First, choose a good fish species wintering pool: fish species wintering pool, an area of ​​about 3 acres, depth of 1.5-2 meters, into the drainage convenient.
Second, the wintering pool of fish species should be clear pond disinfection: before the release of fingerlings, pond pools should be reinforced to remove weeds; add 50-60 kg of lime per acre or bleaching powder 5-7.5 kg per acre dry pond disinfection.
Third, to master the fish species and pond overwintering time: wintering ponds and ponds, should be carried out at a water temperature of 5-10 °C. In front of the pond, the fish should be stopped for 2-3 days, and then the fish should be enclosed in a cage. The fish of the same size should be placed in the pool at a density of 20,000 per acre. The species size should not be too different. Big.
Fourth, strengthen the management of wintering pools for fish species: The management of wintering ponds for fish species should mainly focus on four. The first is to pile manure outside the pool to the sun. 150-200 kilograms of human and animal manure are piled up per acre, and then the amount of manure is properly piled up depending on the water. The second is to add new water to the pool from time to time to increase dissolved oxygen in the pool water. The third is that when the temperature decreases and the water surface is frozen, it is necessary to break ice in time. Fourth, the wintering pool should be kept quiet around, reducing the amount of fish due to frightened activities.
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