59 results about "Polyculture" patented technology

The invention discloses a multi-objective optimization decision control method for shrimp and silkworm polyculture environment parameters, and relates to the technical field of polyculture control. The method comprises the following steps: deploying a water quality sensor network, and combining prawn and nereis growth monitoring equipment; extracting criticality of environmental parameters and biological growth indexes by using historical breeding data and experimental data; constructing a dynamic coupling model, and establishing a dynamic model of the polyculture system based on a differential equation; developing a hybrid optimization algorithm to balance the competition and symbiotic relationship between the prawns and the nereis; and generating a control instruction set based on an optimization result, and adjusting the control equipment through a fuzzy PID controller. According to the invention, intelligent regulation and control of shrimp and silkworm polyculture environment parameters are realized, and economic benefits of shrimp and silkworm polyculture are improved.

The invention discloses a preparation method and application of efficient polyculture denitrification synergistic phosphorus removal filler, and belongs to the field of functional material development and sewage treatment. The method specifically comprises the following steps: step 1, uniformly mixing iron ore powder, sulfur powder and polyester high-molecular compound powder, and heating and melting; and 2, carrying out molding treatment on the molten substance, and cooling and solidifying to obtain the efficient polyculture denitrification synergistic phosphorus removal filler. According to the polyculture denitrification synergistic phosphorus removal filler disclosed by the invention, a polyester high-molecular compound is used as a supplementary electron donor of a sulfur-iron ore autotrophic denitrification synergistic phosphorus removal system, so that the nitrogen removal efficiency of denitrification is improved; the compound also can be used as an electron donor to participate in a ferrous sulfide reduction reaction, so that the discharge of sulfate in effluent is reduced, and enhanced phosphorus is removed in a form of Fe3 (PO4) 2 precipitate; meanwhile, heterotrophic denitrification generates alkalinity to make up the consumption of alkalinity in the autotrophic denitrification process, and the stability of pH in the system is maintained, so that the removal efficiency of nitrogen and phosphorus is enhanced, and secondary pollution is reduced.

The invention discloses a method for evaluating the effect of treating tail water of a land-based culture system in a paddy field, and relates to the technical field of agro-ecology, and the method is characterized by comprising the following steps: setting a land-based culture system test model in a rice-fish combined cropping mode; repeatedly sampling the paddy field water body, the breeding tail water and the land-based breeding system inlet water according to the preset loci; detecting water quality twice a week; applying fertilizer to the paddy field in the third circumference and the fourth circumference respectively; respectively recording data of a tillering stage, a jointing booting stage, a heading stage and a flowering stage according to the growth stage of the rice; and carrying out statistical analysis on the detection result, and comparing water quality parameter differences among different sampling groups so as to evaluate the treatment effect of the paddy field on the breeding tail water. Through scientific experimental design and comprehensive water quality detection, the treatment effect of the paddy field on the breeding tail water is accurately evaluated, technical support is provided for sustainable development of a rice-fish combined cropping system, and the method has important theoretical and practical significance for reducing agricultural non-point source pollution and protecting the ecological environment.

The invention discloses a multi-species mutualism-based mussel and fish polyculture ecological regulation and control method, and relates to the technical field of ecological culture, and the method comprises the following steps: S1, facility preparation; s2, putting species; s3, breeding regulation and control; s4, feeding control; and S5, performing final-period management. Through strict screening of the culture pond, thorough disinfection and scientific cultivation of water quality, an excellent starting end is created for culture, the disease risk is reduced, beneficial microbial communities enhance the self-cleaning capacity of a water body, the feeding quantity and proportion are accurately calculated, the ecological capacity is fully utilized, the fingerlings are reasonably matched, stable operation of an ecological system is guaranteed, and the ecological system is more intelligent and reliable through real-time monitoring and intelligent prediction. The feeding amount and the water changing frequency are adjusted in time, the water quality is effectively maintained, the breeding loss caused by water quality deterioration is reduced, grass carp feeding is adjusted according to the aquatic plant coverage rate, reasonable growth of aquatic plants is maintained, ecological balance is promoted, the win-win situation of ecological benefits and economic benefits is achieved, and an effective mode is provided for sustainable aquaculture.

The invention relates to the technical field of intelligent cultivation, and provides a fish polyculture judgment method based on a lightweight multi-task image recognition network and a knowledge graph, and the method comprises the steps: obtaining image data and sensor data, and carrying out the preprocessing of the image data, and obtaining a to-be-recognized image; inputting the to-be-recognized image into a pre-trained image recognition model to generate visual perception data; performing weighted fusion on the visual perception data and the sensor data to form a comprehensive feature vector; and inputting the comprehensive feature vector into a pre-trained knowledge graph matching model, calculating a matching degree between the comprehensive feature vector and a polyculture rule in a knowledge graph according to a dynamic rule matching mechanism, and determining whether polyculture can be performed according to the matching degree. The problem that the survival rate of existing fish polyculture is low is solved.

The invention discloses a polyculture method of macroalgae and siganus siganus. By changing a single culture mode, space resources of the whole water body are utilized to the maximum extent, and the water body utilization rate is increased. The macroalgae are bred in the middle-upper water area of the pond through the net cage, sufficient sunlight in the middle-upper water area is fully utilized for growth of the macroalgae, the space under the net cage serves as a place for fish to hide and inhabit, a comfortable environment is provided for fish breeding, fish stress is reduced, and diseases are reduced. And the macroalgae and the cultured fishes are cultured in an isolated manner through the netting, so that the amount of algae ingestion of the fishes can be controlled, healthy growth of the macroalgae is ensured, and collection of the macroalgae is facilitated. The differentiation of the ecological niche enables the fishes and the algae to be mutually beneficial and coexist in the same water body.

The invention discloses a cage device for polyculture of snails in a crab pond, which comprises a culture cage body, snail culture cylinders, foldable insertion pieces, insertion piece adjusters and an electric screening assembly, the culture cage body is put into the crab pond, and the snail culture cylinders are mounted in the culture cage body; the foldable inserting piece is arranged on the outer wall of the breeding cage body, the upper end of the foldable inserting piece is connected with the inserting piece adjuster, the inserting piece adjuster is installed at the top of the breeding cage body, the electric screening assembly is arranged at the top of the breeding cage body, and the breeding cage body comprises a cage body, a cage cover, a handle, a floating ball fixing ring and a fixing buckle. The cage body comprises an outer frame and a movable bottom net movably arranged at the bottom of the outer frame, the outer frame is of a square structure defined by a plurality of PVC pipes, and the cage cover is arranged on the top of the cage body. By means of the crab pond polyculture cage device, ecological polyculture of crabs and snails can be achieved, the culture benefits of farmers are greatly improved, and the input cost of feed is reduced.

The invention discloses a large-size seawater fry factory-like grading cultivation system, and relates to the technical field of aquaculture. The system comprises a first-stage culture pond, a second-stage culture pond and a third-stage culture pond. The first-stage culture pond is connected with the second-stage culture pond through a conveying pipeline, and the second-stage culture pond is arranged in the third-stage pond. The first-stage tank is provided with an independent first circulating water filtering device and a monitoring unit, and the second-stage tank and the third-stage tank share a second circulating water filtering and monitoring unit. Each monitoring unit integrates growth detection, environment regulation and control and disease early warning functions. The first-stage pond is used for cultivating newly hatched larvae, and the larvae are automatically transferred to the second-stage pond through a conveying pipeline when developing to a juvenile fish stage; the second-stage pond and the third-stage pond jointly form a polyculture environment, and when the juvenile fish reaches the target specification, a cage door is opened, and the juvenile fish is transferred into the third-stage pond. According to the system, through grading environment control and an automatic transfer mechanism, efficient breeding of fish fries from larva fish to large-scale fish fries is achieved, and the problems of uneven growth, low sorting efficiency and the like in traditional fish fry breeding are solved.

The utility model relates to the technical field of shellfish culture, in particular to a polyculture system suitable for mudflat shellfishes, which comprises a culture pond and a shellfish culture cage arranged in the culture pond. A culture bottom bed is arranged at the bottom in the culture pond, a water temperature sensor and a water quality sensor are installed on the right wall in the culture pond, an adjusting rod is fixed to the upper end of the shellfish culture cage, a lifting plate is fixed to the upper end of the adjusting rod, a supporting plate is fixed to the right side of the culture pond, and an electric cylinder is connected between the supporting plate and the lifting plate; cooperative growth and resource sharing of shellfishes are facilitated, the culture height in the culture pond is flexibly adjusted according to the growth state of the shellfishes, the normal growth state of the shellfishes is guaranteed, the polyculture system has the advantages of being simple in structure, flexible in operation, high in culture benefit and the like, the growth speed of the shellfishes can be increased, and the culture cost is reduced. And adverse effects on the surrounding environment can be reduced.

The invention relates to the technical field of water treatment, in particular to a preparation method and application of a phycomycete compound. The phycomycete compound is applied to nitrogen and phosphorus removal and surface water treatment. Wherein the chlorella vulgaris and the quadruplex obliquus have strong reproductive capacity and strong adaptive capacity to environment, and absorb various elements such as carbon, nitrogen and phosphorus from water through autotrophy, heterotrophy and polyculture growth; activated sludge containing bacteroides and pseudomonas can degrade complex organic compounds, has metabolic capabilities such as heterotrophic denitrification and the like, and is beneficial to forming a co-culture system with microalgae in the initial culture stage; and nitrifying and denitrifying bacteria are compounded to consolidate the nitrogen removal environment order, so that the water body is effectively purified and the water color is good. The phycomycete compound obtained by the invention not only can be suitable for high-nitrogen simulation wastewater of a laboratory, but also can be applied to in-situ treatment of an actual river channel, has remarkable environmental benefits and has a wide application prospect.

The utility model belongs to the technical field of deep sea culture work ships, and relates to a gravity type net cage and culture cabin combined culture system, which comprises a culture cabin, a gravity type net cage and a traction device used for fixing the gravity type net cage in the culture cabin, and a space is reserved between the periphery of the gravity type net cage and the inner wall of the culture cabin. The traction device comprises a transverse force traction assembly and a longitudinal force traction assembly, the transverse force traction assembly is arranged between the walking board and the gravity type net cage on the two sides of the ship side of the breeding cabin, and the longitudinal force traction assembly is arranged between the walking board and the gravity type net cage on the two sides of the bow and the stern of the breeding cabin. Advantages of the gravity type net cage and the breeding cabin are complementary, fries with small specifications can effectively resist invasion of alien species, feeding efficiency is improved, and development of a three-dimensional breeding mode or a multi-species polyculture mode can be further achieved.

The invention discloses a high-yield carp and crayfish polyculture system in a cold region pond, relates to the high-yield carp and crayfish polyculture system in the cold region pond, and belongs to the field of biological behavior ecology and the technical field of aquaculture. The invention aims to break through the ecological constraint of the special habitat of the cold region on the crayfish and solve the problem of the economic benefit bottleneck of the main culture pond for the carps in the cold region. The system comprises a carp feeding area, an annular submerged plant zone and a main crayfish breeding area, and the area ratio of the carp feeding area to the annular submerged plant zone to the main crayfish breeding area is (1-1.5): (0.5-1.0): (10.5-9.5). According to the method, the economic benefit bottleneck of the carp main culture pond is solved, the survival trapping of the crayfish is broken through, and the ecological constraint brought by the special habitat of the cold region is tamed.

The present invention relates to a multi-nutrient mixed aquaculture device for seawater involving shrimps, shellfish and sea urchins and a method for using the same. The mixed aquaculture device comprises an aquaculture tank and a net cage. Floating plates are fixedly connected to the net cages. Symmetrically arranged adsorption plates are slidably connected inside the aquaculture tank. Sea urchins are cultured inside the net cages of the mixed aquaculture device, and shrimps and mussels are cultured inside the aquaculture tank. By using the mixed aquaculture device to mix and culture shrimps, shellfish and sea urchins, on the one hand, it is convenient to deeply clean the inner wall of the aquaculture tank, which can reduce the time required for cleaning the inner wall of the aquaculture tank and improve the convenience of cleaning the aquaculture tank. On the other hand, the total survival rate of the mixed cultured species is 100%, and the total net yield per unit water body is greater than or equal to 6.4 g / L. This not only increases the output per unit area but also reduces the environmental risks that may be brought about by single aquaculture.

The lamb polyculture feeding device comprises a frame structure and a feeder, a feeding gap is formed in the frame structure, in the using process, the lamb polyculture feeding device can be arranged in a polyculture area under the state that large sheep and lambs are in polyculture, then the feeder is filled with concentrated feed, and under the condition, the lambs can be fed into the feeding gap through the feeding gap, and the lambs can be fed into the feeding gap. The lambs are small in size and can penetrate through the feeding space to use the concentrate in the feeder, and the big sheep is large in size and cannot penetrate through the feeding gap, so that the big sheep can be prevented from snatching the concentrate of the lambs, the big sheep and the lambs do not need to be separated, and polyculture is more convenient.

The invention relates to a selenium-rich fish, turtle and soft-shelled turtle ecological polyculture method based on livestock and poultry manure, earthworms and selenium-rich azolla filliculoidas, and belongs to the technical field of aquaculture. Through a three-level selenium enrichment technology (wormcast selenium 14-15 mg / kg, rumex hanus 1.4-1.5 mg / kg and feed 60% selenium-rich rumex hanus) and a spatial layered polyculture mode (upper-layer crucian, middle-layer turtles and bottom-layer turtles), the yield per mu is larger than 1335 kg, the selenium content of crucian is 0.12 mg / kg, the selenium content of turtles is 0.35 mg / kg, the selenium content of turtles is 0.33 mg / kg, the yield is increased by 12% compared with that of traditional single culture, and the feed cost is reduced to 1.1 yuan / kg. The water quality (ammonia nitrogen is less than 0.3 mg / L) is regulated and controlled by adopting a complex microbial inoculant, and facilities such as a back sunning platform and an inhabiting cave are matched, so that the survival rate reaches 85-90%.

Disclosed herein are novel microbial polycultures of two or more cell strains, capable of producinges, flavonoids, and anthocyanidin-3-O-glucosides, and methods of use thereof. Also disclosed is a microbial cell capable of producing phenylpropanoic acids, and methods of use thereof.

The utility model relates to a male and female parent shrimp polyculture pond which comprises a shrimp pond, an oxygen injection mechanism is connected to the middle of the interior of the shrimp pond, two bins are connected to the interior of the shrimp pond, and feeding channels are connected to the bottoms of the bins; a rotating shaft is rotationally connected between the two opposite side walls in the feeding channel, a plurality of feeding rollers are connected to the rotating shaft, and the peripheral sides of the feeding rollers and the inner side wall of the feeding channel are arranged in a dynamic sealing mode. The utility model relates to the technical field of male and female shrimp polyculture ponds. When the male and female parent shrimp polyculture pond is used, an oxygen injection mechanism can be used for pushing water flow to flow during oxygen injection, then a side plate is pushed to enable a rotating shaft to rotate, a feeding groove is driven to rotate, feed falling into the feeding groove can enter the shrimp pond along with rotation of the feeding groove, the step of feeding operation is omitted, and the operation efficiency is improved. And the effects of reducing the steps required to be operated during feeding and reducing the feeding cost are achieved.

The invention discloses a culture method for polyculture of holothuria scabra in a pond in a segmented and coarse manner, and belongs to the technical field of marine aquaculture. According to the method, Babylonia areolata and Sipunculus nudus are selected to be subjected to polyculture with holothuria scabra, different polyculture technical key points are designed according to biological characteristics and growth stages of different varieties, the pond culture space is fully utilized, ecological niche complementation is achieved, and a multi-variety mutualism ecological polyculture mode is constructed. According to the sectional type pond culture method, small-size stichopus japonicus seedlings are effectively protected, the culture space of the pond is fully utilized, the characteristics of large-size stichopus japonicus seedlings' scavengers' can be utilized, the morbidity of sipunculus nudus and babylonia areolata is reduced, a multi-variety mutualism ecological environment is constructed, yield and income are increased, and the economic benefit is increased. The development of the holothuria scabra breeding industry can be promoted, and positive significance is achieved for rejuvenation of holothuria scabra germplasm resources

This invention discloses a multi-level ecological polyculture method for *Bombyx mori*, comprising the following steps: S1, pond treatment; S2, aquatic plant planting; S3, snail seedling selection and stocking; S4, *Cyprinus cuspidatus* selection and stocking; S5, feeding; S6, water quality control; S7, harvesting. This invention, by polyculturing *Bombyx mori* and *Cyprinus cuspidatus*, can fully utilize feed and water resources, providing an excellent aquatic environment for *Cyprinus cuspidatus* while significantly increasing the yield and survival rate of *Bombyx mori* per unit water volume, thus bringing good economic value.

This invention relates to the field of aquaculture engineering technology, and discloses a gravity-based three-dimensional polyculture system for fish, shellfish, and algae based on intelligent monitoring, and its control method. The system includes a polyculture system net, which is used to optimize ecological efficiency when fish, shellfish, and algae are polycultured. The net contains polyculture support components. In this invention, the polyculture system net enables three-dimensional, stratified polyculture of fish, shellfish, and algae, establishing a complete trophic cascade relationship. Fish uneaten feed and excrement are filtered and utilized by mid-layer shellfish, shellfish metabolites promote the growth of bottom-layer algae, and algae photosynthesis oxygenates the system and absorbs eutrophic salts, forming a closed-loop, highly efficient ecological cycle. Combined with dissolved oxygen sensors, flow meters, and multi-dimensional water quality sensors for collaborative monitoring, the culture density at each layer can be precisely controlled, increasing the system's material conversion efficiency by more than 30% and reducing feed input by 25% compared to traditional monoculture models.

The present invention discloses a method for co-culturing Undaria pinnatifida and juvenile Laminaria japonica on a culture rope for seedlings, belonging to the technical field of large seaweed cultivation. In the present invention, Laminaria japonica seedlings are first collected onto the culture rope for Undaria pinnatifida seedlings, and then Undaria pinnatifida seedlings are clipped onto the culture rope. On the same culture rope and in the same water body, Undaria pinnatifida and Laminaria japonica grow simultaneously. Undaria pinnatifida is harvested in the early stage, and juvenile Laminaria japonica is harvested in the later stage. It is realized that both Undaria pinnatifida and juvenile Laminaria japonica are harvested on the same water body and the same seedling rope. This not only changes the practice in the prior art of collecting Laminaria japonica seedlings and Undaria pinnatifida seedlings onto different culture ropes, but also improves the prior art methods of polyculture and intercropping of Laminaria japonica and Undaria pinnatifida in the same water area. This research improves the cultivation efficiency and benefits of Laminaria japonica and Undaria pinnatifida per unit water body, increases the utilization rate of sea areas, makes contributions to the cultivation of Undaria pinnatifida and Laminaria japonica, and has practical application value for marine fishery production.

The invention discloses an illumination temperature control system for a crayfish fry breeding shed and a breeding method. The system comprises an illumination control mechanism arranged at the top of the crayfish breeding shed. The crayfish breeding shed is composed of breeding shed enclosing walls built on the ground and connected end to end and a breeding shed roof fixed to the tops of the breeding shed enclosing walls, and a plurality of crayfish breeding ponds with upward openings are built on the ground in the crayfish breeding shed; the breeding shed roof is composed of a plurality of shed roof supporting arched beams which are fixed to the tops of the breeding shed enclosing walls and arranged in parallel, and the tops of the multiple shed roof supporting arched beams are jointly and fixedly connected with a shed roof supporting cross beam. The illumination control mechanism comprises a plurality of pieces of electrochromic glass connected between every two adjacent shed roof supporting arched beams. The system has the wide-range dimming capability, accurately meets the illumination requirements of the crayfish fry in a plurality of breeding stages, has a zoning control function, can independently adjust the illumination intensity in a zoning manner, and adapts to fry polyculture scenes in a plurality of stages.

The invention relates to the technical field of aquaculture, in particular to a polyculture method for humpback perches and plectropomus leopardus. According to the technical scheme, the method comprises the steps of water quality regulation and control to ensure that the water quality is always in a suitable range, pond area division: dividing a culture pond into different areas, and density control: determining reasonable culture density according to the volume of the culture pond and the growth requirement of each kind of fish, feed feeding: the feed feeding amount and time are automatically adjusted according to the body weight, the feeding rule, the feeding amount and the water quality condition of each type of fish to avoid feed waste as much as possible, and water quality fluctuation prediction and adjustment: possible water quality fluctuation is predicted, and corresponding adjustment is made to keep a stable culture environment. Fish behavior collaborative optimization: improving feed utilization efficiency and ensuring optimal allocation of resources in the culture pond. According to the polyculture method, the feed utilization rate is increased, healthy growth of the two kinds of fishes is ensured, efficient utilization of resources is promoted, and the culture benefit of polyculture of the humpback perches and the plectropomus leopardus can be remarkably improved.

The present invention discloses a fish three-dimensional ecological polyculture method, which relates to the technical field of fishery ecological three-dimensional culture, including: step S10, construction and disinfection of a culture area; step S20, mapping, and determining the culture equipment according to the mapping results; step S30, constructing a three-dimensional culture space based on the mapping data, floating windows and blocking nets; step S40, according to the pre-planned, fish, shrimp and crab seedlings, and corresponding feeds are put into the corresponding area, and the total amount of seedlings in the culture area is estimated according to the mark-recapture method, and the amount of fish seedlings is supplemented. The culture area is sterilized twice, and the combination of bleaching powder and quicklime is used to sterilize more thoroughly. In the subsequent three-dimensional culture process, no water poisoning or pollution will occur, and the water body will be cleaner; the water body in the culture area is circulated and replaced to maintain the freshness of the water body, which can significantly reduce the input of drugs, reduce the cost of culture, improve the quality of aquatic products, and enhance the market competitiveness of aquatic products.

The invention relates to the technical field of ecological culture, and discloses an application of a platform field culture mode in a grass carp polyculture pond, the platform field culture mode comprises a culture pond body, the left end of the culture pond body is provided with a culture unit, and the right side of a culture pond spare tire is provided with a purification unit; and inch water pumps are mounted at the corners of the breeding units. The platform field culture mode is applied to the grass carp polyculture pond, materials are convenient to take, the material cost is low, the whole process is environmentally friendly and free of pollution, ecological purification and cyclic utilization of tail water of the culture pond are achieved, nitrogen and phosphorus in the water body are efficiently absorbed through aquatic plants such as sudangrass, barnyard grass and water spinach, and the water quality is improved. The aquatic plants can be regularly cut to serve as supplementary baits of herbivorous fishes, an ecological cycle of planting and breeding integration is formed, the low-carbon and ecological breeding requirements are met, the nitrogen and phosphorus utilization rate is obviously increased compared with a traditional breeding pond, the problems of water eutrophication, difficult tail water treatment and the like in traditional breeding are effectively solved, and the economic benefit is improved. The culture benefit and the environmental benefit are both considered.

The invention relates to the technical field of aquaculture, and provides a method for domesticating cheilocheilus undulatus, which comprises the following steps: S1, fishing in the field and transporting to a destination; s2, treatment before temporary rearing: before temporary rearing, the cheilocheilus undulatus is added into water for temperature and salinity balance, and sterilization and insecticidal treatment is carried out on the cheilocheilus undulatus; s3, temporary rearing: carrying out temporary rearing on the libiopterus undulatus subjected to sterilization and insect killing treatment, stopping feeding during the temporary rearing period, and splashing vitamin C every day; s4, domestication: performing live bait opening domestication on the temporarily cultured cheilocheilus undulatus, then performing polyculture on the cheilocheilus undulatus successfully subjected to live bait opening domestication and grouper or humping fish, and performing bait conversion domestication by taking iced fresh fishes and shrimps as baits, and S5, daily culture: performing daily culture on the cheilocheilus undulatus successfully subjected to bait conversion. According to the method, the wild libiopterus undulatus can be successfully domesticated, and the domestication survival rate is high.

The utility model relates to the technical field of culture pond polyculture, and discloses a bullfrog culture device which comprises a frame, a plurality of supporting columns, a net cage assembly, a connecting piece and a floating plate assembly, the supporting columns are detachably connected to the edges of the frame respectively, the net cage assembly is hung in the frame, a culture area is formed in the frame, and the floating plate assembly is arranged in the frame. The floating plate assembly is movably connected to the supporting columns through connecting pieces, the floating plate assembly is located in the breeding area and forms a shallow water area with the water surface of the pond, and a deep water area is arranged between the edge of the floating plate assembly and the net cage assembly. It can be guaranteed that the frame is horizontally fixed in an external pond, the stability of the frame and the net cage assembly is guaranteed, the floating plate assembly is movably connected to the multiple supporting columns through the multiple connecting pieces respectively, the floating plate assembly is convenient to replace, and the service life of the floating plate assembly is prolonged. The floating plate assembly can build a shallow water area and a deep water area in the breeding area, the living environment of bullfrogs can be better met, the utility model further discloses a polyculture system, and polyculture of fishes, shrimps and bullfrogs is achieved.

The utility model discloses a combined cocooning tool for silkworm breeding and cocooning, relates to the technical field of silkworm breeding tools, aims to solve the problem of co-breeding of grown silkworms and young silkworms, can flexibly adjust increase and decrease of silkworm breeding areas, has a structure capable of being assembled and disassembled, facilitates cleaning of the cocooning tool and collection of silkworm excrement, and is convenient to use. According to the technical scheme, the combined cocooning frame for silkworm breeding and cocooning is characterized by comprising paper cocooning frames, side connecting plates and breeding drawers, each paper cocooning frame comprises a cocooning frame net, a back plate and inserting blocks, each side connecting plate comprises a plate body, inserting holes, rod grooves, connecting rods, sliding rails, inserting buckles and buckling rings, and each breeding drawer comprises a drawer, sliding blocks, rolling wheels, net containing grooves, leaf laying nets and sand leaking areas. The back plate adopted by the cocooning frame avoids the polyculture of the large silkworms and the small silkworms, and the cocooning frame has the advantages of being small in occupied area, convenient to assemble and the like due to the detachable structure.

The invention belongs to the field of multi-nutrition-level polyculture ponds, and particularly relates to a trachinotus ovatus-penaeus monodon-blue crab multi-nutrition-level polyculture pond which comprises a pond body, a lower-layer separation net is slidably connected to the lower middle portion of the inner wall of the pond body, and an upper-layer separation net is slidably connected to the upper middle portion of the inner wall of the pond body. The lower end of the upper-layer separation net is fixedly connected with a plurality of evenly-distributed supporting legs, and the upper end of the upper-layer separation net is fixedly connected with a supporting rod. The upper-layer separation net, the lower-layer separation net, the dismounting and mounting mechanism and other structures are additionally arranged in the pond body, in the using process, the pond body can be divided into three layers for breeding through the upper-layer separation net and the lower-layer separation net, independent species can be separated, mutual predation among bred objects can be effectively avoided, and the breeding efficiency is improved. In addition, in the breeding process, the bottom of the pond body can be oxygenated through an air conveying pipe, a rotary oxygenation frame and other structures at the bottom, and oxygenation of the water body in the pond body can be more uniform.