养过鱼的池塘,由于残渣、污物很多,在池底积满 了致密的淤泥。这些淤泥中又因为没有空隙,不能保存 氧气,一些有机质在缺氧的情况下不仅不能很好的进行 分解,反而还会产生大量有毒的硫化氢气体,一旦水温 升高就会消耗掉池水中的大量溶解氧,对鱼危害很大。 所以养过鱼的池塘在第2年鱼种放养前,首先要把池塘 清整好,这是改善鱼类环境的一项重要工作。 Pond raising fish, due to debris, dirt, accumulated in the bottom of the pool of dense sludge. Since these silts have no voids and can not store oxygen, some of the organic matter in the absence of oxygen not only can not be well decomposed, but also produces a large amount of toxic hydrogen sulfide gas. Once the water temperature rises, the water will be consumed The large amount of dissolved oxygen, a great harm to fish. Therefore, before the second year of stocking of ponds for raising fish, it is necessary to clean up the ponds first. This is an important task for improving the fish environment.