Coarse culture is a kind of culture method in which a small number of fish species are stocked in the intercepting river without feeding bait and relying entirely on natural biological bait in the water body. Semi-intensive cultivation is a kind of culture that has not reached the level of intensive cultivation, but has gone further than coarse culture. It means that after building a solid fish-stopping facility, a certain kind of fish needs some bait besides the natural biological bait in the water; Intensive cultivation is a way to simulate intensive cultivation in ponds. At present, it is the development direction of river fish culture to put a large number of fish species in rivers and feed them artificially.
The type and quantity of stocking should be determined according to the fat and thin water quality. In the river with rich water quality, about 550 culter culter culter with the specification of 10 cm can be stocked per mu, and silver carp, bighead carp, shad and other fish can be stocked at the same time, with 25% as appropriate, and some grass carp, bream bream, carp and crucian carp can be properly matched. When the water quality of the river is thin, about 350 culters with the specification of 12 cm can be stocked per mu, and bream and grass carp can be released at the same time, accounting for 20%, and silver carp and bighead carp account for about 10%.