鱼浮头在短时间内可致鱼大批死亡,我乡2002年就有七、八户,因未能及时采取增氧措施,造成巨大损失。为此,我们必须做好鱼浮头的预测、防治、应急工作。鱼浮头一般多发生在夏季,其主要原因有:①下午或傍晚雷阵雨后造成池塘水急剧对流;②光照不足,浮游植物的光合作用较差,溶氧供不 Floating fish heads can cause a large number of fish deaths in a short time. In 2002, there were seven or eight households in my country, causing huge losses due to failure to take oxygenation measures in a timely manner. To this end, we must make the prediction of fish floating head, prevention and control, emergency work. Floating heads generally occur in the summer, the main reasons are: ① afternoon or evening thunderstorms caused by the rapid convection pond water; ② lack of illumination, poor photosynthesis of phytoplankton, dissolved oxygen supply is not