养殖水体老化一般是指水体在长期养殖之后或在过分密养的条件下,生产性能下降、疾病频发、产量质量下降,甚至发生养殖品种大量死亡的现象。造成养殖水体老化的原因很多,如溶氧不足、有机物积累过多、氮磷比不当等。针对以上原因,要预防养殖水体的老化应做到如下几点。 Aquaculture water aging is generally refers to the water body after long-term culture or over-dense conditions, the decline in production performance, frequent diseases, the decline in yield and quality, and even large-scale death of cultured species phenomenon. Aquaculture water causes aging for many reasons, such as lack of dissolved oxygen, excessive accumulation of organic matter, inappropriate nitrogen and phosphorus and so on. For the above reasons, to prevent the aging of aquaculture water should do the following points.