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1缺氧在一般情况下,越冬水体严重缺氧是造成鱼类死亡的主要原因,造成缺氧的原因有：1．1浮游动物的生物量过大,成为水体重要耗氧因子,如果每升水体中轮虫超过1000个时,说明浮游动物过多。对策：可用0．3～0．4×10~(-6)的晶体敌百虫全池泼洒。此外轮虫和原生动物对漂白粉很敏感,用使池水含有效氯1×10~(-6)的量施用漂白粉,可控制其数量。
1 Hypoxia Under normal circumstances, the severe hypoxia in overwintering water bodies is the main cause of fish death. The causes of hypoxia are as follows: 1.1 The biomass of zooplankton is too large and becomes an important oxygen consumption factor of water bodies. If per liter of water More than 1000 rotifers in the body indicate too much zooplankton. Countermeasures: available 0.3 ~ 0.4 × 10 ~ (-6) crystal trichlorfon Quanchiposa. In addition, rotifers and protozoa are very sensitive to bleaching powder. The amount of bleaching powder can be controlled by using 1 × 10 ~ (-6) of effective chlorine in water.