Device for screening salt tolerance threshold value of plant

Abstract

The utility model belongs to the technical field of plant protection, and discloses a plant salt tolerance threshold screening device which comprises cultivation containers, a monitoring device, a liquid inlet system and a liquid discharge system, and the interior of the plant salt tolerance threshold screening device is divided into two rows of cultivation containers which are sequentially connected in series; the liquid inlet system comprises a liquid inlet, a liquid inlet pipe, a flow meter and a spray head, the monitoring device comprises a salt content monitor and a salt content receptor, and the liquid discharge system comprises a liquid discharge switch, a liquid discharge pipe, a filter membrane and an air pump. The device is low in manufacturing cost, high in mobility and reusable; the concentration of the salt solution entering the cultivation container can be accurately regulated and controlled through the flow meter according to the actual situation and the information fed back by the monitoring device, and the salt concentration in the cultivation container can be maintained for a long time; the operation process is simple; the device is high in stability and has good reproducibility.

Description

Technical Field

[0001] The utility model belongs to the technical field of plant protection and relates to a device for screening the salt tolerance threshold of plants. Background Art

[0002] The salt tolerance threshold of a plant refers to the highest salt content in the soil that the plant can tolerate under the condition of ensuring normal growth. There are differences in the salt tolerance thresholds of different plants, which mainly depend on the physiological characteristics of the plants themselves and the growth environment. Research shows that some plants such as Salicornia europaea, Suaeda salsa, and Karelinia caspica can maintain a high survival rate under certain salt concentration conditions. On the contrary, some plants such as celery and Lythrum salicaria have poor salt tolerance. These reflect the different responses and regulatory abilities of different plants to salt through physiological regulation. At present, for the determination of the salt tolerance threshold of plants, the indoor cultivation method is mainly adopted. By carrying out a series of salt concentration gradient tests, indicators such as the germination rate of plants, the content of proline, the activity of peroxidase, and membrane lipid peroxidation are measured. Patent CN202121665200.0 discloses a soil salt constant device for measuring the salt tolerance threshold of crops, including: a soil column container, a liquid component, a controller, etc., which can accurately measure the salt tolerance threshold of crops at different growth stages and is used to guide the formulation of field irrigation and drainage decisions. Patent CN201811020545.3 discloses a method for identifying the salt tolerance of greening seedlings at the seedling stage. By selecting greening seedlings with relatively consistent growth and development, transplanting them into vermiculite pots, and irrigating the prepared nutrient solution every day. After 1-2 weeks, add the pre-prepared sodium chloride aqueous solution, and start salt stress treatment according to the concentration gradient. After a certain period of time, cut and weigh the above-ground part of the plant, and use SPSS software for curve regression estimation analysis to obtain the salt stress attenuation coefficient of the plant, and then the salt tolerance threshold of the plant can be obtained. This method is simple to operate and has strong repeatability, and can more accurately determine the true salt tolerance of seedlings. Patent CN202010422679.9 discloses a method and system for determining the irrigation regime of the desert plant Haloxylon ammodendron. By determining the salt tolerance threshold and water tolerance threshold of Haloxylon ammodendron plants at different growth stages, and then measuring the current soil water and salt content, and further judging whether the measured soil water and salt content is less than the water tolerance threshold and salt tolerance threshold corresponding to the corresponding period, this further reduces the waste of excess water and improves the irrigation water use of plants. In summary, how to quickly and accurately measure the salt tolerance threshold of plants is of great significance for efficient crop cultivation and improving the water use efficiency of crops.

[0003] Therefore, for different types of plants from different sources, the utility model provides a device for quickly testing the salt tolerance threshold of plants. The device includes a main cultivation container, an auxiliary monitoring device, an internal liquid inlet system and a liquid discharge system, and is placed as a whole in a container with an approximate cuboid shape, which can realize automatic liquid inlet and liquid discharge, and the test results have good stability and reproducibility. Summary of the Utility Model

[0004] The object of the utility model is to provide a device for screening the salt tolerance threshold of plants.

[0005] The technical solution of the utility model:

[0006] A device for screening the salt tolerance threshold of plants, the device is of a square box structure, and its interior is divided into two rows of cultivation containers 7 connected in series in sequence; the device for screening the salt tolerance threshold of plants includes a liquid inlet system, a monitoring device, a cultivation container 7 and a liquid discharge system; wherein,

[0007] The liquid inlet system includes a liquid inlet 1, a liquid inlet pipe 2, a flowmeter 3 and a spray head 4;

[0008] The monitoring device includes a salt content monitor 5 and a salt content sensor 6;

[0009] The liquid discharge system includes a liquid discharge switch 8, a liquid discharge pipe 9, a filter membrane 10 and an air pump 11;

[0010] The liquid inlet 1 is connected to the liquid inlet pipe 2, and multiple liquid outlet spray heads 4 are communicated through the liquid inlet pipe 2, and the whole is placed in the wall cavity of the square box structure; a flowmeter 3 is arranged on the liquid inlet pipe 2, and the flowmeter 3 is fixed on the outer wall of the square box structure and is located above the cultivation container 7, and a liquid outlet controlled by the flowmeter 3 is provided with a spray head 4; the salt content monitor 5 is installed on the outer wall of the square box structure, and it is connected to the salt content sensor 6, and the salt content sensor 6 is located on the inner wall of the cultivation container 7 and is located below the cultivation container 7; the salt content sensor 6 monitors the salt content rate in the cultivation container 7 in real time, and then regulates the flowmeter 3 to accurately regulate the volume of the salt solution added to the cultivation container 7; a drain port is arranged at the bottom of the cultivation container 7, and a filter membrane 10 is arranged at the drain port; multiple drain ports are aggregated into the liquid discharge pipe 9, one end of the liquid discharge pipe 9 is an air pump 11 arranged outside the square box structure, and the other end is a liquid discharge switch 8 arranged outside the square box structure, and the salt solution in the cultivation container 7 enters the liquid discharge system through the filter membrane 10 on the liquid discharge pipe 9, and the liquid inside the liquid discharge system is discharged under the pressure of the air pump 11 through the control of the liquid discharge switch 8.

[0011] The materials of the liquid inlet 1, the liquid inlet pipe 2, the spray head 4, the cultivation container 7, the liquid discharge switch 8 and the liquid discharge pipe 9 are plastic materials.

[0012] The liquid inside the cultivation container 7 is discharged from the device for screening the salt tolerance threshold of plants under the pressure of the air pump 11 through the liquid discharge switch 8 and the liquid discharge pipe 9.

[0013] Advantages of the present utility model: (1) The device has low manufacturing cost, strong mobility, and can be reused; (2) According to the actual situation and the information feedback by the monitoring device, the salt solution concentration entering the cultivation container can be accurately regulated through a flow meter, and the salt concentration in the cultivation container can be maintained for a long time; (3) The operation process is simple, saving manpower; (4) The device has strong stability and good reproducibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front perspective view of the device for screening the salt tolerance threshold of plants.

[0015] Figure 2 is a top perspective view of the device for screening the salt tolerance threshold of plants.

[0016] Figure 3 is a left perspective view of the device for screening the salt tolerance threshold of plants.

[0017] Figure 4 is an external view of the device for screening the salt tolerance threshold of plants.

[0018] Figure 5 is the liquid inlet system of the device for screening the salt tolerance threshold of plants.

[0019] Figure 6 is the liquid drainage system of the device for screening the salt tolerance threshold of plants.

[0020] In the figure: 1 liquid inlet, 2 liquid inlet pipe, 3 flow meter, 4 nozzle, 5 salt content monitor, 6 salt content sensor, 7 cultivation container, 8 liquid drainage switch, 9 liquid drainage pipe, 10 filter membrane, 11 air pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the specific embodiments of the present utility model in conjunction with the drawings and technical solutions.

[0022] Embodiment 1

[0023] A device for screening the salt tolerance threshold of plants, as Figure 1 shown, includes a cultivation container 7, a monitoring device, a liquid inlet system, and a liquid drainage system; the overall device is in the shape of a cuboid composed of two rows of small cubes connected in series.

[0024] The device for screening the salt tolerance threshold of plants consists of a cultivation container 7, a monitoring device, a liquid inlet system, and a liquid discharge system that are connected in series from left to right. It is composed of two rows of internally connected cultivation containers 7, and the overall external shape of the device is rectangular parallelepiped, making it convenient to transfer. Liquid inlet system: There is a flowmeter 3 fixed on the liquid inlet pipe 2 and hanging above the cultivation container 7, and a nozzle 4 is arranged thereon, which can evenly spread the salt solution in the cultivation container 7; a salt content sensor 6 is arranged on the inner wall of the cultivation container 7, and the salt content rate in the cultivation container 7 can be monitored in real time through the salt content sensor 6. The salt content monitor 5 can adjust the flowmeter 3 according to the information of the salt content sensor 6, so as to accurately control the volume of the salt solution added to the cultivation container 7, enabling the plants to grow in the expected salt stress environment and screening the salt tolerance threshold of the plants. Liquid discharge system: After the experiment is completed, the salt solution in the cultivation container 7 enters the liquid discharge system through the filter membrane 10 on the liquid discharge pipe 9, and the liquid inside the liquid discharge system is discharged from the device for screening the salt tolerance threshold of the plants under the pressure of the air pump 11 through the liquid discharge switch 8.

[0025] Example 2 The test process for screening the salt tolerance threshold of plants.

[0026] Weigh a quantitative amount of soil m and add it to the cultivation container 7 respectively, and put experimental plants with relatively consistent growth and development into them respectively. Turn on and set the salt concentration of the salt content monitor 5 on the outer wall of each cultivation container 7, and form a concentration gradient in sequence. Connect a salt solution with a certain concentration to the liquid inlet 1, and accurately control the salt solution to enter each cultivation container 7 according to the calculation of the flowmeter 3. When the salt content sensor 6 detects that the salt content in the cultivation container 7 reaches the set standard, the detected information is used to adjust the flowmeter 3, and the salt solution is stopped from continuing to enter the cultivation container 7. The plants in the cultivation container 7 are cultivated for a period of time under the set salt concentration. During this period, the salt content sensor 6 on the inner wall of the cultivation container 7 will monitor the salt content rate in the cultivation container 7 in real time, and the salt content monitor 5 will adjust the flowmeter 3 according to the information detected by the salt content sensor 6 to accurately control the continuous or stop of adding the salt solution to the cultivation container 7, enabling the plants to always grow in the expected salt stress environment and screening out the salt tolerance threshold of the plants. After the screening is completed, turn on the air pump 11 and the liquid discharge switch 8, add distilled water from the liquid inlet to make it enter the cultivation container 7 to wash the remaining salt and clean the device. Using this device in the operation process can achieve an automated experiment with relatively small errors and has good repeatability.

Claims

1. A device for screening plant salt tolerance threshold, characterized in that: The device for screening the salt tolerance threshold of plants is a square box structure, the interior of which is divided into two rows of cultivation containers (7) connected in series; the device for screening the salt tolerance threshold of plants comprises a liquid inlet system, a monitoring device, a cultivation container (7) and a liquid drainage system; wherein, The liquid inlet system comprises a liquid inlet (1), a liquid inlet pipe (2), a flow meter (3) and a nozzle (4); The monitoring device comprises a salt content monitor (5) and a salt content sensor (6); The liquid discharge system comprises a liquid discharge switch (8), a liquid discharge pipe (9), a filter membrane (10) and an air pump (11); The liquid inlet (1) is connected to the liquid inlet pipe (2), and a plurality of liquid outlet nozzles (4) are connected through the liquid inlet pipe (2), and the whole is placed in a wall cavity of a square box structure; a flow meter (3) is provided on the liquid inlet pipe (2), and the flow meter (3) is fixed on the outer wall surface of the square box structure and located at the upper part of the cultivation container (7); the liquid outlet controlled by the flow meter (3) is provided with a nozzle (4); a salt content monitor (5) is installed on the outer wall surface of the square box structure, and is connected to a salt content sensor (6), and the salt content sensor (6) is located on the inner wall surface of the cultivation container (7) and located at the lower part of the cultivation container (7); the salt content sensor (6) monitors the salt content in real time. The salt content in the cultivation container (7) is measured, and the flow meter (3) is adjusted to accurately adjust the volume of the salt solution added to the cultivation container (7); a drainage port is provided at the bottom of the cultivation container (7), and a filter membrane (10) is provided at the drainage port; the plurality of drainage ports are connected to a drainage pipe (9); one end of the drainage pipe (9) is an air pump (11) arranged outside the square box structure, and the other end is a drainage switch (8) arranged outside the square box structure; the salt solution in the cultivation container (7) enters the drainage system through the filter membrane (10) on the drainage pipe (9), and the liquid inside the drainage system is discharged under the pressure of the air pump (11) through the drainage switch (8) under the control of the drainage switch (8).

2. The device for screening plant salt tolerance threshold according to claim 1, characterized in that: The liquid inlet (1), the liquid inlet pipe (2), the nozzle (4), the cultivation container (7), the liquid discharge switch (8) and the liquid discharge pipe (9) are made of plastic material.

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