(一)鱼池保水力要强 作为鱼种越冬池的底质以黄粘土较好。沙质底虽然有机质少,但容易渗漏,不能保水,一般不在这样的地区修建越冬池。如利用自然沼泽修建越冬池,一定要经过很好的清理改造,挖除含腐殖质过多的淤泥和杂草,因为池底有机质过多,会大量消耗水中氧气,影响越冬效果。 (A) fish pond water retention should be stronger as the bottom of the pool overwintering yellow clay better. Although the sandy bottom of organic matter less, but easy to leak, can not keep water, generally do not build winter pool in such areas. Such as the use of natural marsh to build wintering ponds, be sure to go through a good cleanup and transformation, digging with excessive humus and silt containing weeds, because too much organic bottom of the pond, will consume large amounts of oxygen in water, affecting the winter effect.