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浮头的原因1、因上下层水温差所引起的浮头。在高温季节,高产池塘水质很浓, 池塘下层光照很弱,光合作用不强,加之大量有机物(残饵、粪便、有机碎屑),分解耗氧,下层水氧气很少。表层水虽然氧气较高,但由于水温高,水的密度小,上下水层水不易对流。当遇到闷热、有风、雷阵雨的天气,使表层水温急剧下降,产生水温差, 因而使整个池塘的氧气迅速降低,造成缺氧浮头。还可能伴随出现有毒的还原性物质, 如硫化氢等,促使鱼类浮头。2、因光合作
The reasons for floating head 1, due to the difference between the upper and lower water temperature caused by the floating head. In the hot season, high-yielding ponds have very strong water quality. The ponds have poor light and poor photosynthesis. In addition, a large amount of organic matter (bait, manure, organic debris) decomposes oxygen and there is very little oxygen in the lower layer. Although the surface water is high in oxygen, due to the high water temperature and the low density of water, the upper and lower aquifers are not easily convective. When faced with hot, windy, thunderstorms, the surface temperature dropped sharply, resulting in water temperature difference, so that the entire pond oxygen rapidly reduced, resulting in hypoxic floating head. May also be accompanied by the emergence of toxic reducing substances, such as hydrogen sulfide, to promote fish floating head. 2, due to light cooperation