鱼类的密养是提高池塘商品鱼单位面积产量的有效途径之一。然而,当养殖密度提高时,池塘中枯萎的水藻和水生生物其新陈代谢的有机物,以残余饵料的形式在池中大量累积,其破坏作用达到非常严重的程度:白天光合作用产生的余氧远不能保障夜间良好的氧气状况。因此,养殖过程中出现了困 Fish stocking is one of the effective ways to increase the yield per unit area of ​​fish in ponds. However, as aquaculture density increases, the metabolized organics of withered algae and aquatic organisms in ponds accumulate in pools in the form of remnants of food, and their destructive effects are very severe: the oxygen produced by photosynthesis during the day can not be far Ensure good oxygen condition at night. Therefore, the process of breeding difficulties