池塘养鱼实行混养密放后 ,投饵施肥多 ,密集的鱼群和大量的浮游生物、底栖生物、好气性细菌等呼吸以及它们排泄的粪便和其它有机物在分解过程中都需要消耗大量的氧。随着气温升高和鱼类的生长 ,这样的池塘往往容易出现水中氧气不足。当缺氧严重 ,鱼类浮向水面呼吸时 ,如不及时 Pond fish farming in the mixed farming close, feeding more fertilization, intensive fish and a large number of plankton, benthic organisms, aerobic bacteria and other excretion and excretion of feces and other organic matter in the decomposition process requires a lot of consumption Of oxygen. As temperatures rise and fish grow, such ponds tend to be prone to under-water oxygen. When severe hypoxia, fish floating to the surface of the breath, if not timely