I. Pond conditions The pond is a near-square pond, with a width of 8 meters and a depth of 0.6 to 0.8 meters. The beach surface can lift water to 1.2 meters. The bottom of the pond is sandy soil, with less silt and good water quality. The water injection and drainage facilities are complete. There are two tons of cement vessels in the pond for feeding, fertilizing and managing. The inner side of the pond is buried in soil with a dense mesh of polyethylene mesh to protect slopes and prevent drilling, boring, crawfish, crabs and other drilling holes. The pool is firm and does not leak infiltration. Asbestos tiles are used to prevent escape. At the beginning of a breeding cycle, the ponds should be dredged and repaired, strictly disinfected with quicklime, tea seed cake and other drugs. After filtration and water injection, adequate base fertilizers are applied to cultivate natural foods, and aquatic plants such as wormwood and bittergrass are planted. Before and after “Qingming†A large number of live snails were released and allowed to reproduce naturally. Second, the stocking of crabs: before the month of stocking about 1,000 per kilogram of early and large eye larvae cultivated "bean crab" 86,000, equivalent to 1870 per mu. Green prawns: After clear ponds, young prawns can be stocked, between 3 kg and 5 kg per mu, or around 50 pounds of broodstock per kg before and after April, with an average of 0.5 kg per mu. Fish species: After rearing in the clear pond, about 20 kg per kg of heterotrophic crucian carp 200 kg, equivalent to 4.3 kg per acre; in the middle and late period due to aquatic plants growing too lush, stocking grass carp control aquatic plants, a total of 400 kg, an average of Mu 8. 6 kg.
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