一、亲鱼池选择鳜鱼不耐低氧,水中溶氧要求在4毫克/升以上,以草鱼为主的亲鱼池,水质较清瘦,又经常冲水,水中溶氧丰富,符合鳜鱼的生长条件。以鲢、鳙为主的亲鱼池,池水中浮游生物丰富,昼夜溶氧变化很大,平常冲水相对少,在下半夜溶氧最低时,极容易引起鳜鱼因缺氧而浮头死亡。一般 First, the choice of broodstock Pomfret intolerance to hypoxia, dissolved oxygen in water requirements at 4 mg / L or more to grass carp-based broodstock, water quality more lean, and often washed water, dissolved oxygen rich in water, in line with the growth of catfish condition. In silver carp and bighead carp ponds, the plankton in the pond water is rich. The diurnal dissolution of dissolved oxygen is very large and the flushing water is relatively low. When the dissolved oxygen is lowest in the middle of the next night, it is very easy to cause the catfish to die due to lack of oxygen. general