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In order to make full use of water bodies and improve the overall economic efficiency of ponds, according to the principle of three-dimensional development of ecological circulation, the potential of pond production will be brought into play, a natural environment will be simulated, combined with specific conditions for production, scientific feeding methods will be emphasized, and the index of recultivation and restocking will be raised. In recent years, our town has vigorously promoted a new model of “pollution, snails, crabs, snails, and symbiosis with the pond†in pollution-free ponds, and achieved 34 kg of crabs per mu, 16 kg of green shrimp, 23 kg of crawfish, and 3.3 kg of yellow clams. The benefits of 16 kg of loach, 40 kg of grass carp and 13 kg of carp. First, pond conditions. The pond is nearly square, surrounded by 8 meters wide and 0.6-0.8 meters deep. The beach surface can lift water to 1.2 meters. The bottom of the pond is sandy soil with less silt. The water quality is good, and the water injection and drainage facilities are complete. One tonne of cement boat for feeding, fertilizing and managing. The inner side of the pond is buried in soil with a dense mesh of polyethylene mesh for slope protection and holes for flood prevention, cockroach, crayfish, and crabs. At the beginning of a breeding cycle, the ponds should be dredged and repaired, strictly disinfected with drugs such as quick lime and tea seed cake. After filtration and water injection, sufficient base fertilizers should be applied to cultivate natural foods, and aquatic plants such as Vallisneria and Elodea be planted. Second, the stocking of crabs: before the release of about 1,000 kilograms per kilogram of early broodstock larvae cultivated "bean crab", 1800 per mu. Green prawns: Young prawns can be reared after clear ponds, 3-5 kilograms per mu, or 80 pounds per kilogram of egg-bearing broodstock before and after April, 0.5 kg per mu. Fish species: After rearing clear ponds, about 20 rearing stocks of each type of silver bream, about 4.5 kg per mu, will be stocked. After the middle and late stages, the growth of aquatic plants is too lush, and 9 kg of grass carp will be used to control aquatic plants. Snails: A large number of snails and river clams were released before and after the Ching Ming Festival to allow them to reproduce naturally. Other species: The ponds that cultivate shrimps and crabs all year round have rarely used highly toxic pesticides to protect the natural resources of yellow trout, loach and crayfish in ponds. Generally do not need to put another seed, let it naturally reproduce and grow in the pond. In June of this year, only 30 kilograms per kilogram were planted in the aquaculture, 0.4 kilograms per acre, and about 40 kilograms per kilogram were added, 0.6 kilograms per acre. Third, fertilization feeding. As a result of adopting natural ecological breeding methods, natural baits (plankton, benthos, snails, river clams, aquatic plants, etc.) are cultivated and propagated with inexpensive fertilizers (chicken manure) and snails for free breeding by breeds. Artificial feeding is only a supplement. In the whole period, a total of 33 kg of soybean cake, 22 kg of bran, 22 kg of rice bran, and 43 kg of fodder such as small fish are fed to the bean cake. Feeding and fertilizing is based on the weather, water quality, the amount of natural food, the amount of cultured ponds, and the growing season. Fourth, water quality regulation. Check the pond once in the morning and evening, and add new water and oxygen at any time according to the weather, water quality, and floating head conditions. Under normal circumstances, water is added once a week. Each time the amount of water is added to the water in the pond, the water injection is generally 20-30 cm, and the dissolved oxygen is sufficient. The water level is relatively stable. The transparency is about 25 cm. The water quality is “Fat, live, tender, and cool. "The request. Every month, Quanchipa is splashed with lime to adjust the pH of the pool. Fifth, disease prevention and control. During the entire aquaculture production, the fish species were soaked with 3% saline for 10 minutes before stocking. Shrimp and crabs were stocked with 50 mg/up potassium manganate for 2-3 minutes. During the growing season, the bait is fed once every half month (50 kg bait plus 25 g oxytetracycline twice a day for 3 days). In addition, baits, tools, etc. are often disinfected with bleach. Six, product fishing. The clams, clams, crayfish, and crayfish are caught in cages all year round. After the "Chongyang" Festival, crabs were captured by hand in the poolside pond in the evening and were caught in cages. Until the end of November, the whole pond was caught and used for the next cycle.