在鱼类主要生长季节,必须时刻注意防止鱼类严重浮头和泛塘发生。一、浮头的原因1.因鱼池上、下水层急剧对流而引起浮头。炎夏晴天,精养鱼池水浓度大,白天浮游植物营光合作用释放大量氧气,水底层耗氧得不到补充,在厌氧菌的作用下产生很多氧债。至午后上层水中溶氧量达过饱和,由 In the main growing season of fish, care must be taken to prevent the occurrence of severe floating head and pan ponds. First, the reasons for the floating head 1 due to fish ponds, aquifers caused by the rapid convection floating head. In summer and summer, the concentration of intensive fish ponds is large. During the day, phytoplankton camphor leaves release a large amount of oxygen, and the water under the water layer can not be supplemented. As a result, many oxygen bonds are produced under the action of anaerobic bacteria. To the upper dissolved oxygen in the upper reaches of saturated water, by