating shaft.

[0011] Preferably, a flow guide port is provided at the center of the bottom of each culture chamber. The flow guide port is located on the side away from the door and extends through the bottom of the culture chamber and the support plate. A solenoid valve is provided on the flow guide port.

[0012] Preferably, a leakage recovery tank is provided at the bottom of the chamber, directly below the culture chamber and the support plate. A drain outlet is provided on the right side of the leakage recovery tank, penetrating the right side wall of the chamber, and a valve is provided at the drain outlet.

[0013] Preferably, the fluid replenishment assembly includes a main reservoir, branch infusion tubing, and a flow control valve. The main reservoir consists of five independently configured reservoirs, corresponding to the number of culture chambers. The main reservoirs are fixedly installed on the top of the housing. The branch infusion tubing is made of silicone tubing. One end of each of the five branch infusion tubing is connected to the bottom outlet of the main reservoir, and the other end extends through the top of the housing to the upper part of the corresponding culture chamber, located between the culture chamber and the culture tray. The outlet of the infusion tubing is kept at a certain distance from the bottom of the culture chamber and faces the inner wall of the culture chamber. The flow control valve is installed on each branch infusion tubing.

[0014] Preferably, supplementary lights are fixedly installed inside the chamber by a bracket. The number of supplementary lights corresponds to the culture chamber, and each supplementary light is placed above the culture chamber with its luminescent surface facing the culture chamber.

[0015] Therefore, the present invention employs the above-mentioned adaptive hydroponic rice cultivation device for gradient salt stress, which has the following beneficial effects:

[0016] (1) Rice culture experiments with different salt stress levels can be carried out simultaneously without the need for multiple independent devices, which saves space and cost, and ensures that each culture chamber is in the same temperature, humidity and light environment, effectively reducing experimental errors and providing precise experimental conditions for rice salt resistance research.

[0017] (2) The culture chamber can be flexibly moved out of the box by the movable component, which solves the problem of increased plant height and blocked light in the box during the later stage of rice growth, ensuring that the rice can receive enough light and guaranteeing the experimental results.

[0018] (3) The liquid replenishment component adopts a branch infusion design. Each branch infusion tube is equipped with a flow control valve, which can independently adjust the liquid replenishment speed and volume of each culture chamber to ensure that the salt concentration of each culture chamber is maintained at the set value, avoid salt concentration fluctuations caused by uneven liquid replenishment, and ensure the stability and repeatability of the experiment. The outlet of the infusion tube faces the inner wall of the culture chamber and is kept at a certain distance from the bottom to prevent the liquid replenishment from impacting the rice roots and protect the normal growth of the plants.

[0019] (4) Each culture chamber is equipped with a water-permeable hole and a flow guide at the bottom, which are connected to the leakage recovery tank. This allows excess nutrient solution to be discharged in time, effectively preventing water accumulation and rotting of rice roots, providing a good ventilation environment for rice root growth, and ensuring the smooth progress of the experiment.

[0020] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a hydroponic rice cultivation device adapted to gradient salt stress according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the interior of the box body according to an embodiment of the present utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the side wall of the box body with a transparent observation window in an embodiment of the present invention;

[0024] Figure 4 This is a structural diagram of the back of the box according to an embodiment of the present utility model;

[0025] Figure 5 This is a structural schematic diagram of the front of the support plate in an embodiment of the present utility model;

[0026] Figure Labels

[0027] 1. Chamber; 2. Casters; 3. Door; 4. Moving assembly; 41. Sliding rail; 42. Support plate; 43. Slider; 44. Partition; 5. Culture chamber; 6. Liquid replenishment assembly; 61. Main storage tank; 62. Branch infusion tubing; 63. Flow control valve; 7. Door handle; 8. Transparent observation window; 9. Display screen; 10. Temperature and humidity sensor; 11. Culture tray; 12. Inlet; 13. Solenoid valve; 14. Leakage recovery tank; 15. Drain outlet; 16. Supplemental light; 17. Sealing cap; 18. Protrusion; 19. Handle. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Example

[0031] like Figure 1-5 As shown, this utility model provides a hydroponic rice cultivation device suitable for breeding under gradient salt stress, including a box body 1, with a caster wheel 2 at each of the four corners of the bottom of the box body 1, one of the caster wheels 2 having a self-locking structure; a box door 3 is rotatably connected to the front of the box body 1 via a hinge, with several monitoring ports above the box door 3; and five sets of culture chambers 5 are set inside the box body 1 via a moving component 4, with a liquid replenishment component 6 above the culture chambers.

[0032] A sealing cap 17 is threaded onto the monitoring port, and a protrusion 18 is fixedly provided on the sealing cap 17 to facilitate loosening or tightening the sealing cap 17. The center position of the monitoring port is aligned with the center position of the corresponding culture chamber 5. Experimenters can open the sealing cap 17 and insert tools such as plant height measuring ruler, root length measuring instrument, and chlorophyll measuring instrument into the culture chamber 5 to complete non-destructive testing.

[0033] A door handle 7 is provided on the box door 3.

[0034] The back of the box 1 is equipped with a transparent observation window 8 and a display screen 9. The position of the transparent observation window 8 corresponds to the position of the 5 sets of culture chambers 5, which makes it convenient for the experimenters to observe the growth status of rice directly.

[0035] Temperature and humidity sensors 10 are installed on the inner side wall of the chamber 1 opposite to the door 3. The number of temperature and humidity sensors 10 corresponds to the number of culture chambers 5 and is connected to the display screen 9 on the outside of the chamber 1. The temperature and humidity inside the chamber 1 can be monitored in real time, and the monitoring data can be displayed on the display screen 9.

[0036] The five culture chambers 5 are all rectangular structures with open tops. The five culture chambers 5 are evenly distributed in a straight line inside the box 1. Each culture chamber 5 has a culture tray 11 placed inside it by a support rod. The width of the culture tray 11 is smaller than the width of the culture chamber 5, the height of the culture tray 11 is smaller than the height of the culture chamber 5, and the length of the culture tray 11 is the same as the length of the culture chamber 5. Several culture holes are evenly arranged on the culture tray 11.

[0037] The moving component 4 includes a sliding rail 41 and a support plate 42. The sliding rail 41 is symmetrically arranged on the inner side wall of the housing 1. The support plate 42 is slidably connected to the sliding rail 41 via a slider 43 at its bottom. The slider 43 is adapted to the size of the sliding rail 41, and a limit structure is fixedly provided on the side of the sliding rail 41 near the door 3 to prevent the slider 43 from falling out. Partitions 44 are evenly spaced above the support plate 42 and are arranged between adjacent culture chambers 5. The support plate 42 and the partitions 44 form a placement groove for placing the culture chambers 5. The top of each partition 44 is slidably connected to the top of the housing 1 via ball bearings.

[0038] The front of the bearing plate 42 is provided with a groove, and a handle 19 is provided inside the groove. The handle 19 is rotatably connected to the groove via a rotating shaft.

[0039] A flow guide port 12 is provided at the center of the bottom of each culture chamber 5. The flow guide port 12 is located on the side away from the door 3, so that even when the culture chamber 5 is pulled out with the moving component 4, the bottom of the flow guide port 12 is still above the leakage recovery tank 14. The flow guide port 12 penetrates the bottom of the culture chamber 5 and the support plate 42; a solenoid valve 13 is provided on the flow guide port 12.

[0040] The bottom of the chamber 1 is provided with a leakage recovery tank 14, which is located directly below the culture chamber 5 and the support plate 42. A drain outlet 15 is provided on the right side of the leakage recovery tank 14. The drain outlet 15 penetrates the right side wall of the chamber 1. A valve is provided at the drain outlet 15. Opening the valve can discharge the waste liquid in the leakage recovery tank 14.

[0041] The fluid replenishment assembly 6 includes a main reservoir 61, branch infusion tubes 62, and a flow control valve 63. The main reservoir 61 consists of five independently configured reservoirs, corresponding to the number of culture chambers 5, and is fixedly installed on the top of the housing 1. The branch infusion tubes 62 are all made of silicone tubing. One end of each of the five branch infusion tubes 62 is connected to the bottom outlet of the main reservoir 61, and the other end extends through the top of the housing 1 to the upper part of the corresponding culture chamber 5, located between the culture chamber 5 and the culture tray 11. The outlet of the infusion tube is kept at a certain distance from the bottom of the culture chamber 5 and faces the inner wall of the culture chamber 5. Each branch infusion tube 62 is equipped with a flow control valve 63. The fluid replenishment speed and volume can be controlled by adjusting the opening of the flow control valve 63 to achieve fluid replenishment operation for each culture chamber 5.

[0042] Nutrient solutions with different salt concentrations are prepared inside the main storage tank 61 to realize a gradient salt stress experiment (which can be set as a control group, mild stress group, moderate stress group, and severe stress group respectively).

[0043] Inside the box 1, supplementary lights 16 are fixedly installed by brackets. The number of supplementary lights 16 corresponds to the number of culture chambers 5. Each supplementary light 16 is placed above the culture chamber 5 with its light-emitting surface facing the culture chamber 5. When the culture chamber 5 is moved out of the box 1, all supplementary lights 16 can be turned off. When the culture chamber 5 is inside the box 1, the corresponding supplementary lights 16 can be turned on according to the growth needs of rice to conduct a control experiment.

[0044] The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding that are mature in existing technology. The machinery, parts and equipment all adopt conventional models in existing technology. In addition, the circuit connection adopts conventional connection methods in existing technology, which will not be described in detail here.

[0045] In this embodiment, a hydroponic rice cultivation device adapted to gradient salt stress is used by first preparing gradient salt solutions of different concentrations (control group, mild stress group, moderate stress group, and severe stress group) in five main storage tanks 61. For example, the five main storage tanks 61 contain salt solutions of 0 mmol / L, 60 mmol / L, 90 mmol / L, 120 mmol / L, and 150 mmol / L, respectively. The actual salt solution concentration in the five main storage tanks 61 can be modified according to the experimental purpose. Rice seedlings are planted in cultivation trays 11, and then the cultivation trays 11 are placed on the support rods of each cultivation chamber 5. The cultivation chamber 5 is pushed into the box body 1 and fixed by the support plate 42 of the moving component 4, and the box door 3 is closed. The temperature and humidity around each cultivation chamber 5 in the box body 1 is monitored in real time by the temperature and humidity sensor 10, and the data is transmitted to the display screen 9 for the experimenter to view. The supplemental lighting 16 above the corresponding culture chamber 5 provides illumination for rice growth. By adjusting the flow control valves 63 on each branch infusion pipe 62, the gradient saline solution in the main storage tank 61 is precisely delivered to the corresponding culture chamber 5, controlling the replenishment rate and volume to maintain a stable salt concentration in each culture chamber 5. During the experiment, the sealing cover 17 can be opened through the monitoring port to insert measuring tools for non-destructive measurement of rice growth indicators. If it is necessary to clean the culture chamber 5 or replace the culture trays 11, the support plate 42 can be pulled out along the sliding track 41 through the handle 19 on the support plate 42, and then pushed back and fixed by the limiting structure after the operation is completed. Nutrient solution that leaks during cultivation flows into the leakage recovery tank 14 through the guide port 12 at the bottom of the culture chamber 5. The waste liquid is discharged periodically by opening the valve of the sewage outlet 15 to achieve resource recovery and environmental protection, thus completing the hydroponic cultivation experiment of rice under gradient salt stress. At the same time, the moving component 4 can move the rice out to ensure sufficient light and ventilation conditions.

[0046] Therefore, this utility model employs the aforementioned hydroponic rice cultivation device adapted to gradient salt stress. The movable component allows the cultivation chambers to be flexibly moved out of the container, solving the problem of increased plant height and light blockage inside the container during the later stages of rice growth. This ensures the rice receives sufficient light, guaranteeing experimental results. Five independent cultivation chambers allow for simultaneous experiments, ensuring a uniform environment and significantly reducing experimental errors. The device boasts a stable structure, convenient operation, and is highly practical, meeting the needs of breeding research.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A rice hydroponic cultivation device adapted to gradient salt stress, characterized in that: The device includes a housing with a door hinged to the front. Several monitoring ports are located above the door. Inside the housing, five culture chambers are arranged in a linear fashion via a movable assembly. Each of the five culture chambers is a cuboid structure with an open top. The movable assembly includes a sliding rail and a support plate. The sliding rail is symmetrically arranged on the inner wall of the housing. The support plate is slidably connected to the sliding rail via a slider at the bottom. The slider and the sliding rail are sized to match. A limit structure is fixed on the side of the sliding rail closest to the door. A liquid replenishment assembly is located above the culture chamber. ​ 2.The rice hydroponic cultivation device for adapting to gradient salt stress according to claim 1, wherein: Each of the four corners of the bottom of the chamber is equipped with a caster wheel, one of which has a self-locking mechanism. The chamber door is equipped with a handle, and the monitoring port is threaded with a sealing cap. The sealing cap is fixed with a protrusion, and the center of the monitoring port is aligned with the center of the corresponding culture chamber. 3.The rice hydroponic cultivation device for adapting to gradient salt stress according to claim 1, wherein: A transparent observation window and display screen are set on the back of the chamber, and the position of the transparent observation window corresponds to the position of the 5 independent sealed culture chambers. 4.The rice hydroponic cultivation device for adapting to gradient salt stress according to claim 1, wherein: Temperature and humidity sensors are installed on the inner wall of the chamber opposite the door. The number of temperature and humidity sensors corresponds to the number of culture chambers and is connected to the display screen on the outside of the chamber.

5. The device for rice hydroponic cultivation adapting to gradient salt stress according to claim 1, characterized in that: Inside each culture chamber, a culture tray is placed via a support rod. The width of the culture tray is smaller than the width of the culture chamber, the height of the culture tray is smaller than the height of the culture chamber, and the length of the culture tray is the same as the length of the culture chamber. Several culture wells are evenly distributed on the culture tray. 6.The rice hydroponic cultivation device for adapting to gradient salt stress according to claim 1, wherein: The support plate is provided with partitions at equal intervals above it. The partitions are placed between adjacent culture chambers. The support plate and the partitions form a placement groove for placing the culture chambers. The top of each partition is slidably connected to the top of the box body through ball bearings. The front of the support plate is provided with a groove, and a handle is provided inside the groove. The handle is rotatably connected to the groove through a rotating shaft.

7. The device for rice hydroponic cultivation adapting to gradient salt stress according to claim 6, characterized in that: A flow guide port is located at the center of the bottom of each culture chamber. The flow guide port is located on the side away from the door and runs through the bottom of the culture chamber and the support plate. A solenoid valve is installed on the flow guide port. 8.The rice hydroponic cultivation device of claim 6, wherein the device is characterized by: The bottom of the chamber is equipped with a leakage recovery tank, located directly below the culture chamber and the support plate. A drain outlet is located on the right side of the leakage recovery tank, penetrating the right side wall of the chamber, and a valve is installed at the drain outlet. 9.The rice hydroponic cultivation device of claim 1, wherein: The fluid replenishment assembly includes a main reservoir, branch infusion tubing, and flow control valves. The main reservoir consists of five independently configured reservoirs, corresponding to the number of culture chambers. The main reservoirs are fixedly installed on the top of the enclosure. The branch infusion tubing is made of silicone tubing. One end of each of the five branch infusion tubing is connected to the bottom outlet of the main reservoir, and the other end extends through the top of the enclosure to the upper part of the corresponding culture chamber, located between the culture chamber and the culture tray. The outlet of the infusion tubing is kept at a certain distance from the bottom of the culture chamber and faces the inner wall of the culture chamber. Flow control valves are installed on each branch infusion tubing. 10.The rice hydroponic cultivation device of claim 1, wherein: The chamber is equipped with supplemental lights fixedly mounted on a bracket. The number of supplemental lights corresponds to the number of culture chambers, with each supplemental light positioned above the culture chamber and its luminescent surface facing the culture chamber.

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