为减少鱼类在冬季的死亡,笔者认为要抓好以下“六防”工作。 (一)防越冬池淤泥过多 越冬池内淤泥厚度一般保持在20厘米左右。若淤泥过多,有机物在分解时会大量消耗水体中氧气,使二氧化碳急剧上升,鱼类呼吸困难,影响代谢,造成大批死亡。因此,鱼类越冬池的淤泥不能过多。 In order to reduce the death of fish in winter, I think we should do a good job in the following “six prevention” work. (A) anti-winter pool too much silt overwinter pool silt thickness generally maintained at about 20 cm. If the sludge is excessive, the organic matter will consume a large amount of oxygen in the water when it is decomposed, so that the carbon dioxide will rise sharply, and the fish will have difficulty breathing and affect the metabolism, resulting in a large number of deaths. Therefore, the fish pond overwintering silt can not be too much.