晚秋时节，当水温降至8℃以下时，鱼类基本停止摄食，此时鱼类即可井塘越冬。为了提供鱼类良好的越冬条件，降低鱼类越冬死亡率，据多年的实践经验，越冬池要做到“五个不宜”。一、淤泥不宜过多：越冬池淤泥最多应不超过20cm。淤泥过多，有机物分解时大量消耗水体中氧气．二氧 Late autumn season, when the water temperature dropped below 8 ℃, the fish basically stop feeding, at this time the fish can wintering Tong winter. In order to provide good conditions for overwintering fish and reduce the overwintering mortality of fish, it has been said for many years that winter over-winching ponds should be “not suitable for five reasons”. First, the sludge should not be too much: wintering pond sludge should not exceed 20cm. Excessive silt, a large number of organic matter decomposition consume water oxygen. Dioxygen