CN214628382U - Test device suitable for research soil-animal-plant interface process - Google Patents

Abstract

The utility model discloses a test device suitable for research soil-animal-plant interface process, including circular apron, cylindrical bucket, cylindrical net bucket and iron bamboo slips, cylindrical net bucket is located the inside intermediate position of cylindrical bucket, and the one deck nylon wire is hugged closely to the inner wall, and goes up along keeping at same level on two buckets to it is fixed with circular apron and iron bamboo slips, and it has plant planting hole, bleeder vent and handle jack to open on the circular apron, can grow seedlings earlier in cylindrical field planting sponge before the plant field planting, treat that the seedling is grown out the back insert the soil with the field planting cotton together can. The utility model discloses the device can restrict plant roots and soil animal home range in suitable soil within range, can not influence the normal activity of soil animal simultaneously to effectively prevent the animal escape, thereby greatly increased soil animal and the contact chance at plant roots interface, this device can also be used to the indirect influence of the activity of research soil animal to plant interface process under the condition of contactless root system.

Description

Test device suitable for research soil-animal-plant interface process

Technical Field

The utility model belongs to the technical field of soil ecology test device, especially, relate to a test device suitable for research soil-animal-plant interface process.

Background

The biodiversity in the soil accounts for more than 25% of the total biodiversity of the earth. A large number of researches show that higher soil biodiversity is important for improving soil fertility and maintaining soil health and is taken as one of key indexes for measuring soil ecological health. As an indispensable ring in a soil ecosystem, soil animals can improve the soil structure through activities such as predation, excretion, digging holes and the like, adjust the growth environment of soil microorganisms and plant roots, remarkably influence the biogeochemical cycle process of nutrient elements such as carbon, nitrogen, phosphorus and the like in soil, and further remarkably promote the growth and development of plants. Therefore, the important roles of the diversity and biomass of soil animals in the soil ecosystem in maintaining the ecological health of soil and promoting the growth and development of plants are receiving more and more attention.

During the growth and development process of the plants, various necessary nutrients are continuously absorbed from the soil environment, and meanwhile, a large amount of root exudates, dead branches and fallen leaves and other organic substances are generated to enter the soil environment, so that abundant food sources are provided for soil microorganisms and soil animals, and finally, the nutrients are converted into effective nutrients again to be absorbed and utilized by the plant roots. Evidence shows that plants can collect specific root system growth-promoting bacteria in root systems by secreting special signal substances according to self needs, so that the soil nutrient effectiveness and the root system nutrient absorption efficiency are obviously improved, and rhizosphere microorganisms play an important role in the plant pest and disease resisting process. Other researches show that not only rhizosphere microorganisms, but also plant root endophytes, leaf endophytes and phyllospheric microbial community structures are also influenced by soil environment and significantly influence the growth and development process of plants. At present, the regulation and control effects of soil animals on the soil environment and the influence effect on the soil microbial community are widely known, but how soil animals further influence the growth and development process of plants needs to be further researched. Therefore, the research on the interaction relationship among soil animals, microorganisms and plants in the soil environment is helpful for further understanding the action mechanism of soil organisms on regulating the nutrient circulation of soil and promoting the growth and development of plants, and has important significance on promoting the ecological health of soil, improving the soil fertility and ensuring the safety of agricultural products.

Root boxes are currently used as the main research tool in research on the soil-microorganism-plant interface process. Root case generally all can use multilayer nylon to separate the net, makes the plant roots can hug closely the nylon wire growth, the rhizosphere soil sample near acquireing the root system that can be accurate. However, the plant roots in the root box generally grow intensively in a narrow space, so that the root box is not suitable for inoculating large and medium soil animals, and most of the plant roots are tightly attached to the nylon net wall, so that the contact probability of the soil animals and the root systems is greatly limited, and the test accuracy is further reduced. Most of the existing researches are to directly inoculate soil animals into a pot experiment, but because the soil animals have wider moving range, the method cannot accurately control the moving range of the soil animals, weakens the influence of the soil animals on plants, and cannot further explore the influence of the soil animals on the plant interface process under the condition of not contacting with a soil root system.

Disclosure of Invention

The utility model aims at providing a testing device suitable for research soil-animal-plant interface process to the not enough of prior art. The utility model is suitable for researching the biological and chemical processes among various soil large and medium invertebrates (such as earthworms, dung beetles, snails, pillbugs, mainland and the like), soil microorganisms and plant interfaces; adopt the utility model discloses test device can be effectual with the home range restriction of plant roots and soil animal in suitable within range, the contact opportunity of greatly increased soil animal and plant to can study the indirect influence of soil animal to plant interface biology process and vegetation situation under the condition of contactless plant.

The purpose of the utility model is realized through the following technical scheme: a test device suitable for researching a soil-animal-plant interface process comprises a circular cover plate 1, a cylindrical net barrel 2, a cylindrical barrel 3, an iron tag 4 and a planting sponge 5. A cylindrical mesh drum 2 is located in the cylindrical drum 3.

The circular cover plate 1 is provided with a planting hole 103, an air hole 104 and a handle jack 105. The cylindrical net barrel 2 comprises an inverted concave-shaped handle 201, a circular barrel upper edge 202, a cubic column bar 203, a barrel bottom 204 and a nylon net 205. The bucket bottom 204 is provided with a square tooth socket along the circumferential edge of the outer side, and the middle part is also provided with a long hole; the upper edge 202 of the circular barrel is provided with a plurality of square tooth grooves along the inner side circumferential edge; the cylindrical tub 3 includes a cylindrical tub body 301 and a drain hole 302. A drain hole 302 is located at the bottom of the cylindrical bowl 301. The field planting sponge 5 is provided with a cutting seam from top to bottom.

The inverted concave-shaped handle 201 is arranged on the upper edge 202 of the circular barrel and is inserted into the handle insertion hole 105 on the circular cover plate 1; the upper edge 202 of the circular barrel is connected with the barrel bottom 204 through a cubic column bar 203, and two ends of the cubic column bar 203 are respectively clamped into square tooth grooves of the upper edge 202 and the barrel bottom 204 of the circular barrel; a layer of cup-shaped nylon net 205 is covered on the inner side of the cubic column strip 203 and the upper part of the barrel bottom 204, and the circular cover plate 1 is erected on the cylindrical barrel body 301. The two ends of the iron stick 4 simultaneously penetrate through the inverted concave-shaped handle 201 to connect the circular cover plate 1 and the cylindrical mesh barrel 2 together. The planting sponge 5 is inserted into the planting hole 103.

Further, soil is paved between the cylindrical mesh barrel 2 and the cylindrical barrel 3 and in the cylindrical mesh barrel 2; wherein, the space between the soil in the cylindrical mesh barrel 2 and the circular cover plate 1 is at least 1cm, and the volume or the mass of the soil at the inner side and the outer side of the cylindrical mesh barrel 2 are equal; soil animals are inoculated between two barrels or in the cylindrical net barrel 2 according to the experimental requirements.

Furthermore, before the plants are transplanted, the plant seeds are wrapped in the planting sponge 5 for accelerating germination, then the plants and the planting sponge 5 are inserted into the planting holes 103 together, and the planting sponge 5 is plugged into the vacant planting holes 103 to prevent the soil animals from escaping.

Further, the iron tag 4 is made of stainless steel; except the nylon net 205, the planting sponge 5 and the iron stick 4, the other parts are made of acrylic plates, hard plastics or PP plates; the thickness is 3-5 mm.

Further, the planting holes 103 are used for plant growth; the air holes 104 are used for air circulation and preventing soil animals from escaping; the distance between adjacent cubic bars 203 and the diameter of the drain hole 302 are determined by the size of the inoculated soil animals, and are used for increasing air permeability and water permeability and preventing the soil animals from entering gaps between the cubic bars 203 and the drain hole 302; the field planting sponge 5 is used for preventing soil animals from escaping from the field planting holes 103 and transplanting plants, and the lower part of the field planting sponge needs to be in contact with soil.

Further, the diameter of the circular cover plate 1 is 14-20 cm; the diameter of the air holes 104 is 2-3 mm; the diameter of the planting hole 103 is 1-2 cm; the aperture of the nylon net 205 is 200-400 meshes; the diameter of the barrel bottom 204 is 9.4-15.6 cm; the width of the strip hole is 2-3 mm; the outer diameter of the upper edge 202 of the circular barrel is 10-16cm, and the inner diameter is 9-15 cm; the length of the cubic column bar 203 is 13-19cm, and the cross section is a square with the side length of 2-3 mm; the distance between adjacent cubic column bars 203 is 2-5 mm; the outer diameter of the cylindrical barrel 3 is 14-20cm, the height is 14-20cm, and the height is at least 1cm higher than that of the cylindrical mesh barrel 2; the diameter of the drain hole 302 is 2-3 mm; the diameter of the iron stick 4 is 2.5-3mm, and the length is 15-20 cm; the section width of the cutting seam of the planting sponge 5 is 1-1.5 cm.

Further, the circular cover plate 1 is composed of two half-moon shaped covers 101 and a rounded rectangular cover 102 in the middle. The planting hole 103 is formed between the half-moon-shaped cover 101 and the round-corner rectangular cover 102; the handle insertion hole 105 is opened on the half moon cover 101.

Further, the rounded rectangular cover 102 has a width of 5-7 cm. The circle centers of the planting holes 103 on the same side of the rounded rectangular cover 102 are 4-6cm apart; the handle insertion holes 105 are located on the central axis of the half moon shaped cover 101 and are 2-4cm away from the straight side.

Further, the planting sponge 5 is a cylinder with the diameter of 2-3cm and the height of 2-3 cm. The incision of the planting sponge 5 is cut along the radius.

Further, the cylindrical barrel 301 is black to simulate a dark environment suitable for soil animal growth.

The utility model has the advantages as follows:

1. the top of the device is completely covered by the cover, and the vent hole and the plant planting hole are reserved, so that the normal growth of plants and the unrestricted circulation of air can be ensured, and meanwhile, soil animals can be effectively prevented from escaping. The design that the three covers can move freely can facilitate early-stage soil filling, plant field planting, soil animal inoculation, water and fertilizer supplement, observation of living conditions of soil animals and later-stage soil sampling;

2. the design of the two inverted concave-shaped handles, the iron sticks and the covers on the cylindrical net barrel can accurately control the position of the net barrel to ensure that the width of an outer annular area is consistent, prevent the net barrel from moving up and down, simultaneously avoid a gap between the top layer cover and the net barrel and effectively prevent soil animals from escaping to the other side;

3. divide into inboard plant growth district and outside soil animal activity area with soil, can avoid outside soil animal and plant root system direct contact, simultaneously moisture and nutrient flow between the soil of both sides are not influenced, can further explore the indirect influence of soil animal activity to the plant under the condition of not direct contact.

Drawings

FIG. 1 is a schematic structural view of a testing device of the present invention;

FIG. 2 is a schematic view of the structure of three covers of the present invention;

fig. 3 is a schematic structural view of the cylindrical net barrel of the present invention;

FIG. 4 is a schematic view of the cylindrical barrel of the present invention;

FIG. 5 is a schematic diagram of the longitudinal cross-sectional structure of the test device of the present invention;

in the figure: the device comprises a circular cover plate 1, a cylindrical net barrel 2, a cylindrical barrel 3, an iron stick 4, a planting sponge 5, a half-moon-shaped cover 101, a round-corner rectangular cover 102, a planting hole 103, an air hole 104, a handle jack 105, an inverted concave-shaped handle 201, an annular barrel upper edge 202, a cubic column strip 203, a barrel bottom 204, a nylon net 205, a cylindrical barrel body 301 and a water drainage hole 302.

Detailed Description

The specific structure and test embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, the utility model relates to a test device suitable for research soil-animal-plant interface process, including circular apron 1, cylindrical net bucket 2, cylindrical bucket 3, iron bamboo slips 4 and four cylindrical field planting sponges 5. A cylindrical mesh drum 2 is located in the cylindrical drum 3. The utility model discloses in except nylon wire 205, field planting sponge 5, iron bamboo slips 4, all the other all accessories are all formed by the customization of materials such as inferior gram force board, rigid plastic or PP board, and thickness is between 3-5 mm.

As shown in fig. 2, the circular cover plate 1 is composed of two half-moon-shaped covers 101 and a round-corner rectangular cover 102 in the middle, and two planting holes 103 are formed between each half-moon-shaped cover 101 and the round-corner rectangular cover 102; a plurality of air holes 104 are uniformly arranged on the circular cover plate 1, and two half moon-shaped covers 101 are respectively provided with a handle jack 105. The intersection point of the connecting lines between the centers of the two pairs of implantation holes 103 at the diagonal positions is the center of the circular cover plate 1, so that the four implantation holes 103 are ensured to be uniformly distributed around the center of the circular cover plate 1. Wherein, plant planting hole 103 is used for the plant normal growth, and bleeder vent 104 is used for the circulation of air and prevents that soil animal from escaping, and handle jack 105 is used for fixed cylindrical net bucket. The diameter of the circular cover plate 1 is 14-20 cm; the diameter of the air holes 104 is 2-3 mm; the diameter of the planting hole 103 is 1-2 cm; the circle centers of the four planting holes 103 are 5-7cm in transverse distance and 4-6cm in longitudinal distance; the handle insertion holes 105 are located on the central axis of the half moon shaped cover 101 and are 2-4cm away from the straight side.

In this embodiment, the circular cover plate 1 is mainly made of a circular plate having a diameter of 14cm, and 168 ventilation holes 104 having a diameter of 3mm are uniformly drilled in the circular plate to maintain ventilation and prevent soil animals from escaping. Four planting holes 103 with the diameter of 1.5cm are cut around the circle center of the circular cover plate 1, the circle center of the four planting holes 103 is 5cm in transverse distance, and the longitudinal distance is 4 cm. The circular cover plate 1 is cut into three along the connection line of the circle centers of two adjacent pairs of planting holes 103 of the circular cover plate 1, two half-moon-shaped covers 101 and a round rectangular cover 102 are respectively formed, and a rectangular handle jack 105 with the length of 1cm and the width of 0.5cm is cut at the position 2.5cm away from the straight line edge on the central axis of the two half-moon-shaped covers 101.

As shown in fig. 3, the cylindrical net barrel 2 is mainly composed of two inverted-concave-shaped handles 201, a circular-ring-shaped barrel upper edge 202, a cubic column 203, a barrel bottom 204 and a nylon net 205 which are adhered together. The bucket bottom 204 is provided with a plurality of square tooth sockets along the circumferential edge of the outer side, and the middle part of the bucket bottom 204 is also provided with a plurality of strip holes; the upper edge 202 of the circular barrel is provided with a plurality of square tooth grooves along the inner side circumferential edge; the inverted concave-shaped handles 201 are symmetrically arranged on the upper edge 202 of the circular barrel and are inserted into the handle insertion holes 105 on the circular cover plate 1; the upper edge 202 of the circular barrel is connected with the barrel bottom 204 through a cubic column bar 203, and two ends of the cubic column bar 203 are respectively clamped into square tooth grooves of the upper edge 202 and the barrel bottom 204 of the circular barrel; a layer of cup-shaped nylon net 205 is covered on the inner side of the cubic column strip 203 and the upper part of the barrel bottom 204. The space between every two cubic columns 203 is 2-5mm, which is determined according to the size of the inoculated soil animal, so as to increase the air permeability and the water permeability of the barrel wall to the maximum extent and prevent the soil animal from entering gaps between the cubic columns 203; the connection between the inner side of the cubic column 203 and the nylon net 205 above the barrel bottom 204 is fixed by glue or sealed by sewing with needle and thread to prevent soil animals and plant roots from entering the other side from the gap. Wherein, the aperture of the nylon net 205 is 200-400 meshes, preferably 350 meshes; the diameter of the barrel bottom 204 is 9.4-15.6 cm; the width of the square tooth socket is 2-3mm, the depth is 2-3mm, and the specific size is consistent with the cross section of the cubic column bar 203; the number of the long holes is 12-15, and the width is 2-3 mm; the outer diameter of the upper edge 202 of the circular barrel is 10-16cm, and the inner diameter is 9-15 cm; the length of the cubic column bar 203 is 13-19cm, and the cross section is a square with the side length of 2-3 mm.

In this embodiment, the bottom 204 of the cylindrical mesh drum 2 is made of a circular plate with a diameter of 10cm, 50 square tooth grooves with a width of 3mm and a depth of 3mm are uniformly cut along the edge of the circular plate, and 12 long holes with a width of 3mm are uniformly cut in the middle of the circular plate, so as to ensure the air permeability and water permeability of the bottom 204 to the maximum extent. The upper edge 202 of the circular barrel is made of a ring with the outer diameter of 10.5cm and the inner diameter of 9.3cm, 50 square tooth grooves with the same position, the same quantity and the same size as those of the barrel bottom are cut at the edge of the inner side of the upper edge 202 of the circular barrel, two inverted concave-shaped handles 201 are stuck at the opposite positions above the upper edge 202 of the circular barrel, the outer diameter of each inverted concave-shaped handle 201 is a square with the side length of 9mm, a rectangle with the length of 6mm and the width of 3mm is cut at the middle position of the bottom edge to form an inverted concave shape, and each inverted concave-shaped handle 201 can just penetrate through the handle insertion hole 105. The barrel bottom 204 and the circular barrel upper edge 202 are mutually connected by 50 cubic column bars 203 with the length of 13cm and the cross section of a square with the side length of 3mm, each cubic column bar 203 can be just clamped into a square tooth socket which is pre-cut on the barrel bottom 204 and the circular barrel upper edge 202 and is fixed by glue, so that at least a 3mm distance exists between the root system in the cylindrical net barrel 2 and the soil animal moving range outside the cylindrical net barrel 2.

As shown in fig. 4, the cylindrical tub 3 includes a cylindrical tub body 301 and a drain hole 302. The outer side of the circular cover plate 1 is erected on the cylindrical barrel 3; the bottom of the cylindrical barrel body 301 is provided with a drainage hole 302 for facilitating soil drainage. Wherein, the outer diameter of the cylindrical barrel 3 is 14-20cm, the height of the bottom is 14-20cm, and the height is at least 1cm higher than that of the cylindrical net barrel 2, so as to ensure that the bottom of the net barrel still has the activity space of soil animals; the diameter of the drainage hole 302 is 2-3mm, which is determined according to the size of the animal to be inoculated.

In the embodiment, the outer diameter of the cylindrical barrel 3 is 14cm, the height of the bottom is 14cm, and a plurality of drainage holes 302 with the diameter of 3mm are uniformly formed in the bottom, so that the soil drainage is facilitated, and meanwhile, soil animals are prevented from escaping; if 3 materials of cylindrical bucket are transparent material, 3 lateral walls of cylindrical bucket should paste the penetration of one deck black shading sticker and prevent external light to the suitable dark surrounds that soil animal grows of simulation.

The iron stick 4 simultaneously passes through the two inverted concave-shaped handles 201 to connect the circular cover plate 1 and the cylindrical mesh barrel 2 together. Wherein the diameter of the iron stick 4 is 2.5-3mm, and the length is 15-20 cm.

In this embodiment, iron pick 4 is the long 15 cm's of stainless steel iron pick of diameter 2.5mm, covers 1 back iron pick 4 of circular apron and can pass two inverted-concave shape handles 201 simultaneously just.

The field planting sponge 5 is directly inserted into the field planting hole 103 when the plants are field planted, so that soil animals are prevented from escaping from the field planting hole 103; cutting a section of the field planting sponge 5 along the axial direction by a radius to obtain a cutting seam for conveniently transplanting plant seedlings in a large batch; the lower part of the planting sponge 5 can be fully contacted with soil. Wherein the planting sponge 5 is a cylinder with the diameter of 2-3cm and the height of 2-3cm, the length of the section of the cutting seam is 2-3cm, and the width is 1-1.5 cm.

In this embodiment, the field planting sponge 5 is a sponge cylinder with a diameter of 2cm and a height of 2cm, and a section with a length of 2cm and a width of 1cm is vertically and longitudinally cut along a radius.

As shown in fig. 5, the working process of the present invention specifically includes:

firstly, uniformly paving soil with the thickness of at least 1cm at the bottom of the cylindrical barrel 3, so that when the cylindrical mesh barrel 2 is placed on the soil, the upper surface of the upper edge 202 of the circular barrel and the upper edge of the cylindrical barrel body 301 are exactly positioned on the same horizontal line; then cylindrical net bucket 2 covers two semilunar covers 101, makes the handle 201 of falling the character of ' ao ' shape pass handle jack 105 to fix semilunar cover 101 and cylindrical net bucket 2 with iron label 4, put semilunar cover 101 and cylindrical net bucket 2 into cylindrical bucket 3 together, make two semilunar covers 101 arc limit can be tangent with cylindrical bucket 3 edges, cylindrical net bucket 2 can be located cylindrical bucket 3's central point just this moment, have the determining deviation between two buckets. Then soil is added into the cylindrical mesh barrel 2 and between the two barrels, and the volume and the quality of the soil on the inner side and the outer side of the cylindrical mesh barrel 2 are equal; the distance between the soil in the cylindrical net barrel 2 and the circular cover plate 1 is at least 1 cm. According to the experimental requirement, soil animals are inoculated between the two barrels or in the cylindrical net barrel, and after the inoculation of the soil animals is completed, the rounded rectangular cover 102 is pushed in from the side.

Plant seedling can be earlier with plant seed package 5 inside of field planting sponge, place in water or nutrient solution vernalization, treat that the root system is about to extend to the sponge bottom, insert the field planting hole 103 with seedling and field planting sponge 5 together, make 5 bottoms of field planting sponge and below soil contact or insert inside the soil, make plant seedling root system can be in soil natural growth. The test device of this embodiment can plant four plants at most, and specific planting quantity can be according to plant physiological characteristics and root system form etc. and decision, and idle field planting hole 103 should go up field planting sponge 5 in order to prevent that soil animal from escaping.

In the sampling period, firstly, the iron stick 4 is pulled out, the circular cover plate 1 is completely opened, soil around the plant root system is loosened carefully by using a small shovel, the plant is taken out, the cylindrical net barrel 2 is lifted out carefully by using two hands, after the soil attached to the outer side of the cylindrical net barrel 2 is removed, the soil in the cylindrical net barrel 2 is poured into a clean container gently, the plant root system and soil animals are picked out, and the soil attached to the surface of the plant root is collected by using an artificial shaking method or a phosphoric acid buffer solution centrifugation method to be used as a rhizosphere soil sample; if the root system is fully distributed in the whole cylindrical net barrel 2, all the soil in the cylindrical net barrel 2 can be regarded as rhizosphere soil, and the soil outside the cylindrical net barrel 2 can be regarded as non-rhizosphere soil.

The utility model has the characteristics of it is following:

1. the test device has detachability and can be repeatedly used.

2. The volume of the soil on the inner side and the outer side of the test is basically equal, so that test errors caused by different soil quality on the inner side and the outer side are eliminated, and the soil on the inner side and the outer side can be used for normal survival of soil animals for a long time under the condition of sufficient food sources.

3. The thickness of each square column of the net barrel is 2-3mm, gaps between the square columns can be automatically adjusted (2-5mm), and can be set according to the average body width of inoculated soil animals, so that the soil animals are prevented from being close to the inner nylon net layer in direct contact, the influence of a small amount of rhizosphere soil at the edge of the nylon net bag on the soil animals on the outer side is eliminated, and meanwhile, the unrestricted exchange of soil moisture and nutrients on the inner side and the outer side can be ensured.

4. The upper cover can prevent that soil animal from escaping when guaranteeing the circulation of air to can be in the same place lid and cylindrical net bucket are fixed with the iron pick, in order to avoid the staving to sink and lead to bottom soil compaction to influence outside soil animal activity, the ring shape bucket of cylindrical net bucket is gone up along can enlarging the barrel along the area of contact with the lid simultaneously, can further avoid appearing the gap between net bucket and the lid and lead to one side soil animal to get into the opposite side out of bounds.

5. Plant seeds can be wrapped inside the field planting sponge and placed in water or nutrient solution for germination acceleration, the sponge is inserted into the field planting holes in the cover after the seeds germinate, the bottom of the sponge is in contact with the soil below or is inserted into the soil, and the root system can stretch into the soil for natural growth. The design is favorable for rapidly planting the plant seedlings in large batches, and can effectively prevent the inner soil animals from escaping through the planting holes.

Claims (10)

1. A test device suitable for researching a soil-animal-plant interface process is characterized by comprising a circular cover plate (1), a cylindrical net barrel (2), a cylindrical barrel (3), an iron tag (4) and a planting sponge (5); the cylindrical mesh barrel (2) is positioned in the cylindrical barrel (3);

the circular cover plate (1) is provided with a planting hole (103), an air hole (104) and a handle jack (105); the cylindrical net barrel (2) comprises an inverted concave-shaped handle (201), an annular barrel upper edge (202), a cubic column bar (203), a barrel bottom (204) and a nylon net (205); the barrel bottom (204) is provided with a square tooth socket along the circumferential edge of the outer side, and the middle part is also provided with a long hole; the upper edge (202) of the circular barrel is provided with a plurality of square tooth grooves along the inner side circumferential edge; the cylindrical barrel (3) comprises a cylindrical barrel body (301) and a drainage hole (302); the drain hole (302) is positioned at the bottom of the cylindrical barrel body (301); the planting sponge (5) is provided with a cutting seam from top to bottom;

the inverted concave-shaped handle (201) is arranged on the upper edge (202) of the circular barrel and is inserted into the handle insertion hole (105) on the circular cover plate (1); the upper edge (202) of the circular barrel is connected with the barrel bottom (204) through a cubic column bar (203), and two ends of the cubic column bar (203) are respectively clamped into square tooth grooves of the upper edge (202) and the barrel bottom (204) of the circular barrel; a layer of cup-shaped nylon net (205) is covered on the inner side of the cubic column bar (203) and the upper part of the barrel bottom (204), and the circular cover plate (1) is erected on the cylindrical barrel body (301); two ends of the iron stick (4) simultaneously penetrate through the inverted concave-shaped handles (201) to connect the circular cover plate (1) and the cylindrical mesh barrel (2) together; the planting sponge (5) is inserted into the planting hole (103).

2. Test device suitable for studying soil-animal-plant interface processes according to claim 1, characterized in that the iron tag (4) is stainless steel.

3. Test device suitable for studying the soil-animal-plant interface process as claimed in claim 1, characterized in that the material of the other parts besides the nylon mesh (205), the planting sponge (5), the iron tag (4) is acrylic plate, rigid plastic or PP plate; the thickness is 3-5 mm.

4. Test device suitable for studying soil-animal-plant interface processes as claimed in claim 1, characterized in that the circular cover plate (1) has a diameter of 14-20 cm; the diameter of the air holes (104) is 2-3 mm; the diameter of the planting hole (103) is 1-2 cm; the aperture of the nylon net (205) is 200-400 meshes; the diameter of the barrel bottom 204 is 9.4-15.6 cm; the width of the strip hole is 2-3 mm; the outer diameter of the upper edge (202) of the circular barrel is 10-16cm, and the inner diameter is 9-15 cm; the length of the cubic column bar (203) is 13-19cm, and the cross section is a square with the side length of 2-3 mm; the distance between adjacent cubic column bars (203) is 2-5 mm; the outer diameter of the cylindrical barrel (3) is 14-20cm, the height is 14-20cm, and the height is at least 1cm higher than that of the cylindrical mesh barrel (2); the diameter of the drain hole (302) is 2-3 mm; the diameter of the iron stick (4) is 2.5-3mm, and the length is 15-20 cm; the section width of the cutting seam of the planting sponge (5) is 1-1.5 cm.

5. Test device suitable for studying soil-animal-plant interface processes according to claim 1, characterized in that the circular cover plate (1) consists of two half-moon shaped covers (101) and a central rounded rectangular cover (102).

6. Test device suitable for studying soil-animal-plant interface processes as claimed in claim 5, characterized in that the planting holes (103) open between the half-moon shaped cover (101) and the rounded rectangular cover (102); the handle insertion hole (105) is arranged on the half-moon-shaped cover (101).

7. The test device suitable for studying soil-animal-plant interface process as claimed in claim 6, wherein the center of the planting holes (103) on the same side of the rounded rectangular cover (102) is 4-6cm apart; the handle insertion hole (105) is positioned on the central axis of the half-moon-shaped cover (101) and is 2-4cm away from the straight line edge.

8. Test device suitable for studying soil-animal-plant interface processes according to claim 5, characterized in that the rounded rectangular cover (102) has a width of 5-7 cm.

9. Test device suitable for studying the soil-animal-plant interface process as claimed in claim 1, characterized in that the colonisation sponge (5) is a cylinder of diameter 2-3cm and height 2-3 cm; the slits are along a radius.

10. Test device suitable for studying soil-animal-plant interface processes as claimed in claim 1, characterized in that the cylindrical barrel (301) is black.

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