Device and method for detecting drought resistance of wheat seeds

Abstract

The invention discloses a device for detecting drought resistance of wheat seeds. The device comprises an isolation hood, a bottom bin and a conveying pipe group which are distributed up and down, the isolation cover is of a transparent structure and is detachably installed on the bottom bin. The conveying pipe group is mounted below the bottom bin, the top of the conveying pipe group penetrates through a bottom plate of the bottom bin and extends into a culture space formed by the isolation cover and the bottom bin, and soil is stored in the culture space; the multiple culture spaces, the water tanks and the heating boxes are distributed on the same frame, hot air or irrigation water can be pumped and conveyed to the corresponding culture spaces through work of the liquid pumps and the draught fans, then drought conditions are created in the corresponding culture spaces, then wheat is planted in drought soil, the drought resistance is judged by calculating the germination rate of seeds, and therefore the drought resistance of the wheat is judged. According to the mode, the current situation that detection is affected by the problems of poor stress environment stability, insufficient key parameter regulation and control precision, low detection efficiency, poor result repeatability and the like is changed.

Description

Technical Field

[0001] This invention relates to the field of wheat drought resistance testing, specifically to an apparatus and method for testing the drought resistance of wheat seeds. Background Technology

[0002] Wheat is one of my country's major food crops, and drought is a significant abiotic stress factor affecting wheat yield and quality. In wheat breeding and production practices, accurately evaluating the drought resistance of wheat seeds and selecting drought-resistant varieties is crucial for ensuring stable wheat production in arid regions.

[0003] Currently, the core methods for simulating drought environments in wheat seed drought resistance testing technology are mainly divided into two categories: PEG (polyethylene glycol) solution simulation and field water control simulation. However, both of these mainstream methods and their supporting devices have significant technical defects, making it difficult to meet the actual needs of accurate testing. Among them, laboratory-level simulation testing devices are generally simple in structure, often using ordinary incubators with artificially prepared stress solutions to complete drought simulation. These devices lack a systematic parameter control mechanism and cannot accurately control the core key parameters of drought simulation: on the one hand, for the PEG solution simulation system, it is difficult to maintain a constant osmotic pressure. The concentration error is large during artificial preparation, and factors such as solution evaporation and seed absorption during cultivation can easily lead to dynamic fluctuations in osmotic pressure, making it impossible to construct a standardized drought stress environment; on the other hand, the device lacks precision in controlling the temperature and humidity of the cultivation environment. The temperature fluctuation range often exceeds ±2℃, and the humidity deviation can reach more than 10%. Interference from non-drought stress factors further exacerbates the instability of the test results.

[0004] At the same time, although the field water control simulation method can closely approximate the natural growth environment to a certain extent, it is significantly affected by natural meteorological conditions. Uncontrollable factors such as natural rainfall and sudden changes in diurnal temperature range can disrupt the preset drought gradient, resulting in a lack of comparability of test results from different batches and regions. Moreover, the field testing cycle is long throughout the entire growth period, making it impossible to quickly complete the drought resistance screening of batches of seeds and making it difficult to meet the technical requirements for efficient screening in wheat breeding.

[0005] In summary, existing detection methods and devices suffer from poor stability under stress environments, insufficient precision in controlling key parameters, low detection efficiency, and poor repeatability of results, which severely restrict the accuracy and reliability of evaluating the drought resistance of wheat seeds and fail to provide precise technical support for wheat drought resistance breeding and production practices. Summary of the Invention

[0006] The purpose of this invention is to provide an apparatus and method for detecting the drought resistance of wheat seeds, aiming to improve the poor accuracy and reliability of existing wheat drought resistance detection methods and apparatus for evaluating drought resistance.

[0007] The present invention is implemented as follows: a device for detecting the drought resistance of wheat seeds, comprising... The system consists of an isolation hood, a bottom chamber, and a delivery pipe assembly arranged vertically. The isolation hood is transparent and can be detachably installed on the bottom chamber. The delivery pipe assembly is installed below the bottom chamber, with its top extending through the bottom plate of the bottom chamber into the culture space formed by the isolation hood and the bottom chamber, where soil is stored. Multiple sets of isolation hoods, bottom chambers, and delivery pipe assemblies form multiple vertically distributed culture spaces. The water tanks and heating tanks are arranged adjacently. A fan and a liquid pump are installed on the top of the heating tank. A water pipe connected to the input end of the liquid pump extends into the water tank. The input end of the fan is connected to the output hole on the top of the heating tank. The output ends of the fan and the liquid pump are connected to the input end of the delivery pipe assembly through a solenoid valve. The frame has multiple storage spaces arranged vertically. The water tank and heating tank are located in the bottom storage space of the frame, and the multiple culture spaces are located in the other storage spaces of the frame.

[0008] Preferably, the delivery pipe assembly includes a pipe assembly, a blocking mechanism, and multiple output ends. One end of the pipe assembly is connected to the output ends of the blower and the liquid pump via a tee pipe. The blocking mechanism is installed at the other end of the pipe assembly, and the multiple output ends are evenly distributed on the pipe assembly.

[0009] Preferably, the output end includes a protective mesh cover and an end tube. Multiple downwardly inclined channels are evenly distributed on the side wall of the end tube, and the protective mesh cover is fitted onto the end tube. The pipe assembly includes a pipe body and an internally threaded pipe that is connected to and installed on the pipe body. An externally threaded pipe that is connected to and installed below the end tube is inserted into the internally threaded pipe.

[0010] Preferably, multiple through holes are evenly distributed on the bottom plate of the hopper, with the end pipe facing the through hole and the external threaded pipe passing through the through hole.

[0011] Preferably, the delivery pipe assembly also includes a sensor assembly, which includes a support, a temperature sensor and a humidity sensor installed at both ends of the top of the support, a bottom plate distributed at the bottom of the support, and soil covering the support, while the detection ends of the temperature sensor and the humidity sensor are submerged in the soil.

[0012] Preferably, the blocking mechanism includes a driving plate, a telescopic cylinder located on the same side of the driving plate, and multiple sealing plugs. Each sealing plug has a sleeve frame installed on its outer side. The length of the sleeve frame is greater than the length of the sealing plug. The end rods installed at the ends of the sleeve frame and the sealing plugs pass through the driving plate. The telescopic end of the telescopic cylinder is connected to the driving plate. The pipe body is in an inclined state, and one end of the pipe body opening is in a low position. The sealing plug, which is configured as a frustum structure, extends into the opening of the pipe body. The sleeve frame is sleeved on the outer side of the pipe body, and the telescopic cylinder is installed between two adjacent pipe bodies through a support frame.

[0013] Preferably, the heating chamber includes an outer shell, an inner shell, and multiple heating wires; the opening directions of the inner shell and the outer shell are opposite, and the opening end of the inner shell contacts the bottom plate of the outer shell, while an air inlet is provided on the side wall of the opening end of the inner shell; multiple partitions are arranged vertically on the inner side of the inner shell, and the multiple partitions divide the inner shell to form an S-shaped gas channel; the multiple heating wires and the multiple partitions are arranged alternately, and the gas flowing into the S-shaped gas channel contacts the multiple heating wires in sequence.

[0014] Preferably, the frame includes a base frame and four vertical pipes distributed at the corners of the base frame; stepped grooves are provided on both short sides of the base frame, and baffles are provided in the middle of both long sides of the base frame; the water tank and heating box are supported on the base frame and located in the space formed by the baffles and stepped grooves; a support frame is provided below the base compartment, and connecting holes are provided on the edge of the support frame; connecting pipes are provided through the connecting holes; side pipes are fixedly provided on the vertical pipes; the ends of the connecting pipes are connected to the vertical pipes and inserted into the side pipes by bolts.

[0015] Preferably, a rectangular clamping plate is provided at the top of the bottom compartment, and a rectangular clamping groove is provided at the bottom of the isolation cover, with the clamping plate extending into the groove; a braking mechanism is provided above the isolation cover, the braking mechanism including a lower pressure plate, a pipe, a clamp, and a threaded post, the pipe being installed on the side of the lower pressure plate, the threaded post being fixed below the lower pressure plate, and the threaded post penetrating the end plate of the clamp, while a nut is fitted at the lower end of the threaded post; the lower pressure plate is fitted against the isolation cover, and the pipe and clamp are fitted onto the vertical pipe.

[0016] A method for detecting drought resistance in wheat seeds, including Step 1: Select plump, uniformly sized wheat seeds free from damage and pests, soak them in 75% ethanol solution for 30 seconds for disinfection, then rinse them 4 times with sterile distilled water, place them on sterile filter paper to absorb surface moisture for later use; prepare standardized soil substrate, sterilize it at 121℃ for 20 minutes, cool it to room temperature, and fill it into the soil layer of each cultivation space with a filling thickness of 8-10cm; Step 2: Input preset parameters through the control system to set multiple different moisture content gradients, namely 10%-15% (severe drought), 18%-23% (moderate drought), and 25%-30% (mild drought), while setting 35%-40% (normal moisture, control group); Step 3: Evenly sow 20-25 pretreated wheat seeds on the surface of the soil in each cultivation space and cover them with 1cm of sterilized soil substrate; the control system receives information from the sensor group and compares it with the preset threshold, and then makes a decision on whether to start the heating wire, fan and liquid pump to deliver hot air or irrigation water to the delivery pipe group, so as to heat the soil by hot air to reduce its humidity, or to enter the soil by irrigation water to increase its humidity. Step 4: After the cultivation cycle is completed, calculate the seed germination rate of each test unit to determine the drought resistance.

[0017] Compared with the prior art, the beneficial effects of the present invention are: This invention features multiple cultivation spaces, water tanks, and heating chambers distributed on the same frame. Hot air or irrigation water can be pumped to the corresponding cultivation spaces via liquid pumps and fans, thereby creating arid conditions within the cultivation spaces. Wheat is then planted in arid soil, and drought resistance is determined by calculating the seed germination rate. This method changes the current situation where detection is affected by problems such as poor stability of the stress environment, insufficient precision in the control of key parameters, low detection efficiency, and poor repeatability of results.

[0018] The present invention sets up a single set of conveying pipes for both irrigation water and hot air delivery, which reduces the cost of the device. In addition, the conveying pipes include multiple output ends that are evenly distributed in the soil, which can distribute the hot air or irrigation water more evenly in the soil and avoid some areas becoming too dry. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the framework of the present invention; Figure 3 This is a schematic diagram of the structure of the water tank and heating tank of the present invention; Figure 4 This is a first structural schematic diagram of the heating box of the present invention; Figure 5 This is a schematic diagram of the second structure of the heating box of the present invention; Figure 6 This is a schematic diagram of the structure of the isolation cover, braking mechanism, bottom chamber, and conveying pipe assembly of the present invention; Figure 7 This is a partial structural schematic diagram of the isolation cover of the present invention; Figure 8 This is a schematic diagram of the structure of the isolation cover of the present invention; Figure 9 This is a schematic diagram of the braking mechanism of the present invention; Figure 10 This is a schematic diagram of the structure of the bottom compartment of the present invention; Figure 11 This is a first structural schematic diagram of the conveying pipe assembly of the present invention; Figure 12 This is a schematic diagram of the second structure of the delivery pipe assembly of the present invention; Figure 13 This is a schematic diagram of the pipe assembly of the present invention; Figure 14 This is a schematic diagram of the output terminal of the present invention; Figure 15This is a schematic diagram of the blocking mechanism of the present invention; Figure 16 This is a schematic diagram of the sensor array of the present invention.

[0020] In the diagram: 1. Frame; 11. Control system; 12. Vertical pipe; 13. Side pipe; 14. Bottom frame; 15. Stepped groove; 16. Baffle; 2. Water tank; 21. Liquid pump; 22. Water pipe; 3. Heating box; 31. Fan; 32. Outer shell; 33. Inner shell; 34. Air inlet; 35. Heating wire; 36. Partition; 4. Isolation cover; 41. Wire hole; 42. Top pipe; 43. Bottom cap; 44. Blocking column; 45. Guide rod; 46. Slot; 5. Braking mechanism; 51. Lower pressure plate; 52. Flanged pipe; 53. Clamp; 54. Threaded column; 55. End plate; 6. Bottom compartment; 1. Connecting hole; 62. Card plate; 63. Through hole; 64. Connecting pipe; 65. Support frame; 7. Conveying pipe assembly; 71. Pipe assembly; 711. Pipe body; 712. Internally threaded pipe; 72. Sensor assembly; 721. Temperature sensor; 722. Humidity sensor; 723. Bracket; 73. Output end; 731. Protective mesh cover; 732. End pipe; 733. Channel; 734. Externally threaded pipe; 74. Blocking mechanism; 741. Telescopic cylinder; 742. Sleeve frame; 743. Sealing plug; 744. End rod; 745. Driving plate; 746. Support frame; 75. T-shaped pipe. Detailed Implementation

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details: Example 1

[0023] like Figure 1 As shown, in order to improve the accuracy and reliability of wheat drought resistance testing, this embodiment provides a new device for testing wheat drought resistance. The device includes a frame 1, a water tank 2, a heating box 3, an upper and lower distributed isolation cover 4, a bottom chamber 6, and a conveying pipe assembly 7, etc.

[0024] like Figure 6As shown, the isolation cover 4 is a transparent structure and is detachably installed on the bottom chamber 6. The delivery pipe assembly 7 is installed below the bottom chamber 6, and the top of the delivery pipe assembly 7 extends through the bottom plate of the bottom chamber 6 into the cultivation space formed by the isolation cover 4 and the bottom chamber 6, where soil is stored. Multiple sets of isolation covers 4, bottom chambers 6, and delivery pipe assemblies 7 form multiple vertically distributed cultivation spaces, providing convenience for setting up multiple planting environments with different drought levels as needed, thereby allowing wheat seeds to be planted in different drought-prone soils, providing support for the detection of wheat drought tolerance.

[0025] like Figure 3 As shown, a fan 31 and a liquid pump 21 are installed on the top of the heating box 3. A water pipe 22 connected to the input end of the liquid pump 21 extends into the water tank 2. The input end of the fan 31 is connected to the output hole on the top of the heating box 3. In addition, the output ends of the fan 31 and the liquid pump 21 are connected to the input end of the delivery pipe group 7 through a solenoid valve. Therefore, by operating the fan 31 and the liquid pump 21, hot air or irrigation water can be delivered to each cultivation space. This allows for the selection of injecting hot air into the soil to reduce its humidity or injecting irrigation water to increase its humidity according to changes in soil moisture, thereby providing a more stable environment for wheat cultivation.

[0026] like Figure 1 As shown, multiple storage spaces are set vertically in the frame 1. The water tank 2 and the heating box 3 are located in the bottom storage space of the frame 1, and multiple culture spaces are located in other storage spaces of the frame 1.

[0027] like Figure 11 , Figure 12 As shown, in order to distribute hot air or irrigation water more evenly in the soil and to remove accumulated soil, the delivery pipe assembly 7 includes a pipe assembly 71, a blocking mechanism 74, and multiple output ends 73. The pipe assembly 71 is inclined, and one end of the pipe assembly 71 is connected to the output ends of the blower 31 and the liquid pump 21 via a T-junction 75. The blocking mechanism 74 is installed at the open end of the pipe assembly 71. This solenoid valve allows selection of the pipe connected to the blower 31 or the liquid pump 21 to be open, facilitating the delivery of hot air or irrigation water to the soil. This configuration reduces the cost of hot air drying and irrigation. The blocking mechanism 74 controls whether the open end of the pipe assembly 71 is open. Therefore, when it is necessary to remove accumulated soil particles, the opening of the pipe assembly 71 is open, allowing soil particles to detach from the pipe assembly 71 under the action of gravity, wind, or liquid thrust. Multiple output ends 73 are evenly installed on the pipe assembly 71, and the output ends 73 are located in the cultivation space and submerged in the soil. Therefore, the hot air or irrigation water can be distributed relatively evenly under the action of the output ends 73.

[0028] like Figure 14As shown, specifically, the output end 73 includes a protective mesh cover 731 and an end tube 732. Multiple downward-sloping channels 733 are evenly distributed on the side wall of the end tube 732. The protective mesh cover 731 is fitted onto the end tube 732. This arrangement reduces the possibility of soil particles entering the end tube 732.

[0029] like Figure 13 , Figure 14 As shown, the pipe assembly 71 includes a pipe body 711 and an internally threaded pipe 712 that is connected to the pipe body 711. An externally threaded pipe 734 that is connected to the end pipe 732 is inserted into the internally threaded pipe 712, thereby achieving a stable and detachable connection between the output end 73 and the pipe body 711.

[0030] like Figure 10 , Figure 14 As shown, multiple through holes 63 are evenly distributed on the bottom plate of the bottom compartment 6, the end tube 732 is positioned directly opposite the through hole 63, and the external threaded tube 734 is positioned through the through hole 63.

[0031] like Figure 11 , Figure 12 , Figure 16 As shown, in order to adjust the humidity according to the drought level of the soil, the delivery pipe assembly 7 also includes a sensor assembly 72. The sensor assembly 72 includes a bracket 723, a temperature sensor 721 and a humidity sensor 722 installed at both ends of the top of the bracket 723. The bottom plate of the bottom chamber 6 of the bracket 723 is distributed, and the soil covers the bracket 723. At the same time, the detection ends of the temperature sensor 721 and the humidity sensor 722 are submerged in the soil. In addition, the data lines of the temperature sensor 721 and the humidity sensor 722 pass through the wire hole 41 of the isolation cover 4 and are connected to the control system 11. The junction of the wire hole 41 and the data line is sealed.

[0032] like Figure 15As shown, to achieve soil particle removal, the blocking mechanism 74 includes a drive plate 745, a telescopic cylinder 741 located on the same side of the drive plate 745, and multiple sealing plugs 743. Each sealing plug 743 has a sleeve frame 742 mounted on its outer side. The length of the sleeve frame 742 is greater than the length of the sealing plug 743. End rods 744 mounted on the ends of the sleeve frame 742 and the sealing plug 743 pass through the drive plate 745. The telescopic end of the telescopic cylinder 741 is connected to the drive plate 745. The pipe body 711 is in an inclined state, with one open end of the pipe body 711 at a lower position. The sealing plug 743, configured as a frustum, extends into the opening of the pipe body 711. The sleeve frame 742 is fitted onto the outer side of the pipe body 711, and the telescopic cylinder 741 is mounted between two adjacent pipe bodies 711 via a support frame 746. The aforementioned telescopic cylinder 741 can be configured as an electric cylinder. In this configuration, the telescopic cylinder 741 controls the movement of the plate 745, forcing multiple sealing plugs 743 and the sleeve frame 742 to move synchronously. This causes the sealing plugs 743 to detach from the pipe body 711, while the sleeve frame 742 remains in contact with the pipe body 711. At this point, the pipe body 711 can smoothly remove soil particles. When it is necessary to seal the pipe body 711, the telescopic cylinder 741 resets, causing the sealing plugs 743 to block the pipe body 711.

[0033] like Figure 4 , Figure 5 As shown, in order to inject hot air into the culture space, the heating chamber 3 includes an outer shell 32, an inner shell 33, and multiple heating wires 35. The opening directions of the inner shell 33 and the outer shell 32 are opposite, and the opening end of the inner shell 33 contacts the bottom plate of the outer shell 32. An air inlet 34 is provided on the side wall of the opening end of the inner shell 33. Multiple partitions 36 are arranged vertically and vertically on the inner side of the inner shell 33, forming an S-shaped gas channel. The multiple heating wires 35 are alternately distributed with the multiple partitions 36, and the heating wires 35 are connected to the control system 11. When hot air needs to be injected into the culture space, the fan 31 and the heating wires 35 operate simultaneously. Under the suction of the fan 31, external gas enters the gap between the outer shell 32 and the inner shell 33, and enters the inner shell 33 through the air inlet 34. Then, the gas flowing into the S-shaped gas channel contacts the multiple heating wires 35 in sequence, achieving gas heating. The heated gas enters the blower 31 and flows along the pipe into the corresponding culture space. When the gas enters the gap between the outer shell 32 and the inner shell 33, it contacts the side wall of the inner shell 33, preheating the gas and reducing heat loss. A filter screen can also be installed at the top of the gap between the outer shell 32 and the inner shell 33 to filter impurities.

[0034] like Figure 7As shown, when hot air is injected into the culture space, to prevent high pressure inside the culture space, a blocking column 44 is installed at the top pipe 42 of the isolation cover 4. A guide rod 45 is fixedly installed above the blocking column 44. The guide rod 45 passes through the frame installed above the bottom cap 43, and the bottom cap 43 is threaded onto the top pipe 42. Therefore, when there is a large amount of gas in the culture space, the gas lifts the blocking column 44 to overcome its gravity, causing the blocking column 44 to detach from the top pipe 42, thus achieving depressurization of the culture space. When the pressure inside the culture space is normal, the blocking column 44 descends under the action of gravity to block the top pipe 42.

[0035] like Figure 1 , Figure 2 , Figure 10 As shown, to achieve a stable connection between the bottom chamber 6, water tank 2, and heating box 3 and the frame 1, the frame 1 includes a bottom frame 14 and four vertical pipes 12 distributed at the corners of the bottom frame 14. Stepped grooves 15 are provided on both short sides of the bottom frame 14, and baffles 16 are provided in the middle of both long sides of the bottom frame 14. The water tank 2 and heating box 3 are supported on the bottom frame 14 and located within the space formed by the baffles 16 and the stepped grooves 15. A support frame 65 is provided below the bottom chamber 6, and connecting holes 61 are provided on the edge of the support frame 65. A connecting pipe 64 is inserted through the connecting holes 61, and a side pipe 13 is fixedly connected to the vertical pipes 12. The end of the connecting pipe 64 is bolted into the vertical pipes 12 and the side pipe 13.

[0036] like Figure 8 , Figure 9 , Figure 10 As shown, to achieve a detachable connection between the isolation cover 4 and the base compartment 6, a rectangular clamping plate 62 is provided on the top of the base compartment 6, and a rectangular clamping groove 46 is provided on the bottom of the isolation cover 4. The clamping plate 62 extends into the clamping groove 46 to restrict the relative position of the base compartment 6 and the isolation cover 4. In addition, a braking mechanism 5 is provided above the isolation cover 4. The braking mechanism 5 includes a lower pressure plate 51, a pipe 52, a clamp 53, and a threaded post 54. The pipe 52 is installed on the side of the lower pressure plate 51, and the threaded post 54 is fixed below the lower pressure plate 51. The threaded post 54 is provided through the end plate 55 of the clamp 53, and a nut is fitted at the lower end of the threaded post 54. During assembly, the sleeve 52 and clamp 53 are fitted onto the vertical pipe 12. After the isolation cover 4 is installed on the bottom chamber 6, the nut is turned to control the lower pressure plate 51 to descend, so that the lower pressure plate 51 is set to fit against the isolation cover 4. Since the clamp 53 is stationary relative to the vertical pipe 12, the lower pressure plate 51 can press down on the isolation cover 4 to restrict its position.

[0037] The aforementioned control system 11 is configured according to actual needs and existing technology, and is equipped with at least a controller, a data storage unit, a data processing unit and a wireless transmission unit; the controller is electrically connected to the liquid pump 21, the fan 31, the heating wire 35 and the sensor group 72 respectively, receives feedback signals from each sensor and monitoring component, and controls the operation of each actuator according to preset parameters. Example 2

[0038] In the case of the drought resistance device disclosed in Embodiment 1 above, this embodiment provides a method for detecting the drought resistance of wheat seeds, including... Step 1: Select plump, uniformly sized wheat seeds free from damage and pests, soak them in 75% ethanol solution for 30 seconds for disinfection, then rinse them 4 times with sterile distilled water, place them on sterile filter paper to absorb surface moisture for later use; prepare standardized soil substrate, sterilize at 121℃ for 20 minutes, cool to room temperature, and fill the soil layer of each cultivation space with a filling thickness of 8-10cm.

[0039] Step 2: Input preset parameters through the control system 11 and set multiple different moisture content gradients, namely 10%-15% (severe drought), 18%-23% (moderate drought), and 25%-30% (mild drought), while setting 35%-40% (normal moisture, control group).

[0040] Step 3: Evenly sow 20-25 pretreated wheat seeds on the surface of the soil in each cultivation space and cover with 1cm of sterilized soil substrate; the control system receives information from sensor group 72 and compares it with preset thresholds, and then determines whether to start the heating wire 35, fan 31 and liquid pump 21 to deliver hot air or irrigation water to delivery pipe group 7, thereby heating the soil with hot air to reduce its humidity, or injecting irrigation water into the soil to increase its humidity.

[0041] Step 4: After the cultivation cycle is completed, calculate the seed germination rate of each test unit to determine the drought resistance.

[0042] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for detecting the drought resistance of wheat seeds, characterized in that, include An isolation cover (4), a bottom chamber (6), and a conveying pipe assembly (7) are arranged vertically. The isolation cover (4) is a transparent structure and can be detachably installed on the bottom chamber (6). The conveying pipe assembly (7) is installed below the bottom chamber (6), and the top of the conveying pipe assembly (7) extends through the bottom plate of the bottom chamber (6) into the culture space composed of the isolation cover (4) and the bottom chamber (6), where soil is stored. Multiple sets of the isolation cover (4), bottom chamber (6), and conveying pipe assembly (7) form multiple vertically distributed culture spaces. The water tank (2) and heating tank (3) are distributed adjacently. A fan (31) and a liquid pump (21) are installed on the top of the heating tank (3). A water pipe (22) connected to the input end of the liquid pump (21) extends into the water tank (2). The input end of the fan (31) is connected to the output hole on the top of the heating tank (3). The output ends (73) of the fan (31) and the liquid pump (21) are connected to the input end of the delivery pipe group (7) through a solenoid valve. The frame (1) has multiple storage spaces in its vertical direction. The water tank (2) and the heating box (3) are located in the bottom storage space of the frame (1), and the multiple culture spaces are located in other storage spaces of the frame (1).

2. The device for detecting the drought resistance of wheat seeds according to claim 1, characterized in that, The delivery pipe assembly (7) includes a pipe assembly (71), a blocking mechanism (74), and multiple output ends (73). One end of the pipe assembly (71) is connected to the output ends (73) of the fan (31) and the liquid pump (21) through a tee pipe (75). The blocking mechanism (74) is installed at the other end of the pipe assembly (71), and the multiple output ends (73) are evenly installed on the pipe assembly (71).

3. The device for detecting the drought resistance of wheat seeds according to claim 2, characterized in that, The output end (73) includes a protective mesh cover (731) and an end tube (732). Multiple downward inclined channels (733) are evenly distributed on the side wall of the end tube (732). The protective mesh cover (731) is sleeved on the end tube (732). The pipe assembly (71) includes a pipe body (711) and an internally threaded pipe (712) that is connected to the pipe body (711). An externally threaded pipe (734) that is connected to the end tube (732) is inserted into the internally threaded pipe (712).

4. The device for detecting the drought resistance of wheat seeds according to claim 3, characterized in that, Multiple through holes (63) are evenly distributed on the bottom plate of the bottom compartment (6). The end tube (732) is positioned opposite the through hole (63), and the external threaded tube (734) is positioned through the through hole (63).

5. The device for detecting the drought resistance of wheat seeds according to claim 2, characterized in that, The delivery pipe assembly (7) also includes a sensor assembly (72), which includes a support (723), a temperature sensor (721) and a humidity sensor (722) installed at both ends of the top of the support (723). The bottom plate of the bottom compartment (6) of the support (723) is distributed, and the soil covers the support (723). At the same time, the detection ends of the temperature sensor (721) and the humidity sensor (722) are submerged in the soil.

6. The device for detecting the drought resistance of wheat seeds according to claim 3, characterized in that, The blocking mechanism (74) includes a drive plate (745), a telescopic cylinder (741) located on the same side of the drive plate (745), and a plurality of sealing plugs (743). Each sealing plug (743) has a sleeve frame (742) installed on its outer side. The length of the sleeve frame (742) is greater than the length of the sealing plug (743). The end rods (744) installed at the ends of the sleeve frame (742) and the sealing plugs (743) are arranged through the drive plate (745). The telescopic end of the telescopic cylinder (741) is connected to the drive plate (745); the tube body (711) is in an inclined state, and one end of the tube body (711) opening is in a low position; the sealing plug (743) configured as a frustum extends into the opening of the tube body (711), the sleeve frame (742) is sleeved on the outside of the tube body (711), and the telescopic cylinder (741) is installed between two adjacent tube bodies (711) through the support frame (746).

7. The device for detecting the drought resistance of wheat seeds according to claim 2, characterized in that, The heating box (3) includes an outer shell (32), an inner shell (33), and multiple heating wires (35); the opening directions of the inner shell (33) and the outer shell (32) are opposite, and the opening end of the inner shell (33) is in contact with the bottom plate of the outer shell (32). At the same time, an air inlet (34) is provided on the side wall of the opening end of the inner shell (33); multiple partitions (36) are arranged vertically on the inner side of the inner shell (33), and the multiple partitions (36) separate the inner shell (33) to form an S-shaped gas channel; the multiple heating wires (35) and the multiple partitions (36) are alternately arranged, and the gas flowing into the S-shaped gas channel contacts the multiple heating wires (35) in sequence.

8. The device for detecting the drought resistance of wheat seeds according to claim 1, characterized in that, The frame (1) includes a bottom frame (14) and four vertical tubes (12) distributed at the corners of the bottom frame (14); stepped grooves (15) are provided on both short sides of the bottom frame (14), and baffles (16) are provided in the middle of both long sides of the bottom frame (14). The water tank (2) and the heating box (3) are supported on the bottom frame (14) and located in the space formed by the baffles (16) and the stepped grooves (15); a support frame (65) is provided below the bottom compartment (6), and a connecting hole (61) is provided on the edge of the support frame (65). A connecting pipe (64) is provided through the connecting hole (61), and a side pipe (13) is fixedly provided on the vertical tube (12). The end of the connecting pipe (64) is inserted into the vertical rod and the side pipe (13) by bolt connection.

9. The device for detecting the drought resistance of wheat seeds according to claim 8, characterized in that, A rectangular clamping plate (62) is provided at the top of the bottom compartment (6), and a rectangular clamping groove (46) is provided at the bottom of the isolation cover (4). The clamping plate (62) extends into the clamping groove (46). A braking mechanism (5) is provided above the isolation cover (4). The braking mechanism (5) includes a lower pressure plate (51), a pipe (52), a clamp (53), and a threaded column (54). The pipe (52) is installed on the side of the lower pressure plate (51). The threaded column (54) is fixed below the lower pressure plate (51) and passes through the end plate (55) of the clamp (53). A nut is sleeved at the lower end of the threaded column (54). The lower pressure plate (51) is fitted to the isolation cover (4). The pipe (52) and the clamp (53) are sleeved on the vertical pipe (12).

10. A method for detecting the drought resistance of wheat seeds, applicable to any one of claims 1-9, characterized in that, include Step 1: Select plump, uniformly sized wheat seeds free from damage and pests, soak them in 75% ethanol solution for 30 seconds for disinfection, then rinse them 4 times with sterile distilled water, place them on sterile filter paper to absorb surface moisture for later use; prepare standardized soil substrate, sterilize it at 121℃ for 20 minutes, cool it to room temperature, and fill it into the soil layer of each cultivation space with a filling thickness of 8-10cm; Step 2: Input preset parameters through the control system (11) and set multiple different water content gradients, namely 10%-15% (severe drought), 18%-23% (moderate drought), and 25%-30% (mild drought), while setting 35%-40% (normal moisture, control group); Step 3: Sow 20-25 pretreated wheat seeds evenly on the surface of the soil in each cultivation space and cover with 1cm of sterilized soil substrate; the control system (11) receives information from the sensor group (72) and compares it with the preset threshold, and then makes a judgment on whether to start the heating wire (35), fan (31) and liquid pump (21) to deliver hot air or irrigation water to the delivery pipe group (7), thereby heating the soil with hot air to reduce its humidity, or injecting irrigation water into the soil to increase its humidity; Step 4: After the cultivation cycle is completed, calculate the seed germination rate of each test unit to determine the drought resistance.

Images