Device and method for conveniently measuring and collecting rhizosphere soil of poplar under water flooding

Abstract

The device comprises a base plate, a fixing mechanism is arranged on the base plate, a first through hole is formed in the base plate, an outer cylinder is fixedly connected into the first through hole, an air inlet is formed in the outer cylinder, the air inlet is communicated with an air pump, a guide sleeve is fixedly connected into the outer cylinder, and the guide sleeve is fixedly connected with the outer cylinder. The bottom of the outer cylinder is fixedly connected with a rubber skirt; the bottom surface of the rubber skirt is fixedly connected with a plurality of sealing rings; the sampling assembly comprises an inner cylinder and a sampling cylinder, the inner cylinder is slidably connected into the guide sleeve, the sampling cylinder is slidably connected into the inner cylinder, a straight rod is arranged on the sampling cylinder, a bottom plate is fixedly connected to the inner cylinder, a power mechanism is arranged on the bottom plate, the power mechanism is in transmission connection with the straight rod, and a cutting mechanism is arranged on the sampling cylinder; a plurality of holding rods are fixedly connected to the bottom plate, and a connecting mechanism is arranged on the base plate. The rhizosphere soil collecting device can collect rhizosphere soil in water, can reduce the influence of water on a soil sample, and is more convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of sampling devices, in particular to a device and method for collecting soil for measuring rhizosphere soil of flooded poplar trees. Background Art

[0002] With the advancement of ecological restoration and forestry research, poplars, due to their rapid growth and waterlogging tolerance, have become a key tree species for ecological reconstruction in wetlands, tidal flats, and riparian zones. Research on the physical and chemical properties, enzyme activity, and microbial community structure of poplar rhizosphere soil, the core area of ​​interaction between roots and microorganisms, is crucial for revealing the species' stress resistance mechanisms and optimizing cultivation techniques.

[0003] However, in some seasonally flooded areas every year, it is difficult to measure the physical and chemical properties of the soil, including microorganisms. The reason is that the surface soil becomes muddy due to being soaked by rainwater, which makes it difficult to collect samples. In addition, conventional samplers are prone to buoyancy interference in flooded environments, making it inconvenient to sample, and are easily mixed with upper water bodies during the sampling process, causing sample dilution or contamination.

[0004] Therefore, a device and method for collecting soil for measuring rhizosphere soil of flooded poplar trees are proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for collecting soil from the rhizosphere of poplar trees under flooding, so as to solve the problems existing in the above-mentioned prior art and to collect rhizosphere soil even in a flooded environment.

[0006] To achieve the above object, the present invention provides the following solution: The present invention provides a device for collecting soil from the rhizosphere of flooded poplar trees, comprising:

[0007] A base plate, wherein a fixing mechanism is provided on the base plate, a first through hole is formed on the base plate, an outer cylinder is fixedly connected in the first through hole, an air inlet is formed on the outer cylinder, the air inlet is connected to an air pump, a guide sleeve is fixedly connected in the outer cylinder, a rubber skirt is fixedly connected to the bottom of the outer cylinder, and a plurality of sealing rings are fixedly connected to the bottom surface of the rubber skirt;

[0008] A sampling assembly includes an inner tube and a sampling tube, the inner tube is slidably connected to the guide sleeve, the sampling tube is slidably connected to the inner tube, a straight rod is provided on the sampling tube, a bottom plate is fixedly connected to the inner tube, a power mechanism is provided on the bottom plate, the power mechanism is transmission-connected to the straight rod, and a cutting mechanism is provided on the sampling tube; a plurality of grip rods are fixedly connected to the bottom plate, a connecting mechanism is provided on the base plate, and the connecting mechanism is detachably connected to the grip rod.

[0009] Preferably, the cutting mechanism includes a plurality of flexible knives, the top end of the sampling tube is fixedly connected to an upper sealing plate, a plurality of second through holes are provided on the upper sealing plate, a plurality of through slots are provided on the sampling tube, the top end of the through slot is communicated with the second through hole, the bottom end of the through slot is located on the side wall of the sampling tube, the flexible knife is located in the through slot, the top end of the flexible knife is fixedly connected to a first connecting rod, the first connecting rod extends out of the second through hole, the upper sealing plate is fixedly connected to a first pillar, the first pillar is fixedly connected to a top plate, the bottom surface of the top plate is fixedly connected to a plurality of first electric telescopic rods, the output end of the first electric telescopic rod is fixedly connected to the first connecting rod, and the straight rod is fixedly connected to the top plate.

[0010] Preferably, the power mechanism includes several frames, the frames are slidably arranged on the base plate, a support mechanism is movably arranged in the frame, two second electric telescopic rods are fixedly connected in the frame, the second electric telescopic rods are fixedly connected to the bottom surface and the top surface of the frame, the two second electric telescopic rods are arranged correspondingly, and a pressing mechanism is movably arranged on the support mechanism, one end of the pressing mechanism is transmission connected to the straight rod, and the other end of the pressing mechanism is transmission connected to the second electric telescopic rod.

[0011] Preferably, the supporting mechanism includes a first slide groove, the first slide groove is fixedly connected in the frame, a first slider is slidably connected in the first slide groove, a first motor is fixedly connected in the frame, a first threaded rod is rotatably connected in the slide groove, a first threaded hole is provided on the first slider, the first threaded rod is threadedly connected in the threaded hole, a lifting mechanism is fixedly connected to the first slider, and the pressing mechanism is movably connected to the lifting mechanism.

[0012] Preferably, the lifting mechanism includes a second slide, the second slide is fixedly connected to the first slider, a second slider is slidably connected in the second slide, a fixed shaft is fixedly connected to the second slider, the fixed shaft extends out of the second slide, a second motor is fixedly connected to the second slide, a second threaded rod is rotatably connected in the second slide, a second threaded hole is provided on the second slider, the second threaded rod is threadedly connected in the second threaded hole, the output shaft of the second motor is fixedly connected to the second threaded rod, and the pressing mechanism is movably connected to the fixed shaft.

[0013] Preferably, the pushing mechanism includes an elastic pushing rod, a third through hole is provided on the elastic pushing rod, the fixed shaft is passed through the third through hole, one end of the elastic pushing rod is rotatably connected to a connecting plate 1, a push plate is fixedly connected to the connecting plate 1, the other end of the elastic pushing rod is fixedly connected to two electromagnets, the electromagnets are located on the upper end surface and the lower end surface of the pushing rod, the output end of the second electric telescopic rod is fixedly connected to a metal plate, the push plate is fixedly connected to a first rack, and a plurality of second racks are fixedly connected to the straight rod, and the first rack and the second rack are meshed.

[0014] Preferably, the elastic pushing rod includes a rod body, a cavity and a fourth through hole are provided on the rod body, the cavity and the fourth through hole are communicated, a movable rod is inserted into the fourth through hole, a limiting block is fixedly connected to the cavity, a spring is placed in the cavity, one end of the spring abuts against the limiting block, and the other end of the spring abuts against the cavity, the third through hole is provided on the rod body, and the connecting plate is rotatably connected to the movable rod.

[0015] Preferably, the connecting mechanism includes a second connecting plate, which is fixedly connected to the base plate, a third connecting plate rotatably connected to the second connecting plate, a rubber ring fixedly connected to the third connecting plate, and the rubber ring is detachably connected to the handle.

[0016] Preferably, the fixing mechanism includes a plurality of drill rods, the bottom ends of the drill rods are fixedly connected with spiral pieces, the base plate is provided with a plurality of through holes, the drill rods are passed through the through holes, a stop block is fixed to the top end of the drill rods, and a handle is fixedly connected to the stop block.

[0017] A soil collection method for measuring rhizosphere soil of flooded poplar trees comprises the following steps:

[0018] Step 1: Place the base plate in water, start the air pump, and let air flow into the outer tube through the air pump. Slowly press the base plate downwards so that the rubber skirt at the bottom of the outer tube contacts the mud at the bottom of the water. As the outer tube moves downwards, the internal airflow will drain the water out of the outer tube.

[0019] Step 2: fix the substrate to the bottom of the water using a fixing mechanism;

[0020] Step 3: Use the handle to press down the bottom plate to move the inner tube downward until it reaches the lowest point, and then connect it to the handle using the connecting mechanism;

[0021] Step 4: The straight rod is driven downward by the power mechanism, and the straight rod drives the sampling tube downward, so that the sampling tube is inserted into the underwater soil for sampling. When the sampling tube is completely inserted into the underwater soil, the cutting mechanism is used to cut off the soil inside the sampling tube from the soil outside;

[0022] Step 5: Lift the sampling tube through the power mechanism, undo the connection between the connecting mechanism and the gripping rod, and lift the inner tube until the inner tube is removed from the outer tube.

[0023] The present invention discloses the following technical effects: in this device, the fixing mechanism is used to fix the base plate, the outer tube is used to isolate water, the rubber skirt is used to fit with the mud on the bottom of the water, and gas is blown into the outer tube by an air pump to discharge the water in the outer tube. In the process of inflating the outer tube and pressing down the base plate, the sealing ring can increase the sealing performance between the rubber skirt and the mud on the bottom of the water. When the rubber skirt contacts the mud on the bottom of the water and the water in the outer tube is basically discharged, the fixing mechanism is used to fix the base plate on the mud on the bottom of the water; the guide sleeve facilitates the inner The tube moves within the outer tube, and the sampling tube is used to be inserted into the soil for sampling. The power mechanism is used to drive the straight rod. The movement of the straight rod allows the sampling tube to be inserted into the soil or pulled out of the soil. The cutting mechanism is used to separate the soil inside the sampling tube from the external soil. When cutting the soil sample, the cutting mechanism only needs to create a disconnection area between the soil inside the sampling tube and the external soil to prevent the internal sample soil from being sucked out when the sampling tube is lifted. After the sampling tube is sampled, the sampling tube is lifted into the inner tube, and then the inner tube is pulled out of the outer tube. The present invention can realize the collection of rhizosphere soil in water, while also reducing the impact of water on the soil sample, and is more convenient in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic diagram of the structure of the device for collecting soil from the rhizosphere of flooded poplar trees according to the present invention;

[0026] Figure 2 for Figure 1 The enlarged schematic diagram of point a in the middle;

[0027] Figure 3 for Figure 2 The enlarged schematic diagram at c in the middle;

[0028] Figure 4 for Figure 1 The enlarged schematic diagram at point b in the middle;

[0029] Figure 5 for Figure 4 The enlarged schematic diagram at point d in the middle;

[0030] Among them, 1, base plate; 2, outer tube; 3, air inlet; 4, guide sleeve; 5, rubber skirt; 6, sealing ring; 7, inner tube; 8, sampling tube; 9, straight rod; 10, bottom plate; 11, grip rod; 12, flexible knife; 13, upper sealing plate; 14, through groove; 15, first connecting rod; 16, first support; 17, top plate; 18, first electric telescopic rod; 19, frame; 20, second electric telescopic rod; 21, first slide; 22, first slider; 23, first motor; 24, first threaded rod; 2 5. Second slide; 26. Second slider; 27. Fixed shaft; 28. Second motor; 29. ​​Second threaded rod; 30. Pressing rod; 31. Connecting plate 1; 32. Push plate; 33. Electromagnet; 34. Metal plate; 35. First rack; 36. Second rack; 37. Third electric telescopic rod; 38. Dovetail groove; 39. Third slider; 40. Base; 41. Connecting plate 2; 42. Connecting plate 3; 43. Rubber ring; 44. Drill rod; 45. Spiral piece; 46. Stop block; 47. Handle. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1-5 The present invention provides a device for collecting soil from the rhizosphere of flooded poplar trees, comprising:

[0034] A base plate 1 is provided with a fixing mechanism. A first through hole is formed on the base plate 1. An outer tube 2 is fixedly connected to the first through hole. An air inlet 3 is formed on the outer tube 2. The air inlet 3 is connected to an air pump. A guide sleeve 4 is fixedly connected to the outer tube 2. A rubber skirt 5 is fixedly connected to the bottom of the outer tube 2. A plurality of sealing rings 6 are fixedly connected to the bottom surface of the rubber skirt 5.

[0035] The sampling assembly includes an inner tube 7 and a sampling tube 8. The inner tube 7 is slidably connected in the guide sleeve 4. The sampling tube 8 is slidably connected in the inner tube 7. A straight rod 9 is provided on the sampling tube 8. A bottom plate 10 is fixedly connected to the inner tube 7. A power mechanism is provided on the bottom plate 10. The power mechanism is transmission-connected to the straight rod 9. A cutting mechanism is provided on the sampling tube 8. Several grips 11 are fixedly connected to the bottom plate 10. A connecting mechanism is provided on the base plate 1. The connecting mechanism and the grip 11 are detachably connected.

[0036] In this device, a fixing mechanism is used to fix the base plate 1, the outer tube 2 is used to isolate water, and the rubber skirt 5 is used to fit the bottom soil. An air pump (not shown) blows air into the outer tube 2 through an air pipe, and the air is used to discharge the water in the outer tube 2. During the process of inflating the outer tube 2 and pressing down the base plate 1, the staff must assist in holding the rod 11 to prevent the inner tube 7 from being pushed out of the outer tube 2 by the air flow. The sealing ring 6 can enhance the sealing between the rubber skirt 5 and the bottom soil. After the rubber skirt 5 contacts the bottom soil and the water in the outer tube 2 is basically discharged, the fixing mechanism is used to fix the base plate 1 to the bottom soil.

[0037] The guide sleeve 4 facilitates the movement of the inner tube 7 in the outer tube 2. The sampling tube 8 is used to be inserted into the soil for sampling. The power mechanism is used to drive the straight rod 9. The straight rod 9 moves to insert the sampling tube 8 into the soil or to pull the sampling tube 8 out of the soil. The cutting mechanism is used to separate the soil in the sampling tube 8 from the external soil. When the cutting mechanism cuts off the soil sample, it only needs to make a disconnection area between the soil in the sampling tube 8 and the external soil to prevent the internal sample soil from being sucked out when the sampling tube 8 is lifted. When the sampling of the sampling tube 8 is completed, the sampling tube 8 is lifted into the inner tube 7, and then the inner tube 7 is pulled out of the outer tube 2.

[0038] A further optimized solution is provided, in which the cutting mechanism includes a number of flexible knives 12, and an upper sealing plate 13 is fixedly connected to the top of the sampling tube 8. A number of second through holes are provided on the upper sealing plate 13, and a number of through slots 14 are provided on the sampling tube 8. The top of the through slot 14 is connected to the second through hole, and the bottom of the through slot 14 is located on the side wall of the sampling tube 8. The flexible knife 12 is located in the through slot 14, and a first connecting rod 15 is fixedly connected to the top of the flexible knife 12. The first connecting rod 15 extends out of the second through hole, and a first pillar 16 is fixedly connected to the upper sealing plate 13. A top plate 17 is fixedly connected to the first pillar 16. A number of first electric telescopic rods 18 are fixedly connected to the bottom surface of the top plate 17. The output end of the first electric telescopic rod 18 is fixedly connected to the first connecting rod 15, and the straight rod 9 is fixedly connected to the top plate 17.

[0039] The first electric telescopic rod 18 extends or retracts, driving the first connecting rod 15 to rise or fall. When the sampling tube 8 is inserted into the soil to a specified depth, the first electric telescopic rod 18 is activated and extended. The first connecting rod 15 drives the flexible knife 12 to move downward and extend out of the through slot 14 to insert into the soil in the sampling tube 8. After the first electric telescopic rod 18 is extended to the desired depth, it is retracted, causing the flexible knife 12 to also retract into the through slot 14. After the soil sample in the sampling tube 8 has a gap separated, when the sampling tube 8 is raised, the soil sample is no longer easily sucked out. When using the flexible knife 12, use them one by one, and do not extend multiple flexible knives 12 at the same time to prevent collisions when multiple flexible knives 12 are extended at the same time. The upper sealing plate 13 is provided with an exhaust hole to facilitate exhaust during sampling. The exhaust hole is small.

[0040] To further optimize the solution, the power mechanism includes several frames 19, the frames 19 are slidably set on the base plate 10, and a support mechanism is movably provided in the frame 19. Two second electric telescopic rods 20 are fixedly connected to the frame 19, and the second electric telescopic rods 20 are fixedly connected to the bottom surface and the top surface of the frame 19. The two second electric telescopic rods 20 are arranged correspondingly, and a pressing mechanism is movably provided on the support mechanism. One end of the pressing mechanism is transmission connected to the straight rod 9, and the other end of the pressing mechanism is transmission connected to the second electric telescopic rod 20.

[0041] The support mechanism is used to support the pressing mechanism. The support mechanism can move within the frame 19 so that the position of the pressing mechanism can be adjusted. The second electric telescopic rod 20 drives the pressing mechanism to move, and the pressing mechanism drives the straight rod 9 to move to achieve the rise or fall of the straight rod 9.

[0042] To further optimize the solution, the supporting mechanism includes a first slide groove 21, the first slide groove 21 is fixedly connected in the frame 19, a first slider 22 is slidably connected in the first slide groove 21, a first motor 23 is fixedly connected in the frame 19, a first threaded rod 24 is rotatably connected in the slide groove, a first threaded hole is provided on the first slider 22, the first threaded rod 24 is threadedly connected in the threaded hole, a lifting mechanism is fixedly connected to the first slider 22, and the pressing mechanism is movably connected to the lifting mechanism.

[0043] The first motor 23 drives the first threaded rod 24 to rotate. When the first threaded rod 24 rotates, the first slider 22 moves, thereby realizing the movement of the lifting mechanism.

[0044] To further optimize the solution, the lifting mechanism includes a second slide 25, which is fixedly connected to the first slider 22, and a second slider 26 is slidably connected in the second slide 25. A fixed shaft 27 is fixedly connected to the second slider 26, and the fixed shaft 27 extends out of the second slide 25. A second motor 28 is fixedly connected to the second slide 25, and a second threaded rod 29 is rotatably connected in the second slide 25. A second threaded hole is provided on the second slider 26, and the second threaded rod 29 is threadedly connected in the second threaded hole. The output shaft of the second motor 28 is fixedly connected to the second threaded rod 29, and the pressing mechanism is movably connected to the fixed shaft 27.

[0045] The second motor 28 drives the second threaded rod (not shown in the figure) to rotate. When the second threaded rod (not shown in the figure) rotates, it will move the second slider (not shown in the figure). The second slider (not shown in the figure) drives the fixed shaft 27 to move up and down, thereby adjusting the position of the pressing mechanism.

[0046] To further optimize the solution, the pushing mechanism includes an elastic pushing rod 30, a third through hole is opened on the elastic pushing rod 30, the fixed shaft 27 is passed through the third through hole, one end of the elastic pushing rod 30 is rotatably connected to a connecting plate 31, and a push plate 32 is fixedly connected to the connecting plate 31, and the other end of the elastic pushing rod 30 is fixedly connected to two electromagnets 33, which are located on the upper and lower end surfaces of the elastic pushing rod 30, and the output end of the second electric telescopic rod 20 is fixedly connected to a metal plate 34, a first rack 35 is fixedly connected to the push plate 32, and a plurality of second racks 36 are fixedly connected to the straight rod 9, and the first rack 35 and the second rack 36 are meshed.

[0047] The fixed shaft 27 is passed through the third through hole, so that the elastic pressing rod 30 can rotate around the fixed shaft 27. When the electromagnet 33 is energized, it will be adsorbed together with the metal plate 34. When the second electric telescopic rod 20 is required to work, the electromagnet 33 connected thereto is energized. When the second electric telescopic rod 20 is extended, it will push the elastic pressing rod 30 to rotate. The other end of the elastic pressing rod 30 is rotatably connected to the push plate 32, and the push plate 32 will also move. When the first rack 35 is engaged with the second rack 36, the straight rod 9 moves up or down.

[0048] A further optimized solution is provided, in which the elastic pushing rod 30 includes a rod body 37, a cavity and a fourth through hole are provided on the rod body 37, the cavity and the fourth through hole are connected, a movable rod 38 is inserted into the fourth through hole, a limit block 39 is fixedly connected in the cavity, a spring 40 is placed in the cavity, one end of the spring 40 abuts against the limit block 39, and the other end of the spring 40 abuts against the cavity, a third through hole is provided on the rod body 37, and a connecting plate 31 is rotatably connected to the movable rod 38.

[0049] When the rod body 37 rotates, the distance between the rod body 37 and the straight rod 9 will become shorter, and the movable rod 38 will be compressed into the cavity inside the rod body 37. When one end of the rod body 37 rotates away from the straight rod 9, the spring 40 will cause the movable rod 38 to extend out of the cavity.

[0050] A further optimized solution is that the connecting mechanism includes a connecting plate 2 41, which is fixedly connected to the base plate 1, a connecting plate 3 42 is rotatably connected to the connecting plate 2 41, a rubber ring 43 is fixedly connected to the connecting plate 3 42, and the rubber ring 43 is detachably connected to the handle 11.

[0051] When the position of the base plate 10 needs to be fixed, the rubber ring 43 is put on the handle 11 .

[0052] A further optimized solution is that the fixing mechanism includes a plurality of drill rods 44, the bottom end of the drill rods 44 is fixedly connected to a spiral piece 45, a plurality of through holes are opened on the base plate 1, the drill rods 44 are passed through the through holes, a stop block 46 is fixed to the top end of the drill rods 44, and a handle 47 is fixedly connected to the stop block 46.

[0053] When the base plate 1 needs to be fixed, the worker rotates the handle 47 to make the spiral piece 45 at the bottom of the drill rod 44 enter the soil, thereby fixing the base plate 1.

[0054] A soil collection method for measuring rhizosphere soil of flooded poplar trees comprises the following steps:

[0055] Step 1: Place the substrate 1 in water, start the air pump, introduce gas into the outer tube 2 through the air pump, and slowly press the substrate 1 downward so that the rubber skirt 5 at the bottom of the outer tube 2 contacts the mud at the bottom of the water. The sealing ring 6 can increase the sealing between the rubber skirt 5 and the mud at the bottom of the water. In the process of pressing down the substrate 1, the staff should assist in holding the rod 11 to prevent the inner tube 7 from being pushed out of the outer tube 2 by the air flow. The exhaust hole on the upper sealing plate 13 does not affect the drainage of the outer tube 2. The air flow pressure provided by the air pump is sufficient to drain the water in the outer tube 2. The outer tube 2 is also in a pressure-maintaining state during the sampling process.

[0056] Step 2: After the rubber skirt 5 contacts the underwater soil and the water in the outer tube 2 is basically drained, the base plate 1 is fixed to the bottom of the water using a fixing mechanism. Specifically, the operator turns the handle 47 to make the spiral blade 45 at the bottom of the drill rod 44 enter the soil, thereby fixing the base plate 1;

[0057] Step 3: Use the handle 11 to press down the bottom plate 10, so that the inner tube 7 moves downward until it reaches the lowest point, and then connects it to the handle 11 using a connecting mechanism. The specific operation is to put the rubber ring 43 on the handle 11;

[0058] Step 4: During the sampling process, when the straight rod 9 needs to move downward, the electromagnet 33 below is energized, and the electromagnet 33 below is adsorbed together with the metal plate 34 on the second electric telescopic rod 20 below. Then the first motor 23 is started, and the first motor 23 drives the first threaded rod 24 to rotate. The first threaded rod 24 drives the first slider 22 and the second slide groove 25 to move toward the straight rod 9, so that the first rack 35 engages with the second rack 36, and the second electric telescopic rod 20 is started. The second electric telescopic rod 20 extends, and the second electric telescopic rod 20 pushes the electromagnet 33 and the rod body 37 below to move. The rod body 37 rotates around the fixed axis 27, and the movable rod at the other end of the rod body 37 is engaged. The movable rod 38 and the push plate 32 will rotate downward, and the straight rod 9 will move downward through the cooperation of the first rack 35 and the second rack 36. When the second electric telescopic rod 20 is extended into place, the first motor 23 rotates to move the first slider 22 and the second chute 25 away from the straight rod 9, thereby separating the first rack 35 and the second rack 36, and then retract the second electric telescopic rod 20. When the second electric telescopic rod 20 is retracted into place, the first motor 23 is started again to move the first slider 22 and the second chute 25 toward the straight rod 9 until the first rack 35 and the second rack 36 are engaged. The process of extending the second electric telescopic rod 20 is repeated, and the process of moving the straight rod 9 downward is repeated.

[0059] When the straight rod 9 needs to be moved up, the reverse operation is sufficient;

[0060] The straight rod 9 drives the sampling tube 8 downward, so that the sampling tube 8 is inserted into the underwater soil for sampling. When the sampling tube 8 is completely inserted into the underwater soil, the first electric telescopic rod 18 is activated and extended. The first connecting rod 15 drives the flexible knife 12 downward and extends out of the through slot 14 to be inserted into the soil in the sampling tube 8. After the first electric telescopic rod 18 is extended to the full extent, it is retracted, so that the flexible knife 12 is also retracted into the through slot 14. After the soil sample in the sampling tube 8 has a gap separated, when the sampling tube 8 is lifted, the soil sample is no longer easily sucked out.

[0061] Step 5: Lift the sampling tube 8 through the power mechanism, untie the connection between the rubber ring 43 and the gripping rod 11 , and lift the inner tube 7 until the inner tube 7 is taken out of the outer tube 2 .

[0062] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the invention.

Claims

1. A device for collecting soil from the rhizosphere of flooded poplar trees, characterized in that: include: A base plate (1), wherein a fixing mechanism is provided on the base plate (1), a first through hole is provided on the base plate (1), an outer cylinder (2) is fixedly connected in the first through hole, an air inlet (3) is provided on the outer cylinder (2), the air inlet (3) is connected to an air pump, a guide sleeve (4) is fixedly connected in the outer cylinder (2), a rubber skirt (5) is fixedly connected to the bottom of the outer cylinder (2), and a plurality of sealing rings (6) are fixedly connected to the bottom surface of the rubber skirt (5); A sampling assembly comprises an inner tube (7) and a sampling tube (8), wherein the inner tube (7) is slidably connected to the guide sleeve (4), and the sampling tube (8) is slidably connected to the inner tube (7). A straight rod (9) is provided on the sampling tube (8), and a bottom plate (10) is fixedly connected to the inner tube (7). A power mechanism is provided on the bottom plate (10), and the power mechanism is transmission-connected to the straight rod (9). A cutting mechanism is provided on the sampling tube (8); a plurality of gripping rods (11) are fixedly connected to the bottom plate (10), and a connecting mechanism is provided on the base plate (1), and the connecting mechanism is detachably connected to the gripping rod (11).

2. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 1, characterized in that: The cutting mechanism comprises a plurality of flexible knives (12), the top end of the sampling tube (8) is fixedly connected to an upper sealing plate (13), the upper sealing plate (13) is provided with a plurality of second through holes, the sampling tube (8) is provided with a plurality of through slots (14), the top end of the through slot (14) is communicated with the second through hole, the bottom end of the through slot (14) is located on the side wall of the sampling tube (8), the flexible knife (12) is located in the through slot (14), the top end of the flexible knife (12) is fixedly connected to a first connecting rod (15), the first connecting rod (15) extends out of the second through hole, the upper sealing plate (13) is fixedly connected to a first pillar (16), the first pillar (16) is fixedly connected to a top plate (17), the bottom surface of the top plate (17) is fixedly connected to a plurality of first electric telescopic rods (18), the output end of the first electric telescopic rod (18) is fixedly connected to the first connecting rod (15), and the straight rod (9) is fixedly connected to the top plate (17).

3. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 1, characterized in that: The power mechanism comprises a plurality of frames (19), the frames (19) being slidably arranged on the bottom plate (10), a support mechanism being movably arranged in the frames (19), two second electric telescopic rods (20) being fixedly connected in the frames (19), the second electric telescopic rods (20) being fixedly connected to the inner bottom surface and the inner top surface of the frames (19), the two second electric telescopic rods (20) being arranged correspondingly, a pressing mechanism being movably arranged on the support mechanism, one end of the pressing mechanism being transmission-connected to the straight rod (9), and the other end of the pressing mechanism being transmission-connected to the second electric telescopic rod (20).

4. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 3, characterized in that: The supporting mechanism includes a first slide groove (21), the first slide groove (21) is fixedly connected in the frame (19), a first slider (22) is slidably connected in the first slide groove (21), a first motor (23) is fixedly connected in the frame (19), a first threaded rod (24) is rotatably connected in the slide groove, a first threaded hole is provided on the first slider (22), the first threaded rod (24) is threadedly connected in the threaded hole, a lifting mechanism is fixedly connected to the first slider (22), and the pressing mechanism is movably connected to the lifting mechanism.

5. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 4, characterized in that: The lifting mechanism includes a second slide groove (25), the second slide groove (25) is fixedly connected to the first slider (22), a second slider is slidably connected in the second slide groove (25), a fixed shaft (27) is fixedly connected to the second slider, the fixed shaft (27) extends out of the second slide groove (25), a second motor (28) is fixedly connected to the second slide groove (25), a second threaded rod is rotatably connected in the second slide groove (25), a second threaded hole is opened on the second slider (26), the second threaded rod is threadedly connected in the second threaded hole, an output shaft of the second motor (28) is fixedly connected to the second threaded rod, and the pressing mechanism is movably connected to the fixed shaft (27).

6. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 5, characterized in that: The pushing mechanism includes an elastic pushing rod (30), a third through hole is provided on the elastic pushing rod (30), the fixed shaft (27) is passed through the third through hole, one end of the elastic pushing rod (30) is rotatably connected to a connecting plate (31), a push plate (32) is fixedly connected to the connecting plate (31), the other end of the elastic pushing rod (30) is fixedly connected to two electromagnets (33), the electromagnets (33) are located on the upper end surface and the lower end surface of the pushing rod (30), the output end of the second electric telescopic rod (20) is fixedly connected to a metal plate (34), a first rack (35) is fixedly connected to the push plate (32), and a plurality of second racks (36) are fixedly connected to the straight rod (9), and the first rack (35) and the second rack (36) are meshed.

7. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 3, characterized in that: The elastic pressing rod (30) includes a rod body (37), a cavity and a fourth through hole are provided on the rod body (37), the cavity and the fourth through hole are communicated, a movable rod (38) is inserted into the fourth through hole, a limit block (39) is fixedly connected in the cavity, a spring (40) is placed in the cavity, one end of the spring (40) abuts against the limit block (39), and the other end of the spring (40) abuts against the cavity, the third through hole is provided on the rod body (37), and the connecting plate (31) is rotatably connected to the movable rod (38).

8. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 1, characterized in that: The connecting mechanism comprises a second connecting plate (41), the second connecting plate (41) being fixedly connected to the base plate (1), a third connecting plate (42) being rotatably connected to the second connecting plate (41), a rubber ring (43) being fixedly connected to the third connecting plate (42), and the rubber ring (43) being detachably connected to the gripping rod (11).

9. The device for collecting soil from the rhizosphere of flooded poplar trees according to claim 1, characterized in that: The fixing mechanism comprises a plurality of drill rods (44), the bottom ends of the drill rods (44) are fixedly connected to spiral pieces (45), the base plate (1) is provided with a plurality of through holes, the drill rods (44) are passed through the through holes, a stopper (26) is fixed to the top end of the drill rods (44), and a handle (29) is fixedly connected to the stopper (26).

10. A method for collecting soil from the rhizosphere of flooded poplar trees, based on the device for collecting soil from the rhizosphere of flooded poplar trees as claimed in claim 1, characterized in that: The steps include: Step 1: Place the substrate (1) in water, start the air pump, and introduce air into the outer tube (2) through the air pump. Slowly press the substrate (1) downward to make the rubber skirt (5) at the bottom of the outer tube (2) contact the soil at the bottom of the water. During the downward movement of the outer tube (2), the internal airflow will cause the water in the outer tube (2) to be discharged. Step 2: Using a fixing mechanism to fix the substrate (1) on the bottom of the water; Step 3: Press the bottom plate (10) downwards by the handle (11) to move the inner cylinder (7) downwards until it reaches the lowest point, and then connect it to the handle (11) using a connecting mechanism; Step 4: The straight rod (9) is driven downward by the power mechanism, and the straight rod (9) drives the sampling tube (8) downward, so that the sampling tube (8) is inserted into the underwater soil to take samples. When the sampling tube (8) is completely inserted into the underwater soil, the cutting mechanism is used to cut off the soil inside the sampling tube (8) from the soil outside. Step 5: lift the sampling tube (8) through the power mechanism, untie the connection between the connecting mechanism and the gripping rod (11), and lift the inner tube (7) until the inner tube (7) is taken out of the outer tube (2).

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