浮头是鱼类在水中缺氧时出现的现象，若不采取解救措施，就会导致鱼类泛塘而死亡，所以，在生产中要加强管理，做好检查防救工作。一、浮头的原因1.水质变坏。由于水中浮游生物自繁过量，加上长时间阴雨天气，光线差，会使浮游生物大批死亡。死后尸体分解，引起细菌大量繁殖， Floating head is the phenomenon of fish in the water when the lack of oxygen, if not taken rescue measures, it will lead to pan-Tong fish and death, therefore, to strengthen management in production, good inspection and rescue work. First, the reasons for the floating head 1. Water quality deterioration. As plankton in the water from the excessive amount, combined with prolonged rainy weather, poor light, will make a large number of plankton deaths. The body decomposed after death, causing bacteria to multiply,