An apparatus for corn drought-quick test treatment

Abstract

The utility model discloses a device for corn drought test processing is arranged with the microporous ceramic sheet in the inside of water guide bottom groove (37), the pore size of this microporous ceramic sheet is 0.05mm, the water guide pipe (32) is controllable water supply pipe of medical grade silica gel material processing and preparation, and the inlet of this water guide pipe (32) is docked with the micro peristaltic pump, and the flow range of this micro peristaltic pump is 0.1-50mL / min. The utility model discloses the method that can make the water distribution uniformity reach above 92% by the inside of water guide bottom groove is arranged with the microporous ceramic sheet, supports the step by step water quantity control from drought to rehydration, and solves the problem that traditional equipment can not simulate gradient water supply.

Description

Technical Field

[0001] This utility model relates to the technical field of agricultural experimental equipment, specifically to a device for experimental treatment of corn during sudden drought. Background Technology

[0002] As a major food crop, research on the drought resistance of maize is a crucial part of ensuring food security. Sudden drought events can affect maize yields, causing a rapid decline in soil moisture (typically below 30% within 3-5 days). Current technologies for studying maize drought recovery primarily utilize two types of equipment: traditional irrigation equipment, employing field irrigation systems for rehydration; and laboratory drought control devices, such as PEG osmotic simulation drought chambers.

[0003] The original patent CN219675540U (Experimental Collector for Determining Rainwater Interception in Maize Canopy) is the basis for this improved solution. Its core components are a funnel-shaped stalk flow collection hood, a water-guiding trough for collecting stalk flow, and a water-guiding pipe. The auxiliary system consists of a rain-collecting bucket and a portable field simulated rainfall device. Its working principle is as follows:

[0004] The main function of this device is rainwater collection. The rain collection cover is fixedly installed by a clamping device, and it is essentially a passive collection device.

[0005] In practical use, the existing technology still has the following shortcomings:

[0006] 1. Limited functionality, unable to meet the demands of gradient water supply. The original device was designed for rainwater collection; its funnel-shaped stem flow rain hood passively collects rainwater and cannot actively control the water supply. The water pipes and drainage channels are designed to drain water, not to supply water in reverse. Therefore, it cannot be used to simulate gradient water supply experiments simulating gradual recovery after drought.

[0007] 2. The materials and structure are unsuitable for active water supply. The original water pipe was made of rigid PVC, which is prone to turbulence under low-pressure water supply, making it impossible to achieve precise micro-water supply. The original water channel was designed as a water collection tank, without water distribution function, and could not evenly wet the base of the stem.

[0008] 3. Lack of a monitoring system. The original device did not integrate any sensors and could not monitor the physiological state of the corn (such as stalk moisture) and soil moisture in real time, thus failing to form a closed-loop control. Utility Model Content

[0009] The purpose of this invention is to provide a device for treating sudden drought in maize, which can effectively solve the problems existing in the background art.

[0010] To address the problems existing in the background technology, it includes a rain-collecting bucket 1, an external plastic tray 2, a funnel-shaped stalk flow rain-collecting cover 3, and a portable field simulated rain device 5. Multiple corn seedlings 4 are placed below the portable field simulated rain device 5. Multiple rain-collecting buckets 1 are randomly placed among the corn seedlings 4. A funnel-shaped stalk flow rain-collecting cover 3 is installed at the bottom of each corn seedling 4. The external plastic tray 2 is placed on the ground. The funnel-shaped stalk flow rain-collecting cover 3 includes two half-covers 31, which are fitted onto the bottom of the corn seedlings 4. A water-guiding groove 37 is formed on the inner bottom of each half-cover 31, and one half-cover 31 has a surface that communicates with the water-guiding groove 37. A water guide pipe 32 extends to the inner side of the external plastic disc 2; one half-cover 31 has a base 33 fixed to both ends, and the other half-cover 31 has a base sleeve 34 fixed to both ends. A positioning rod 35 is fixed to one side of the base 33, and the end of the positioning rod 35 extends through to one side of the base sleeve 34. A clamping mechanism 36 is also provided between the base 33 and the base sleeve 34. The clamping mechanism 36 includes a rectangular seat 361 fixed to the upper and lower surfaces of the base 33. A movable rod 362 is provided through the interior of the rectangular seat 361, and an end rod 363 is rotatably mounted on one end of the movable rod 362. A pressing block 364 is fixed to the surface of the end rod 363. The end of the clamping block 364 is engaged with the surface of the base sleeve 34; the rectangular seat 361 has a transverse through hole corresponding to the movable rod 362; the clamping mechanism 36 also includes an inner sliding groove 367 formed on the inner wall of one side of the transverse through hole; an inner slider 368 is movably mounted in the inner sliding groove 367 by a spring 369, and one end of the inner slider 368 is fixed to the movable rod 362; a base rod with a T-shaped cross-section is fixed to one end surface of the movable rod 362, and the end rod 363 is rotatably sleeved on the base rod; the clamping mechanism 36 also includes a positioning block 365 and a positioning hole 366; a positioning block 365 is fixed to one side of the clamping block 364, and positioning holes 366 are formed on both ends of the base sleeve 34. The positioning block 365 is inserted into the positioning hole 366; the trumpet-shaped stem flow rain collection cover 3 also includes a water sealing structure 38, which is set on the inner wall of the bottom end of the half cover 31; the water sealing structure 38 includes a water sealing pad 381 embedded in the inner wall of the bottom end of the half cover 31, and the surface of the water sealing pad 381 is provided with multiple integrated annular sealing protrusions 382, ​​and the annular sealing protrusions 382 are in close contact with the corn seedling 4; the portable field simulated rain device 5 includes two main water pipes 51 and multiple transverse pipes 52 set between the two main water pipes (51), each transverse pipe 52 is provided with multiple nozzles (53), and one side of one of the main water pipes 51 is also provided with a water inlet pipe 54;

[0011] The interior of the water-guiding bottom groove 37 is lined with microporous ceramic sheets with a pore size of 0.05mm, which enables water distribution uniformity to reach more than 92%. The water-guiding pipe 32 is a controllable water supply pipe made of medical-grade silicone material. The inlet of the water-guiding pipe 32 is connected to a micro peristaltic pump with a flow rate range of 0.1-50mL / min.

[0012] The nozzle 53 is an adjustable drip irrigation needle, and the orifice diameter of the adjustable drip irrigation needle is adjustable in the range of 0.3-1.2mm.

[0013] The bottom of the rain bucket 1 is equipped with a sensor for monitoring three parameters: soil moisture content, temperature, and electrical conductivity.

[0014] A frequency domain reflection sensor is embedded in the inner side of the sealing gasket 381; a temperature compensation probe is pre-embedded in the annular sealing protrusion 382.

[0015] The information output terminals of the frequency domain reflection sensor, temperature compensation probe, and three-parameter sensor are connected to the information input terminal of the PLC. The PLC is connected to the control terminal of the micro peristaltic pump, and the video information output terminal of the PLC is connected to the video signal input terminal of the touch screen.

[0016] Due to the adoption of the above technical solutions, this utility model has the following beneficial effects:

[0017] By laying microporous ceramic plates inside the water guide channel, the water distribution uniformity can reach more than 92%, supporting gradual water volume control from drought to re-watering, and solving the problem that traditional equipment cannot simulate gradient water supply.

[0018] The water pipe, made of medical-grade silicone material, is highly resistant to biological contamination. The peristaltic pump provides ±0.5% flow accuracy for actively regulating irrigation water volume and supporting precise re-watering simulation after a sudden drought.

[0019] Because the nozzle 53 has an adjustable orifice diameter, it can achieve differentiated water distribution, adapt to the individual recovery needs of corn, and enhance the flexibility of the experiment.

[0020] The refill curve (such as stepped water supply) can be preset through a PLC programmer, and the data can be displayed in real time on a touch screen, which solves the problem of large errors in manual observation and builds automated control.

[0021] Frequency domain reflectance sensor and temperature compensation probe can monitor changes in stem moisture in real time. The material improves the pressure resistance to 20kPa and can be used to build closed-loop feedback systems such as automatically adjusting water supply based on stem moisture data.

[0022] The three-parameter sensor can feed data back to the PLC in real time, linking with the stem moisture module to provide root status data and solve the problem of missing linkage monitoring between the canopy and the root system. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. 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 illustrating the working principle of the background technology section of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model;

[0026] Figure 3 This utility model Figure 1 A magnified view of a portion of region A in the middle;

[0027] Figure 4 This is a cross-sectional view of the trumpet-shaped stem flow rain collection cover of this utility model;

[0028] Figure 5 This is a cross-sectional view of the clamping mechanism of this utility model;

[0029] Figure 6 This utility model Figure 3 Enlarged view of a portion of the central sealing water structure;

[0030] Figure 7 This is a schematic diagram illustrating the working principle of this utility model; Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Example

[0032] See Figure 2-6This specific embodiment is implemented using the following technical solution, which includes a rain-collecting bucket 1, an external plastic tray 2, a funnel-shaped stalk flow rain-collecting cover 3, and a portable field simulated rain device 5. Multiple corn seedlings 4 are placed below the portable field simulated rain device 5. Multiple rain-collecting buckets 1 are randomly placed among the corn seedlings 4. A funnel-shaped stalk flow rain-collecting cover 3 is installed at the bottom of each corn seedling 4. The external plastic tray 2 is placed on the ground. The funnel-shaped stalk flow rain-collecting cover 3 includes two half-covers 31, which are fitted onto the bottom of the corn seedlings 4. A water-guiding groove 37 is formed on the inner bottom of each half-cover 31, and the surface of one half-cover 31 is provided with a groove that connects to the water-guiding groove. A water pipe 32 is connected to the outer plastic disc 2 and extends to the inner side of the outer plastic disc 2. One half-cover 31 has a base 33 fixed to both ends, and the other half-cover 31 has a base sleeve 34 fixed to both ends. A positioning rod 35 is fixed to one side of the base 33, and the end of the positioning rod 35 extends through to one side of the base sleeve 34. A clamping mechanism 36 is also provided between the base 33 and the base sleeve 34. The clamping mechanism 36 includes a rectangular seat 361 fixed to the upper and lower surfaces of the base 33. A movable rod 362 is provided through the interior of the rectangular seat 361, and an end rod 363 is rotatably mounted to one end of the movable rod 362. A pressing block 364 is fixed to the surface of the end rod 363. The end of the clamping block 364 is engaged with the surface of the base sleeve 34; the rectangular seat 361 has a transverse through hole corresponding to the movable rod 362; the clamping mechanism 36 also includes an inner sliding groove 367 formed on the inner wall of one side of the transverse through hole; an inner slider 368 is movably mounted in the inner sliding groove 367 by a spring 369, and one end of the inner slider 368 is fixed to the movable rod 362; a base rod with a T-shaped cross-section is fixed to one end surface of the movable rod 362, and the end rod 363 is rotatably sleeved on the base rod; the clamping mechanism 36 also includes a positioning block 365 and a positioning hole 366; a positioning block 365 is fixed to one side of the clamping block 364, and positioning holes 366 are formed on both ends of the base sleeve 34. The positioning block 365 is inserted into the positioning hole 366; the trumpet-shaped stem flow rain collection cover 3 also includes a water sealing structure 38, which is set on the inner wall of the bottom end of the half cover 31; the water sealing structure 38 includes a water sealing pad 381 embedded in the inner wall of the bottom end of the half cover 31, and the surface of the water sealing pad 381 is provided with multiple integrated annular sealing protrusions 382, ​​and the annular sealing protrusions 382 are in close contact with the corn seedling 4; the portable field simulated rain device 5 includes two main water pipes 51 and multiple transverse pipes 52 set between the two main water pipes (51), each transverse pipe 52 is provided with multiple nozzles (53), and one side of one of the main water pipes 51 is also provided with a water inlet pipe 54;

[0033] The interior of the water-guiding bottom groove 37 is lined with microporous ceramic sheets with a pore size of 0.05mm, which enables water distribution uniformity to reach more than 92%. The water-guiding pipe 32 is a controllable water supply pipe made of medical-grade silicone material. The inlet of the water-guiding pipe 32 is connected to a micro peristaltic pump with a flow rate range of 0.1-50mL / min.

[0034] The nozzle 53 is an adjustable drip irrigation needle, and the orifice diameter of the adjustable drip irrigation needle is adjustable in the range of 0.3-1.2mm.

[0035] The bottom of the rain bucket 1 is equipped with a sensor for monitoring three parameters: soil moisture content, temperature, and electrical conductivity.

[0036] A frequency domain reflection sensor is embedded in the inner side of the sealing gasket 381; a temperature compensation probe is pre-embedded in the annular sealing protrusion 382.

[0037] The information output terminals of the frequency domain reflection sensor, temperature compensation probe, and three-parameter sensor are connected to the information input terminal of the PLC. The PLC is connected to the control terminal of the micro peristaltic pump, and the video information output terminal of the PLC is connected to the video signal input terminal of the touch screen.

[0038] See Figure 7 In this embodiment, the funnel-shaped stem flow rain collection cover is modified into a plant recovery water control cover, enabling it to actively and precisely supply water. Specific measures include: replacing the water guide pipe 32 with a silicone tube with controllable flow rate, and integrating a micro peristaltic pump to achieve precise flow control of 0.1-50 mL / min; and modifying the water guide bottom groove into a ring water distributor to evenly wet the base of the stem through micropores.

[0039] Flexible silicone tubes are used instead of rigid PVC tubes to reduce turbulence and improve the stability of micro-water supply; a frequency domain reflection sensor is embedded inside the water-sealing pad to achieve real-time monitoring of stem moisture.

[0040] A stem moisture sensor (integrated into the cover) and a soil moisture probe are added to form a stem-soil dual feedback system. Combined with a PLC controller, the water supply is automatically adjusted based on the monitoring data to achieve intelligent gradient water supply.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An apparatus for treating sudden drought in maize, comprising a rain-collecting bucket (1), an external plastic tray (2), a funnel-shaped stalk flow rain-collecting hood (3), and a portable field simulated rain device (5), wherein multiple maize seedlings (4) are arranged below the portable field simulated rain device (5), multiple rain-collecting buckets (1) are randomly placed between multiple maize seedlings (4), and a funnel-shaped stalk flow rain-collecting hood (3) is installed at the bottom of each maize seedling (4). The external plastic tray (2) is set on the ground, and the funnel-shaped stalk flow rain-collecting hood (3) comprises two half-covers (31), which are fitted onto the bottom of the maize seedlings (4). A water-guiding groove (37) is provided on the inner bottom of each half-cover (31), one of which... The surface of the half-cover (31) is provided with a water guide pipe (32) communicating with the water guide bottom groove (37), and the water guide pipe (32) extends all the way to the inside of the outer plastic plate (2); one half-cover (31) has a base (33) fixed on both ends of its surface, and the other half-cover (31) has a base sleeve (34) fixed on both ends of its surface. A positioning rod (35) is fixed on one side of the base (33), and the end of the positioning rod (35) extends through to one side of the base sleeve (34). A clamping mechanism (36) is also provided between the base (33) and the base sleeve (34); the clamping mechanism (36) includes a rectangular seat (361) fixed on the upper and lower surfaces of the base (33), and a movable rod (36) is provided through the interior of the rectangular seat (361). 2), and an end rod (363) is rotatably mounted on one end of the movable rod (362), and a clamping block (364) is fixed on the surface of the end rod (363), and the end of the clamping block (364) is stuck on the surface of the base sleeve (34); a transverse through hole corresponding to the movable rod (362) is opened on the rectangular seat (361), and the clamping mechanism (36) further includes an inner sliding groove (367) opened on the inner wall of one side of the transverse through hole, and an inner slider (368) is movably mounted in the inner sliding groove (367) by a spring (369), and one end of the inner slider (368) is fixed to the movable rod (362); a base rod with a T-shaped cross section is fixed on the surface of one end of the movable rod (362), and the end rod (363) is rotatably sleeved on the base rod; The clamping mechanism (36) further includes a positioning block (365) and a positioning hole (366). The positioning block (365) is fixed on one side of the clamping block (364). The positioning holes (366) are opened on both ends of the base sleeve (34), and the positioning block (365) is inserted into the positioning hole (366). The trumpet-shaped stem flow rain collection cover (3) further includes a water sealing structure (38). The water sealing structure (38) is set on the bottom inner wall of the half cover (31). The water sealing structure (38) includes a water sealing pad (381) embedded in the bottom inner wall of the half cover (31). The surface of the water sealing pad (381) is provided with multiple integrated annular sealing protrusions (382), and the annular sealing protrusions (382) are in close contact with the corn seedling (4).The portable field simulated rain generator (5) includes two main water pipes (51) and a plurality of transverse pipes (52) disposed between the two main water pipes (51). Each transverse pipe (52) is provided with a plurality of nozzles (53). One of the main water pipes (51) is also provided with an inlet pipe (54) on one side. The feature is that: The interior of the water guide trough (37) is lined with microporous ceramic sheets with a pore size of 0.05 mm. The water guide pipe (32) is a controllable water supply pipe made of medical-grade silicone material. The inlet of the water guide pipe (32) is connected to a micro peristaltic pump with a flow rate range of 0.1-50 mL / min.

2. The device for experimental treatment of sudden drought in maize according to claim 1, characterized in that: The nozzle (53) is an adjustable drip irrigation needle, and the orifice diameter of the adjustable drip irrigation needle is adjustable in the range of 0.3-1.2mm.

3. The device for experimental treatment of sudden drought in maize according to claim 2, characterized in that: The bottom of the rain bucket (1) is equipped with sensors for monitoring three parameters: soil moisture content, temperature, and electrical conductivity.

4. The device for experimental treatment of sudden drought in maize according to claim 3, characterized in that: A frequency domain reflection sensor is embedded in the inner side of the sealing gasket (381); a temperature compensation probe is pre-embedded in the annular sealing protrusion (382).

5. The device for experimental treatment of sudden drought in maize according to claim 4, characterized in that: The information output terminals of the frequency domain reflection sensor, temperature compensation probe, and three-parameter sensor are connected to the information input terminal of the PLC. The PLC is connected to the control terminal of the micro peristaltic pump, and the video information output terminal of the PLC is connected to the video signal input terminal of the touch screen.

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