Symbiotic freshwater shrimp green culture system and method based on localized film laying

Abstract

The invention discloses a symbiotic freshwater shrimp green culture system and method based on localized film laying, and belongs to the technical field of aquaculture, and the technical scheme is as follows: geomembranes are laid on the pond wall and the pond bottom of a pond, the geomembranes are fixed through ground nails and gaskets, joints are bonded through hot melt adhesive, and the geomembranes form a main shrimp channel, a longitudinal auxiliary shrimp channel and a transverse auxiliary shrimp channel; the enclosed exposed pond bottom grids are used for planting aquatic plants; a long PVC drainage pipe with dense small holes is laid at the bottom of the pond, the front end is sealed by a plug, and the tail end is connected with a valve to control drainage; sectional type self-sinking nanometer aeration pipes are laid in the same direction of the drainage pipe, and multi-point sectional type bottom aeration is achieved through connection of a main ventilation pipe and a roots blower; the culture system comprises several nutritional levels of shrimps, aquatic plants, chubs and escargots to form a symbiotic system. The system is mainly used for green ecological breeding of freshwater shrimps, can effectively maintain the water body to be clear and guarantee stable growth of aquatic plants, realizes self-purification of water quality through multi-nutrition-level symbiosis, and improves the stability of the breeding system and the breeding capacity of a unit area.

Description

Technical Field

[0001] This invention belongs to the field of aquaculture technology, specifically relating to the construction of freshwater shrimp ecological farming and localized film-laying farming systems. Background Technology

[0002] Freshwater shrimp farming holds a significant position in aquaculture due to its short farming cycle, stable profits, and flexible farming methods. Currently, freshwater shrimp production accounts for a large proportion of total shrimp production in my country, with many species possessing high economic value. The industry currently widely adopts a farming model of planting aquatic plants in earthen ponds before raising shrimp. However, as farming scale expands, available pond resources are becoming increasingly saturated, making it crucial to increase farming productivity per unit area a key need for the industry's development.

[0003] The existing earthen pond aquaculture shrimp farming model has many prominent problems. The pond bottom is mostly muddy or sandy, and the shrimp's activity and aeration operations during the farming process easily lead to water turbidity. Especially in the middle and later stages of farming, the turbid water makes it difficult for aquatic plants to receive sunlight, causing mass mortality and damaging the foundation of the aquaculture ecosystem. It can also cause shrimp to become filthy on their bodies and gills. Regarding aeration, conventionally used impeller or paddlewheel aeration equipment is not only energy-intensive and inefficient, but it also violently agitates the water during operation, further exacerbating turbidity and creating a vicious cycle.

[0004] In terms of aquatic plant management and aquaculture space utilization, the existing model suffers from an unreasonable aquatic plant layout, with most plants concentrated in the middle of the pond. Furthermore, farmers' overemphasis on the role of aquatic plants leads to their excessive area allocation, severely restricting shrimp activity space and the actual usable aquaculture space, thus increasing the difficulty of aquatic plant management. Simultaneously, the existing aquaculture system only includes two trophic levels: shrimp and aquatic plants. Uneaten feed and excrement from shrimp farming cannot be effectively and promptly purified, resulting in the proliferation of microalgae in the water. These microalgae compete with aquatic plants for nutrients and light, reducing water transparency and consequently affecting the normal growth of aquatic plants, disrupting the aquaculture ecological balance.

[0005] To address the aforementioned issues, some improved technologies have emerged in related fields, but none have formed a systematic solution. For example, some patents, such as CN120898752A, use microbial flocs for water quality control but do not involve targeted planting of aquatic plants, bottom mulching, or multi-trophic-level biological symbiosis design; some patents, such as CN117770185A, divide the pond into aquaculture ponds and biological purification ponds, failing to achieve in-situ shrimp-grass-fish-snail symbiosis and making it difficult to utilize aquatic plants to provide habitat and shelter for shrimp; and patent CN114946724A only optimizes aquaculture effects by increasing the types of aquatic plants without comprehensively improving core issues such as water turbidity, oxygenation efficiency, and nutrient circulation, thus failing to fully resolve the shortcomings of existing aquaculture systems. Summary of the Invention

[0006] The purpose of this invention is to provide a symbiotic freshwater shrimp green aquaculture system and method based on localized film laying, which solves the problems of water turbidity leading to aquatic plant death, low oxygenation efficiency, and difficulty in controlling aquatic plant growth in existing aquaculture systems.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect, the present invention provides a symbiotic freshwater shrimp green aquaculture system based on localized membrane laying, comprising: a pond, a geomembrane, a drainage pipe, a valve, a segmented self-sinking nano-aeration pipe, a main ventilation pipe, and a blower. The geomembrane is laid on the pond walls and bottom, forming a main shrimp channel, a longitudinal secondary shrimp channel, and a transverse secondary shrimp channel on the pond bottom. The main shrimp channel, the longitudinal secondary shrimp channel, and the transverse secondary shrimp channel enclose and form an exposed pond bottom grid. The drainage pipe is located on the pond bottom, and the valve is connected to the end of the drainage pipe to control drainage. The segmented self-sinking nano-aeration pipe is laid on the pond bottom. One end of the main ventilation pipe is connected to the segmented self-sinking nano-aeration pipe, and the other end of the main ventilation pipe is connected to the blower. Aquatic plants are planted in the exposed pond bottom grid. Shrimp, silver carp, and snails are placed in the water of the pond. The planted aquatic plants, shrimp, silver carp, and snails form a symbiotic system with the aquatic plants.

[0009] In one possible implementation, the geomembrane includes a fully enclosed geomembrane laid on the pond banks and pond walls, a main shrimp passage geomembrane laid around the pond bottom, a longitudinal secondary shrimp passage geomembrane laid on the pond bottom, and a transverse secondary shrimp passage geomembrane. The geomembrane is fixed to the pond banks, pond walls, and pond bottom by ground nails and gaskets, and the joints of the geomembrane are bonded with geomembrane-specific hot melt adhesive.

[0010] In one possible implementation, the drainage pipe is laid along the geomembrane direction of the longitudinal or transverse secondary shrimp channel in the center of the pond bottom. The length of the drainage pipe at the pond bottom is half the width of the pond bottom. The front end of the drainage pipe is sealed with a plug. The front 1 / 4 of the drainage pipe is densely covered with drainage holes, which are evenly distributed on the pipe wall.

[0011] In one possible implementation, the segmented self-sinking nano-aeration pipe is laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano-aeration pipe is connected to the main ventilation pipe. The end of the main ventilation pipe away from the segmented self-sinking nano-aeration pipe is connected to the air outlet of the blower. The segmented self-sinking nano-aeration pipe is distributed at multiple points on the bottom of the pond.

[0012] In one possible implementation, the longitudinal and transverse secondary shrimp passage geomembranes are arranged in a crisscross pattern, with a preset distance maintained between the longitudinal and transverse secondary shrimp passage geomembranes and between the secondary shrimp passage geomembranes and the main shrimp passage geomembrane, together forming multiple evenly distributed exposed pond bottom squares, and the aquatic plants are fixedly planted at the bottom of each of the exposed pond bottom squares.

[0013] In one possible implementation, the shrimp, silver carp, and snails all live in the water of the pond. The snails feed on the shrimp's leftover food and feces, the silver carp filter microalgae in the water, the aquatic plants interact with the water of the pond, and the shrimp inhabit the main shrimp passage, secondary shrimp passage, and the area around the aquatic plants, forming a symbiotic aquaculture structure of shrimp, grass, fish, and snails.

[0014] In one possible implementation, the drainage pipe is made of a long PVC pipe, the plug is detachably connected to the front end of the drainage pipe, the valve is fixedly connected to the end of the drainage pipe, the pipe wall of the drainage pipe is tightly fitted to the geomembrane at the bottom of the pool, and the drainage holes have a uniform diameter and penetrate the pipe wall of the drainage pipe.

[0015] Secondly, this invention provides a symbiotic freshwater shrimp green aquaculture method based on localized membrane laying, comprising: laying a geomembrane on the pond wall and bottom, so that the geomembrane forms a main shrimp channel, a longitudinal secondary shrimp channel, a transverse secondary shrimp channel, and an exposed pond bottom grid formed by the geomembrane; installing a drainage pipe and a segmented self-sinking nano-aeration pipe on the pond bottom; planting aquatic plants in the exposed pond bottom grid; releasing shrimp, silver carp, and snails into the pond; increasing oxygen through the segmented self-sinking nano-aeration pipe; and regulating the water body through the drainage pipe, thereby realizing the symbiotic aquaculture of shrimp, grass, fish, and snails.

[0016] In one possible implementation, when laying the geomembrane, ground nails and gaskets are used to fix the geomembrane to the pond embankment, pond wall, and pond bottom. The seams of the geomembrane are bonded with geomembrane-specific hot melt adhesive. When installing the drainage pipe, the drainage pipe is laid along the direction of the secondary shrimp channel in the center of the pond bottom. The front end of the drainage pipe is sealed with a plug. A valve is connected to the end of the drainage pipe to control drainage. When installing the segmented self-sinking nano-aeration pipe, the segmented self-sinking nano-aeration pipe is laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano-aeration pipe is connected to the main ventilation pipe, and then the main ventilation pipe is connected to a Roots blower.

[0017] In one possible implementation, after laying the geomembrane and installing the relevant equipment, the pond is disinfected, water is added to the pond to a preset depth to cultivate aquatic plants, and the water depth is gradually increased after the aquatic plants have grown steadily. Shrimp fry are first introduced into the pond, and after the shrimp fry have been raised for a period of time, snails are introduced, and after a period of further raising, silver carp are introduced. During the raising process, oxygen is continuously increased through the segmented self-sinking nano-aeration pipe, and sewage is regularly discharged and water is changed through the drainage pipe.

[0018] Compared with the prior art, the advantages of this invention are as follows:

[0019] The localized laying of geomembrane on the pond walls and bottom isolates a large area of ​​silt from the pond bottom and walls, leaving only exposed, grid-like areas for aquatic plant cultivation. This reduces the disturbance of silt caused by shrimp activity and aeration operations at the source. Compared to existing earthen pond aquaculture where silt causes water turbidity, this structure effectively maintains water clarity, allows aquatic plants sufficient sunlight, prevents mass mortality, and alleviates the problem of shrimp bodies and gills becoming dirty due to turbid water, thus improving the stability of the aquaculture system. Furthermore, the aquatic plant growth area is strictly confined to the exposed grid areas on the pond bottom, ensuring even distribution. This reduces the workload of aquatic plant management and prevents excessive aquatic plant growth from encroaching on shrimp activity space, expanding the actual usable space for aquaculture and solving the problems of unreasonable aquatic plant layout and excessive proportion in existing technologies.

[0020] A long PVC drainage pipe with numerous tiny holes is laid along the secondary shrimp passageway at the bottom of the pond, with the front end sealed by a plug. The densely packed drainage holes on the pipe wall significantly increase the effective drainage area. Compared to existing technologies such as pond corner slope drainage pipes or centrally buried sewage pipes at the bottom of the pond, this drainage pipe can be installed without digging, making it much simpler to operate. The even distribution of drainage holes significantly improves sewage discharge efficiency, and the small-diameter design prevents shrimp from being sucked in. At the same time, the dispersed drainage path reduces the risk of blockage, solving the drawbacks of existing drainage methods such as high drainage pressure, easy blockage, or shrimp sucking.

[0021] Segmented self-sinking nano-aeration pipes are laid along the drainage pipe on the geomembrane at the bottom of the pond. They are connected to a Roots blower via the main ventilation pipe, enabling multi-point, segmented bottom aeration throughout the pond. Compared to existing paddlewheel or impeller-type aeration equipment, this method eliminates the need for vigorous water agitation, avoiding the problem of increased turbidity during aeration. Simultaneously, multi-point, segmented aeration allows oxygen to diffuse more evenly throughout the water, resulting in higher aeration efficiency and lower power consumption, thus reducing energy consumption during aquaculture and solving the problems of low efficiency and high energy consumption in existing aeration technologies.

[0022] This aquaculture system incorporates shrimp, aquatic plants, silver carp, and snails at several different trophic levels, forming a complete symbiotic system, which is significantly different from existing aquaculture systems that only include shrimp and aquatic plants. Snails feed on uneaten feed and excrement from shrimp farming, effectively purifying organic waste in the water. Silver carp filter microalgae from the water, reducing competition between microalgae and aquatic plants for nutrients and light, improving water transparency, and creating favorable conditions for aquatic plant growth. This multi-trophic-level symbiotic structure constructs a stable artificial aquaculture ecosystem, allowing the aquatic environment to self-regulate and purify, eliminating the need for large investments in water purification equipment or chemicals, reducing aquaculture costs, and ensuring the long-term stable growth of aquatic plants while providing a good habitat and shelter for shrimp. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the planar structure of a localized membrane-coated symbiotic freshwater shrimp farming pond according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic cross-sectional view of a localized membrane-coated symbiotic freshwater shrimp farming pond according to an embodiment of the present invention.

[0026] Figure 3 This is a schematic diagram of the drainage pipe structure of a localized membrane-coated symbiotic freshwater shrimp farming system according to an embodiment of the present invention;

[0027] The components include: 1. Geomembrane; 2. Pond wall; 3. Main shrimp channel; 4. Longitudinal secondary shrimp channel; 5. Transverse secondary shrimp channel; 6. Exposed pond bottom grid; 7. Drainage pipe; 7-1. Plug; 7-2. Drainage hole; 8. Valve; 9. Segmented self-sinking nano aeration pipe; 10. Main air pipe; 11. Aquatic plants. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] Example:

[0030] It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0031] See Figures 1 to 3 This embodiment provides a symbiotic freshwater shrimp aquaculture system based on localized membrane laying, including: a pond, a geomembrane, a drainage pipe, a valve, a segmented self-sinking nano-aeration pipe, a main ventilation pipe, and a blower. The geomembrane is laid on the pond walls and bottom, forming a main shrimp channel, a longitudinal secondary shrimp channel, and a transverse secondary shrimp channel on the pond bottom. The main shrimp channel, the longitudinal secondary shrimp channel, and the transverse secondary shrimp channel enclose and form an exposed pond bottom grid. The drainage pipe is located on the pond bottom, and the valve is connected to the end of the drainage pipe to control drainage. The segmented self-sinking nano-aeration pipe is laid on the pond bottom. One end of the main ventilation pipe is connected to the segmented self-sinking nano-aeration pipe, and the other end of the main ventilation pipe is connected to the blower. Aquatic plants are planted in the exposed pond bottom grid. Shrimp, silver carp, and snails are placed in the water of the pond. The planted aquatic plants, shrimp, silver carp, and snails form a symbiotic system with the aquatic plants.

[0032] Specifically, the pond can be a rectangular earthen pond with an area of ​​5 mu (approximately 0.33 hectares) and a depth of 1.2 m; the geomembrane can be a black HDPE geomembrane; the drainage pipe can be a long PVC pipe; the segmented self-sinking nano-aeration pipe can be a rubber aeration pipe with a pore size of 10 μm; the main shrimp channel can be a channel with a width of 2.5 m around the bottom of the pond; the exposed pond bottom grid can be a square area with a side length of 1.5 m; the aquatic plants can be *Hydrilla verticillata*; the shrimp can be *Macrobrachium rosenbergii*; the silver carp can be *Silver carp*; the snails can be *Viviparus sinensis*; and the blower can be a Roots blower.

[0033] In one possible implementation, the geomembrane includes a fully enclosed geomembrane laid on the pond banks and pond walls, a main shrimp passage geomembrane laid around the pond bottom, a longitudinal secondary shrimp passage geomembrane laid on the pond bottom, and a transverse secondary shrimp passage geomembrane. The geomembrane is fixed to the pond banks, pond walls, and pond bottom by ground nails and gaskets, and the joints of the geomembrane are bonded with geomembrane-specific hot melt adhesive.

[0034] Specifically, the fully enclosed geomembrane can be an 8m wide black HDPE geomembrane; the main shrimp passage geomembrane can be a 2.5m wide black geomembrane; the longitudinal secondary shrimp passage geomembrane can be a 2m wide black geomembrane; the ground nails can be 20cm long garden-specific ground nails; the gaskets can be 5cm diameter rubber gaskets; and the geomembrane-specific hot melt adhesive can be HDPE-specific adhesive.

[0035] In one possible implementation, the drainage pipe is laid along the geomembrane direction of the longitudinal or transverse secondary shrimp channel in the center of the pond bottom. The length of the drainage pipe at the pond bottom is half the width of the pond bottom. The front end of the drainage pipe is sealed with a plug. The front 1 / 4 of the drainage pipe is densely covered with drainage holes, which are evenly distributed on the pipe wall.

[0036] Specifically, the drain pipe can be a PVC pipe with a diameter of 50mm; the plug can be a plastic plug that matches the PVC pipe; the drain hole can be a circular hole with a diameter of 3mm; the width of the pool bottom can be 20m, and the length of the drain pipe at the bottom of the pool is 10m.

[0037] In one possible implementation, the segmented self-sinking nano-aeration pipe is laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano-aeration pipe is connected to the main ventilation pipe. The end of the main ventilation pipe away from the segmented self-sinking nano-aeration pipe is connected to the air outlet of the blower. The segmented self-sinking nano-aeration pipe is distributed at multiple points on the bottom of the pond.

[0038] Specifically, the segmented self-sinking nano-aeration pipe can be a 5m long self-sinking rubber aeration pipe; the main air pipe can be a 32mm diameter PVC air pipe; the blower can be a 1.5kW Roots blower; and the multi-point distribution can be an aeration point set every 2m, with a total of hundreds of aeration points.

[0039] In one possible implementation, the longitudinal and transverse secondary shrimp passage geomembranes are arranged in a crisscross pattern, with a preset distance maintained between the longitudinal and transverse secondary shrimp passage geomembranes and between the secondary shrimp passage geomembranes and the main shrimp passage geomembrane, together forming multiple evenly distributed exposed pond bottom squares, and the aquatic plants are fixedly planted at the bottom of each of the exposed pond bottom squares.

[0040] Specifically, the preset spacing can be 1.5m; the exposed pond bottom grid can be a square with a side length of 1.5m; the aquatic plants can be *Hydrilla verticillata*; and the even distribution can be formed by enclosing a 5-acre pond to form about 1700 grids.

[0041] In one possible implementation, the shrimp, silver carp, and snails all live in the water of the pond. The snails feed on the shrimp's leftover food and feces, the silver carp filter microalgae in the water, the aquatic plants interact with the water of the pond, and the shrimp inhabit the main shrimp passage, secondary shrimp passage, and the area around the aquatic plants, forming a symbiotic aquaculture structure of shrimp, grass, fish, and snails.

[0042] Specifically, the shrimp can be giant freshwater prawns; uneaten feed can be formulated feed that has not been consumed by the shrimp; microalgae can be cyanobacteria and green algae in the water; the interaction can be aquatic plants absorbing nitrogen and phosphorus nutrients in the water and releasing oxygen.

[0043] In one possible implementation, the drainage pipe is made of a long PVC pipe, the plug is detachably connected to the front end of the drainage pipe, the valve is fixedly connected to the end of the drainage pipe, the pipe wall of the drainage pipe is tightly fitted to the geomembrane at the bottom of the pool, and the drainage holes have a uniform diameter and penetrate the pipe wall of the drainage pipe.

[0044] Specifically, the long PVC pipe can be a rigid UPVC pipe with a diameter of 50mm; the detachable connection can be a threaded connection; the fixed connection can be a threaded connection with sealant; the drainage hole diameter can be 3mm, penetrating the pipe wall to form a through channel.

[0045] This embodiment also provides a symbiotic freshwater shrimp green aquaculture method based on localized membrane laying, including: laying a geomembrane on the pond wall and bottom, so that the geomembrane forms a main shrimp channel, a longitudinal secondary shrimp channel, a transverse secondary shrimp channel, and an exposed pond bottom grid formed by the geomembrane; installing a drainage pipe and a segmented self-sinking nano-aeration pipe on the pond bottom; planting aquatic plants in the exposed pond bottom grid; releasing shrimp, silver carp, and snails into the pond; increasing oxygen through the segmented self-sinking nano-aeration pipe; and regulating the water body through the drainage pipe, thereby realizing the symbiotic aquaculture of shrimp, grass, fish, and snails.

[0046] Specifically, laying geomembrane can be done with black HDPE geomembrane; installing drainage pipes can be done with PVC drainage pipes; planting aquatic plants can be done with *Hydrilla verticillata*; releasing shrimp can be done with *Macrobrachium rosenbergii* larvae at a density of 30,000 shrimp per acre; releasing snails can be done with *Cynodon dactylon* at a density of 2 kg per acre; and releasing silver carp can be done with *Silver carp* at a density of 50 fish per acre.

[0047] In one possible implementation, when laying the geomembrane, ground nails and gaskets are used to fix the geomembrane to the pond embankment, pond wall, and pond bottom. The seams of the geomembrane are bonded with geomembrane-specific hot melt adhesive. When installing the drainage pipe, the drainage pipe is laid along the direction of the secondary shrimp channel in the center of the pond bottom. The front end of the drainage pipe is sealed with a plug. A valve is connected to the end of the drainage pipe to control drainage. When installing the segmented self-sinking nano-aeration pipe, the segmented self-sinking nano-aeration pipe is laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano-aeration pipe is connected to the main ventilation pipe, and then the main ventilation pipe is connected to a Roots blower.

[0048] Specifically, the ground nail can be a 20cm long iron nail; the gasket can be a 5cm diameter rubber gasket; the Roots blower can be a 1.5kW low-noise blower; and the joint adhesive can be hot melt adhesive applied evenly along the joint length.

[0049] In one possible implementation, after laying the geomembrane and installing the relevant equipment, the pond is disinfected, water is added to the pond to a preset depth to cultivate aquatic plants, and the water depth is gradually increased after the aquatic plants have grown steadily. Shrimp fry are first introduced into the pond, and after the shrimp fry have been raised for a period of time, snails are introduced, and after a period of further raising, silver carp are introduced. During the raising process, oxygen is continuously increased through the segmented self-sinking nano-aeration pipe, and sewage is regularly discharged and water is changed through the drainage pipe.

[0050] Specifically, disinfection provides a sterile environment for planting aquatic plants and introducing organisms, adding water to cultivate aquatic plants provides a habitat for shrimp, introducing organisms in sequence forms a symbiotic system, and oxygenation and sewage discharge equipment provide environmental protection for the aquaculture process.

[0051] The following detailed description, with reference to the accompanying drawings, illustrates a preferred embodiment of the symbiotic green aquaculture system for giant freshwater prawns based on localized membrane laying according to the present invention. The construction process of this embodiment is described in detail below. Figures 1 to 3 The structural diagram shown is presented.

[0052] Example 1: Constructing a Symbiotic Green Aquaculture System for Giant Freshwater Prawns

[0053] First, an 8m wide black geomembrane 1 is used to fully enclose the pond embankment and pond wall 2. During the laying process, it is ensured that the geomembrane 1 is tightly attached to the pond embankment and pond wall 2. Then, common garden nails and shims are used to evenly fix the geomembrane 1. The spacing of the nails is set reasonably to ensure that the fixation is firm. The joints between the geomembranes 1 are evenly applied with geomembrane-specific hot melt adhesive and then bonded to ensure that the joints are sealed and leak-free.

[0054] Next, a 2.5m wide black geomembrane 1 is used to lay the main shrimp passages 3 around the bottom of the pond. The laying method is the same as that of the geomembrane 1 on the pond bank and walls. It is also fixed by ground nails and shims. The seams are glued with hot melt adhesive to ensure that the geomembrane 1 in the main shrimp passage area is flat and wrinkle-free.

[0055] Then, a 2m wide black geomembrane was used to lay longitudinal secondary shrimp channels 4 and transverse secondary shrimp channels 5. Each secondary shrimp channel arranged in the same direction was spaced 1m to 2m apart. The distance between the secondary shrimp channels and the main shrimp channel 3 was set to 1.5m. After laying, the geomembrane 1 was fixed with ground nails and shims and the joints were glued with hot melt adhesive. Through this arrangement, the geomembrane 1 was arranged in a crisscross pattern to form a grid 6 of exposed pond bottom with a side length of 1.5m.

[0056] Subsequently, on the longitudinal secondary shrimp channel 4 or the transverse secondary shrimp channel 5 at the very center of the bottom of the pond, the outlet pipe 7 is laid along the direction of the geomembrane 1. The length of the outlet pipe 7 at the bottom of the pond is 1 / 2 of the width of the bottom of the pond. The front end of the outlet pipe 7 is sealed with a plug 7-1. The front 1 / 4 area of ​​the outlet pipe 7 is densely covered with small holes 7-2 with a diameter of 3mm. The longitudinal spacing of the small holes 7-2 is 9cm and the transverse spacing is 5cm. A valve 8 is installed at the end of the outlet pipe 7 to realize drainage control.

[0057] Along the same direction as the outlet pipe 7, a segmented self-sinking nano aeration pipe 9 is laid on the geomembrane 1 of the secondary shrimp channel. The segmented self-sinking nano aeration pipe 9 is securely connected to the main ventilation pipe 10. The end of the main ventilation pipe 10 away from the segmented self-sinking nano aeration pipe 9 is connected to the Roots blower to ensure that the aeration pipeline is tightly connected and leak-free.

[0058] After the pond is treated with conventional disinfection methods, aquatic plants 11 are planted in the exposed pond bottom squares 6 with a side length of 1.5m, which are enclosed by the geomembrane 1 in a crisscross pattern. The aquatic plant 11 is Hydrilla verticillata. After planting, water is added to the pond to an average depth of 10cm to 20cm to provide a suitable environment for the growth of aquatic plants 11.

[0059] As the aquatic plants gradually grow, water is gradually added to the pond, eventually adjusting the water depth to 80-100 cm. Then, giant freshwater prawn larvae are introduced into the pond. Thirty days after the larvae are introduced, Chinese river snails (Cipangopaludina cathayensis) are introduced at a density of 2 kg per acre. Forty days after the prawns are introduced, silver carp (Hypophthalmichthys molitrix) with a size of 16 cm are introduced at a density of 50 fish per acre.

[0060] Other aquaculture operations in this embodiment, including feed feeding, water quality monitoring, and daily inspections, are all carried out in accordance with conventional shrimp farming methods.

[0061] Example 2: Constructing a Symbiotic Green Aquaculture System for Red Claw Crayfish

[0062] First, a 6m wide black geomembrane 1 is used to fully enclose the pond embankment and pond walls 2. During the laying process, it is ensured that the geomembrane 1 is tightly attached to the pond embankment and pond walls 2 without any wrinkles or gaps. Then, common garden nails and shims are used to fix the geomembrane 1. The nails are evenly distributed and reasonably spaced to ensure a firm fixation. At the joints between the geomembrane 1, geomembrane-specific hot melt adhesive is evenly applied and then tightly bonded to ensure that the joints are sealed and leak-free.

[0063] Next, a 2m wide black geomembrane 1 is used to lay the main shrimp passages 3 around the bottom of the pond. When laying, the geomembrane 1 is kept flat and covers the main shrimp passage area 3. It is also fixed by ground nails and shims. The arrangement of the ground nails is the same as that of the pond embankment and pond wall. The joints are still glued with geomembrane-specific hot melt adhesive to ensure that the geomembrane 1 in the main shrimp passage area 3 is stable and reliable.

[0064] Then, a 1.5m wide black geomembrane was used to lay longitudinal secondary shrimp channels 4 and transverse secondary shrimp channels 5. Each secondary shrimp channel arranged in the same direction was spaced 2m apart, and the distance between the secondary shrimp channel and the main shrimp channel 3 was also set to 2m. During the laying process, the geomembrane was arranged neatly in a crisscross pattern. After the laying was completed, it was fixed with ground nails and shims, and the joints were glued with geomembrane-specific hot melt adhesive. Through this arrangement, the geomembrane 1 formed a grid 6 with a side length of 2m by crisscrossing.

[0065] Subsequently, on the longitudinal secondary shrimp channel 4 or the transverse secondary shrimp channel 5 at the very center of the bottom of the pond, the outlet pipe 7 is laid along the direction of the geomembrane 1. The length of the outlet pipe 7 at the bottom of the pond is 1 / 2 of the width of the bottom of the pond. When laying, ensure that the outlet pipe 7 is tightly attached to the geomembrane 1. The front end of the outlet pipe 7 is sealed with a plug 7-1. The front 1 / 4 area of ​​the outlet pipe 7 is densely covered with small holes 7-2 with a diameter of 4mm. The longitudinal spacing of the small holes 7-2 is 10cm and the transverse spacing is 6cm, and they are evenly distributed. A valve 8 is installed at the end of the outlet pipe 7 to control the opening and closing of the drainage.

[0066] Along the same direction as the outlet pipe 7, a segmented self-sinking nano aeration pipe 9 is laid on the geomembrane 1 of the secondary shrimp channel. The segmented self-sinking nano aeration pipe 9 is firmly connected to the main ventilation pipe 10, and the connection is sealed without leakage. The end of the main ventilation pipe 10 away from the segmented self-sinking nano aeration pipe 9 is connected to the Roots blower to ensure smooth airflow in the aeration pipeline.

[0067] After the pond is treated with conventional disinfection methods, aquatic plants 11 are planted in the exposed pond bottom squares 6 with a side length of 2m, which are enclosed by the geomembrane 1 in a crisscross pattern. The aquatic plants 11 are Hericium verticillata. They are planted evenly to ensure that the number of aquatic plants in each square is moderate. After planting, water is added to the pond to an average depth of 15cm to provide a suitable aquatic environment for the growth of aquatic plants 11.

[0068] As the aquatic plants gradually grow, water is gradually added to the pond, but not too quickly each time to avoid damaging the plant roots. The final water depth is adjusted to a suitable range of 80-100 meters. Afterward, redclaw crayfish larvae are introduced into the pond. Twenty days after the larvae are introduced, Chinese round snails (Cipangopaludina cathayensis) are evenly released at a density of 2 kg per acre.

[0069] After 30 days of raising redclaw crayfish, silver carp with a size of 12cm were introduced at a density of 100 crayfish per acre. The scientific name of the silver carp is Hypophthalmichthys molitrix.

[0070] Other aquaculture operations in this embodiment, including feed feeding, regular water quality monitoring, daily inspection and maintenance, and disease prevention and control, are all carried out in accordance with conventional shrimp farming methods.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] The above embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made based on the essence of the content of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A symbiotic freshwater shrimp green aquaculture system based on localized membrane laying, characterized in that, include: The pond comprises a geomembrane, drainage pipes, valves, segmented self-sinking nano-aeration pipes, a main ventilation pipe, and a blower. The geomembrane is laid on the pond walls and bottom, forming main shrimp channels, longitudinal secondary shrimp channels, and transverse secondary shrimp channels on the bottom. These channels enclose a grid of exposed pond bottom. The drainage pipe is located on the bottom of the pond, and the valve is connected to the end of the pipe to control drainage. The segmented self-sinking nano-aeration pipes are laid on the bottom, with one end of the main ventilation pipe connected to one of them and the other end connected to the blower. Aquatic plants are planted within the exposed pond bottom grids. Shrimp, silver carp, and snails are kept in the pond water, forming a symbiotic system with the aquatic plants.

2. The system according to claim 1, characterized in that, The geomembrane includes a fully enclosed geomembrane laid on the pond banks and pond walls, a main shrimp passage geomembrane laid around the pond bottom, a longitudinal secondary shrimp passage geomembrane laid on the pond bottom, and a transverse secondary shrimp passage geomembrane. The geomembrane is fixed to the pond banks, pond walls, and pond bottom by ground nails and gaskets, and the joints of the geomembrane are bonded with geomembrane-specific hot melt adhesive.

3. The system according to claim 1, characterized in that, The drainage pipe is laid along the geomembrane direction of the longitudinal or transverse secondary shrimp channel in the center of the pond bottom. The length of the drainage pipe at the pond bottom is half the width of the pond bottom. The front end of the drainage pipe is sealed with a plug. The front 1 / 4 of the drainage pipe is densely covered with drainage holes, which are evenly distributed on the pipe wall.

4. The system according to claim 1, characterized in that, The segmented self-sinking nano-aeration pipes are laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano-aeration pipes are connected to the main ventilation pipe. The end of the main ventilation pipe away from the segmented self-sinking nano-aeration pipes is connected to the air outlet of the blower. The segmented self-sinking nano-aeration pipes are distributed at multiple points on the bottom of the pond.

5. The system according to claim 2, characterized in that, The longitudinal and transverse secondary shrimp passage geomembranes are arranged in a crisscross pattern, with a preset distance maintained between the longitudinal and transverse secondary shrimp passage geomembranes and between the secondary shrimp passage geomembrane and the main shrimp passage geomembrane, together forming multiple evenly distributed exposed pond bottom squares. The aquatic plants are fixedly planted at the bottom of each of the exposed pond bottom squares.

6. The system according to claim 1, characterized in that, The shrimp, silver carp, and snails all live in the water of the pond. The snails feed on the shrimp's leftover food and feces, the silver carp filter microalgae from the water, the aquatic plants interact with the water of the pond, and the shrimp inhabit the main shrimp passage, secondary shrimp passage, and the area around the aquatic plants, forming a symbiotic aquaculture structure of shrimp, grass, fish, and snails.

7. The system according to claim 3, characterized in that, The drainage pipe is made of long PVC pipe. The plug is detachably connected to the front end of the drainage pipe. The valve is fixedly connected to the end of the drainage pipe. The pipe wall of the drainage pipe is tightly attached to the geomembrane at the bottom of the pool. The drainage holes have the same diameter and penetrate the pipe wall of the drainage pipe.

8. A symbiotic freshwater shrimp green aquaculture method based on localized film laying, characterized in that, include: A geomembrane is laid on the pond walls and bottom, forming a main shrimp channel, longitudinal secondary shrimp channels, transverse secondary shrimp channels, and an enclosed grid of exposed pond bottom. Drainage pipes and segmented self-sinking nano-aeration pipes are installed on the pond bottom. Aquatic plants are planted in the exposed pond bottom grids. Shrimp, silver carp, and snails are released into the pond. Oxygen is increased through the segmented self-sinking nano-aeration pipes, and water quality is regulated through the drainage pipes, achieving a symbiotic aquaculture of shrimp, grass, fish, and snails.

9. The method according to claim 8, characterized in that, When laying the geomembrane, ground nails and washers are used to fix the geomembrane to the pond embankment, pond wall, and pond bottom. The seams of the geomembrane are bonded with geomembrane-specific hot melt adhesive. When installing the drainage pipe, the drainage pipe is laid along the direction of the secondary shrimp channel in the center of the pond bottom. The front end of the drainage pipe is sealed with a plug. A valve is connected to the end of the drainage pipe to control drainage. When installing the segmented self-sinking nano aeration pipe, the segmented self-sinking nano aeration pipe is laid on the geomembrane of the secondary shrimp channel along the direction of the drainage pipe. The segmented self-sinking nano aeration pipe is then connected to the main ventilation pipe, and the main ventilation pipe is then connected to the Roots blower.

10. The method according to claim 8, characterized in that, After laying the geomembrane and installing the relevant equipment, the pond is disinfected, and water is added to the pond to the preset depth to cultivate aquatic plants. After the aquatic plants have grown steadily, the pond depth is gradually increased. Shrimp fry are first introduced into the pond, and after the shrimp fry have been raised for a period of time, snails are introduced. After a period of further raising, silver carp are introduced. During the breeding process, oxygen is continuously increased through the segmented self-sinking nano-aeration pipe, and sewage is regularly discharged and water is changed through the drainage pipe.

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