A test device for the effect of mycorrhizal fungi on soil leaching and its use method

Abstract

The present invention relates to the technical field of arbuscular mycorrhizal fungi test, and specifically to a test device for the influence of mycorrhizal fungi on soil leaching and a method for using the same, comprising a sampling tube and a partition tube that perform vertical linear motion, wherein the sampling tube is sleeved on the partition tube, and at least two sampling parts are arranged in the sampling tube at equal intervals along its axial direction, wherein the sampling part comprises a sampling port, wherein the sampling port can abut against the outer circumferential surface of the partition tube, and wherein a loosening part is arranged at the bottom of the partition tube, wherein the loosening part comprises an annular loosening rope, and after the sampling tube and the partition tube are inserted into the soil, the partition tube moves upward, and the loosening part can loosen the soil inside the partition tube. The beneficial effect of the present invention is that through the arrangement of the sampling tube and the partition tube, when the soil is subjected to a leaching test, the test device can be directly inserted into the soil, thereby avoiding moving the soil, which causes changes in the original internal structure of the soil and the temperature and humidity of the environment in which it is located.

Description

Technical Field

[0001] The invention relates to the technical field of arbuscular mycorrhizal fungi experiments, and in particular to an experimental device for the influence of mycorrhizal fungi on soil leaching and a use method thereof. Background Art

[0002] Arbuscular mycorrhizal fungi can help plant production and are important microorganisms in the soil. Arbuscular mycorrhizal fungi can form a symbiotic growth body with 90% of the plants in the biological world. When arbuscular mycorrhizal fungi form a symbiotic growth body with the root system of the host plant, they can branch in the soil to form a huge root hyphae network. At present, the main research directions in the study of arbuscular mycorrhizal fungi are the effects of arbuscular mycorrhizal fungi on improving plant nutrient absorption and plant stress resistance, as well as the morphology of soil pollutants and the migration of pollutants in plant systems. However, there are few studies on whether arbuscular mycorrhizal fungi affect soil leaching. In order to strengthen research in this area, deepen the understanding of arbuscular mycorrhizal fungi in ecology, and provide a theoretical basis for in-depth research, it is necessary to strengthen the impact of arbuscular mycorrhizal fungi on soil leaching. However, due to the fact that arbuscular mycorrhizal fungi form a symbiotic growth body with plants, it is difficult to distinguish the effects of plant roots and arbuscular mycorrhizal fungi hyphae on soil leaching.

[0003] Therefore, an experimental device for the effect of mycorrhizal fungi on soil leaching is needed to solve the above problems. Summary of the invention

[0004] In order to solve the above-mentioned problem, that is, in order to solve the problem of needing to deepen the effect of arbuscular mycorrhizal fungi on soil leaching, the present invention provides a test device for the effect of arbuscular mycorrhizal fungi on soil leaching, comprising a sampling tube and a partition tube that perform vertical linear motion, the sampling tube being sleeved on the partition tube, at least two sampling parts being arranged at equal intervals in the sampling tube along its axial direction, the sampling part comprising a sampling port that can abut against the outer circumferential surface of the partition tube, a loosening part being arranged at the bottom of the partition tube, the loosening part comprising an annular loosening rope, after the sampling tube and the partition tube are inserted into the soil, the partition tube moves upward, and the loosening part can loosen the soil inside the partition tube.

[0005] Preferably, the bottom of the sampling barrel is provided with at least two bottom sampling parts evenly arranged along the circumferential direction, the bottom sampling part includes an arc-shaped sampling rod, the sampling rod rotates on a horizontal plane, a sampling hole is provided on the top surface of the sampling rod, and an arc-shaped mounting groove with an opening toward the axial direction of the sampling barrel is provided in the sampling barrel, and the cross-section of the arc-shaped mounting groove is larger than the cross-section of the sampling rod.

[0006] Preferably, the bottom surface of the sampling rod is an inclined surface, and the inclined surface is inclined from a lower side in the axial direction away from the sampling cylinder to an upper side in the axial direction close to the sampling cylinder.

[0007] Preferably, six sampling parts are arranged on the sampling barrel at equal intervals along the axial direction thereof, and the sampling parts include four sampling grooves evenly arranged on the sampling barrel along the circumferential direction, and the sampling port is connected to the sampling grooves.

[0008] Preferably, the top ends of the sampling tube and the partition tube are commonly connected with a rotating part, and the outer circumferential surface of the sampling tube is fixedly connected with a spiral blade.

[0009] Preferably, the partition cylinder includes a cylinder body, a cover body arranged at the top of the cylinder body, a liquid outlet portion is arranged on the lower side of the cover body, the liquid outlet portion includes a liquid storage pan, the liquid storage pan can abut against the inner wall of the partition cylinder, and four liquid outlet pipes are evenly connected and arranged at the bottom of the liquid storage pan along the circumferential direction.

[0010] Preferably, an auxiliary sampling part is provided on the cover body, and the auxiliary sampling part includes an air blowing pipe arranged on the lower side of the cover body, a plurality of air holes are opened at the bottom of the air blowing pipe, and an air bag is provided on the upper side of the cover body, and the air bag is connected to the air blowing pipe. When the partition tube moves upward, the air bag is compressed.

[0011] Preferably, the rotating part is arranged on the top plate, and the bottom matrix of the top plate is provided with four adjustment parts, and the adjustment part includes an electric push rod, and the bottom spherical hinge of the electric push rod is provided with a support plate, and the four adjustment parts are electrically connected to a controller, and the controller controls the telescopic length of the electric push rod to ensure that the sampling tube is perpendicular to the ground.

[0012] Preferably, the bottom end of the sampling cylinder is an inclined surface inclined from an upper side away from the axis of the sampling cylinder to a lower side close to the axis of the sampling cylinder.

[0013] Preferably, filters are provided in both the sampling port and the sampling hole.

[0014] In addition, the present invention also provides a method for using a test device for the effect of mycorrhizal fungi on soil leaching, comprising the following steps:

[0015] S1: Place the device on the soil plane, and adjust the device through the adjustment part so that the sampling tube is perpendicular to the soil plane;

[0016] S2: insert the sampling tube and the partition tube into the soil and start the rotating part at the same time;

[0017] S3: Start the liquid outlet part and inject water into the soil through the liquid outlet pipe;

[0018] S4: Move the partition cylinder upward and rotate the sampling rod;

[0019] S5: After sampling is completed, reset the sampling rod and move the sampling tube upward.

[0020] The beneficial effects of the present invention are:

[0021] 1. Through the arrangement of the sampling tube and the partition tube, when the soil is subjected to a leaching test, the test device can be directly inserted into the soil to avoid moving the soil, which would change the original internal structure of the soil and the temperature and humidity of the environment in which it is located; at the same time, through the abutment arrangement of the sampling port and the partition tube, during the insertion of the sampling tube into the soil, the soil solution at a shallow depth is prevented from entering the sampling part, which would cause inaccurate test data; through the arrangement of the partition tube and the loosening part, after the sampling tube stops being inserted into the soil, the partition tube drives the loosening part to move upward, opens the sampling port, and allows the soil solution to enter the sampling part, while driving the loosening part to transport the soil on the inner side of the partition tube that has become tight due to the insertion of the sampling tube and the partition tube, thereby preventing the soil that has become tight due to the insertion of the sampling tube and the partition tube from affecting the flow of the soil solution.

[0022] 2. Through the setting of the rotating part and the spiral blade, the sampling tube and the partition tube can rotate during the insertion of the soil. The rotation can drive the spiral blade to rotate, which is conducive to the sampling tube and the partition tube entering the soil.

[0023] 3. By setting the adjustment part, before sampling, the sampling tube is first kept vertical to the soil plane to ensure the accuracy of the sampling tube when sampling soil solutions at different depths, thereby improving the accuracy of the test.

[0024] 4. Through the arrangement of the arc-shaped sampling rod and the mounting groove, the sampling rod can be hidden in the mounting groove during the insertion of the sampling tube into the soil, and the sampling hole in the sampling rod can abut against the upper side wall of the mounting groove, so as to prevent the soil solution from entering the sampling hole during the insertion of the sampling tube into the soil. When the sampling tube stops moving, the rotating part can drive the sampling rod to rotate inside the sampling tube to sample the soil solution at the bottom of the test soil, so as to make the sampling range wider. At the same time, through the intermittent downward movement of the sampling tube, the four sampling rods can sample the soil cross sections at different depths, so as to further improve the sampling range.

[0025] 5. By setting the bottom surface of the sampling rod in an inclined manner, the soil moves downward when the sampling rod rotates into the sampling tube, thereby preventing the soil on the upper side of the sampling rod from becoming compacted due to the insertion of the sampling rod, thereby affecting the flow of the soil solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a test device for the influence of mycorrhizal fungi on soil leaching;

[0027] Figure 2This is a right view of an experimental device for the effect of mycorrhizal fungi on soil leaching;

[0028] Figure 3 It is an isometric cross-sectional view at AA of an experimental device for the effect of mycorrhizal fungi on soil leaching;

[0029] Figure 4 It is an isometric cross-sectional view at BB of an experimental device for the effect of mycorrhizal fungi on soil leaching;

[0030] Figure 5 A test device for the effect of mycorrhizal fungi on soil leaching Figure 3 A partial enlarged view of point C in the middle;

[0031] Figure 6 It is a front view of a test device for the effect of mycorrhizal fungi on soil leaching;

[0032] Figure 7 It is an isometric cross-sectional view at DD of an experimental device for the effect of mycorrhizal fungi on soil leaching;

[0033] Figure 8 It is an isometric cross-sectional view at EE of an experimental device for the effect of mycorrhizal fungi on soil leaching;

[0034] Fig. 9 A test device for the effect of mycorrhizal fungi on soil leaching Figure 7 A partial enlarged view of point F in the middle.

[0035] In the figure:

[0036] 1. Sampling tube;

[0037] 2. Partition tube; 21. Cylinder body; 22. Cover body;

[0038] 3. Sampling part; 31. Sampling port; 32. Sampling slot; 33. Sample outlet tube; 34. Closing cover;

[0039] 4. Soil loosening part; 41. Soil loosening rope; 42. Opening slot; 43. Articulated seat; 44. Rotating rod;

[0040] 5. Bottom sampling part; 51. Sampling rod; 52. Sampling hole; 53. Rotating part; 531. Sampling motor;

[0041] 6. Mounting slot;

[0042] 7. Rotating part; 71. Rotating motor; 72. Rotating disk;

[0043] 8. Spiral blades;

[0044] 9. liquid outlet; 91. liquid storage tray; 92. liquid outlet pipe; 93. liquid storage tank; 94. pump body; 95. third electric telescopic rod;

[0045] 10. Auxiliary sampling part; 101. Air blowing tube; 102. Air hole; 103. Air bag; 104. Telescopic tube; 105. First one-way valve; 106. Second one-way valve;

[0046] 11. Top plate;

[0047] 12. adjustment part; 121. electric push rod; 122. support plate;

[0048] 13. filter element; 14. first electric telescopic rod; 15. second electric telescopic rod; 16. weight reduction groove. DETAILED DESCRIPTION

[0049] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0050] See also Figures 1 to 9 The embodiment of the present invention discloses an experimental device for the influence of mycorrhizal fungi on soil leaching, comprising a sampling tube 1 and a partition tube 2 that perform vertical linear motion, the sampling tube 1 is sleeved on the partition tube 2, at least two sampling parts 3 are arranged at equal intervals in the sampling tube 1 along its axial direction, the sampling part 3 includes a sampling port 31, the sampling port 31 can abut against the outer circumferential surface of the partition tube 2, a loosening part 4 is arranged at the bottom of the partition tube 2, the loosening part 4 includes an annular loosening rope 41, after the sampling tube 1 and the partition tube 2 are inserted into the soil, the partition tube 2 moves upward, and the loosening part 4 can loosen the soil inside the partition tube 2.

[0051] Specifically, when sampling, the sampling tube 1 and the partition tube 2 make vertical linear motion and are inserted into the soil. Then the partition tube 2 moves upward and breaks away from the abutment with the sampling port 31. At the same time, the upward movement of the partition tube 2 drives the loosening part 4 to move upward, and the annular loosening rope 41 in the loosening part 4 loosens the soil inside the partition tube 2.

[0052] By setting the sampling tube 1 and the partition tube 2, when the soil is subjected to a leaching test, the test device can be directly inserted into the soil to avoid moving the soil, which would change the original internal structure of the soil and the temperature and humidity of the environment in which it is located; at the same time, by the abutment setting of the sampling port 31 and the partition tube 2, the sampling tube 1 can avoid the soil solution at a shallow depth from entering the sampling part 3 during the insertion of the sampling tube 1 into the soil, which would cause inaccurate test data; by setting the partition tube 2 and the loosening part 4, after the sampling tube 1 stops being inserted into the soil, the partition tube 2 drives the loosening part 4 to move upward, opens the sampling port 31, and allows the soil solution to enter the sampling part 3, while driving the loosening part 4 to transport the soil on the inside of the partition tube 2 that has become tight due to the insertion of the sampling tube 1 and the partition tube 2, thereby avoiding the soil that has become tight due to the insertion of the sampling tube 1 and the partition tube 2 affecting the flow of the soil solution.

[0053] like Figure 3 , 5 As shown, the loosening part 4 includes an opening groove 42 opened at the bottom of the partition tube 2 and facing the axial direction of the partition tube 2. The upper side wall of the opening groove 42 is evenly and fixedly connected with six hinge seats 43 along the circumferential direction. A rotating rod 44 is hinged on each hinge seat 43. A flip motor is fixedly connected to each hinge seat 43. The output end of the flip motor can drive the rotating rod 44 to rotate. The loosening rope 41 passes through the six rotating rods 44, and the loosening rope 41 is made of annular elastic material.

[0054] Specifically, when the partition tube 2 moves upward, the flip motor drives the rotating rod 44 to rotate, and the rotating rod 44 rotates toward the inside of the partition tube 2, driving the loosening rope 41 to move toward the inside of the partition tube 2. When the partition tube 2 moves upward, the loosening rope 41 contacts the soil to loosen the soil.

[0055] like Figure 1 , 3 As shown, the top ends of the sampling tube 1 and the partition tube 2 are commonly connected with a rotating part 7 , the outer circumferential surface of the sampling tube 1 is fixedly connected with a spiral blade 8 , and the rotating part 7 is arranged on the top plate 11 .

[0056] Furthermore, the rotating part 7 includes a rotating motor 71 fixedly connected to the upper side of the top plate 11 , the output end of the rotating motor 71 extends downward through the top plate 11 , and the lower end of the output end of the rotating motor 71 is fixedly connected to a rotating disk 72 .

[0057] Furthermore, two first electric telescopic rods 14 are symmetrically fixedly connected to the upper end of the sampling tube 1, and the first electric telescopic rods 14 are fixedly connected to the rotating disk 72; two second electric telescopic rods 15 are symmetrically fixedly connected to the upper end of the partition tube 2, and the second electric telescopic rods 15 are fixedly connected to the rotating disk 72.

[0058] Specifically, when the sampling tube 1 and the partition tube 2 need to move, the first electric telescopic rod 14 and the second electric telescopic rod 15 are started to drive the sampling tube 1 and the partition tube 2 to move up and down. When the sampling tube 1 and the partition tube 2 need to be inserted into the soil, the rotating motor 71 is started, and the output end of the starter motor 71 drives the rotating disk 72 to rotate. The rotating disk 72 drives the sampling tube 1 and the partition tube 2 to rotate through the first electric telescopic rod 14 and the second electric telescopic rod 15, and the sampling tube 1 drives the spiral blade 8 to rotate.

[0059] By setting the rotating part 7 and the spiral blade 8, the sampling tube 1 and the partition tube 2 can rotate during the insertion into the soil, and the spiral blade 8 can be driven to rotate at the same time, which is conducive to the sampling tube 1 and the partition tube 2 entering the soil.

[0060] like Figure 1 , 3 As shown, the bottom matrix of the top plate 11 is provided with four adjustment parts 12, and the adjustment part 12 includes an electric push rod 121, and the bottom spherical hinge of the electric push rod 121 is provided with a support plate 122, and the four adjustment parts 12 are electrically connected to a controller, and the controller controls the telescopic length of the electric push rod 121 to ensure that the sampling tube 1 is perpendicular to the ground.

[0061] Specifically, when a soil leaching test is required, the device is placed on a soil plane, and the four support plates 122 are in contact with the soil plane. According to different soil types, the four support plates 122 are tilted to different degrees under the action of four spherical hinges, so that the device is placed stably on the soil plane. After that, the controller controls the telescopic length of the four electric push rods 121 by detecting the horizontality of the entire device, so that the sampling tube 1 is perpendicular to the ground.

[0062] By setting the adjustment part 12, before sampling, the sampling tube 1 is first kept vertical to the soil plane to ensure the accuracy of the sampling tube 1 when sampling soil solutions at different depths, thereby improving the accuracy of the test.

[0063] like Figure 4 , 5 As shown, at least two bottom sampling parts 5 are evenly arranged along the circumferential direction at the bottom of the sampling tube 1, and the bottom sampling part 5 includes an arc-shaped sampling rod 51, which rotates on a horizontal plane, and a sampling hole 52 is provided on the top surface of the sampling rod 51. The sampling tube 1 is provided with an arc-shaped mounting groove 6 with an opening toward the axial direction of the sampling tube 1, and the cross-section of the arc-shaped mounting groove 6 is larger than the cross-section of the sampling rod 51.

[0064] Furthermore, four bottom sampling parts 5 are evenly arranged along the circumferential direction at the bottom of the sampling tube 1, the arc-shaped mounting groove 6 is a through groove penetrating the sampling tube 1, the bottom sampling part 5 includes a rotating member 53 connected to the sampling rod 51, the rotating member 53 includes a sampling motor 531 fixedly connected to the lower side wall of the arc-shaped mounting groove 6, and the output end of the sampling motor 531 extends upward to penetrate the sampling rod 51; the sampling rod 51 is a hollow structure, and the top surface of the sampling rod 51 is evenly spaced along the circumferential direction. The sampling holes 52 can abut against the upper side wall of the mounting groove 6, each sampling hole 52 is evenly connected to the internal hollow structure of the sampling rod 51, and a filter element 13 is fixedly connected to each sampling hole 52, and the filter element 13 is a filter net.

[0065] It should be noted that the filter element 13 includes but is not limited to a filter mesh structure, and also includes a solid-liquid separation membrane and other structures that can allow liquid to pass through.

[0066] Specifically, when the sampling tube 1 stops moving after being inserted into the soil, the sampling motor 531 is started, and the output end of the sampling motor 531 drives the sampling rod 51 to rotate, and the sampling rod 51 is rotated into the interior of the sampling tube 1; at the same time, the sampling tube 1 can move downward intermittently, and when the sampling tube 1 stops moving, one of the sampling rods 51 is rotated to sample the cross section of the sampled soil.

[0067] By setting the arc-shaped sampling rod 51 and the mounting groove 6, the sampling rod 51 can be hidden in the mounting groove 6 during the insertion of the sampling tube 1 into the soil, and the sampling hole 52 in the sampling rod 51 can abut against the upper side wall of the mounting groove 6, so as to prevent the soil solution from entering the sampling hole 52 during the insertion of the sampling tube 1 into the soil. When the sampling tube 1 stops moving, the rotating member 53 can drive the sampling rod 51 to rotate inside the sampling tube 1 to sample the soil solution at the bottom of the test soil, so as to expand the sampling range. At the same time, through the intermittent downward movement of the sampling tube 1, the four sampling rods 51 can sample the soil cross sections at different depths, so as to further improve the sampling range.

[0068] like Figure 4 , 5 As shown, the bottom surface of the sampling rod 51 is an inclined surface, and the inclined surface is inclined from the lower side in the axial direction away from the sampling tube 1 to the upper side in the axial direction close to the sampling tube 1.

[0069] By setting the bottom surface of the sampling rod 51 to be inclined, the soil moves downward when the sampling rod 51 rotates into the sampling tube 1, thereby preventing the soil on the upper side of the sampling rod 51 from becoming compacted due to the insertion of the sampling rod 51 and affecting the flow of the soil solution.

[0070] like Figure 1 , 3As shown in FIGS. 8 and 9 , six sampling parts 3 are arranged on the sampling tube 1 at equal intervals along the axial direction thereof. The sampling part 3 includes four sampling grooves 32 evenly arranged on the sampling tube 1 along the circumferential direction. The sampling port 31 is connected to the sampling grooves 32 .

[0071] Furthermore, the sampling tube 1 is provided with a plurality of weight-reducing grooves 16 which penetrate the sampling tube 1. A weight-reducing groove 16 is provided on the upper side of each sampling groove 32. The weight-reducing groove 16 is not connected to the sampling groove 32. A sample outlet tube 33 is provided on the upper side wall of each sampling groove 32. Each sample outlet tube 33 extends upward into the weight-reducing groove 16. A closing cover 34 is threadedly connected to the upper end of the sample outlet tube 33. A filter element is provided in the sampling port 31.

[0072] It should be noted that the filter element 13 includes but is not limited to a filter mesh structure, and also includes a solid-liquid separation membrane and other structures that can allow liquid to pass through.

[0073] Specifically, when the sampling tube 1 stops moving, the partition tube 2 moves upward, so that the sampling port 31 contacts the soil, and the soil solution enters the sampling groove 32 through the sampling port 31. After the sampling is completed, when the sampling tube 1 is pulled out of the soil, the closing cover 34 is opened, and the soil solution in the sampling groove 32 is taken out through the sample outlet tube 33.

[0074] By providing six sampling parts 3 along the axial direction of the sampling tube 1 and the sampling grooves 32 in each sampling part 3, soil solutions in different directions and at different depths can be sampled, making the sampling more comprehensive and reducing the test error. At the same time, by providing the weight-reducing grooves 16, the dead weight of the sampling tube 1 is reduced. At the same time, by providing the sample outlet tube 33, the discharge of the sampled liquid is facilitated.

[0075] like Figure 3 As shown, the partition tube 2 includes a cylinder body 21, a cover body 22 arranged at the top of the cylinder body 21, a liquid outlet 9 is arranged on the lower side of the cover body 22, and the liquid outlet 9 includes a liquid storage pan 91, the liquid storage pan 91 can abut against the inner wall of the partition tube 2, and four liquid outlet pipes 92 are evenly connected and arranged at the bottom of the liquid storage pan 91 along the circumferential direction.

[0076] Furthermore, the second electric telescopic rod 15 is fixedly connected to the cover body 22, and the liquid outlet part 9 includes a pump body 94 fixedly connected to the upper side of the cover body 22, the upper input end of the pump body 94 is connected to a liquid storage tank 93, and the lower output end of the pump body 94 passes through the cover body 22, and the lower output end of the pump body 94 can be connected to the liquid storage pan 91; two third electric telescopic rods 95 are symmetrically fixedly connected to the upper end of the liquid storage pan 91, and the third electric telescopic rods 95 extend upward, pass through the cover body 22 and are fixedly connected to the rotating disk 72.

[0077] Specifically, when the partition tube 2 moves downward, the third electric telescopic rod 95 extends, driving the liquid storage pan 91 to move downward. When the partition tube 2 stops moving downward, the liquid outlet pipe 92 is inserted into the soil, and the pump body 94 is started. The pump body 94 fills the aqueous solution in the liquid storage tank 93 into the liquid storage pan 91, and the liquid in the liquid storage pan 91 flows into the soil through the liquid outlet pipe 92; when the partition tube 2 moves upward, the third electric telescopic rod 95 is stationary, so that the circumferential edge of the liquid storage pan 91 slides against the inner wall of the partition tube 2 to scrape the inner wall of the partition tube 2.

[0078] By setting the liquid outlet 9, water can be injected into the soil, and by setting the liquid storage tray 91, the inner wall of the partition tube 2 can be scraped to prevent the inner wall of the partition tube 2 from being adhered to by soil and affecting the next use, while facilitating the drainage of the liquid in the liquid storage tray 91.

[0079] like Figure 2 , 7 As shown, an auxiliary sampling part 10 is provided on the cover body 22, and the auxiliary sampling part 10 includes an air blowing tube 101 arranged on the lower side of the cover body 22, and a plurality of air holes 102 are opened at the bottom of the air blowing tube 101. An air bag 103 is provided on the upper side of the cover body 22, and the air bag 103 is connected with the air blowing tube 101. When the partition tube 2 moves upward, the air bag 103 is compressed.

[0080] Furthermore, two airbags 103 are symmetrically arranged on the upper side of the cover body 22, the air blowing tube 101 is fixedly connected to the liquid storage pan 91, the airbag 103 is connected to the air blowing tube 101 through the telescopic tube 104, a first one-way valve 105 is arranged in the telescopic tube 104, gas can only enter the telescopic tube 104 from the airbag 103 through the first one-way valve 105, the upper end of the airbag 103 is connected to the outside world and a second one-way valve 106 is arranged, gas can only enter the airbag 103 from the outside world through the second one-way valve 106.

[0081] Specifically, when the partition tube 2 moves upward, the air bag 103 is compressed, and the gas in the air bag 103 enters the air blowing pipe 101 through the telescopic tube 104 and then enters the soil through the air hole 102.

[0082] By setting the airbag 103, the gas in the airbag 103 enters the air blowing tube 101 through the telescopic tube 104, and then enters the soil through the air hole 102, assisting the flow of the soil solution at the bottom of the sampled soil, so that it can quickly enter the sampling part 3.

[0083] like Figure 3 As shown, the bottom end of the sampling tube 1 is an inclined surface that inclines from the upper side away from the axis of the sampling tube 1 to the lower side close to the axis of the sampling tube 1 .

[0084] The inclined surface at the bottom of the sampling tube 1 facilitates the insertion of the sampling tube 1 into the soil.

[0085] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0086] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0088] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A test device for the effect of mycorrhizal fungi on soil leaching, characterized in that: The invention comprises a sampling tube (1) and a partition tube (2) which can perform vertical linear motion, wherein the sampling tube (1) is sleeved on the partition tube (2), and at least two sampling parts (3) are arranged in the sampling tube (1) at equal intervals along the axial direction thereof, and the sampling part (3) comprises a sampling port (31), and the sampling port (31) can abut against the outer circumferential surface of the partition tube (2), and a loosening part (4) is arranged at the bottom of the partition tube (2), and the loosening part (4) comprises an annular loosening rope (41), and after the sampling tube (1) and the partition tube (2) are inserted into the soil, the partition tube (2) moves upward, and the loosening part (4) can loosen the soil inside the partition tube (2); The bottom of the sampling tube (1) is provided with at least two bottom sampling parts (5) evenly arranged along the circumferential direction, the bottom sampling part (5) comprises an arc-shaped sampling rod (51), the sampling rod (51) performs a rotational motion on a horizontal plane, a sampling hole (52) is provided on the top surface of the sampling rod (51), the sampling tube (1) is provided with an arc-shaped installation groove (6) with an opening facing the axial direction of the sampling tube (1), and the cross section of the arc-shaped installation groove (6) is larger than the cross section of the sampling rod (51); The bottom surface of the sampling rod (51) is an inclined surface, and the inclined surface is inclined from the lower side away from the axial direction of the sampling tube (1) to the upper side close to the axial direction of the sampling tube (1); The loosening part (4) comprises an opening groove (42) which is opened at the bottom of the partition tube (2) and faces the axis direction of the partition tube (2); the upper side wall of the opening groove (42) is evenly and fixedly connected with six hinge seats (43) along the circumferential direction; each hinge seat (43) is hinged with a rotating rod (44); each hinge seat (43) is fixedly connected with a turning motor; the output end of the turning motor can drive the rotating rod (44) to rotate; the loosening rope (41) passes through the six rotating rods (44); the loosening rope (41) is made of an annular elastic material; The outer circumferential surface of the sampling tube (1) is fixedly connected with a spiral blade (8).

2. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 1, characterized in that: The sampling tube (1) is provided with six sampling parts (3) at equal intervals along its axial direction. The sampling part (3) comprises four sampling grooves (32) evenly arranged on the sampling tube (1) along the circumferential direction. The sampling port (31) is connected to the sampling grooves (32).

3. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 2, characterized in that: The top ends of the sampling tube (1) and the partition tube (2) are commonly connected with a rotating part (7).

4. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 3, characterized in that: The partition tube (2) comprises a cylinder (21), a cover body (22) arranged at the top end of the cylinder (21), a liquid outlet (9) being arranged at the lower side of the cover body (22), the liquid outlet (9) comprising a liquid storage pan (91), the liquid storage pan (91) being capable of abutting against the inner wall of the partition tube (2), and four liquid outlet pipes (92) being evenly connected and arranged at the bottom of the liquid storage pan (91) along a circumferential direction.

5. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 4, characterized in that: An auxiliary sampling portion (10) is provided on the cover body (22), and the auxiliary sampling portion (10) comprises an air blowing pipe (101) provided on the lower side of the cover body (22), a plurality of air holes (102) are provided at the bottom of the air blowing pipe (101), and an air bag (103) is provided on the upper side of the cover body (22), and the air bag (103) is connected to the air blowing pipe (101), and when the partition tube (2) moves upward, the air bag (103) is compressed.

6. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 5, characterized in that: The rotating part (7) is arranged on the top plate (11), and the bottom surface matrix of the top plate (11) is provided with four adjustment parts (12), and the adjustment part (12) includes an electric push rod (121), and the bottom of the electric push rod (121) is spherically hinged with a support plate (122), and the four adjustment parts (12) are electrically connected to a controller, and the controller controls the telescopic length of the electric push rod (121) to ensure that the sampling tube (1) is perpendicular to the ground.

7. The test device for the effect of mycorrhizal fungi on soil leaching according to claim 6, characterized in that: The bottom end of the sampling cylinder (1) is an inclined surface that slopes from an upper side away from the axis of the sampling cylinder (1) to a lower side close to the axis of the sampling cylinder (1).

8. A method for using a test device for the effect of mycorrhizal fungi on soil leaching, comprising the test device for the effect of mycorrhizal fungi on soil leaching as claimed in claim 7, characterized in that: The following steps are involved: S1: placing the device on a soil plane, and adjusting the device through an adjustment part (12) so that the sampling tube (1) is perpendicular to the soil plane; S2: inserting the sampling tube (1) and the partition tube (2) into the soil and starting the rotating part (7); S3: starting the liquid outlet part (9) to inject water into the soil through the liquid outlet pipe (92); S4: Move the partition cylinder (2) upward and rotate the sampling rod (51); S5: After sampling is completed, the sampling rod (51) is reset and the sampling tube (1) is moved upward.

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