Ecological bag for full-section ecological transformation of farmland soil drainage ditch and transformation method

Abstract

The invention discloses an ecological bag for full-section ecological transformation of a farmland soil drainage ditch and a transformation method.The ecological bag comprises an ecological bag body, an ecological bag filler and an ecological bag fixing piece, and the ecological bag filler is arranged in the ecological bag body; the ecological bag body is fixed on the full section of the farmland soil drainage ditch through the ecological bag fixing piece. The method has the advantages that the ecological transformation difficulty of a common farmland soil drainage ditch is effectively reduced, the daily management difficulty after ecological transformation of the common farmland soil drainage ditch is reduced, and the in-situ digestion efficiency of non-point source pollution of farmland water recession agriculture is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of farmland soil drainage ditch reconstruction, and specifically relates to an ecological bag used for the full-section ecological reconstruction of a farmland soil drainage ditch and a reconstruction method. Background Art

[0002] Ditches are an important part of the farmland drainage system. They are channels for farmland surface runoff and some infiltration to flow into lakes and rivers. Farmland drainage ditches with sediment and aquatic plants are generally called ecological ditches. The plant-sediment-microorganism system in the ecological ditch enables the ditch to perform functions similar to wetlands during the base flow period when the water flow is slow.

[0003] In ecological ditches, the nitrogen and phosphorus concentrations carried in the runoff can be effectively reduced through sediment interception, plant absorption and microbial decomposition, achieving the effects of "three removals" (removing garbage, silt and weeds) and "three interceptions" (intercepting sewage, sediment and floating objects).

[0004] The utilization rate of nitrogen and phosphorus fertilizers in farmland has always been low. According to relevant research, the utilization rate is about 30% to 35% and 10% to 20%. The nitrogen and phosphorus fertilizers applied to farmland that are not absorbed and utilized by crops will enter surface water and groundwater through rainfall and leakage, causing pollution. The control measures for agricultural non-point source pollution are mainly divided into source control and terminal treatment, among which source control is the most effective. In source control, plant buffer zones, artificial wetlands, ecological ditches, etc. are the most common practices. Among them, ecological ditches are more suitable for promotion and application in rural areas due to their low construction cost and high pollution removal efficiency.

[0005] The drainage water generated by most farmlands in my country during agricultural production has become an important path for agricultural non-point source pollution to enter water bodies. The drainage ditches between farmlands in my country are generally traditional earthen ditches or hardened ditches. Both forms of ditch systems only focus on their drainage function and have little effect on the interception of suspended solids, nitrogen and phosphorus. The two major foundations for building ecological ditches are substrates and plants. The ecological transformation of ordinary farmland soil drainage ditches needs to start from these two aspects, so that they can have the effect of purifying water bodies while draining water.

[0006] At present, the common ecological transformation of ordinary farmland soil drainage ditches, for large ditches (width of more than 2m), adopts the method of covering the entire cross-section of the ditch with hollow grass bricks and planting aquatic plants. For small ditches (width of 1-2m), the method of laying ecological fillers at the bottom of the ditch after hardening the cross-section of the ditch body is more often adopted. It mainly starts from the ditch bottom matrix, and selects sand, gravel and other materials with good water permeability and low price. In addition, it can also add matrix with strong adsorption or conducive to microbial growth, such as zeolite and volcanic rock. The laying thickness of the matrix should meet the requirements of plant planting, generally more than 20cm is appropriate, to ensure that the roots of the plants have enough growth space. However, this approach also requires that the ditch walls on both sides of the ditch have a certain slope, or the depth cannot be too large, otherwise the ditch wall is very easy to collapse, or more expensive engineering methods are adopted when hardening the ditch wall, such as ordinary concrete needs to add steel mesh.

[0007] However, this transformation method still has problems such as poor resistance to heavy rain, high requirements for daily weeding and maintenance of ditches, and easy collapse of ditch walls. In order to address the above problems, the present invention intends to combine the common eco-bag technology with the characteristics of the entire section of ordinary farmland soil drainage ditches to develop an eco-bag and transformation method for the ecological transformation of the entire section of farmland soil drainage ditches, which is suitable for the ecological transformation of small farmland soil ditches with large depth and large ditch wall slope. Summary of the invention

[0008] The purpose of the present invention is to provide an eco-bag for ecological transformation of the entire cross-section of farmland soil drainage ditches.

[0009] The purpose of the present invention is also to provide a method for transforming the entire cross-section of farmland soil drainage ditches into ecology by using the above-mentioned ecological bags.

[0010] The above first object of the present invention can be achieved by the following technical scheme: an eco-bag for ecological transformation of the entire cross-section of a farmland soil drainage ditch, comprising an eco-bag body, an eco-bag filler and an eco-bag fixing member;

[0011] The eco-bag includes a farmland soil drainage ditch bottom covering section bag body, a ditch wall covering section bag body and a ditch edge covering section bag body. The ditch bottom covering section bag body has multiple rows of uniform plant growth holes on its upper surface, the ditch wall covering section bag body has uniform ventilation holes around its surface, and the ditch edge covering section bag body has uniform water absorption holes.

[0012] The eco-bag filler is filled into the eco-bag body, and the eco-bag filler mainly consists of lignified garden waste and coarse sand;

[0013] The eco-bag fixing member includes an anchor rod and a clip, wherein the clip is a circle of protrusions arranged on the anchor rod;

[0014] The anchor rods of the eco-bag fixing parts are vertically inserted into the bottom and edge of the farmland soil drainage ditch, and are obliquely inserted into the ditch walls on both sides of the farmland soil drainage ditch at an angle of 40-50 degrees to the edge or bottom of the farmland soil drainage ditch, and are fixed by snaps, and the eco-bag fixing parts of two adjacent rows are staggered;

[0015] The ditch bottom covering section bag body is located at the ditch bottom of the farmland soil drainage ditch, the ditch wall covering section bag body is arranged on the ditch wall of the farmland soil drainage ditch, and the ditch edge covering section bag body is arranged on the ditch edge of the farmland soil drainage ditch and is fixed by the ecological bag fixing piece.

[0016] Preferably, the eco-bag body is a long circular tubular bag body with a diameter of 20-25 cm and a bag wall thickness of 2 mm. The length is determined according to the width and depth of the drainage ditch in the farmland soil.

[0017] More preferably, the eco-bag body is a long circular tubular bag body with a diameter of 20 cm and a bag wall thickness of 2 mm. The length is determined according to the width and depth of the drainage ditch in the farmland soil.

[0018] Preferably, the upper surface of the bag body of the trench bottom covering section is provided with three rows of uniform plant growth holes, the hole diameter of the plant growth holes is 1-2 cm, and the hole spacing is 2-4 cm.

[0019] More preferably, the upper surface of the bag body of the trench bottom covering section is provided with three rows of uniform plant growth holes, the hole diameter of the plant growth holes is 1 cm, and the hole spacing is 3 cm.

[0020] Preferably, the vent holes have a diameter of 0.5-1 cm and a hole spacing of 2-3 cm.

[0021] More preferably, the diameter of the ventilation holes is 0.5 cm, and the distance between the holes is 2 cm.

[0022] Preferably, the length of the bag body of the groove edge covering section is 50-100 cm, more preferably 50 cm.

[0023] Preferably, the diameter of the water absorption holes is 1 cm, and the hole spacing is 1-2 cm, more preferably 1 cm.

[0024] Preferably, the particle size of the lignified garden waste and coarse sand is 0.5-1 cm.

[0025] Preferably, the mass ratio of the lignified garden waste to coarse sand is 1:1-1:2.

[0026] Preferably, the length of the anchor rod is 60cm-100cm, the rod diameter is 2cm, the anchor rod is a non-prestressed full-length anchored friction anchor rod in the soil layer, and the material is metal, wood or bamboo. The two ends of the anchor rod body are elliptical spherical, and the rod body is densely covered with rough dot-like protrusions.

[0027] Preferably, the catch is a circle of protrusions located 10 cm away from one end of the anchor rod, and its diameter is 3 cm.

[0028] Preferably, the eco-bag fixing part further comprises a soil retaining plate, which is a gasket with a diameter of 20-25 cm and a circular hole with a diameter of 2 cm in the middle, and the soil retaining plate is sleeved on the anchor rod from the end away from the clip.

[0029] The eco-bag of the present invention is mainly aimed at the ecological transformation of small farmland soil ditches with large depth and large ditch wall slope.

[0030] The second object of the present invention can be achieved by the following technical solution: the method of using the above-mentioned eco-bag to transform the entire cross-section of the farmland soil drainage ditch comprises the following steps:

[0031] (S1) cleaning the farmland soil drainage ditch to expose the original soil layer, and performing arc chamfering on the intersection of the ditch bottom, ditch wall and ditch edge of the farmland soil drainage ditch;

[0032] (S2) the eco-bag fixing part is vertically inserted into the bottom and the edge of the farmland soil drainage ditch, and the eco-bag fixing part is obliquely inserted into the wall of the farmland soil drainage ditch and the edge or bottom of the farmland soil drainage ditch at an angle of 40-45 degrees;

[0033] (S3) After tying up the two ends of the eco-bag body filled with eco-bag fillers, place the ditch bottom covering section bag body vertically into the ditch bottom and align it with the upper end of the anchor rod of the eco-bag fixing piece, and completely press down the eco-bag body until the upper end of the anchor rod of the eco-bag fixing piece is completely immersed in the eco-bag body. Use the same method to complete the fixing of the ditch wall covering section bag body and the ditch edge covering section bag body in turn until the target farmland soil drainage ditch is completely covered.

[0034] Preferably, the chamfer arc diameter in step (S1) is 20-30 cm, more preferably 20 cm.

[0035] Preferably, in step (S2), a soil retaining plate is selected according to the soil conditions, and the soil retaining plate is inserted into the anchor rod from the end away from the latch, and the end of the anchor rod close to the latch is facing upward, and the other end is inserted into the soil until the soil retaining plate is flush with the soil surface; if the soil conditions are good and the soil retaining plate is not used, the anchor rod is inserted into the soil until the latch is flush with the soil surface.

[0036] Preferably, the spacing between the eco-bag fixings in step (S2) is 20-30 cm.

[0037] The present invention has the following advantages:

[0038] (1) Effectively reduce the difficulty of ecological transformation of ordinary farmland soil drainage ditches

[0039] The eco-bag body, eco-bag filler and eco-bag fixing member of the present invention are simple to manufacture, low in material cost, simple in construction method, and do not require special equipment. They can be applied to the ecological improvement of common farmland soil drainage ditches of various forms and sections.

[0040] (2) Reduce the difficulty of daily management after ecological transformation of ordinary farmland soil drainage ditches

[0041] After the eco-bag covers the soil drainage ditch as a whole, it can reduce the exposure of the soil in the soil ditch, which can reduce soil weathering and effectively reduce the possibility of ditch collapse; on the other hand, it can reduce the growth of weeds on the ditch surface, reduce the difficulty of daily maintenance, and reduce the possibility of siltation caused by plant growth in the drainage ditch. Compared with scattered ecological fillers at the bottom of the ditch, the eco-bags that are tightly connected to the ditch bottom, ditch wall, and ditch edge through anchor rods can effectively resist high flow rate and high flow drainage in the ditch during heavy rainfall.

[0042] (3) Improve the efficiency of on-site elimination of agricultural non-point source pollution caused by farmland drainage

[0043] The plant growth holes opened in the bag body of the ditch bottom covering section of the eco-bag can be used to plant aquatic plants that can effectively eliminate non-point source pollution from farmland. In the bag body of the ditch bottom covering section of the eco-bag, coarse sand and plant roots together form a biofilm carrier; at the same time, the lignified garden waste in the matrix of the eco-bag can adsorb non-point source pollution phosphorus compounds, and because the lignified garden waste is in an anaerobic state during the decay process in the eco-bag, the organic matter produced is an important organic carbon source, which can provide anaerobic conditions and organic carbon sources for the denitrification process (combined with the carbon dioxide produced by the ditch wall covering section of the eco-bag as an inorganic carbon source, it can provide more suitable environmental conditions for denitrification).

[0044] In addition, part of the water absorbed by the water absorption holes of the bag body along the covering section of the ecological bag ditch will slowly flow into the bag body along the covering section of the ditch wall of the ecological bag. The ventilation holes opened in the bag body of the covering section of the ditch wall can provide aerobic decay conditions for the environment inside the bag. The carbon dioxide and other gases produced by aerobic decay are important inorganic carbon sources for denitrification. After dissolving in the flowing water, they enter the bag body of the covering section of the ditch bottom of the ecological bag, providing an inorganic carbon source for denitrification. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a schematic diagram of the eco-bag body and the eco-bag filler in Example 1;

[0046] Figure 2 is a schematic diagram of the eco-bag fixing member in Example 1;

[0047] Figure 3is a schematic diagram of step (S1) in Example 2;

[0048] Figure 4 is a schematic diagram of step (S2) in Example 2;

[0049] Figure 5 It is a schematic diagram of the use of the eco-bag body in Example 1 and a schematic diagram of step (S3) in Example 2. DETAILED DESCRIPTION

[0050] The present invention is further described below in conjunction with specific examples. The following examples are only for illustrative purposes and are not to be construed as limiting the present invention. Unless otherwise specified, the raw materials used in the following examples are conventional commercially available or commercially available raw materials, and unless otherwise specified, the methods and equipment used in the following examples are conventional methods and equipment used in the art.

[0051] The present invention is further described below in conjunction with specific examples. It should be understood that the following examples are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0052] Example 1

[0053] The eco-bag (hereinafter referred to as the eco-bag) provided in this embodiment for ecological transformation of the entire cross-section of farmland soil drainage ditches includes an eco-bag body 1, an eco-bag filler 2 and an eco-bag fixing member 3;

[0054] The eco-bag body 1 comprises a farmland soil drainage ditch bottom covering section bag body 11, a ditch wall covering section bag body 12 and a ditch edge covering section bag body 13. The ditch bottom covering section bag body 11 is provided with a plurality of rows of uniform plant growth holes (not shown in the figure) on its upper surface, the ditch wall covering section bag body 12 is surrounded by uniform ventilation holes (not shown in the figure), and the ditch edge covering section bag body 13 is uniformly provided with water absorption holes (not shown in the figure). Figure 1 and Figure 5 As shown;

[0055] The eco-bag filler 2 is filled into the eco-bag body 1, and the eco-bag filler 2 is mainly composed of lignified garden waste and coarse sand;

[0056] The eco-bag fixing member 3 includes an anchor rod 31 and a catch 32. The catch 32 is a circle of protrusions arranged on the anchor rod 31. Figure 2 As shown;

[0057] The anchor rods 31 of the eco-bag fixing parts 3 are vertically inserted into the bottom and edge of the farmland soil drainage ditch, and are obliquely inserted into the ditch walls on both sides of the farmland soil drainage ditch at an angle of 40-50 degrees to the edge or bottom of the farmland soil drainage ditch, and are fixed by the clips 32. The eco-bag fixing parts 3 of two adjacent rows are staggered.

[0058] The ditch bottom covering section bag body 11 is located at the ditch bottom of the farmland soil drainage ditch, the ditch wall covering section bag body 12 is arranged on the ditch wall of the farmland soil drainage ditch, and the ditch edge covering section bag body 13 is arranged on the ditch edge of the farmland soil drainage ditch and is fixed by the ecological bag fixing part 3.

[0059] Preferably, the eco-bag body 1 is a long circular tubular bag body with a diameter of 20-25 cm and a bag wall thickness of 2 mm. The length is determined according to the width and depth of the drainage ditch in the farmland soil.

[0060] Specifically, the eco-bag body 1 is a long round tube eco-bag (made of double-sided ironed needle-punched non-woven fabric made of polypropylene (PP) or polyester fiber (PET) as raw materials) with a diameter of about 20 cm and a bag wall thickness of 2 mm (the thickness of ordinary eco-bags is usually 0.8 mm). The length is determined according to the width and depth of the farmland drainage ditch.

[0061] Preferably, the upper surface of the ditch bottom covering section bag body 11 is provided with three rows of uniform plant growth holes, the pore diameter of the plant growth holes is 1-2cm, and the hole spacing is 2-4cm; the pore diameter of the ventilation holes is 0.5-1cm, and the hole spacing is 2-3cm; the length of the ditch edge covering section bag body 13 is 50-100cm, the pore diameter of the water absorption holes is 1cm, and the hole spacing is 1-2cm.

[0062] Specifically, the eco-bag body 1 (such as Figure 1 As shown in the figure, it is divided into a ditch bottom covering section bag body 11, a ditch wall covering section bag body 12 and a ditch edge covering section bag body 13. The length of the ditch bottom covering section bag body 11 is the same as the width of the ditch bottom of the farmland soil drainage ditch. On the upper surface of the ditch bottom covering section bag body 11, three rows of uniform plant growth holes are arranged, with a hole diameter of 1 cm and a hole spacing of 3 cm; the length of the ditch wall covering section bag body is the same as the depth of the farmland soil drainage ditch. On the surface of the ditch wall covering section bag body 12, uniform ventilation holes are arranged around, with a hole diameter of 0.5 cm and a hole spacing of 2 cm; the ditch edge covering section bag body 13 is 50 cm long, and the ditch edge covering section bag body 13 is uniformly provided with water absorption holes with a hole diameter of 1 cm and a hole spacing of 2 cm.

[0063] Preferably, the particle sizes of the lignified garden waste and the coarse sand are 0.5 to 1 cm; and the mass ratio of the lignified garden waste to the coarse sand is 1:1 to 1:2.

[0064] Specifically, the eco-bag filler 2 (such as Figure 1 The filling material 2 of the eco-bag is mainly lignified garden waste with a particle size of 0.5-1 cm and coarse sand, with a ratio of 1:1 to 1:2.

[0065] The plant growth holes opened in the bag body 11 of the ditch bottom covering section can be used to plant aquatic plants that can efficiently eliminate non-point source pollution of farmland. In the bag body 11 of the ditch bottom covering section, coarse sand and plant roots together form a biofilm carrier; at the same time, the lignified garden waste with an inner matrix can adsorb non-point source pollution phosphorus compounds, and because the lignified garden waste is in an anaerobic state during the decay process in the ecological bag, the organic matter produced is an important organic carbon source, which can provide anaerobic conditions and organic carbon sources for the denitrification process (combined with the carbon dioxide produced by the bag body 12 of the ditch wall covering section as an inorganic carbon source, it can provide more suitable environmental conditions for denitrification).

[0066] Preferably, the length of the anchor rod 31 is 60 cm to 100 cm, the rod diameter is 2 cm (, the anchor rod 31 is a soil layer non-prestressed full-length anchoring friction type anchor rod, the material is metal, wood or bamboo, the two ends of the rod body of the anchor rod 31 are elliptical spherical, and the rod body is densely covered with rough dot-shaped protrusions; the catch 32 is a circle of protrusions located 10 cm away from one end of the anchor rod 31, and its diameter is 3 cm.

[0067] Specifically, the eco-bag fixing member 3 (such as Figure 2 As shown in the figure, it includes an anchor rod 31, a catch 32, and a retaining plate 33. The anchor rod 31 has a length of 60 cm to 100 cm and a rod diameter of 2 cm. It is a non-prestressed full-length anchoring friction anchor rod in the soil layer. The material can be metal, wood or bamboo. The two ends of the rod body are elliptical spherical, and the rod body is densely covered with rough dot-shaped protrusions. After being inserted into the soil, it can enhance the friction between the soil and the anchor rod; the catch 32 is a circle of protrusions located 10 cm from one end of the anchor rod 31, with a diameter of about 3 cm. The retaining plate 33 can be made of 0.5 cm thick hard rubber or 0.2 cm thick stainless steel. It is a gasket with a diameter of 20 cm and a round hole with a diameter of 2 cm in the middle.

[0068] When the soil is in an area with poor address conditions such as soft soil or muddy land, the retaining plate 33 should be used when using the eco-bag fixing part 3, so that the anchor rod can transfer the load to the soil on the ground surface more evenly after being loaded into the soil, thereby reducing the risk of deformation; if the soil address conditions are good, the retaining plate 33 can be omitted.

[0069] After the eco-bag covers the soil drainage ditch as a whole, it can reduce the exposure of the soil in the soil ditch, which can reduce soil weathering and effectively reduce the possibility of ditch collapse; on the other hand, it can reduce the growth of weeds on the ditch surface, reduce the difficulty of daily maintenance, and reduce the possibility of silting up of drainage ditches due to plant growth. Compared with scattered ecological fillers at the bottom of the ditch, the eco-bags that are tightly connected to the ditch bottom, ditch wall, and ditch edge through anchor rods can effectively resist high flow rate and high flow drainage in the ditch during heavy rainfall.

[0070] In this embodiment, the eco-bag body 1, the eco-bag filler 2, and the eco-bag fixing member 3 are simple to manufacture and have low material cost.

[0071] Example 2

[0072] The method provided in this embodiment for transforming the entire cross-section of a farmland soil drainage ditch using the eco-bag in Embodiment 1 comprises the following steps:

[0073] (S1) Clean the farmland soil drainage ditch to expose the original soil layer, and perform arc chamfering on the intersection of the ditch bottom, ditch wall and ditch edge of the farmland soil drainage ditch. The chamfering arc diameter is about 20 cm. Figure 3 As shown;

[0074] (S2) inserting the eco-bag fixing part 3 vertically into the bottom and the edge of the farmland soil drainage ditch, and inserting the eco-bag fixing part 3 obliquely at 45 degrees into the wall of the farmland soil drainage ditch and the edge or bottom of the farmland soil drainage ditch;

[0075] (S3) After tying up the two ends of the eco-bag body 1 filled with the eco-bag filler 2, place the ditch bottom covering section bag body 11 vertically into the ditch bottom and align it with the upper end of the anchor rod 31 of the eco-bag fixing part 3, and completely press down the eco-bag body 1 until the upper end of the anchor rod 31 of the eco-bag fixing part 3 is completely immersed in the eco-bag body 1. Use the same method to complete the fixing of the ditch wall covering section bag body 12 and the ditch edge covering section bag body 13 in sequence until the target farmland soil drainage ditch is completely covered.

[0076] Furthermore, in step (S2), a retaining plate 33 is selected according to the soil conditions, and the retaining plate 33 is inserted into the anchor rod 31 from the end away from the latch 32, and the end of the anchor rod 31 close to the latch 32 is facing upward, and the other end is inserted into the soil until the retaining plate 33 is flush with the soil surface; if the soil conditions are good, the retaining plate 33 is not used, and the anchor rod 31 is inserted into the soil until the latch 32 is flush with the soil surface.

[0077] Specifically, when the soil is in a soft soil layer, muddy land or other areas with poor soil conditions, the retaining plate 33 should be used when the eco-bag fixing part 3 is used, so that the anchor rod can transfer the load to the soil on the surface of the ground more evenly after being stressed, reducing the risk of deformation; if the soil conditions are good, the retaining plate 33 can be omitted. The retaining plate 33 is inserted from the end of the eco-bag fixing part 3 away from the catch 32. From the cross-section, the eco-bag fixing part 3 inserted at the bottom and edge of the ditch needs to be inserted vertically, and the eco-bag fixing part 3 inserted at the ditch wall needs to be inserted at an angle of 45°. In the cross-section, the distance between the eco-bag fixing parts 3 is maintained at 20-30cm (in the vertical distance, the eco-bag fixing parts 3 maintain a distance of 20-30cm). Insert the eco-bag fixing part 3 with the end near the catch 32 facing upwards into the soil until the retaining piece 33 is flush with the soil surface; if the soil condition is good, do not use the retaining piece 33, then insert the eco-bag fixing part 3 into the soil until the catch 32 is flush with the soil surface. Figure 4 shown.

[0078] Specifically, in step (S3), the eco-bag filler 2 is evenly filled into the eco-bag body 1, and after vibrating and filling, the two ends are tied tightly, and the ditch bottom covering section bag body 11 is placed vertically into the ditch bottom, and aligned with the upper end of the eco-bag fixing part 3 inserted in the previous step, and the eco-bag body 1 is completely pressed down until the upper end of the eco-bag fixing part 3 is completely immersed in the eco-bag body 1. According to the above method, the ditch wall covering section bag body 12 and the ditch edge covering section bag body 13 are fixed in sequence. According to the above process, the eco-bag body 1 is installed in sequence until the target ditch is completely covered. Figure 5 shown.

[0079] Part of the water absorbed by the water absorption holes of the bag body 13 of the ditch edge covering section will slowly flow into the bag body 12 of the ditch wall covering section. The ventilation holes opened in the bag body 12 of the ditch wall covering section can provide aerobic decay conditions for the environment inside the bag. The carbon dioxide and other gases produced by aerobic decay are important inorganic carbon sources for denitrification. After dissolving in the flowing water, they enter the bag body 11 of the ditch bottom covering section, providing an inorganic carbon source for denitrification.

[0080] The transformation method of this embodiment is simple, does not require special equipment, and can be applied to the ecological transformation of common farmland soil drainage ditches of various forms and sections.

[0081] The above embodiments are only used to illustrate the present invention, and the protection scope of the present invention is not limited to the above embodiments. A person skilled in the art can achieve the purpose of the present invention based on the above disclosure of the present invention, and any improvement and deformation based on the concept of the present invention shall fall within the protection scope of the present invention, and the specific protection scope shall be subject to the claims.

Claims

1. An eco-bag for ecological transformation of the entire section of farmland soil drainage ditches, characterized in that: It comprises an eco-bag body (1), an eco-bag filler (2) and an eco-bag fixing part (3); The eco-bag body (1) comprises a farmland soil drainage ditch bottom covering section bag body (11), a ditch wall covering section bag body (12) and a ditch edge covering section bag body (13); the ditch bottom covering section bag body (11) is provided with a plurality of rows of uniform plant growth holes on its upper surface; the ditch wall covering section bag body (12) is provided with uniform ventilation holes around its surface; and the ditch edge covering section bag body (13) is provided with uniform water absorption holes; The eco-bag filler (2) is filled into the eco-bag body (1), and the eco-bag filler (2) is mainly composed of lignified garden waste and coarse sand; The eco-bag fixing member (3) comprises an anchor rod (31) and a catch (32), wherein the catch (32) is a circle of protrusions arranged on the anchor rod (31); The anchor rods (31) of the eco-bag fixing parts (3) are vertically inserted into the bottom and edge of the farmland soil drainage ditch, and are obliquely inserted into the walls of both sides of the farmland soil drainage ditch at an angle of 40-45 degrees to the edge or bottom of the farmland soil drainage ditch, and are fixed by means of snaps (32). Two adjacent rows of eco-bag fixing parts (3) are staggered. The ditch bottom covering section bag body (11) is located at the ditch bottom of the farmland soil drainage ditch, the ditch wall covering section bag body (12) is arranged on the ditch wall of the farmland soil drainage ditch, and the ditch edge covering section bag body (13) is arranged on the ditch edge of the farmland soil drainage ditch and is fixed by the ecological bag fixing piece (3).

2. The eco-bag for ecological transformation of the entire section of farmland soil drainage ditches according to claim 1 is characterized in that: The eco-bag body (1) is a long circular tube-shaped bag body with a diameter of 20-25 cm and a bag wall thickness of 2 mm. The length is determined according to the width and depth of the drainage ditch in the farmland soil.

3. The eco-bag for ecological transformation of the entire section of farmland soil drainage ditches according to claim 1 is characterized in that: The upper surface of the ditch bottom covering section bag body (11) is provided with three rows of uniform plant growth holes, the diameter of the plant growth holes is 1-2 cm, and the hole spacing is 2-4 cm; the diameter of the ventilation holes is 0.5-1 cm, and the hole spacing is 2-3 cm; the length of the ditch edge covering section bag body (13) is 50-100 cm, the diameter of the water absorption holes is 1 cm, and the hole spacing is 1-2 cm.

4. The eco-bag for ecological transformation of the entire section of farmland soil drainage ditches according to claim 1 is characterized in that: The particle sizes of the lignified garden waste and the coarse sand are 0.5-1 cm; the mass ratio of the lignified garden waste to the coarse sand is 1:1-1:

2.

5. The eco-bag for ecological transformation of the entire section of farmland soil drainage ditches according to claim 1 is characterized in that: The length of the anchor rod (31) is 60 cm-100 cm, and the rod diameter is 2 cm. The anchor rod (31) is a soil layer non-prestressed full-length anchoring friction type anchor rod, and the material is metal, wood or bamboo. The two ends of the rod body of the anchor rod (31) are elliptical spherical, and the rod body is densely covered with rough dot-shaped protrusions; the latch (32) is a circle of protrusions arranged at a position 10 cm away from one end of the anchor rod (31), and its diameter is 3 cm.

6. The eco-bag for ecological transformation of the entire section of farmland soil drainage ditches according to claim 1 is characterized in that: The eco-bag fixing member (3) further comprises a soil retaining plate (33), which is a gasket with a diameter of 20-25 cm and a circular hole with a diameter of 2 cm in the middle. The soil retaining plate (33) is sleeved on the anchor rod (31) from the end away from the clip (32).

7. A method for transforming the entire cross-section of a farmland soil drainage ditch using the eco-bags described in any one of claims 1 to 6, characterized in that: The following steps are involved: (S1) cleaning the farmland soil drainage ditch to expose the original soil layer, and performing arc chamfering on the intersection of the ditch bottom, ditch wall and ditch edge of the farmland soil drainage ditch; (S2) the eco-bag fixing part (3) is vertically inserted into the bottom and the edge of the farmland soil drainage ditch, and the eco-bag fixing part (3) is obliquely inserted into the wall of the farmland soil drainage ditch and the edge or bottom of the farmland soil drainage ditch at an angle of 40-45 degrees; (S3) After the two ends of the eco-bag body (1) filled with the eco-bag filler (2) are tied tightly, the ditch bottom covering section bag body (11) is placed vertically into the ditch bottom and aligned with the upper end of the anchor rod (31) of the eco-bag fixing part (3), and the eco-bag body (1) is completely pressed down until the upper end of the anchor rod (31) of the eco-bag fixing part (3) is completely immersed in the eco-bag body (1), and the ditch wall covering section bag body (12) and the ditch edge covering section bag body (13) are fixed in sequence in the same manner until the target farmland soil drainage ditch is completely covered.

8. The method according to claim 7, characterized in that The chamfer arc diameter in step (S1) is 20-30 cm.

9. The method according to claim 7, characterized in that: In step (S2), a retaining plate (33) is selected according to the soil condition, and the retaining plate (33) is inserted into the anchor rod (31) from the end away from the locking rod (32), and the end of the anchor rod (31) close to the locking rod (32) is facing upward, and the other end is inserted into the soil until the retaining plate (33) is flush with the soil surface; if the soil condition is good, the retaining plate (33) is not used, and the anchor rod (31) is inserted into the soil until the locking rod (32) is flush with the soil surface.

10. The method according to claim 7, characterized in that The spacing between the eco-bag fixing parts (3) in step (S2) is 20-30 cm.

Images