Choose paddy fields with low topography and good water retention, with an area of ​​10 to 50 mu. The fields will be widened, heightened and reinforced, and excavated into ring-shaped ditch in paddy fields, transplanted with weeds, and the planting area will be about 10%. In late September, the stocking size will be 30g per mu. About 15 to 25 kilograms of broodstock, the ratio of male to female 2:1; in late April, the size of 250 to 500 pounds per kilogram of young larvae 1.0 to 15,000 per mu; timely control of water level, maintain the water in the fat; March From late to mid-May, increase the feeding, such as cakes, bean dregs, soybeans, snail meat, clam meat, lettuce leaves, ryegrass and so on. A round of catching and rotation was carried out to achieve continuous cropping of rice and shrimps, a total of rice and shrimp, and ecological breeding of crayfish.
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