鱼种经过越冬,体质下降了许多,抗病能力随之降低,早春气温回升后,鱼种需拉网分塘,机械创伤极易引起鱼种发生病害。因此抓住早春有利时机,尽早杀虫灭菌,消除病原体,对减少鱼种染病,提高成活率,增强体质,促进生长都有重要意义。一、抓住时机早清塘,未雨绸缪先预防养殖成鱼要突出 After the winter species, physical decline in many, the ability to reduce disease resistance, early spring temperatures rose, the species need to pull net sub-ponds, mechanical trauma can easily lead to fish diseases. So seize the favorable opportunity of early spring, as soon as possible insecticidal sterilization, eliminate pathogens, to reduce fish diseases, improve survival, enhance physical fitness and promote growth are of great significance. First, seize the opportunity Early Qing Tong, take precautions to prevent breeding into fish to be prominent