633 results about "Freshwater shrimp" patented technology

The invention discloses a freshwater shrimp culture tail water treatment system for treatment of the tail water of a culture pond. The freshwater shrimp culture tail water treatment system comprises:a pair of ecological ditches for preliminary purification of culture tail water, a sedimentation tank for sedimentation to remove granular solids in the culture tail water subjected to preliminary purification in the ecological ditches, a filtration dam for filtering solid particles in the culture tail water subjected to sedimentation treatment in the sedimentation tank, an aeration tank for aeration treatment of the culture tail water subjected to filtration treatment by the filtration dam, a biological purification tank utilizing fungi and animals to remove harmful substances, algae and thelike in the culture tail water subjected to aeration treatment in the aeration tank, and a constructed wetland for effective degradation of pollutants and harmful substances in the culture tail watersubjected to purification in the biological purification tank. The freshwater shrimp culture tail water treatment system provided by the invention can effectively remove solid particle impurities in culture tail water, lower the dissolved nitrogen and phosphorus content, and degrade pollutants and harmful substances. The treated culture tail water can reach the culture tail water discharge standard, and can finally be discharged into external rivers or recycle to culture ponds.

Provided is a recycle mixing type rice field culture method. According to the method, a rice field and fresh water resources are utilized for culturing. The method comprises the following steps of arrangement of the rice field, installation and adjustment of facilities, disinfection of the clean field and water fertilizing, rice planting, loach and Chinese soft shell turtle stocking, edible frog throwing, loach and edible fog harvesting, rice harvesting, water entering to flood the field, freshwater shrimp autumn seedling stocking, freshwater shrimp multiple fishing and coming into the market of freshwater shrimps, freshwater shrimp and Chinese soft shell turtle capturing, and ploughing and field drying, wherein the arrangement of the rice field comprises the excavation of culturing ditches, and trimming of field ridges. By the adoption of the method, rice-fish culture and freshwater shrimp autumn seedling and Chinese soft shell turtle mixed culture are organically and cyclically combined, the problems that an empty rice field in winter is not utilized, a water-phase food chain is simple, the mutually beneficial level of rice and fish is low and the bird prevention and the pest removal are low are solved thoroughly, the recycle and safe and efficient output of the rice field are ensured, the significant increasing of the benefits of rice field culture is achieved, and the method has the advantages that the culture process is easy to operate, the culture cost is low and the culture safety is high.

The invention relates to the field of aquaculture, in particular to a comprehensive and ecological river crab pond culturing method. The method solves the problems that in an existing river crab and Chinese high fin banded shark mixed culturing method, antibiotics are usually used for carrying out prevention and treatment of diseases so as to cause reduction of nutritional value of river crabs, and the mixed culturing method brings lower economic benefits. The method comprises the following steps of step 1 of carrying out preparation of river crab pond conditions, step 2 of carrying out river crab pond preparation, step 3 of carrying out domestication of Chinese high fin banded shark, step 4 of stocking river crab larvae, fingerlings of Chinese high fin banded shark, fingerlings of mandarin fish and freshwater shrimps, and step 5 of uniformly putting fresh and clean margarya into a whole river crab pond according to the use quantity of 150kg to 200kg per mu before the Tomb-Sweeping Day and monthly putting temporarily cultured fresh margarya into the river crab pond according to the use quantity of 60kg per mu during May to August. The comprehensive and ecological river crab pond culturing method is used for culturing the river crabs.

The invention discloses an environmentally-friendly pond culture method for freshwater shrimps. The method comprises the following steps of: (1) selection of a pond; (2) pond reformation, (3) stocking of shrimp seedlings, (4) fodder and feeding, (5) water quality control and daily management and (6) catch of adult shrimps. Compared with the prior art, the method has the advantages that: popularization and application of the environmentally-friendly pond culture method for the freshwater shrimps successfully researched by the invention can gain better economic benefit in freshwater shrimp culture, more important, the water quality of the pond of the culture mode is kept well all the time, nearly no culture wastewater is drained and the ecological benefit is extremely obvious. Under the conditions of frequent disease attack of the current other shrimp varieties and higher culture risk, the popularization of the environmentally-friendly culture mode for the freshwater shrimps is a good path for becoming rich for fishermen.

The invention discloses a method for ecologically cultivating freshwater shrimps in a paddy. The method includes the following steps that the paddy is fertilized and then raked, a communicated cultivating ditch is excavated in the raked paddy, a field ridge is built around the cultivating ditch with excavated soil, the height of the field ridge ranges from 45 cm to 70 cm, and the width of the field ridge ranges from 60 cm to 90 cm; the cultivating ditch is provided with a water inlet and a drainage opening, the water inlet and the drainage opening are respectively provided with a device preventing the freshwater shrimps from escaping, a pond occupying 5%-8% of the area of the whole paddy is excavated on the water inlet, and the depth of the pond ranges from 80 cm to 110 cm; the paddy is sterilized through calcium oxide; seedlings of a rice variety are inserted into the sterilized paddy, wherein the stalks of the seedlings are thick and strong, the seedlings are resistant to lodging, diseases and fertility and grow in deep water, and the yield is high; the freshwater shrimps are fed after the seedlings turn green; bait is thrown during cultivating according to the freshwater shrimps in different growth stages, and meanwhile water keeps clean. The freshwater shrimps cultivated in the method are natural and free of pollution and are pure green food.

The invention discloses a method for ecologically culturing high-quality red testis river crabs, which fully utilizes natural conditions and resources of ponds, natural waters, rivers, reservoirs, lakes and wetlands, starts from biological, ecological and environmental mechanisms, follows the characteristics of respective econiches occupied by various organisms in biology, is based on biological characteristics of river crabs such as life habit, feeding habit, growth and development and the like, reasonably applies ecological balance breeding technology and nutrient balance technology, builds the best ecological environment of the culture of the river crabs, and meets the nutritional need of the growth and development of the river crabs to raise the high-quality 'red testis' river crabs. The ecological culture method comprises the following steps of: culture pond pretreatment, aquatic plant cultivation, shellfish transplantation, freshwater shrimp stocking, crab seedling stocking, siniperca chuatsi delivery, water quality control, bait feeding, and disease control. The method for culturing the river crabs can produce the high-quality and high-grade 'red testis' river crabs, can greatly improve the economic benefit of crab farmers, and can greatly improve the sustainable development of crab culture industry and the ecological benefit, the economic benefit and the social benefit of crab culture.

The invention relates to a large-scale method for raising seedlings of freshwater shrimps, which mainly comprises the following steps: the mixture ratio of female shrimps to male shrimps is between 3 and 5 to 1, and the shrimps come from different places, are more than 4.5 centimeters, have mature gonad, are able-bodied and scot-free, and have sensitive reaction to external stimulus; or shrimps with eggs and more than 5 centimeters are directly purchased in the mating period, taken as parent strains and placed into a seedling pool; high-quality full-rate mixed feed is thrown and fed from the next day; when zoeas occur in the pool, soybean milk is splashed; when shrimp larvaes begin to be abnormal, powdery mixed feed is fed when the soybean milk is splashed simultaneously; and when the proportion of abnormal seedlings is improved, the proportion of the powdery mixed feed is gradually increased and the powdery mixed feed can be completely thrown and fed after 10 days. Moreover, the transparency of a water body is controlled to between 20 and 30 centimeters; the pH value is between 7.5 and 8.5; and the dissolved oxygen is more than 5 milligrams per liter. The method is a scientific, reasonable, low-investment, high-efficiency and large-scale method for raising the seedlings of the freshwater shrimps, can effectively prevent varieties from degeneration, and is favorable for promoting good freshwater shrimps and improving the economic benefit of cultivation.

The invention relates to the field of composite fertilizers, in particular to an active microorganism coated slow release composite fertilizer, which is prepared from the following raw materials by weight part: 10-15 of 1250-2000 mesh diatomite, 10-12 of triple superphosphate, 15-18 of potassium dihydrogen phosphate, 20-22 of urea, 18-20 of ammonium carbonate, 10-12 of boric magnesium fertilizer, 14-15 of plant fallen leaves, 7-8 of soy bean residue, 0.02-0.03 of a JT strain, 1-2 of ammonium molybdate, 5-6 of Oenanthe javanica, 1-2 of freshwater shrimp shell powder, 10-12 of crop straw, 8-10 of peanut meal, 1-3 of radix isatidis, 6-8 of fermented chicken manure, 10-12 of porous starch, 1-3 of sodium trimetaphosphate, 4-6 of acrylic acid, 6-8 of polyvinyl alcohol, 0.1-0.2 of ammonium persulfate, 3-5 of cherry stone powder, 2-4 of orange peel, 15-18 of fermented alga liquid, and 4-5 of an additive. The composite fertilizer provided by the invention has wide material sources and comprehensive and rich nutrients, and in terms of the production technology, diatomite and an active slow release coating agent are utilized to form dual coating on nutrients, so that the fertility can be more lasting, and the soil vitality can be improved, plant diseases and insect pests can be reduced, and the efficacy of enhancing crop yield and quality can be achieved.

A composite forage for green shrimp and river crab is prepared from 18 raw materials including wheat flour, fish powder, soybean cake, fish oil, choline chloride, etc.

The invention discloses a preparation method of a feed for healthy and high-yield cultivation of freshwater shrimps. The method comprises the steps of (1) raw material selection, (2) drying and crushing, (3) mixing, (4) fermentation, and (5) addition of preparations to obtain the finished feed. The preparation method of the feed for the healthy and high-yield cultivation of the freshwater shrimps is simple and convenient to operate, and easy to implement; the prepared feed provides organic matters, inorganic mineral substances and microelements essential to the growth of the freshwater shrimps according to the growth characteristics of the freshwater shrimps, and provides balanced nutrient substances such as proteins, amino acid and reproduction accelerants for the growth of the freshwater shrimps; in addition, the feed does not contain toxic or side components such as drugs and does not pollute a water body; toxic substances such as nitrite and sulfide in water can be decomposed by using fungi contained in the feed, and a good water quality regulation effect is achieved.

The invention provides a reinforced cultivating method of freshwater shrimp seedshrimp, which is a reinforced scientific and reasonable cultivating method of freshwater shrimp seedshrimp with low investment and high efficiency in scales through the technologies of selecting seedshrimp in cultivating ponds, building a pond environment, optimizing and regulating water environment, feeding and managing scientifically and the like according to freshwater shrimp aquaculture biology and reproductive biology. The seedshrimp cultivated by the method in the invention can produce shrimp seedlings by over 20% compared with the seedshrimp cultivated by conventional methods under the same seedling conditions. The method in the invention can be used for the large-scale shrimp seedling production of high-quality fresh water shrimp, guarantee smooth promotion of high-quality fresh water shrimp, improve economic efficiency of fresh water cultivation, and improve healthy and sustainable development of fresh water shrimp cultivating industry in China.

The invention discloses a freshwater shrimp and river crab double main farming method which includes the steps that firstly, preparation is performed before farming; secondly, farming of seeds is performed; thirdly, under farming and management, freshwater shrimps are caught all the year round, the large freshwater shrimps are caught and the small freshwater shrimps remain; shrimps farmed in January are caught since May, and the large-specification freshwater shrimps are caught in time; shrimps farmed in August are caught since the end of September; river crabs are caught since October. According to the freshwater shrimp and river crab double main farming method, by increasing the freshwater shrimp farming percentage in a river crab farming pond and enhancing the freshwater shrimp farming management, the yield of the freshwater shrimps is improved, and the farming risks of river crabs are effectively avoided.

The invention provides a procambrus clarkii indoor artificial propagation method, belonging to the freshwater shrimp breeding technical field. The method includes the following steps: 1) sorting and group matching of parent procambrus clarkii; 2) temporary culture of the parent procambrus clarkii; 3) induction concentrated synchronous oviposition; 4) artificial incubation and sorting of spawning procambrus clarkii; 5) cultivation of young procambrus clarkii. The procambrus clarkii indoor artificial propagation method ensures that procambrus clarkii can be successfully propagated indoors by artificially regulating the propagation condition of procambrus clarkii. The method is simple and has strong feasibility, the spawning rate thereof reaches 84%, fertility rate reaches 90%, hatching rate reaches 86%, survival rate reaches more than 80%, the situation that procambrus clarkii postlarvae can be obtained only by natural propagation under the existing condition is changed, the problem that procambrus clarkii postlarvae is scare is solved, and stable and batch postlarvae production capacity is formed. Meanwhile female procambrus clarkiis synchronously lay eggs in a relative concentrated way while natural propagation is in droves and postlarvae can not be quantitatively obtained in time; postlarvae stocking can be carried out ahead of time; and postlarvae specification is relatively uniform.

The invention discloses freshwater shrimp ecological feed and a preparation method thereof. The ecological feed comprises the components of natural fish meal, earthworm powder, yellow mealworm powder, silkworm chrysalis meal, soybean cake powder, wheat bran, rice bran, yeast powder, carrot powder, flour, eggshell powder, shrimp shell powder, spirulina powder, radix astragali, radix isatidis, argy wormwood leaves, dried orange peel, fructus lycii, complex vitamins and an EM liquid. The preparation method comprises the steps of putting the above materials into a feed mixing machine according to the weight percentages, stirring for 40 minutes, granulating by an annular mold feed machine, drying, adding the EM liquid, and loading into bags after drying; and packaging. A formula provided by the invention is composed of a plurality of quality raw materials, and provides feed basis for producing quality freshwater shrimps. The feed prepared by the formula is comprehensive in nutrition and good in palatability, can be digested easily and absorbed fast; the freshwater shrimps grow strongly, have strong disease resistance and high culture survival rate. The freshwater shrimp ecological feed has wide available raw materials, can be operated easily and conveniently, and is reasonable in proportions and low in cost.

The invention discloses a growth promotion feed capable of improving the immunity of freshwater shrimps. The feed is prepared from, by weight, 20-40 parts of fish meal, 5-15 parts of bean pulp, 1-5 parts of shrimp shell powder, 1-3 parts of stillage, 2-5 parts of rapeseed meal, 3-6 parts of flour, 1-4 parts of soybean phospholipid, 3-4 parts of choline chloride, 2-4 parts of shelling agent, 1-3 parts of vitamin premix, 2-5 parts of sodium humate, 1-4 parts of betaine, 3-5 parts of L-carnitine, 0.5-1.5 parts of olaquindox, 2-4 parts of fluorite powder, 1-3 parts of cellulose, 2-4 parts of attapulgite, 3-6 parts of compound traditional Chinese medicine, 1-4 parts of synbiotics and 2-5 parts of complex enzyme preparation. By the adoption of the feed, the immunity of freshwater shrimps can be effectively improved, growth of freshwater shrimps can be promoted, and the yield and quality of freshwater shrimps are effectively improved.

The invention belongs to the technical field of shrimp aquaculture technology, in particular to a healthful aquaculture technology for freshwater shrimps from the young shrimp period to the adult shrimp period. The healthful aquaculture technology for the freshwater shrimps from the young shrimp period to the adult shrimp period includes a fully healthful method for raising the freshwater shrimps from the young shrimp period to the seedling period, each step uses the most reasonable aquaculture technology according to the life habits and morphological features of the freshwater shrimps, and the water sterilization, feed blending for the young shrimps and adult shrimps, water change, fertilization, green feed planting, rigid management and the like are designed reasonably. The feed for the young shrimps and adult shrimps is rich in nutrition needed for the freshwater shrimps at each growth stage. By means of the technical scheme, the young shrimps raised through the healthful aquaculture technology are featured with uniform size, short aquaculture period, much meat and good taste.

A two-stage efficient rearing method for freshwater shrimp fry includes the steps of 1, rearing parents, selecting young shrimps basically uniform in specification, and rearing the young shrimps in a special parent pond in early March; 2, breeding shrimp fry. Technical schemes are made for breeding pond conditions, parent shrimp stocking, fry rearing and the like; accordingly, the large-scale synchronous breeding is achieved, and unit rearing yield and fry quality can be increased greatly.

The invention discloses high-performance environment-friendly shrimp fodder and a preparation method thereof. The fodder for sea shrimps and freshwater shrimps is prepared by substituting raw materials, such as earthworm powder, snail powder, fly larvae powder, yeast, and the like for protein raw materials, such as fish meal, meat, bone meal, and the like, substituting peanut powder for soybean meal, substituting minor cereal tapioca for staple food grain, such as corn, wheat, and the like, and substituting the mechanism effects of peptide substances in maggot powder, enzymes of earthworm powder, enzymes of a multifunctional plasminogen activator, microbial probiotics flora, pathogenic bacteria inhibitor, and the like for chemical growth hormones and chemical medical antibiotics. The high-performance environment-friendly shrimp fodder is characterized by being prepared from the following raw materials by weight parts: 30-50 parts of virus-free cassava, 10-20 parts of earthworm powder, 5-20 parts of snail powder, 5-15 parts of fly larvae powder, 6-20 parts of yeast, 5-10 parts of peanut powder, 1-4 parts of garlic powder, 1-4 parts of mineral trace elements, 2-5 parts of amino acids, 0.5-2 parts of lecithin, 0.5-2 parts of vitamins, 0.5-3 parts of multifunctional plasminogen activator and 0.5-3 parts of microbial probiotics. The invention has the advantages of improved fodder quality, decreased production cost, improved safety rate of culture food, and the like.

The invention relates to the water quality purification field, and especially relates to a method for purifying water quality; the method achieves a purpose of purifying the water quality by pond culture of Chinese mitten crab. The method for purifying the water quality includes the following steps: desilting and tidying a pond, namely carrying out desilting treatment on excessive silt in the crab pond; clearing and drying the pond, namely mixing quick lime, a bleaching powder and tea meal and clearing the pond; putting aristichthys nobilis and a first generation of freshwater shrimps in the middle ten days of February; putting crab seedlings in the first ten days of March; putting margarya melanoides before and after Tomb-sweeping Day in batches; harvesting the freshwater shrimps with a ground bamboo cage in the middle ten days and the last ten days of June; putting a second generation of freshwater shrimps in the first ten days of July; harvesting the crabs, the freshwater shrimps and the aristichthys nobilis from October to November; and during the culture process, carrying out fertilization water treatment and planting waterweeds in the crab pond. Through the intercropping breeding mode, aquatic products are cultured while the water quality is purified, and the obtained cultured river crabs have good quality.

The invention relates to a freshwater shrimp cultivation method, in particular to a pollution-free freshwater shrimp cultivation method according to which hybridization is adopted and fish larvae are matched for cultivation together. The pollution-free freshwater shrimp cultivation method includes the following steps of shrimp pond requirements, shrimp pond treatment, hybridization, shrimp larvae breeding, feeing management, water quality management and density control. The pollution-free freshwater shrimp cultivation method makes the most of idle resources for production, standardizes cultivation techniques, and obtains high-quality offspring seeds for cultivation after Lake Taihu youth shimps and local shrimps are hybridized; moreover, when a second generation of freshwater shrimps are reproduced, the fish larvae are bred, on the one hand, small shrimp larvae can be used as feed of the fish larvae, and on the other hand, space is saved by the small shrimp larvae which are eaten and oxygen consumption is reduced, and therefore unified specifications and high output of the freshwater shrimps are ensured.

The invention relates to a health maintenance agent for waterweeds in an aquaculture pond of freshwater shrimps and crabs, belonging to the technical field of aquaculture. The health maintenance agent is characterized by comprising the following components in parts by weight; magnesium sulfate, potassium chloride, ferrous sulphate, boric acid and compound sodium nitrophenolate are weighed according to the percentage and uniformly mixed at the normal temperature; the components are uniformly mixed with the monocalcium phosphate, sodium humate, polyaluminum ferric silicate and zeolite powder according to the percentage and finally packaged. The invention is convenient to use and not influenced by the environmental condition and has low dosage; after use, the invention quickly becomes effective, has stable effect, and is capable of quickly improving the growth of the waterweeds in the pond and removing the sludge and attachments on the surfaces of the waterweeds, so that the waterweeds have developed root system, clear surface and dark green color and are healthy and stable. The contents of nitrogen and phosphorus in the pond water are reduced effectively; the environmental quality of the pond is improved; the survival condition of shrimps and crabs is improved, the calcium source of water is supplied reasonably, and the growth and the quality of the shrimps and crabs are improved.

The invention discloses high-protein freshwater shrimp antibacterial growth promoting feed. The feed is prepared from, by weight, 25-45 parts of soybean meal, 15-25 parts of peanut meal, 5-15 parts of corn starch, 3-9 parts of fish meal protein, 2-5 parts of inkfish paste, 1-4 parts of shrimp shell powder, 3-5 parts of fermented enzymatic soybean meal, 3-5 parts of fish oil, 1-4 parts of soybean oil, 2-5 parts of soybean lecithin, 1-3 parts of cholesterol, 2-4 parts of choline chloride, 1-3 parts of vitamin E, 2-5 parts of vitamin C, 1-4 parts of smashed garlic, 2-5 parts of povidone iodine, 3-6 parts of rhubarb, radix scutellariae and cortex phellodendri powder, 1-4 parts of medical stone, 2-5 parts of phytase, 2-6 parts of composite bacillus, 2-5 parts of coated amino acid, 1-5 parts of mineral premix, 3-5 parts of Chinese herbal medicine additive and 2-6 parts of sodium carboxymethyl cellulose. The freshwater shrimp feed is high in protein content, has the antibacterial and growth promoting effect, effectively increases the yield of freshwater shrimps and effectively improves quality of freshwater shrimps.

The invention discloses a crucian feed comprising the following raw materials: by weight, 10-12 parts of miscellaneous fish meal, 30-35 parts of rapeseed meal cake, 12-15 parts of soybean meal, 4-6 parts of freshwater shrimp powder, 4-5 parts of corn protein powder, 30-35 parts of vinasse, 20-24 parts of strong flour, 1-2 parts of lecithin, 3-5 parts of black bean, 2-3 parts of red jujube, 1-2 parts of rock sugar, 2-3 parts of bulbophyllum radiatum, 1-2 parts of isodon amethystoides, 3-4 parts of monochasma savatieri Franch. ex Maxim, 2-3 parts of polyalthia nemoralis A.DC., 3-4 parts of rubiaceae borreria stricta, 1-2 parts of arundina chinensis and 2-3 parts of a feeding promoting agent; the crucian feed is reasonable in nutritional component ratio, suitable for eating by crucian to quicken growth speed, not easy to loose in the water, convenient for the crucian to taking in for eating, less in waste, and less in water pollution, effectively improves the meat quality and nutrition values of the cultured crucian, and can promote the growth of the crucian.

A symbiotic culture method of shrimps, soft-shelled turtles and rice comprises the following steps: (a) selecting five or more mu rice fields as a feeding pool of shrimps and soft-shelled turtles, ditching on the periphery of the feeding pool and arranging soft-shelled turtle escape-proof devices on the edges of the ditches at the depth ranging from 80 to 120 centimeters, wherein the percentage of the ditches in the feeding pool is ranging from 20% to 30% per mu; (b) sowing rice seeds in June with the density of rice transplanting ranging from 70% to 80% and managing the rice fields in a conventional way after rice transplanting until the rice is harvested in the first ten-day period of November; (c) breeding shrimp species in a free-range manner, particularly putting shrimps with shrimp eggs weighing 1 to 1.5 kilograms per mu in the rice fields in May and putting baby shrimps weighing 5 to 7.5 kilograms per mu in the rice fields in July; (d) breeding soft-shelled turtle species in a free-range manner, particularly putting in 15 to 25 baby soft-shelled turtles weighing 125 grams to 175 grams per mu in the rice fields in April, collecting and enabling the soft-shelled turtles to come into season at the Spring Festival. The symbiotic culture method of shrimps, soft-shelled turtles and rice is a kind of recycling economy and an environmental-friendly cultivation technique in a high-quality and efficient environment. Accordingly, freshwater shrimps are fed in the rice fields, soft-shelled turtles are put in a shrimp feeding pool, the shrimps eat injurious insects in the rice fields, the soft-shelled turtles eat baby shrimps bred by the shrimps and feces of the shrimps are absorbed by the rice. The symbiotic culture method is a high-quality, efficient and clean culture production chain.

The invention discloses a freshwater shrimp ecological pond culture system. The system comprises a freshwater shrimp culture pond, an aquatic economic plant planting region and a silver carp and bighead carp culture pond, which are arranged in sequence and are communicated with each other, wherein an artificial shrimp nest is arranged in the freshwater shrimp culture pond and is used for stocking freshwater shrimps; houttuynia cordata and water spinaches are planted in the aquatic economic plant planting region; the silver carp and bighead carp culture pond are used for stocking silver carps and bighead carps; pond water circulates among the freshwater shrimp culture pond, the silver carp and bighead carp culture pond, the aquatic economic plant planting region and the freshwater shrimp culture pond. The system has the beneficial effects that the stocking density is improved by arranging the artificial shrimp nest; the freshwater shrimp culture pond water after culture provides baits for the silver carps and the bighead carps and provides nutrients for aquatic economic plants, thus the water is purified and flows into the freshwater shrimp culture pond again; under the condition of the same culture area, the freshwater shrimp yield is increased by 3-4 times and the yields of the silver carps and the bighead carps and the aquatic economic plants are substantially increased, and the drug dose is greatly reduced or even drugs are not used, thus achieving efficient ecological culture of freshwater shrimps.