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泛池 鱼类需要氧气。当水中含氧量减少到一定程度时,鱼类感到呼吸困难,就要将口伸出水面吞取空气,这种现象称为“浮头”;如水中含氧量继续减少,鱼类就会大批死亡,甚至死光,这就是所谓泛池。鱼类如经常因短时缺氧而浮头,会有下颚突出的明显症状. 青鱼、草鱼、链、鳙通常在水中含氧1毫克/升时开始浮头,当水中的含氧低至0.4～0.6毫克/升时,就
Pond fish need oxygen. When the oxygen content in the water is reduced to a certain extent, the fish feel breathing difficulties and the mouth should be swallowed by air. This phenomenon is called “floating head”; if the oxygen content in water continues to decrease, the fish will be flooded Death or even death, this is the so-called pan-pool. Fish, such as often due to short-term hypoxia and floating head, there will be prominent symptoms of the lower jaw.Island fish, grass carp, chain, 鳙 usually start in the water when the oxygen 1 mg / L floating head, when the oxygen in the water as low as 0.4 ~ 0.6 Mg / l, it