Device and method for measuring the influence of pollutants at specific positions in soil on plant roots

Abstract

The present invention discloses a device and method for measuring the influence of pollutants at specific positions in soil on plant roots, including a root growth area, a root scanning area, and a pollution stress area at a specific part of the soil near the plant roots; one side of the root growth area is connected to the horizontally placed and transparent root scanning area; the outlet of the pollution stress area at a specific part of the soil near the plant roots is inserted into the root scanning area; the inlet of the pollution stress area at a specific part of the soil near the plant roots is outside the root scanning area; in the present invention, whether adding a single pollutant or a composite pollutant, or adding once or multiple times, at intervals or continuously, it can be carried out outside the root scanning area without pulling out the roots, which not only reduces the damage to the plant roots, but also simplifies the operation a lot, improving the convenience and efficiency of research.

Description

Technical Field

[0001] The present invention relates to the technical field of plant root research, and specifically to an apparatus and method for measuring the influence of pollutants at specific positions in soil on plant roots. Background Art

[0002] Plant roots are divided into main roots and lateral roots, and different parts of the main roots and lateral roots have different absorption capabilities. Pollutants can cause pollution at different positions near the main roots and lateral roots of the roots, that is, it can be a single-position pollution source or multiple-position pollution sources. These pollutants at different positions will have significantly different effects on the root dynamics of plants. Commonly used methods for studying the influence of pollutants on the growth of plant roots mostly involve adding pollutants to the soil surface where the roots grow. Due to the action of gravity, the added pollutants will naturally flow to the bottom of the soil. The pollutants cannot stay at specific parts of the roots for a long time, and it is impossible to measure the influence of pollutants at specific positions in the soil near the plant roots on the plant roots.

[0003] In the "Journal of Anhui Agricultural Sciences" compiled by Xu Lulu, Wang Han, Gao Panpan, etc., the influence of environmental stress on the root morphology of plants is mentioned, and the influence of specific elements in environmental pollution on the growth of plant roots is introduced. For the study of the growth trend of plants after being affected by pollutants, it is divided into branches and leaves and roots. Since the roots are buried in the soil, in the existing methods, after the plants grow for several days, a pollution source needs to be applied to the soil where the plant roots grow. Due to the gravitational action of the added pollutants, the pollutants will automatically flow from the top of the soil to the bottom of the soil, and the pollutants cannot stay at specific parts of the soil near the roots for a long time, and it is impossible to measure the influence of pollutants at specific positions in the soil on the plant roots; when measuring the corresponding indicators, the plants need to be pulled out to observe the roots, and the operation is cumbersome, especially the operation of applying the pollution source, making it difficult to measure the influence of pollutants at specific positions in the soil on the plant roots.

[0004] The comparative document with the publication number of CN102180730B discloses a preparation method of a nematode-killing microbial organic fertilizer. In its background art, it is introduced that the problem of soil degradation and humus deterioration caused by excessive application of chemical fertilizers has gradually attracted people's attention. Through research, long-term excessive application of chemical fertilizers will lead to problems such as soil compaction and degradation, low organic matter content, and humus deterioration. However, specific research and detection methods for the data of these plants being damaged are not mentioned, and an effective detection device is not provided to study and test the growth of plant roots when they are affected by environmental pollution. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an apparatus and method for measuring the influence of pollutants at specific positions in soil on plant roots, which are simple to operate and convenient for research.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: It includes a plant planting area, a root growth area, a root scanning area, and a pollution stress area for specific parts of the soil near the plant roots; one side of the root growth area is connected to the horizontally placed and transparent root scanning area; the outlet of the pollution stress area for specific parts of the soil near the plant roots is inserted into a specific part of the soil near the plant roots in the root scanning area; the inlet of the pollution stress area for specific parts of the soil near the plant roots is outside the root scanning area; the plant planting area is erected on the top of the root growth area; the specific parts of the soil near the plant roots include the soil near the top, middle, and bottom of the main root of the plant roots, and the soil near the middle and bottom of each lateral root.

[0007] By separating the root growth area and the root scanning area, and the root scanning area is horizontally placed, it effectively solves the problem that the added pollutants will naturally flow into the bottom of the soil due to the action of gravity, and the pollutants cannot stay in specific parts of the roots for a long time; it is also convenient for the plant roots to grow along the bottom wall of the root scanning area, and then apply pollutants to specific parts of the soil near the roots in the root scanning area through the inlet of the pollution stress area for specific parts of the soil near the plant roots. Whether adding a single pollutant or a composite pollutant, or adding once or multiple times, at intervals or continuously, it can be carried out outside the root scanning area without pulling out the roots. This not only reduces damage to the plant roots, but also simplifies the operation a lot, improving the convenience and efficiency of research.

[0008] Preferably, the plant planting area includes a planting box, a water injection port, and a light source; the planting box is a funnel-shaped box with a large upper opening and a small lower opening; a light source with the light directed towards the inside of the planting box is fixed on the top wall of the planting box; a water injection port is opened on the side wall of the planting box; a spray nozzle is embedded in the water injection port; the spray nozzle is connected to a water source through a water inlet pipe.

[0009] Preferably, the root growth area includes a growth box, a soil burial inlet, and a sealing door; the growth box is fixed at the bottom opening of the plant planting area; and the plant planting area is communicated with the top opening of the growth box; a soil burial inlet is opened on the outer side of the growth box; nutrient soil is buried into the growth box through the soil burial inlet; a sealing door is rotatably connected to one side of the soil burial inlet through a hinge; the sealing door is used in cooperation with the soil burial inlet to close or open the soil burial inlet.

[0010] Preferably, the root scanning area includes a transparent scanning box; the root scanning area includes a transparent scanning box; the scanning box is horizontally placed, and one end is communicated with the root growth area; a layer of soil with a thickness not exceeding 2 cm is laid in the scanning box.

[0011] Preferably, the specific part pollution stress area of the soil near the plant roots includes a storage bucket, a main pipe, and branch pipes; a single or multiple composite pollutants are placed in the storage bucket; the bottom of the storage bucket is connected to the main pipe; a plurality of branch pipes are connected to the main pipe; the nozzle of the branch pipe is inserted into a specific part of the root scanning area set by the research plan; a needle-shaped drip irrigation device is connected to the nozzle of the branch pipe; the needle-shaped drip irrigation device is arranged at the discharge node around the plant roots; a main valve for controlling the opening and closing of the main path of the main pipe is installed on the main pipe; a branch valve for controlling the opening and closing of the branch pipe is fixed to the branch pipe by bolts.

[0012] Preferably, the specific part pollution stress area of the soil near the plant roots further includes a discharge node group; the discharge node group includes soil nodes near the top of the main root, soil nodes near the middle of the main root, soil nodes near the tail of the main root, soil nodes near the middle of the lateral root, and soil nodes near the tail of the lateral root, all of which are in the scanning box; the soil nodes near the top of the main root, the soil nodes near the middle of the main root, and the soil nodes near the tail of the main root are sequentially arranged in the soil near the head, middle, and tail of the main root in the bifurcation area; the soil nodes near the middle of the lateral root and the soil nodes near the tail of the lateral root are distributed in the soil near the middle and tail of the lateral root in the bifurcation area; the soil nodes near the middle of the main root, the soil nodes near the tail of the main root, the soil nodes near the middle of the lateral root, and the soil nodes near the tail of the lateral root all correspond to the nozzles of the branch pipes one by one.

[0013] Nutrient soil is buried into the device through the soil burial inlet, and then plants are planted in the planting box. The branches and leaves area of the plants grows upward above the planting box, the main root area penetrates into the growth box, and the bifurcation area grows along the horizontally placed scanning box. When studying the dynamic impact of environmental pollutants on the roots, by opening and closing the main valve and the branch valve, single or composite pollutants flow from the storage bucket along the main pipe and the branch pipes, and are applied to the plant roots once or multiple times, continuously or intermittently, and at different root positions. The operation is simple and there is no need to pull up and plant the plants multiple times. When the plant roots grow towards the root scanning area, they grow downward under their own weight. Since the soil thickness does not exceed 2 cm, the plant roots grow close to the bottom of the root scanning area, and then are scanned or observed through the transparent bottom of the root scanning area to record data, which simplifies the operation and brings great convenience to the experiment.

[0014] A method for measuring the impact of pollutants at specific soil positions on plant roots includes the following steps:

[0015] The device for measuring the impact of pollutants at specific locations in soil on plant roots contains plants; the plants include a foliage area, a main root area, and a branching area connected in sequence; the foliage area is distributed in the plant planting area; the main root area is inserted into the nutrient soil in the root growth area; the branching area extends and grows towards the root scanning area, and under the action of the plant growth habit, the branching area grows towards the bottom of the root scanning area; the branching area includes a main root and lateral roots; multiple lateral roots grow on the main root;

[0016] S1 Add nutrient soil with a thickness not exceeding 2 cm to the root scanning area, and add nutrient soil to the root growth area. Bury the plant seeds in the nutrient soil.

[0017] S2 The plants grow for a period of time, break through the soil, and the foliage area grows into the plant planting area. Provide light and water to the plants in the plant planting area. The main root area extends towards the root scanning area to form a branching area.

[0018] S3 Select pollutants and add them to the specific part pollution stress area in the soil near the plant roots.

[0019] S4 At a specific part of the branching area of the plant, such as the middle position of the main root, open a channel corresponding to the specific part pollution stress area in the soil near the plant roots at the middle of the main root. The pollutants enter the middle position of the main root through the channel.

[0020] S5 After 2 - 3 days, use a scanner to scan the root situation of the plants in the root scanning area.

[0021] S6 Measure the root indexes, specifically observe and measure the main root length, main root width, root spread, number of root branches, lateral root length, and lateral root width on the scanned image.

[0022] S7 Analyze the impact of pollutants on the dynamics of plant roots.

[0023] The set discharge node group improves the accuracy of pollutant application. Then the plant roots grow close to the plant scanning area and can be directly observed at the bottom of the transparent plant scanning area. Use a scanner to draw and record. The whole process does not require pulling out the plants, and the data can be directly observed on the scanned image. The research accuracy is high, saving a large amount of research time and improving the research efficiency.

[0024] Preferably, in S3, select a variety of composite pollutants, specifically select the mixed pollutants of pesticides and antimony.

[0025] Preferably, in S4, add it every 2 days, a total of 3 times, and each time add 1 ml of antimony with a concentration of 100 μg / L.

[0026] Preferably, in S4, select a needle-shaped drip irrigation device with a gradually narrowing outlet. Under the action of gravity, continuously and uninterruptedly drip pollutants on the plant roots.

[0027] Through a variety of experimental schemes, the effects of environmental pollutants on plant roots are studied from multiple perspectives, including the types of pollutants themselves, the positions of plant roots, the number of times of pollutant application, and the interval duration of pollutant application, so as to improve the accuracy of the research.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] A. By separating the root growth area and the root scanning area, and placing the root scanning area horizontally, it is convenient for plant roots to grow along the bottom wall of the root scanning area. Then, pollutants are applied into the root scanning area through the inlet of the specific pollution stress area of the soil near the plant roots. Whether a single pollutant or a composite pollutant is added, or whether it is added once or multiple times, at intervals or continuously, it can be carried out outside the root scanning area without pulling out the roots. This not only reduces the damage to the plant roots but also simplifies the operation a lot, improving the convenience and efficiency of the research.

[0030] The arranged discharge node group improves the accuracy of pollutant application. Then, the plant roots grow along the plant scanning area, and can be directly observed at the bottom of the transparent plant scanning area. Using a scanner to draw and record, the plant does not need to be pulled out throughout the process, and data can be directly observed on the scanned image, with high research accuracy, saving a large amount of research time and improving the research efficiency.

[0031] B. Nutrient soil is buried into the device through the soil burial inlet, which is convenient for adding and discharging nutrient soil.

[0032] When studying the dynamic effects of environmental pollutants on roots, through the main valve and branch valves, single or composite pollutants are applied to the plant roots once or multiple times, continuously or intermittently, and at different root positions from the storage bucket along the main pipe and branch pipes, and the operation is simple.

[0033] When the plant roots grow towards the root scanning area, under the action of their own weight, they grow downward. Since the soil thickness does not exceed 2 cm, the plant roots grow along the bottom of the root scanning area, and then are scanned or observed through the bottom of the transparent root scanning area to record data, simplifying the operation and bringing great convenience to the experiment.

[0034] Through a variety of experimental schemes, the effects of environmental pollutants on plant roots are studied from multiple perspectives, including the types of pollutants themselves, the positions of plant roots, the number of times of pollutant application, and the interval duration of pollutant application, so as to improve the accuracy of the research. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a front view sectional structure schematic diagram of the device for measuring the effects of pollutants at specific soil positions on plant roots in Embodiment 1 of the present invention.

[0036] Figure 2This is the pollution node distribution map of the plant roots in the second embodiment of the present invention.

[0037] Reference numerals in the drawings: 1, plant planting area; 11, planting box; 12, water injection port; 13, light source; 2, root growth area; 21, growth box; 22, soil burial inlet; 23, sealing door; 3, root scanning area; 4, pollution stress area at specific parts of the soil near the plant roots; 41, storage bucket; 42, main pipe; 421, main valve; 43, branch pipe; 431, branch valve; 44, discharge node group; 441, soil node near the top of the main root; 442, soil node near the middle of the main root; 443, soil node near the tail of the main root; 444, soil node near the middle of the lateral root; 445, soil node near the tail of the lateral root; 5, plant; 51, branch and leaf area; 52, main root area; 53, bifurcation area. Detailed implementation manners

[0038] To facilitate the understanding of the technical solution of the present invention by those skilled in the art, the technical solution of the present invention will be further described below with reference to the accompanying drawings of the specification.

[0039] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0040] Embodiment 1

[0041] Refer to Figure 1 , this embodiment discloses a device for measuring the influence of pollutants at specific positions in the soil on plant roots, including a plant planting area 1, a root growth area 2, a root scanning area 3, and a pollution stress area 4 at specific parts of the soil near the plant roots.

[0042] The plant planting area 1 includes a planting box 11, a water injection port 12, and a light source 13. The planting box 11 is a funnel-shaped box with a large upper opening and a small lower opening. A light source 13 with its light directed towards the inside of the planting box 11 is fixed on the top wall of the planting box 11. Specifically, a lamp tube is fixed on the top wall of the planting box 11 by bolts. A water injection port 12 is provided on the side wall of the planting box 11. A spray nozzle is embedded in the water injection port 12. The spray nozzle is connected to a water source through a water inlet pipe.

[0043] The spray nozzle is preferably a fog-type spray nozzle, so that the plants receive water evenly.

[0044] The root growth area 2 includes a growth box 21, a soil inlet 22, and a sealing door 23. The growth box 21 is fixed to the bottom opening of the planting box 11, and the bottom opening of the planting box 11 is communicated with the top opening of the growth box 21. A soil inlet 22 is provided on the outer side of the growth box 21, and nutrient soil is buried into the growth box 21 through the soil inlet 22. A sealing door 23 is rotatably connected to one side edge of the soil inlet 22 by a hinge. The sealing door 23 is used in cooperation with the soil inlet 22 to close or open the soil inlet 22.

[0045] The root scanning area 3 includes a transparent scanning box. The scanning box is placed horizontally, and one end is communicated with the bottom of the growth box 21. A layer of soil with a thickness not exceeding 2 cm is laid in the scanning box.

[0046] The specific part pollution stress area 4 near the plant roots includes a storage barrel 41, a main pipe 42, and branch pipes 43. A single or multiple composite pollutants are placed in the storage barrel 41. The main pipe 42 is welded to the bottom of the storage barrel 41. A plurality of branch pipes 43 are connected to the main pipe 42 through tees. The nozzles of the branch pipes 43 are inserted into the scanning box, and the nozzles are arranged at the discharge nodes around the roots of the plant 5.

[0047] A main valve 421 for controlling the opening and closing of the main path of the main pipe 42 is installed on the main pipe 42. A branch valve 431 for controlling the opening and closing of the branch pipe 43 is fixed to the branch pipe 43 by bolts.

[0048] The main pipe 42 slopes downward from the connection end near the storage barrel 41 towards the other end, facilitating the output of pollutants.

[0049] The nozzle of the branch pipe 43 is connected to a needle-shaped drip irrigation device.

[0050] The device for measuring the influence of pollutants at specific positions in the soil on plant roots contains a plant 5. The plant 5 includes a foliage area 51, a main root area 52, and a bifurcation area 53 connected in sequence. The foliage area 51 is distributed in the planting box 11. The main root area 52 is inserted into the nutrient soil in the growth box 21. The bifurcation area 53 extends towards the scanning box and, under the action of the plant growth habit, the bifurcation area 53 grows towards the bottom of the scanning box. The bifurcation area 53 includes a main root and lateral roots. A plurality of lateral roots grow on the main root.

[0051] The working principle of this embodiment is as follows: Nutrient soil is buried into the device through the soil burial inlet 22, and then plants are planted in the planting box 11. The foliage area 51 of the plant 5 grows upward above the planting box 11, the main root area 52 penetrates into the growth box 21, and the forking area 53 grows along the horizontally placed scanning box. When studying the dynamic effects of environmental pollutants on the root system, through the main valve 421 and the sub-valve 431, single or compound pollutants are applied from the storage barrel 41 along the main pipe 42 and the branch pipe 43 to the plant root system once or multiple times, continuously or intermittently, and at different root positions. The operation is simple, and there is no need to pull up and plant the plants multiple times. When the plant root system grows towards the root scanning area 3, under the action of its own weight, it grows downward. Since the soil thickness does not exceed 2 cm, the plant root system grows along the bottom of the root scanning area 3, and then is scanned or observed through the transparent bottom of the root scanning area 3 to record data, which simplifies the operation and brings great convenience to the experiment.

[0052] Embodiment Two

[0053] Refer to Figure 2 In this Embodiment Two, which is different from Embodiment One, the specific part pollution stress area 4 of the soil near the plant root system further includes a discharge node group 44. The discharge node group 44 includes a soil node 441 near the top of the main root, a soil node 442 near the middle of the main root, a soil node 443 near the tail of the main root, a soil node 444 near the middle of the lateral root, and a soil node 445 near the tail of the lateral root, all of which are located in the scanning box. The soil node 441 near the top of the main root, the soil node 442 near the middle of the main root, and the soil node 443 near the tail of the main root are successively arranged in the soil near the head, middle, and tail of the main root in the forking area 53. The soil node 444 near the middle of the lateral root and the soil node 445 near the tail of the lateral root are distributed in the soil near the middle and tail of the lateral root in the forking area 53. The soil node 442 near the middle of the main root, the soil node 443 near the tail of the main root, the soil node 444 near the middle of the lateral root, and the soil node 445 near the tail of the lateral root all correspond to the pipe orifices of the branch pipe 43 one by one.

[0054] Experimental Scheme One

[0055] A method for measuring the effects of pollutants at specific soil positions on plant root systems includes the following steps:

[0056] S1 Add nutrient soil with a thickness not exceeding 2 cm into the root scanning area through the soil burial inlet, and add nutrient soil into the growth box. Bury the plant seeds into the nutrient soil.

[0057] S2 Close the sealing door, turn on the light source, add water regularly. Let the plants grow for a period of time until they break through the soil, the branches and leaves grow into the planting box, and the roots extend towards the root scanning area.

[0058] S3 Select a single pollutant. Specifically, select the pollutant of antimony element and add it into the storage bucket;

[0059] S4 At a specific part of the plant, such as the middle position of the main root, open the sub-valve corresponding to the branch pipe near the middle of the main root, and add 3 ml of antimony with a concentration of 100 μg / L all at once through a needle-shaped drip irrigation device (the structure is similar to that of a hanging bottle, a pipe, and a pipe control valve);

[0060] S5 After 2 - 3 days, use a scanner to scan the root system of the plant in the root system scanning area;

[0061] S6 Measure the root system indexes. Specifically, observe and measure the main root length, main root width, root width, number of root branches, lateral root length, and lateral root width on the scanned image;

[0062] S7 Analyze the influence of the pollutant on the dynamics of the plant root system.

[0063] Experimental scheme two

[0064] Different from experimental scheme one, in S3, select multiple composite pollutants. Specifically, select the mixed pollutant of pesticide and antimony.

[0065] Experimental scheme three

[0066] Different from experimental scheme one, in S4, add it every 2 days, for a total of 3 times, and each time add 1 ml of antimony with a concentration of 100 μg / L.

[0067] Experimental scheme four

[0068] Different from experimental scheme three, in S4, select a needle-shaped drip irrigation device with a gradually narrowing outlet, and under the action of gravity, continuously and uninterruptedly drip the pollutant onto the plant root system.

[0069] Through multiple experimental schemes, study the influence of environmental pollutants on plant root systems from multiple angles, including the types of pollutants themselves, the positions of plant root systems, the number of times of pollutant application, and the interval duration of pollutant application, so as to improve the accuracy of the research.

[0070] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention, and any reference signs in the claims should not be regarded as limiting the claimed rights.

[0071] The above-described embodiments merely represent the implementation manners of the invention. The protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention.

Claims

1. Device for measuring the impact of soil pollutants at specific locations on plant roots, characterized in that: it includes a plant planting area, a root growth area, a root scanning area, and a pollution stress area for specific parts of the soil near the plant roots; one side of the root growth area is connected to the horizontally placed and transparent root scanning area; the outlet of the pollution stress area for specific parts of the soil near the plant roots is inserted into a specific part of the soil near the plant roots in the root scanning area; the inlet of the pollution stress area for specific parts of the soil near the plant roots is outside the root scanning area; the plant planting area is erected on top of the root growth area; the specific parts of the soil near the plant roots include the soil near the top, middle, and bottom of the main root of the plant roots, the soil near the middle and bottom of each lateral root; the root scanning area includes a transparent scanning box; the scanning box is horizontally placed and one end is connected to the root growth area; the pollution stress area for specific parts of the soil near the plant roots includes a storage bucket, a main pipe, and branch pipes; the bottom of the storage bucket is connected to the main pipe; a plurality of branch pipes are connected to the main pipe; the nozzles of the branch pipes are inserted into specific parts of the root scanning area set by the research plan; the nozzle of the branch pipe is connected to a needle-shaped drip irrigation device; the needle-shaped drip irrigation device is arranged at the discharge nodes around the plant roots; a main valve for controlling the opening and closing of the main path of the main pipe is installed on the main pipe; a branch valve for controlling the opening and closing of the branch pipe is fixed on the branch pipe by bolts.

2. The device for measuring the impact of soil pollutants at specific locations on plant roots according to claim 1, characterized in that: the plant planting area includes a planting box, a water injection port, and a light source; the planting box is a funnel-shaped box with a large upper opening and a small lower opening; a light source with the light directed towards the inside of the planting box is fixed on the top wall of the planting box; a water injection port is opened on the side wall of the planting box; a spray nozzle is embedded in the water injection port; the spray nozzle is connected to a water source through a water inlet pipe.

3. The device for measuring the impact of soil pollutants at specific locations on plant roots according to claim 1, characterized in that: the root growth area includes a growth box, a soil burial opening, and a sealing door; the growth box is fixed at the bottom opening of the plant planting area; and the plant planting area is communicated with the top opening of the growth box; a soil burial opening is opened on the outer side of the growth box; nutrient soil is buried into the growth box through the soil burial opening; a sealing door is rotatably connected to one side of the soil burial opening by a hinge; the sealing door is used in cooperation with the soil burial opening to close or open the soil burial opening.

4. The device for measuring the impact of soil pollutants at specific locations on plant roots according to claim 1, characterized in that: a layer of soil with a thickness not exceeding 2 cm is laid in the scanning box.

5. The device for measuring the impact of soil pollutants at specific locations on plant roots according to claim 1, characterized in that: a single or multiple composite pollutants are placed in the storage bucket.

6. The device for measuring the impact of soil pollutants at specific locations on plant roots according to claim 5, characterized in that: The specific part pollution stress area of the soil near the plant roots further includes a discharge node group; the discharge node group includes soil nodes near the top of the main root, soil nodes near the middle of the main root, soil nodes near the tail of the main root, soil nodes near the middle of the lateral root, and soil nodes near the tail of the lateral root, all of which are within the scanning box; the soil nodes near the top of the main root, the soil nodes near the middle of the main root, and the soil nodes near the tail of the main root are successively arranged in the soil near the head, middle, and tail of the main root in the bifurcation area; the soil nodes near the middle of the lateral root and the soil nodes near the tail of the lateral root are distributed in the soil near the middle and the tail of the lateral root in the bifurcation area; the soil nodes near the middle of the main root, the soil nodes near the tail of the main root, the soil nodes near the middle of the lateral root, and the soil nodes near the tail of the lateral root all correspond one by one to the nozzles of the branch pipes.

7. The method for using the device for measuring the influence of pollutants at specific positions in soil on plant roots according to claim 2, characterized in that: it includes the following steps: The device for measuring the influence of pollutants at specific positions in soil on plant roots contains a plant; the plant includes a branch and leaf area, a main root area, and a bifurcation area connected in sequence; the branch and leaf area is distributed in the plant planting area; the main root area is inserted into the nutrient soil in the root growth area; the bifurcation area extends towards the root scanning area and, under the action of the plant growth habit, the bifurcation area grows towards the bottom of the root scanning area; the bifurcation area includes a main root and lateral roots; multiple lateral roots grow on the main root; S1 Add nutrient soil with a thickness not exceeding 2 cm to the root scanning area, and add nutrient soil to the root growth area, and bury the plant seeds in the nutrient soil. S2 The plant grows for a period of time, breaks through the soil, and the branch and leaf area grows into the plant planting area. Provide light and water to the plant in the plant planting area, and the main root area extends towards the root scanning area to form a bifurcation area. S3 Select pollutants and add them to the specific part pollution stress area of the soil near the plant roots. S4 At the middle position of the main root in the bifurcation area of the plant, open the channel corresponding to the specific part pollution stress area of the soil near the plant roots corresponding to the middle of the main root, and the pollutants enter the middle position of the main root through the channel. S5 After 2 - 3 days, use a scanner to scan the root situation of the plant in the root scanning area. S6 Measure the root indexes, specifically observe and measure the main root length, main root width, root width, number of root branches, lateral root length, and lateral root width on the scanned image. S7 Analyze the influence of the pollutants on the dynamics of the plant roots.

8. The method for using the device for measuring the influence of pollutants at specific positions in soil on plant roots according to claim 7, characterized in that: In S3, select multiple composite pollutants, specifically select the mixed pollutants of pesticides and antimony.

9. The method for using the device for measuring the influence of pollutants at specific positions in soil on plant roots according to claim 7, characterized in that: In S4, add it every 2 days, a total of 3 times, and each time add 1 ml of antimony with a concentration of 100 μg / L.

10. The method for using the device for measuring the influence of pollutants at specific positions in soil on plant roots according to claim 7, characterized in that: In S4, a needle-shaped drip irrigation device with an increasingly narrow outlet is selected, and under the action of gravity, pollutants are continuously dripped onto the plant roots without interruption.

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