Erosive soil nutrient loss path traceability sampling method and device

Abstract

According to the eroded soil nutrient loss path traceability sampling method, multiple sets of positioning seats 15 are fixed to a sampling seat 13 at the end, away from an end 11, of a sampling main pipe 1, positioning grooves 31 formed in the outer side of a sampling end 3 are matched with the positioning seats 15 in size, and the sections of the positioning grooves 31 and the positioning seats 15 are both trapezoidal; a fixed bolt penetrates through a slotted hole 14 in the positioning seat 15 and is screwed into a screwed hole in the bottom of the positioning groove 31, so that the sampling seat 13 and the sampling end 3 are stably positioned and mounted, and the sampling seat 13 and the sampling end 3 are accurately positioned and mounted through multi-point stratified sampling along the slope gradient of an erosion area, a water flow path and different landform units in combination with the nutrient content and physicochemical property analysis of the collected sample. And accurate tracing of the nutrient loss path of the eroded soil is realized.

Description

Technical Field

[0001] This invention relates to the field of soil testing equipment, specifically to a method and apparatus for tracing the source of nutrient loss in eroded soil. Background Technology

[0002] When using a sampling shovel to trace the source of nutrient loss in eroded soil, it is necessary to conduct multi-point stratified sampling along the slope gradient, water flow path, and different geomorphic units in the erosion area based on the spatial distribution characteristics of soil erosion and nutrient migration patterns. Focus should be placed on collecting soil samples from the erosion gully walls, runoff collection areas, and deposition areas. By analyzing the content, form, and spatial variation characteristics of nutrients such as nitrogen, phosphorus, and potassium in the soil at different sampling points, combined with the physicochemical properties such as soil particle composition and bulk density, the loss paths of nutrients with slope runoff, interflow, or sediment transport can be traced to identify key areas and dominant migration modes of nutrient loss, providing data support for the development of targeted soil nutrient loss prevention and control measures.

[0003] As the core component that directly contacts the soil, the sampling blade at the end of the sampling shovel is prone to rolling due to frequent friction and collision with hard materials such as soil particles and gravel during long-term use. This defect will cause the sharpness of the sampling blade to decrease significantly, making it unable to quickly cut into the deep soil layer. This not only increases the difficulty and labor intensity of sampling, but also renders the entire sampling device unusable. Summary of the Invention

[0004] The purpose of this invention is to provide a method and apparatus for tracing the source of nutrient loss in eroded soil, so as to solve the problems mentioned in the background art.

[0005] A sampling method for tracing the source of nutrient loss in eroded soil is characterized by the following: During sampling, the operator holds the "T"-shaped handles on both sides of the end of the sampling tube, aligns the device with the target sampling point in the eroded area, and cuts into the soil through multiple sets of sampling blades at the bottom of the sampling end, utilizing the sharp structure of the sampling blades to achieve rapid soil sample collection; multiple positioning seats are fixed on the sampling seat at the end of the sampling tube furthest from the end, and the positioning groove on the outer side of the sampling end is adapted to the size of the positioning seat, and both have trapezoidal cross-sections. After the positioning seat is inserted into the positioning groove, the fixing bolt passes through the slot hole on the positioning seat and is screwed into the screw hole at the bottom of the positioning groove to achieve stable positioning and installation of the sampling seat and the sampling end; by multi-point stratified sampling along the slope gradient, water flow path and different geomorphic units of the eroded area, combined with the analysis of the nutrient content and physicochemical properties of the collected samples, the source of nutrient loss in eroded soil can be accurately traced.

[0006] To achieve the above objectives, a sampling device for tracing the path of nutrient loss in eroded soil is provided, including a sampling main tube, a fixed seat inside the sampling main tube, and a spring fixed on the side wall of the fixed seat. The end of the spring is connected to a connecting tube. A sampling end is installed at the bottom of the sampling main tube, and multiple sets of sampling blades are provided at the bottom of the sampling end. A positioning groove is opened on the outer side of the sampling end.

[0007] Furthermore, the sampling tube is fixed with a head at its end, and handles are provided on both sides of the head. The handles and the sampling tube are arranged in a "T" shape.

[0008] Furthermore, a sampling seat is fixed at the end of the sampling tube away from the end head, and multiple sets of positioning seats are fixed on the sampling seat, with slots provided on the positioning seats.

[0009] Furthermore, a positioning groove is provided on one side of the positioning seat, and the size of the positioning seat is adapted to the positioning groove, and the positioning seat is inserted into the inside of the positioning groove.

[0010] Furthermore, the bottom of the positioning groove is provided with a screw hole, which is connected to the slot on the positioning seat. At the same time, the fixing bolt passes through the slot and is screwed into the inside of the screw hole.

[0011] Furthermore, the cross-sections of the positioning seat and the positioning groove are both trapezoidal, and the sampling seat and the sampling end are positioned and installed through multiple sets of positioning seats and positioning grooves.

[0012] Furthermore, a limiting channel is provided inside the sampling seat, and a connecting pipe is inserted inside this limiting channel. A push head is fixed at the end of the connecting pipe and is placed inside the sampling end. The push head is conical.

[0013] Furthermore, a locking handle is fixed to the end of the connecting pipe, and the locking handle is inserted into a limiting opening on the side wall of the sampling main pipe. The locking handle is cylindrical. Beneficial effects

[0014] 1. In this solution, the sampling base and the sampling end are connected by a trapezoidal insertion of a positioning base and a positioning slot, and a fixing bolt passing through the slot and screw hole to achieve a detachable fixed connection. This allows the sampling end, where the sampling blade, which is the core contact component, is located, to be disassembled and replaced individually. This effectively solves the problem that traditional sampling shovels cannot be replaced individually after the sampling blade becomes worn due to long-term friction and collision with soil particles and gravel, leading to the scrapping of the entire device. When the sampling blade becomes worn and its sharpness decreases, it is not necessary to replace the entire sampling device. Only the fixing bolt needs to be removed, the worn sampling end can be removed from the positioning base, and a new sampling end with a good sampling blade can be replaced for reuse. This not only reduces the cost of equipment use but also avoids waste of resources.

[0015] 2. After sampling is completed, the spring returns to its original position and rebounds. The connecting pipe drives the pusher head to move along the inside of the sampling end. Utilizing the guiding and squeezing action of the conical structure, the soil sample collected inside the sampling end is quickly and completely pushed out, avoiding sample residue inside the sampling end that is difficult to clean. This ensures the purity of each sample and prevents residual samples from mixing with newly collected samples, which could affect the accuracy of the test results. At the same time, the conical pusher head design reduces damage to the soil sample structure during the pushing process, ensuring the authenticity of the sample's physicochemical properties and nutrient content. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a bottom view of the structure of the present invention; Figure 3 This is an exploded view of the structure of the present invention; Figure 4 This is an assembly diagram of the structure of the present invention; Figure 5 The structure of this invention Figure 4 Side view; Figure 6 This is a schematic diagram of the locking handle and limiting port of the present invention.

[0017] The following are the labels in the diagram: 1. Sampling main tube; 11. End; 12. Handle; 13. Sampling seat; 14. Slot; 15. Positioning seat; 2. Fixed seat; 21. Spring; 22. Connecting tube; 221. Locking handle; 222. Limiting port; 23. Push head; 3. Sampling end; 31. Positioning slot; 32. Sampling blade. Detailed Implementation

[0018] Please see Figures 1-6 The present invention provides a sampling device for tracing the path of nutrient loss in eroded soil, including a sampling main tube 1, a fixed seat 2 inside the sampling main tube 1, and a spring 21 fixed on the side wall of the fixed seat 2. The end of the spring 21 is connected to a connecting tube 22. A sampling end 3 is installed at the bottom of the sampling main tube 1, and multiple sets of sampling blades 32 are provided at the bottom of the sampling end 3. A positioning groove 31 is opened on the outer side of the sampling end 3.

[0019] In a preferred embodiment, the sampling tube 1 is fixed with a head 11 at one end, and handles 12 are provided on both sides of the head 11. The handles 12 and the sampling tube 1 are distributed in a "T" shape.

[0020] A sampling seat 13 is fixed at the end of the sampling main tube 1 away from the end 11, and multiple sets of positioning seats 15 are fixed on the sampling seat 13, with slots 14 opened on the positioning seats 15.

[0021] The positioning seat 15 has a positioning groove 31 on one side, and the positioning seat 15 and the positioning groove 31 are matched in size. The positioning seat 15 is inserted into the inside of the positioning groove 31.

[0022] The bottom of the positioning groove 31 is provided with a screw hole, and the screw hole is connected to the slot 14 on the positioning seat 15. At the same time, the fixing bolt passes through the slot 14 and is screwed and fixed inside the screw hole.

[0023] Both the positioning seat 15 and the positioning groove 31 have trapezoidal cross sections, and the sampling seat 13 and the sampling end 3 are positioned and installed through multiple sets of positioning seats 15 and positioning grooves 31.

[0024] A locking handle 221 is fixed to the end of the connecting pipe 22, and the locking handle 221 is inserted into the limiting port 222 opened on the side wall of the sampling main pipe 1. The locking handle 221 is cylindrical.

[0025] During sampling, the operator holds the handles 12, which are distributed in a "T" shape on both sides of the end 11 of the sampling tube 1, and aligns the device with the target sampling point in the erosion area. Multiple sets of sampling blades 32 at the bottom of the sampling end 3 cut into the soil, and the sharp structure of the sampling blades 32 is used to achieve rapid collection of soil samples. Multiple sets of positioning seats 15 are fixed on the sampling seat 13 at the end of the sampling tube 1 away from the end 11. The positioning groove 31 on the outside of the sampling end 3 is adapted to the size of the positioning seat 15 and both of them have trapezoidal cross sections. After the positioning seat 15 is inserted into the positioning groove 31, the fixing bolt passes through the slot hole 14 on the positioning seat 15 and is screwed into the screw hole at the bottom of the positioning groove 31, so as to achieve stable positioning and installation of the sampling seat 13 and the sampling end 3. By sampling at multiple points in layers along the slope gradient, water flow path and different geomorphic units of the erosion area, and combining the nutrient content and physicochemical properties analysis of the collected samples, the source of nutrient loss in the eroded soil can be accurately traced. The trapezoidal positioning seat 15 and positioning groove 31 are fixed with bolts, which greatly improves the connection stability between the sampling seat 13 and the sampling end 3 and avoids loosening and displacement during the sampling process. The design of multiple sampling blades 32 enhances the soil cutting ability and reduces the sampling difficulty. The detachable installation design of the sampling end 3 facilitates the replacement and maintenance of the sampling blades 32 and avoids the entire device becoming unusable due to the damage of a single component. By collecting soil samples from different areas, reliable sample support is provided for tracing the source of nutrient loss in eroded soil, and the accuracy and scientific nature of the source tracing results are improved.

[0026] like Figure 1-4As shown: The sampling base 13 and the sampling end 3 are connected by a trapezoidal insertion of the positioning base 15 and the positioning groove 31, and a fixing bolt passing through the groove hole 14 and the screw hole to achieve a detachable fixed connection. This allows the sampling end 3, where the sampling blade 32, which is the core contact component, is located, to be disassembled and replaced separately. This effectively solves the problem that the sampling blade of the traditional sampling shovel becomes worn after long-term friction and collision with soil particles and gravel, and cannot be replaced separately, leading to the scrapping of the entire device. When the sampling blade 32 becomes worn and its sharpness decreases, it is not necessary to replace the entire sampling device. Only the fixing bolt needs to be removed, the worn sampling end 3 can be removed from the positioning base 15, and a new sampling end 3 with a good sampling blade 32 can be replaced and put back into use. This not only reduces the cost of equipment use and avoids waste of resources, but also reduces sampling interruptions caused by the replacement of the entire device. The trapezoidal positioning seat 15 is bolted to the positioning groove 31 to ensure the connection stability of the sampling end 3 after installation, and to prevent uneven force on the sampling blade 32 due to loosening during the sampling process, which would accelerate wear. In a preferred embodiment, a limiting channel is provided inside the sampling seat 13, and a connecting pipe 22 is inserted inside the limiting channel. A push head 23 is fixed at the end of the connecting pipe 22 and is placed inside the sampling end 3. The push head 23 is conical.

[0027] like Figure 1-2 As shown: The limiting channel inside the sampling seat 13 provides stable installation and movement guidance for the connecting pipe 22, ensuring that the connecting pipe 22 moves along a fixed trajectory inside the sampling main pipe 1, avoiding deviation that would cause the push head 23 to not fit tightly against the inside of the sampling end 3; the conical push head 23 fixed at the end of the connecting pipe 22 is placed inside the sampling end 3. During the sampling process, the sampling end 3 is inserted into the soil, and the soil squeezes the push head 23 inside the sampling end 3, causing the push head 23 to move upward and squeeze the spring 21. After sampling is completed, the locking handle 221 is held to pull the sampling end 3 out from the ground. Releasing the locking handle 221 causes the spring 21 to reset and rebound, and the connecting pipe 22 drives the push head 23 to move along the inside of the sampling end 3. The cone-shaped pusher 23, utilizing its guiding and squeezing action, quickly and completely ejects the soil sample collected from the sampling end 3, preventing sample residue from remaining inside the sampling end 3 and making it difficult to clean. This ensures the purity of each sample and avoids the mixing of residual samples with newly collected samples, which could affect the accuracy of the test results. At the same time, the cone-shaped pusher 23 design reduces damage to the soil sample structure during the pushing process, ensuring the authenticity of the sample's physicochemical properties and nutrient content. Combined with the elastic reset function of the spring 21 inside the sampling main tube 1, the pusher 23 can quickly return to its initial position after pushing the sample, facilitating subsequent sampling operations and significantly improving sampling efficiency and sample collection reliability. This provides more accurate sample support for tracing the source of nutrient loss in eroded soil.

Claims

1. A method for tracing the source of nutrient loss from eroded soil, characterized by: During sampling, the operator holds the "T"-shaped handles on both sides of the sampling tube end, aligns the device with the target sampling point in the erosion area, and uses multiple sets of sampling blades at the bottom of the sampling tube to cut into the soil, utilizing the sharp structure of the sampling blades to achieve rapid soil sample collection. Multiple positioning seats are fixed on the sampling base at the end of the sampling tube furthest from the end. The positioning groove on the outside of the sampling tube is adapted to the size of the positioning seat, and both have trapezoidal cross-sections. After the positioning seat is inserted into the positioning groove, the fixing bolt passes through the slot hole on the positioning seat and is screwed into the screw hole at the bottom of the positioning groove, achieving stable positioning and installation of the sampling base and sampling tube. By sampling at multiple points along the slope gradient, water flow path, and different geomorphic units of the erosion area, combined with the analysis of the nutrient content and physicochemical properties of the collected samples, the precise source tracing of nutrient loss from eroded soil can be achieved.

2. A soil nutrient loss tracing sampling device for the method of claim 1, comprising a sampling main pipe (1), characterized in that: The sampling main tube (1) is provided with a fixed seat (2) inside, and a spring (21) is fixed on the side wall of the fixed seat (2). The end of the spring (21) is connected to a connecting tube (22). A sampling end (3) is installed at the bottom of the sampling main tube (1), and multiple sets of sampling blades (32) are provided at the bottom of the sampling end (3). A positioning groove (31) is opened on the outside of the sampling end (3).

3. The soil nutrient loss tracing sampling device according to claim 2, characterized in that: The sampling tube (1) is fixed with an end head (11), and handles (12) are provided on both sides of the end head (11). The handles (12) and the sampling tube (1) are arranged in a "T" shape. A sampling seat (13) is fixed at the end of the sampling tube (1) away from the end head (11), and multiple sets of positioning seats (15) are fixed on the sampling seat (13). The positioning seat (15) is provided with slots (14).

4. The soil nutrient loss tracing sampling device according to claim 3, characterized in that: The positioning seat (15) has a positioning groove (31) on one side, and the positioning seat (15) and the positioning groove (31) are adapted to each other in size. The positioning seat (15) is inserted into the inside of the positioning groove (31).

5. The soil nutrient loss tracing sampling device according to claim 4, characterized in that: The bottom of the positioning groove (31) is provided with a screw hole, and the screw hole is connected to the slot (14) on the positioning seat (15). At the same time, the fixing bolt passes through the slot (14) and is screwed and fixed inside the screw hole.

6. The soil nutrient loss tracing sampling device according to claim 5, characterized in that: The cross-sections of the positioning seat (15) and the positioning groove (31) are both trapezoidal, and the sampling seat (13) and the sampling end (3) are positioned and installed through multiple sets of positioning seats (15) and positioning grooves (31).

7. The soil nutrient loss tracing sampling device according to claim 6, characterized in that: The sampling seat (13) has a limiting channel inside, and a connecting pipe (22) is inserted inside the limiting channel. A pusher (23) is fixed at the end of the connecting pipe (22), and the pusher (23) is placed inside the sampling end (3). The pusher (23) is conical.

8. The soil nutrient loss tracing sampling device according to claim 7, characterized in that: The end of the connecting pipe (22) is fixed with a locking handle (221), and the locking handle (221) is inserted into the limiting port (222) opened on the side wall of the sampling pipe (1). The locking handle (221) is cylindrical.

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