Pond culture must start from the winter and spring, lay a solid foundation for breeding, in order to better carry out scientific breeding management, in order to achieve the purpose of health, high yield, and high efficiency. Experts from fishery science and technology households reminded the farmers that the following technical measures should be taken in winter and spring pond culture:
1, and pond winter. In winter, fish ponds need to be dredged and trimmed, and the sales of fingerlings and adult fishes also need to be relatively concentrated, and fish ponds and adult fish should be treated in ponds. Fish ponds and ponds generally choose sunny days. In front of the pond, the fish nets are trained 1-2 times. During the process of pulling, transporting, transferring and stocking the fish, the operation must be light, so as to prevent the fish body from being infected and getting sick. Adult fish ponds are generally combined with sales pull nets.
2, remove the mud. After one year's use of the pond, the residual bait, feces and organic fertilizer produced by the cultivation are accumulated in the bottom of the pool, and the pond sludge is removed to reduce the pond load.
3, pool reinforcement. While clearing the mud, we must also level the bottom of the pond, remove weeds, repair channels, plug loopholes, reinforce ponds, and compact the pond walls to increase water retention in the ponds.
4, exposed fish ponds. After the ponds are dredged and trimmed, do not let the water drain immediately if the conditions permit. Let the bottom of the pond be exposed to the sun for 15-20 days. The sun at the bottom of the pool can not only kill the residual pathogenic micro-organisms in the pool, but also improve the permeability of the silt, so that the toxic and harmful substances are also degraded.
5, clear pond disinfection. Fish ponds must be disinfected before they are released. Commonly used clear pond drugs are lime, Qing Tang Ling, bleaching powder, etc., of which the best effect of lime. Clear pond disinfection should be carried out on a sunny day. The water depth should be maintained at about 10 cm, and the whole pool should be splashed with 50-80 kg/mu of lime.
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