一、放养密度过大。放养过量,鱼类争食不均,容易形成两级分化。另外水体环境易恶化,水质不易控制,极易发生缺氧泛池事故,并且特别容易爆发大规模的鱼病,条件一般的渔池更应注意适当稀养。 二、品种搭配比例不当。品种搭配要充分考虑分层、分食的问题,如果放养比例不当,就会造成饵料利用不均,一方面缺食鱼类体弱多病,另一方面剩饵败坏水质,污染池塘。 三、喂养不当。投喂时要注意不要投喂腐烂、变质、带菌的食物,饵料要新鲜、适口、洗 First, stocking density is too large. Excessive stocking, fish fight uneven, easy to form two levels of differentiation. In addition, water environment is easy to deteriorate, water quality is not easy to control, prone to anaerobic pan-accident, and particularly vulnerable to large-scale outbreak of fish disease, the conditions of the general fishing pond should pay due attention to proper dilution. Second, the proportion of varieties with improper. Varieties with full account should be layered, the problem of eating, if the stocking ratio is not appropriate, it will lead to unequal use of food, on the one hand lack of food fatigued, on the other hand the bait corrupt water quality, pollute the pond. Third, improper feeding. Feeding should be careful not to feed decay, deterioration, food with bacteria, food should be fresh, palatability, wash