A rice field low temperature stress device for low temperature tolerance research of rice

Abstract

The application discloses a rice field low-temperature stress device for low-temperature cold resistance research of rice, and relates to the technical field of rice cultivation.The device comprises a water cooling machine, a cold water distribution tank installed at one end of a rice field, a cold water return tank installed at the other end of the rice field, and a cold mist cooling device arranged on the rice field; a breathable anti-seepage sand layer is arranged below the soil layer in the rice field; the water cooling machine is installed at one side of the rice field; the water inlet end of the water cooling machine takes water from the cold water return tank through a first pipeline; and the water outlet end of the water cooling machine supplies water to the cold water distribution tank through a second pipeline.The cooling cycle formed by the water cooling machine and the cold and hot water tanks realizes stable low-temperature control of water in the rice field; in combination with the cold mist cooling device, the whole rice field is uniformly cooled, and the local temperature difference is avoided from being too large; meanwhile, the breathable anti-seepage sand layer maintains the soil environment, and the pipeline heat preservation layer reduces temperature loss.

Description

Technical Field

[0001] This invention belongs to the field of rice cultivation technology, and in particular relates to a low-temperature stress device for rice fields used in research on low-temperature cold tolerance. Background Technology

[0002] As one of the world's most important food crops, rice's yield and quality are directly affected by environmental temperature. Especially under low-temperature stress, rice growth and development are severely impacted, leading to reduced yields or even crop failure. Therefore, improving the cold tolerance of rice has become one of the important directions in current rice breeding work.

[0003] However, under natural conditions, the occurrence of low-temperature stress is uncertain and uncontrollable, which poses a great challenge to the study of rice cold tolerance. To simulate low-temperature stress environments in the laboratory, researchers typically use artificial climate chambers or cryogenic incubators. However, these devices often only allow for low-temperature treatment of single rice plants or a small number of rice samples, failing to accurately reflect the overall low-temperature stress conditions in the paddy field.

[0004] In addition, most existing low-temperature stress devices for paddy fields suffer from problems such as low cooling efficiency, uneven cooling, and serious water waste. For example, some devices achieve cooling by directly injecting cold water into the paddy field, but this method can easily lead to excessively low local temperatures, which can adversely affect rice growth; while other devices use cold water spraying, but the spraying is uneven and consumes a lot of water, which is not conducive to long-term experiments.

[0005] Therefore, developing a paddy field low-temperature stress device capable of precise low-temperature control, uniform cooling, and high water resource utilization efficiency in a field environment is of great significance for in-depth research on the cold tolerance mechanism of rice and the breeding of cold-resistant rice varieties. This invention is based on this need and proposes a paddy field low-temperature stress device for research on rice cold tolerance, aiming to solve the problems existing in the prior art and provide strong support for rice cold tolerance research. Summary of the Invention

[0006] The purpose of this invention is to provide a low-temperature stress device for rice fields used in low-temperature cold tolerance research. The device uses a cooling circulation system consisting of a water chiller, a cold water distribution tank, and a return water tank, combined with a cold mist cooling device, to achieve precise low-temperature control and uniform cooling of the entire rice field.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a low-temperature stress device for rice paddy used in low-temperature cold tolerance research. It includes a water chiller, a cold water distribution tank installed at one end of the paddy field, a cold water return tank installed at the other end of the paddy field, and a cold mist cooling device arranged on the paddy field. A breathable, impermeable sand layer is provided beneath the soil layer in the paddy field. The water chiller is installed on one side of the paddy field. The water inlet of the water chiller draws water from the cold water return tank through a first pipe. The water outlet of the water chiller supplies water to the cold water distribution tank through a second pipe. The cold mist cooling device draws water from the cold water distribution tank through a third pipe. A first pit is provided at the end of the paddy field to cooperate with the cold water return tank.

[0008] As a preferred embodiment of the present invention, a second pit is provided at the end of the paddy field to cooperate with the cold water distribution tank; the upper end of the cold water distribution tank is not lower than the height of the paddy field embankment.

[0009] As a preferred embodiment of the present invention, the cold water distribution tank includes a first rectangular box with an upper opening; an inverted L-shaped output guide pipe is fixedly connected to the side of the first rectangular box relative to the paddy field, and the connection between the inverted L-shaped output guide pipe and the first rectangular box is higher than the highest limit of the rice cultivation water layer in the paddy field; the lower end of the inverted L-shaped output guide pipe is placed within the rice cultivation water layer range in the paddy field, and an L-shaped guide trough plate inclined upward is fixed to the lower end of the inverted L-shaped output guide pipe.

[0010] As a preferred embodiment of the present invention, the cold water return tank includes a second rectangular box with an upper opening; a rectangular trough is fixed to the side of the second rectangular box relative to the paddy field; a water passage is opened between the rectangular trough and the second rectangular box; an annular weir plate is slidably fitted onto the inner wall of the rectangular trough; four internally threaded perforated plates are fixed to the inner wall of the annular weir plate; a lead screw is threaded onto the internally threaded perforated plates, and the lower end of the lead screw abuts against the bottom surface of the rectangular trough; when the upper end of the annular weir plate falls to be flush with the upper end of the rectangular trough, the lower end of the annular weir plate is higher than the water passage; filter cotton is installed inside the rectangular trough.

[0011] As a preferred embodiment of the present invention, a filter grid is fixed at the upper end of the rectangular groove.

[0012] As a preferred embodiment of the present invention, the inclination angle of the horizontal plane of the L-shaped guide channel plate is between 15° and 30°, and the upper end of the L-shaped guide channel plate does not exceed the range of the rice cultivation water layer in the paddy field.

[0013] As a preferred embodiment of the present invention, the cold fog cooling device includes a booster pump, ground-mounted atomizing nozzles, and a main water supply pipe; the inlet of the booster pump is connected to the third pipe; the main water supply pipe is connected to the outlet of the booster pump; the ground-mounted atomizing nozzles are evenly distributed and installed in the paddy field; the ground-mounted atomizing nozzles are connected to the main water supply pipe through branch water supply pipes.

[0014] As a preferred embodiment of the present invention, the first pipe, the second pipe and the third pipe are all provided with an insulation layer.

[0015] As a preferred embodiment of the present invention, the distance between the breathable and impermeable sand layer and the water surface in the paddy field is between 60 cm and 1 meter; the thickness of the breathable and impermeable sand layer is between 20 cm and 50 cm.

[0016] The present invention has the following beneficial effects: 1. This invention achieves precise control of water temperature in paddy fields by combining a water chiller, a cold water distribution tank, and a cold water return tank. It can simulate different low-temperature stress environments and provide reliable experimental conditions for studying the cold resistance of rice.

[0017] 2. The device of the present invention is designed with a closed-loop cooling system, which ensures continuous circulation and stable supply of cold water, improves cooling efficiency, and reduces water waste.

[0018] 3. This invention utilizes a cold mist cooling device that uses cold water as a source for pressurized atomization, which can uniformly and quickly reduce the temperature in the paddy field, avoiding the impact of excessively low or high local temperatures on the experimental results.

[0019] 4. The breathable and impermeable sand layer set below the soil layer in the paddy field in this invention not only ensures the permeability of the soil, but also effectively prevents water infiltration, which is conducive to maintaining the stability of the water level in the paddy field and provides a good soil environment for rice growth.

[0020] 5. Each component in the device of the present invention, such as the water chiller, the cold water distribution tank, the cold water return tank, and the cold mist cooling equipment, can be adjusted independently. Researchers can flexibly adjust each parameter according to experimental needs to simulate various low-temperature stress conditions.

[0021] 6. The filter cotton and annular weir plate structure designed in the cold water return tank of this invention effectively filter impurities in the return water, and the water level can be controlled by adjusting the height of the annular weir plate, ensuring the quality of the return water and the stable operation of the system.

[0022] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of a low-temperature stress device for rice fields used in low-temperature cold resistance research according to the present invention.

[0025] Figure 2 for Figure 1 A cross-sectional schematic diagram.

[0026] Figure 3 This is a schematic diagram of the structure of a paddy field sand table model.

[0027] Figure 4 This is a schematic diagram of the cold water distribution tank.

[0028] Figure 5 This is a schematic diagram of the cold water return tank.

[0029] The attached diagram lists the components represented by each number as follows: 1-Water chiller, 2-Cold water distribution tank, 3-Cold water return tank, 4-Permeable and seepage-proof sand layer, 5-Filter cotton, 6-Booster pump, 7-Ground-inserted atomizing nozzle, 8-Main water supply pipe, 9-Branch water supply pipe, 11-First pit, 12-Second pit, 21-First rectangular box, 22-Inverted L-shaped output guide pipe, 23-L-shaped guide trough plate, 31-Second rectangular box, 32-Rectangular trough, 33-Water passage, 34-Annular weir plate, 35-Internal threaded perforated plate, 36-Screw rod, 37-Filter grid. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Specific Implementation Example 1: Please refer to... Figure 1-5 As shown, this invention is a low-temperature stress device for rice paddies used in research on low-temperature tolerance. This device aims to precisely control the low temperature of the entire rice paddy in a field environment to assist in studying the cold tolerance of transgenic or hybrid rice seedlings. The specific structure and working principle are as follows: Water chiller 1: As the core component of the cooling system, water chiller 1 is installed on one side of the paddy field and is responsible for cooling the water taken from the cold water return tank 3.

[0032] Cold water distribution tank 2 and cold water return tank 3 are installed at opposite ends of the paddy field. Cold water distribution tank 2 receives and distributes water cooled by water chiller 1, while cold water return tank 3 collects used water from the paddy field and returns it to water chiller 1 for recirculation. A first pit 11 is provided at the end of the paddy field to cooperate with cold water return tank 3, and a second pit 12 is added to cooperate with cold water distribution tank 2 to ensure stable installation of the tanks. The upper part of cold water distribution tank 2 is not lower than the height of the paddy field dike to prevent water overflow.

[0033] The cooling system includes a booster pump 6, ground-mounted atomizing nozzles 7, and a main water supply pipe 8. The booster pump 6 is connected to a cold water distribution tank 2 via a third pipe, and its output is connected to the main water supply pipe 8. Ground-mounted atomizing nozzles 7 are evenly distributed throughout the paddy field and connected to the main water supply pipe 8 via branch water supply pipes 9, enabling pressurized atomization using cold water as a source to rapidly cool the rice seedlings throughout the paddy field.

[0034] Working principle: The water chiller 1 draws water from the cold water return tank 3 through the first pipe, performs cooling treatment, and then transports the cold water to the cold water distribution tank 2 through the second pipe.

[0035] The cold water distribution tank 2 releases cold water evenly and slowly into the rice cultivation water layer in the paddy field through its unique inverted L-shaped output guide pipe 22 and L-shaped guide trough plate 23, avoiding impact on the rice seedlings.

[0036] After use, the water in the paddy field is collected through a cold water return tank 3 at the other end of the paddy field. The cold water return tank 3 is designed with a rectangular trough 32, an annular weir plate 34, and filter cotton 5, which effectively filters impurities and regulates the water level to ensure the quality of the returned water. The filtered water flows back to the water chiller 1 through the first pipe, forming a closed-loop cooling system.

[0037] When rapid cooling is required, the cold mist cooling equipment is activated. The booster pump 6 pressurizes the cold water in the cold water distribution tank 2 and delivers it to the main water supply pipe 8, which then sprays it evenly over the paddy field through the ground-mounted atomizing nozzles 7, forming a cold mist that quickly lowers the temperature inside the paddy field.

[0038] Auxiliary structure: Breathable and seepage-proof sand layer 4: Located below the soil layer in the paddy field, at a distance of 60 cm to 1 meter from the water surface, with a thickness of 20 cm to 50 cm. This breathable and seepage-proof sand layer is a breathable seepage-proof material developed using desert aeolian sand as raw material, based on the principle of "enhancing the surface tension of water." This sand layer ensures the breathability of the paddy field soil while effectively preventing water infiltration, maintaining a stable water level in the paddy field. As an insulation layer, the sand layer reduces direct heat conduction between the soil and the deeper earth layers.

[0039] Pipe insulation layer: The first, second and third pipes are all equipped with insulation layers to reduce the temperature loss of cold water during transportation and ensure the cooling effect.

[0040] In practical applications, this device can be widely used in the field of rice cold tolerance research. Researchers can adjust the cooling temperature of the water chiller 1 and the running time of the cold mist cooling equipment according to experimental needs, simulate different low-temperature stress conditions, observe and record the growth response and cold tolerance changes of transgenic or hybrid seedlings, and provide scientific basis for rice breeding work.

[0041] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0042] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A paddy field low-temperature stress device for use in rice low-temperature cold tolerance research, characterized in that: It includes a water chiller (1), a cold water distribution tank (2) installed at one end of the paddy field, a cold water return tank (3) installed at the other end of the paddy field, and a cold mist cooling device arranged on the paddy field; A breathable and impermeable sand layer (4) is set below the soil layer in the paddy field. The water chiller (1) is installed on one side of the paddy field; the water inlet of the water chiller (1) draws water from the cold water return tank (3) through the first pipe; the water outlet of the water chiller (1) supplies water to the cold water distribution tank (2) through the second pipe; the cold mist cooling device draws water from the cold water distribution tank (2) through the third pipe. The end of the paddy field is provided with a first pit (11) that cooperates with the cold water return tank (3).

2. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The end of the paddy field is also provided with a second pit (12) that cooperates with the cold water distribution tank (2); the upper end of the cold water distribution tank (2) is not lower than the height of the paddy field embankment.

3. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The cold water distribution tank (2) includes a first rectangular box (21) with an upper opening; the first rectangular box (21) is fixedly connected to an inverted L-shaped output guide pipe (22) on the side opposite to the paddy field, and the connection between the inverted L-shaped output guide pipe (22) and the first rectangular box (21) is higher than the highest limit of the rice cultivation water layer in the paddy field; the lower end of the inverted L-shaped output guide pipe (22) is placed within the rice cultivation water layer in the paddy field, and the lower end of the inverted L-shaped output guide pipe (22) is fixed with an L-shaped guide trough plate (23) that is inclined upward.

4. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The cold water return tank (3) includes a second rectangular box (31) with an upper opening; a rectangular trough (32) is fixed to the side of the second rectangular box (31) relative to the paddy field; a water passage (33) is opened between the rectangular trough (32) and the second rectangular box (31); an annular weir plate (34) is slidably fitted on the inner wall of the rectangular trough (32); four internally threaded hole plates (35) are fixed on the inner wall of the annular weir plate (34); the internally threaded hole plates (35) are threadedly connected to a screw (36), and the lower end of the screw (36) abuts against the inner bottom surface of the rectangular trough (32); when the upper end of the annular weir plate (34) falls to be flush with the upper end of the rectangular trough (32), the lower end of the annular weir plate (34) is higher than the water passage (33); a filter cotton (5) is installed inside the rectangular trough (32).

5. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 4, characterized in that, The upper end of the rectangular groove (32) is fixed with a filter grid (37).

6. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 3, characterized in that, The horizontal inclination angle of the L-shaped guide trough plate (23) is between 15° and 30°, and the upper end of the L-shaped guide trough plate (23) does not exceed the range of the rice cultivation water layer in the paddy field.

7. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The cooling fog device includes a booster pump (6), a ground-mounted atomizing nozzle (7), and a main water supply pipe (8); the inlet of the booster pump (6) is connected to the third pipe; the main water supply pipe (8) is connected to the outlet of the booster pump (6); the ground-mounted atomizing nozzles (7) are evenly distributed and installed in the paddy field; the ground-mounted atomizing nozzles (7) are connected to the main water supply pipe (8) through branch water supply pipes (9).

8. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The first pipe, the second pipe, and the third pipe are all provided with an insulation layer.

9. The paddy field low-temperature stress device for rice low-temperature cold tolerance research according to claim 1, characterized in that, The distance between the breathable and impermeable sand layer (4) and the water surface in the paddy field is between 60 cm and 1 meter; the thickness of the breathable and impermeable sand layer (4) is between 20 cm and 50 cm.

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