初冬池水温度降到8℃以下时,鱼类基本停止摄食,这时进行并塘越冬最为适宜。但要保证并塘鱼的安全越冬,必须要做到以下六个“不宜”。一是淤泥不宜多。越冬池淤泥最多不要超过20cm。淤泥过多,有机物分解时会大量消耗水体中的氧气;导致二氧化碳含量急剧上升,当水中二氧化碳含量超 Early winter pool water temperature dropped below 8 ℃, the fish basically stop feeding, then the most suitable winter and pond. However, to ensure the safety of pond fish and wintering, we must achieve the following six “not suitable”. First, silt should not be more. Overwintering pond sludge up to not more than 20cm. Excessive sludge, organic matter decomposition will consume a large number of oxygen in water; lead to a sharp increase in carbon dioxide content, when the water content of carbon dioxide over