2. Multi-species polyculture. Choose the collocation according to the different feeding habits and living water layers of fish. Its collocation ratio is: silver carp and bighead carp 50%, grass carp and bream 26%, carp and crucian carp 24%.
3. Stock quantity of fish species. It depends on the conditions of the reservoir, but it should not exceed the carrying capacity of the water body. Generally, there are 300 ~ 400 kinds of fish per mu in reservoirs with mixed culture of fish and mussels; The stocking capacity of a single fish reservoir can be larger, with more than 400 fish per mu. Reasonable feeding and fertilization. In order to achieve high yield and high efficiency of fish culture in small reservoirs, it is not enough to rely solely on natural bait in reservoirs, and artificial bait must be added. When applying fertilizer, pig manure and duck manure are generally not directly applied, and must be fermented first, but a small amount of pig manure can be washed into the warehouse by hydraulic power.
4. Build fish stopping facilities. Fishing facilities should be built, otherwise a large number of fish in the reservoir will escape, which will affect the catch rate of adult fish. The fish-stopping facilities in the reservoir can be built with nylon nets, bamboo shoots, barbed wire and steel bars. The mesh or spacing depends on the specifications of the stocked fish.