Planting structure suitable for planting submerged plants

Abstract

The utility model relates to a planting structure suitable for planting submerged plants, which comprises a bearing base, a plurality of planting models arranged in the bearing base and planting matrixes filled in the planting models, a structure main body takes a modified and cut retired wind power blade as the bearing base, the shape advantage of the wind power blade is fully utilized, and the planting models are arranged in the bearing base. An arc-shaped bearing water flow scouring prevention structure is constructed, on the basis of the base, a planting model of a double-layer nested trapezoid body is designed, an optimized planting matrix structure is matched, and the survival rate of submerged plants during planting in a planting matrix and underwater bottom mud is fully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water ecological restoration, and particularly relates to a planting structure suitable for submerged plant planting. Background Technique

[0002] China has a rich total amount of water resources, but the distribution of water resources is uneven. Rivers, lakes and reservoirs are habitats on which humans depend for survival, and submerged plants play a crucial role in the water ecosystem. Submerged plants release oxygen through photosynthesis, absorb carbon dioxide, increase the dissolved oxygen in the water, and provide necessary living conditions for aquatic animals and plants. Submerged plants can also absorb nitrogen and phosphorus in the water body and sediment through roots, leaves and other parts and convert them into their own nutrients, so as to achieve the purpose of purifying water quality and restoring the ecology.

[0003] However, the traditional submerged plant planting method has disadvantages such as low survival rate and low operation rate. Especially in deep water areas and areas with large water flow velocities, either the submerged plants are washed away by the water flow in the initial stage of throwing and cannot reach the bottom of the water, or the newly planted submerged plants are washed away by the fast water flow and are difficult to play a role. Content of the Utility Model

[0004] The purpose of the utility model is to improve the stability and survival rate of submerged plant planting in the process of water ecological restoration, enhance the water ecological restoration effect and landscape effect, and provide a planting structure suitable for submerged plant planting to fully ensure the survival rate of submerged plants when planting in the planting substrate and when colonizing in the bottom sediment.

[0005] To achieve the above purpose, the utility model provides a planting structure suitable for submerged plant planting, which includes a supporting base, a plurality of planting models arranged in the supporting base, and a planting substrate filled in the planting models. The supporting base is made by physically cutting and combining the middle part of a retired wind turbine blade. A bottom surface notch plane is dug at the bottom of the middle part of the leaf of the supporting base, and a wire mesh is covered at the bottom surface notch plane to form a bottom sediment contact net;

[0006] The planting model is a double-layer nested trapezoid body with an upper plane smaller than a lower plane. The double-layer nested trapezoid body includes a planting model inner cavity and a planting model outer cavity. The length and width of the upper and lower planes of the planting model inner cavity are smaller than those of the planting model outer cavity, and the upper and lower planes of the planting model inner cavity and the planting model outer cavity are coplanar. The planting model is arranged on the bottom sediment contact net;

[0007] The planting matrix includes a matrix carrier layer, a connecting layer, a planting layer, and a surface covering layer arranged in sequence from bottom to top in the inner cavity of the planting model, and a degradable nutrient sponge layer and an agar-coconut palm mixed layer arranged in sequence from inside to outside in the outer cavity of the planting model. Submerged plant seeds are arranged in the degradable nutrient sponge layer. The matrix carrier layer includes an upper degradable shaping net, a water chestnut fiber layer, and a lower degradable shaping net arranged in sequence from top to bottom. The connecting layer is a clay layer. The planting layer includes an upper first agar mixed liquid layer, a middle bottom mud layer, and a lower second agar mixed liquid layer. The surface covering layer includes a degradable PP shaping net and a zeolite layer arranged in sequence from bottom to top. A planting port is provided on the surface of the surface covering layer, and submerged plants are planted in the planting port.

[0008] Preferably, the upper plane of the outer cavity of the implant model is 10-15 cm long and wide, the lower plane is 20-25 cm long and wide, and the height is 10-12 cm; the upper and lower planes of the inner cavity of the implant model are 4-6 cm smaller than the outer cavity of the implant model in length and width.

[0009] Preferably, the outer cavity side wall of the implant model is a PVC board; the inner cavity side wall of the implant model includes an outer PVC board and an inner wire mesh with a pore size of 1-2 cm; the upper plane of the implant model is opened, and the lower plane of the implant model is composed of an upper wire mesh and a lower PVC board, and the pore size of the wire mesh is 3-4 cm.

[0010] Preferably, a treated modified zeolite layer with a particle size of 0.5mm-2mm is filled below the water chestnut fiber layer, and the distribution area of the modified zeolite single layer accounts for 65%-80% of the area of the water chestnut fiber layer. The modified zeolite and the water chestnut fiber layer, and the lower degradable shaping net and the lower plane of the planting model are bonded by sodium alginate.

[0011] Preferably, the treatment step of the modified zeolite comprises: soaking in a mixed solution of polyphosphate-accumulating bacteria and nitrifying bacteria for 18-30 hours, and drying in air for 1.5-2.5 hours.

[0012] Preferably, the preparation step of the agar mixture includes: fixing the harvested submerged plants, drying and crushing them into a powdery substance, mixing them in a weight ratio of agar powder: submerged plant powder: zeolite powder = 4:2:1, heating and dissolving them to obtain an agar mixture, wherein the concentration of the agar mixture in the first agar mixture layer is 10 g / L, and the concentration of the agar mixture in the second agar mixture layer is 15 g / L.

[0013] Preferably, the step of preparing the degradable nutrient sponge layer comprises: first soaking the degradable sponge in a nutrient solution, then taking it out and squeezing out part of the nutrient solution until the moisture content is maintained between 60% and 65%;

[0014] The nutrient solution preparation step includes: adding zeolite powder to water-soluble fertilizer, and stirring thoroughly until the zeolite powder is evenly dispersed in the water-soluble fertilizer.

[0015] Preferably, the step of preparing the agar-coconut palm mixed layer comprises: adding coconut palm to a dissolved agar liquid with a concentration of 10 g / L, stirring and mixing uniformly, wherein the volume ratio of agar to coconut palm is 4:1.

[0016] Preferably, the first agar mixture layer and the bottom mud layer constitute a first planting area, the bottom mud layer and the second agar mixture layer constitute a second planting area, and the submerged plants are planted at alternating depths in the first planting area and the second planting area.

[0017] Preferably, a plurality of windows are provided on the side surface of the supporting base, and the windows are formed by removing the side surface portion of the middle portion of the leaf.

[0018] Based on the above technical solution, the advantages of the utility model are:

[0019] This new planting structure consists of a supporting base, a planting model, and a planting matrix. The main structure utilizes a repurposed, cut, and decommissioned wind turbine blade as the supporting base, leveraging the blade's shape to create an arc-shaped support structure that protects against water erosion. Within this base, a double-layer nested trapezoidal planting model is designed, coupled with an optimized planting matrix structure to fully guarantee the survival rate of submerged plants when planted in the planting matrix and the bottom mud.

[0020] 1) The most important feature of this utility model is to improve the survival rate of submerged plant planting, including the survival rate of submerged plants in the planting substrate and the survival rate of submerged plants successfully colonizing and playing a role in the bottom mud, as follows:

[0021] ① The planting structure of the utility model improves the survival rate of submerged plants in the planting matrix by combining the planting of submerged plant seedlings with seed planting, increasing the nutritional components of the planting matrix, and other methods and measures.

[0022] ② The planting matrix within the planting model cavity is designed with different planting depths for submerged plants. This prevents submerged plants from being unable to successfully establish in the bottom mud due to the limited planting depth. Setting different planting depths can improve the success rate of submerged plants in the bottom mud. Different planting depths also ensure that the roots of the submerged plants can fully utilize the nutrients in the planting matrix in the vertical direction, improving the matrix nutrient utilization rate.

[0023] ③ Using the modified and cut retired wind turbine blades as the supporting base can fully utilize the shape advantages of the wind turbine blades to reduce the scouring of underwater water flow, and can be successfully planted even in areas with high water flow rate.

[0024] ④This submerged plant planting structure has a certain weight and is integrally designed, facilitating operations in deep water areas and significantly improving the success rate of planting submerged plants in deep water areas.

[0025] 2) The structure of the present utility model is stable, and multiple planting models can operate centrally to complete the planting at the bottom of the water as a whole, saving operation time and improving operation efficiency.

[0026] 3) The planting structure of the present utility model also realizes the resource utilization of retired wind turbine blades and can also have a certain water body landscape effect at the same time.

[0027] 4) The present utility model adopts an ecological mode combining submerged plants and aquatic animals to promote the restoration of underwater biodiversity, construct a stable water ecosystem, and ensure the healthy and sustainable development of the water ecosystem. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0029] Figure 1 is a schematic structural diagram of the planting model;

[0030] Figure 2 is a schematic diagram of the planting substrate in the inner cavity of the planting model;

[0031] Figure 3 is a schematic diagram of the forming of the supporting base;

[0032] Figure 4 is a top view schematic diagram of the planting model placed in the supporting base. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The technical solutions of the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0034] The present utility model provides a planting structure suitable for planting submerged plants, as Figures 1 to 4 shown, which shows a preferred embodiment of the present utility model.

[0035] Specifically, as Figure 4 shown, the planting structure includes a supporting base 17, a plurality of planting models 20 arranged in the supporting base 17, and a planting substrate filled in the planting models 20. The supporting base 17 is made by physically cutting and combining the middle part 14 of the retired wind turbine blade. A bottom surface notch plane is dug at the bottom of the middle part 14 of the supporting base 17, and a wire mesh is covered at the bottom surface notch plane to form a bottom mud contact net 18.

[0036] As shown Figure 1 in the figure, the planting model is a double-layer nested trapezoid with an upper plane smaller than the lower plane. The double-layer nested trapezoid includes a planting model inner cavity 5 and a planting model outer cavity 9. The length and width of the upper and lower planes of the planting model inner cavity 5 are smaller than those of the planting model outer cavity 9, and the upper and lower planes of the planting model inner cavity 5 and the planting model outer cavity 9 are coplanar. The planting model is arranged on the sediment contact net 18.

[0037] As shown Figure 1 and Figure 2 in the figure, the planting substrate includes a substrate carrier layer 1, a connection layer 2, a planting layer 3, a surface covering layer 4 arranged in sequence from bottom to top in the planting model inner cavity 5, and a degradable nutrient sponge layer 6 and an agar-coconut coir mixed layer 7 arranged in sequence from inside to outside in the planting model outer cavity 9. The degradable nutrient sponge layer 6 is provided with submerged plant seeds 8. The substrate carrier layer 1 includes an upper degradable shaping net, a Potamogeton crispus fiber layer, and a lower degradable shaping net arranged in sequence from top to bottom. The connection layer 2 is a clay layer. The planting layer 3 includes an upper first agar mixture layer 3-1, a middle sediment layer 3-2, and a lower second agar mixture layer 3-3. The surface covering layer 4 includes a degradable PP shaping net and a zeolite layer arranged in sequence from bottom to top. The surface of the surface covering layer 4 is provided with planting openings, and submerged plants 10 are planted in the planting openings.

[0038] As shown Figure 3 in the figure, the supporting base 17 is mainly made of retired wind turbine blades, and the retired wind turbine blades are simply physically cut and arranged. The retired wind turbine blades are divided into three parts: the blade tip 15, the blade middle 14, and the blade root 13. The blade root 13 and the blade tip 15 parts are removed, and the blade middle 14 part is cut into two symmetrical parts along the longitudinal section cutting line 16, and only the part with a width of 0.8 m - 2 m of the blade middle 14 is retained. Then this part is further cut into several sections, and the length of each section varies from 100 cm to 150 cm. The remaining wind turbine blades after cutting are placed with the arc-shaped side facing down, and the surface in contact with the ground in the middle of the blade is dug out. A wire mesh with a hole diameter of 5 cm - 10 cm is covered and fixed at the blade notch with rivets to serve as the sediment contact net 18, which is mainly used as the contact surface between the supporting base and the sediment and the lower plane of the planting model.

[0039] Preferably, a plurality of windows 19 are provided on the side surface of the supporting base 17, and the windows 19 are formed by digging out the side part of the blade middle 14 part. Specifically, a plurality of windows 19 are dug out on the arc-shaped side surface of the wind turbine blade for the exchange of water flow inside the base. The position and number of the windows 19 are determined according to factors such as the blade curvature, the base size, the water flow velocity, and the water depth. This supporting base makes full use of the shape advantage of the wind turbine blade, can effectively reduce the scouring of the water flow on the submerged plants, improve the survival rate of the submerged plants, and improve the operation rate of the submerged plant planting.

[0040] As Figure 1 shown, the planting model is a double-layer nested frustum of a pyramid, with the length and width of the upper plane smaller than those of the lower plane. Among them, the length and width of the upper plane of the outer cavity 9 of the planting model are 10-15 cm, the length and width of the lower plane are 20-25 cm, and the length and width of the upper and lower planes of the inner cavity 5 of the planting model are about 4-6 cm smaller than those of the outer layer model. The height of the model is 10-12 cm. The side wall of the outer cavity 9 of the planting model is made of PVC board, and the side wall of the inner cavity 5 of the planting model is composed of a PVC board and a wire mesh with a pore diameter of 1-2 cm. From the inside to the outside, it is wire mesh and PVC board. The inner and outer layers of the side wall of the model have a certain degree of support by means of the PVC board. The upper plane of the model is open, and the lower plane is composed of a wire mesh and a PVC board. The wire mesh is located above the PVC board, and the pore diameter is 3-4 cm. Except that the PVC boards on the side walls of the inner and outer layer models and the PVC board on the lower plane are detachable, other structures are fixed.

[0041] According to the structural characteristics of the planting model, the planting substrate is divided into two parts, which are located in the inner cavity 5 and the outer cavity 9 of the planting model respectively. The inner cavity 5 of the planting model is mainly used for the insertion of seedlings of submerged plants 10, and the outer cavity 9 of the planting model is mainly used for the planting of seeds 8 of submerged plants.

[0042] The inner cavity 5 of the planting model successively includes a substrate carrier layer 1, a connection layer 2, a planting layer 3, and a surface covering layer 4 from bottom to top. Among them, the overall thickness of the substrate carrier layer 1 is about 1.5-2 cm, which is located at the bottom layer of the entire planting structure and is in direct contact with the bottom sediment of the water. From top to bottom, it is an upper degradable shaping net, a Potamogeton crispus fiber layer, and a lower degradable shaping net. Treated modified zeolite with a particle size of 0.5 mm-2 mm is filled at a position below the Potamogeton crispus fiber layer. The single-layer distribution area of the modified zeolite accounts for 65%-80% of the plane area of the Potamogeton crispus fiber layer. The modified zeolite and the Potamogeton crispus fiber layer, and the lower degradable shaping net and the lower plane of the model are bonded by sodium alginate.

[0043] Furthermore, the treatment method of the modified zeolite is: soak it in a mixed solution of polyphosphate bacteria and nitrifying bacteria for 24 hours and dry it in the air for about 2 hours. The setting of the substrate carrier layer 1 can adsorb pollutants in the sediment, reduce the nitrogen and phosphorus concentration, and is beneficial to the colonization of the roots of submerged plants.

[0044] The connection layer 2 is about 1-1.5 cm thick, mainly clay, connecting the substrate carrier layer 1 and the planting layer 3, and at the same time increasing the weight of the planting substrate.

[0045] The planting layer 3 is divided into three layers, including the first agar mixture layer 3-1 in the upper layer, the bottom mud layer 3-2 in the middle layer, and the second agar mixture layer 3-3 in the lower layer. The agar mixture layer is about 3-4 cm, and the bottom mud layer is about 1-2 cm. Preparation process of the agar mixture: After harvesting, the submerged plants are blanched, dried, and crushed into powdery substances, and then mixed according to the weight ratio of agar powder: submerged plant powder: zeolite powder = 4:2:1, and heated and dissolved to obtain the agar mixture. Among them, the concentration of the agar mixture in the first agar mixture layer 3-1 is 10 g / L, and the concentration of the agar mixture in the second agar mixture layer 3-3 is 15 g / L. Compared with single agar, this agar mixture can provide more nutrients for submerged plants. The submerged plant powder is rich in nitrogen and phosphorus, and the zeolite powder is rich in various minerals and trace elements, which can better promote plant growth. Different concentration settings also provide more choices for the optimal nutrient content for the growth of submerged plants. The bottom mud is processed, dried, and crushed. After testing, it contains no heavy metals and no organic pollutants, and the nutrients such as nitrogen and phosphorus meet the relevant regulations. An appropriate amount of AM fungal inoculum is added to the bottom mud and mixed evenly for standby. After the AM fungal inoculum colonizes the roots, it can improve the resistance and survival rate of submerged plants in the planting substrate.

[0046] The surface covering layer 4 is a degradable PP shaping net, and the shaping net is evenly covered with zeolites with a particle size of 2-3 mm. The shaping net and the zeolites are bonded by sodium alginate, and this structure can improve the stability and air permeability of the planting substrate. The surface covering layer 4 reserves 2-3 planting openings according to the types of submerged plants and the size of the seedlings, and the diameter of the planting openings is 3-5 cm.

[0047] The outer cavity 9 of the planting model mainly includes a degradable nutrient sponge layer 6, an agar-coconut coir mixed layer 7, and submerged plant seeds 8 located in the degradable nutrient sponge layer 6. From the inside to the outside, they are the degradable nutrient sponge layer 6 and the agar-coconut coir mixed layer 7 in sequence. The degradable sponge layer 6 is about 1 cm thick. First, it is soaked in the nutrient solution, and then taken out and squeezed to remove some water until the moisture content is maintained between 60%-65%. This humidity is suitable for seed germination. Among them, the preparation method of the nutrient solution: A small amount of zeolite powder is added to the water-soluble fertilizer and stirred evenly until the zeolite powder is evenly dispersed in the water-soluble fertilizer. Adding zeolite powder in this step can promote the early vegetative growth of submerged plant seeds.

[0048] Preferably, the preparation steps of the agar-coconut coir mixed layer 7 include: adding coconut coir to the dissolved agar liquid with a concentration of 10 g / L, and stirring appropriately to make it evenly mixed. The volume ratio of agar to coconut coir is about 4:1, which increases the air permeability and shear resistance of the substrate. The degradable nutrient sponge layer 6 and the wire mesh on the side wall of the inner cavity 5 of the planting model are also bonded by sodium alginate.

[0049] When using the planting structure of the present invention, a double-layer nested planting model is placed on a flat surface. The inner cavity 5 of the planting model is first filled, followed by the matrix carrier layer 1, the connecting layer 2, the planting layer 3, and the surface covering layer 4. A corresponding volume of agar mixture is first added to the planting layer 3. After cooling to form a solid gel, treated reserve sediment is added, maintaining the sediment moisture content at 30%-50%. Finally, the remaining corresponding volume of agar mixture is added, and after cooling, the mixture forms the planting layer 3.

[0050] like Figure 2 As shown, the first agar mixture layer 3-1 and the bottom mud layer 3-2 constitute the first planting area 11, and the bottom mud layer 3-2 and the second agar mixture layer 3-3 constitute the second planting area 12. The submerged plants are planted at staggered depths within the first planting area 11 and the second planting area 12. The optimal planting depth is midway between the first planting area 11 and the second planting area 12, and there are 1-2 planting openings. Before planting the submerged plants, the roots are properly pruned and adjusted, and the roots are soaked in a mixture of nitrifying bacteria solution, polyphosphate bacteria solution, and a water retaining agent for 12 hours.

[0051] The PP shaping net of surface covering layer 4 is connected and fixed with the wire mesh four corners of planting model inner cavity 5 sidewalls.After the planting matrix of planting model inner cavity 5 is stable, the filling of outer cavity planting matrix is carried out. Remove the PVC board of inner layer model sidewall, only leave the wire mesh of aperture 1-2cm, lay degradable nutrient sponge along the wire mesh, thickness is about 1cm, submerged plant seeds 9 are positioned over degradable nutrient sponge layer 6 inside, and only evenly place in the lower half of degradable nutrient sponge layer 6, each side is placed submerged plant seeds 2-3 grain. This submerged plant seed is processed through seed dressing agent, forms the coating film with certain function and package strength, and this seed dressing agent auxiliary component is mainly micro-fertilizer, plant growth regulator, water-retaining agent etc., can improve the growth and the germination ability of submerged plant seed. Configuration agar-coconut palm mixed liquor, when the temperature is reduced to about 50 degree, joins into planting model outer cavity 9 and waits for cooling and solidifying.

[0052] After filling the planting matrix within the planting model, remove the PVC panels on the side walls of the outer cavity 9 of the planting model. Cultivate the submerged plant seeds under suitable temperature, humidity, and light conditions for a week until they germinate. Meanwhile, complete the planting of the submerged plant seedlings within the inner cavity. After planting, remove the PVC panels on the lower surface of the planting model, exposing the wire mesh on the lower surface. Arrange several planting models in sequence on the supporting base 17, connecting them via the wire mesh to form a complete planting structure. The number of planting models placed within a single supporting base depends on the density of the submerged plants being planted. The arrangement can be neatly arranged side by side or freely combined to create a certain landscape.

[0053] Place the planting structure at the bottom of the water to complete the planting of submerged plants. The planting structure with a larger arc of the supporting base 17 is applied to waters with relatively rapid water flow and deeper water depth, and the planting structure with a smaller arc of the supporting base 17 is applied to waters with relatively slow water flow. After the planting structure is placed at the bottom of the water for 2-3 days, several aquatic animals are placed in the supporting base 17, which can improve the water transparency, provide good conditions for the growth of submerged plants, and promote the restoration of the biodiversity at the bottom. The selection of the submerged plants 10 is generally Vallisneria natans, Potamogeton pectinatus, Ceratophyllum demersum, Hydrilla verticillata, etc., and the aquatic animals in the water body are fish, shrimps, shellfish, etc., which can promote the restoration of the biodiversity at the bottom, build a stable water ecosystem, and ensure the healthy and sustainable development of the water ecosystem.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific implementation manners of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A planting structure suitable for the planting of submerged plants, characterized in that: It includes a supporting base (17), a plurality of planting models (20) arranged in the supporting base (17), and planting substrates filled in the planting models (20). The supporting base (17) is physically cut and combined from the middle part (14) of a retired wind turbine blade. The bottom surface notch plane is formed by digging out the bottom of the middle part (14) of the blade in the supporting base (17), and a wire mesh is covered at the bottom surface notch plane to form a bottom mud contact net (18). The planting model (20) is a double-layer nested trapezoid with an upper plane smaller than the lower plane. The double-layer nested trapezoid includes a planting model inner cavity (5) and a planting model outer cavity (9). The length and width of the upper and lower planes of the planting model inner cavity (5) are smaller than those of the planting model outer cavity (9), and the upper and lower planes of the planting model inner cavity (5) and the planting model outer cavity (9) are coplanar. The planting model is arranged on the bottom mud contact net (18). The planting substrates include a substrate carrier layer (1), a connecting layer (2), a planting layer (3), a surface covering layer (4) arranged in sequence from bottom to top in the planting model inner cavity (5), and a degradable nutrient sponge layer (6), an agar-coconut palm mixed layer (7) arranged in sequence from inside to outside in the planting model outer cavity (9). Submerged plant seeds (8) are arranged in the degradable nutrient sponge layer (6). The substrate carrier layer (1) includes an upper degradable shaping net, a potamogeton crispus fiber layer, and a lower degradable shaping net arranged in sequence from top to bottom. The connecting layer (2) is a clay layer. The planting layer (3) includes a first agar mixed liquid layer (3-1) in the upper layer, a bottom mud layer (3-2) in the middle layer, and a second agar mixed liquid layer (3-3) in the lower layer. The surface covering layer (4) includes a degradable PP shaping net and a zeolite layer arranged in sequence from bottom to top. Plugging ports are arranged on the surface of the surface covering layer (4), and submerged plants (10) are plugged in the plugging ports.

2. The planting structure according to claim 1, characterized in that: The length and width of the upper plane of the planting model outer cavity (9) are 10-15 cm, the length and width of the lower plane are 20-25 cm, and the height is 10-12 cm. The length and width of the upper and lower planes of the planting model inner cavity (5) are each 4-6 cm smaller than those of the planting model outer cavity (9).

3. The planting structure according to claim 1, characterized in that: The side wall of the planting model outer cavity (9) is a PVC board. The side wall of the planting model inner cavity (5) includes a PVC board on the outside and a wire mesh with a pore diameter of 1-2 cm on the inside. The upper plane of the planting model is open, and the lower plane of the planting model is composed of a wire mesh on the upper side and a PVC board on the lower side. The pore diameter of the wire mesh is 3-4 cm.

4. The planting structure according to claim 1, characterized in that: A treated modified zeolite layer with a particle size of 0.5 mm - 2 mm is filled at a position slightly lower than the potamogeton crispus fiber layer. The single-layer distribution area of the modified zeolite accounts for 65% - 80% of the area of the potamogeton crispus fiber layer. The modified zeolite and the potamogeton crispus fiber layer, and the lower degradable shaping net and the lower plane of the planting model are bonded through sodium alginate.

5. The planting structure according to claim 1, characterized in that: The first agar mixture layer (3-1) and the sediment layer (3-2) form the first planting area (11), the sediment layer (3-2) and the second agar mixture layer (3-3) form the second planting area (12), and the submerged plants are planted at staggered depths within the first planting area (11) and the second planting area (12).

6. The planting structure according to claim 1, wherein: A plurality of windows (19) are provided on the side surface of the supporting base (17), and the windows (19) are formed by removing a part of the side surface of the middle part of the leaf (14).

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