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冬季水温低,鱼类主要集中底层栖息,由于耗氧量增加,易造成底层水体缺氧,使鱼类室息死亡,影响越冬成活率。下面介绍几种越冬鱼池的补氧措施:一、注肥水。将其它鱼池水质较肥的水,注入越冬鱼池。肥水浮游植物多,通过光合作用,能提高池水溶氧量。二、循环注水。将两个鱼池在池一角用水泥管连接,在另一角用机械将一池水抽向另一池中,形成两鱼池水体循环。由于水体与空气接触面增多,空气中的氧气深入水体中.提高了池水溶氧量。三、施有机肥。越冬鱼塘每亩施腐熟的有机肥200公斤,能促进浮游植物生长繁殖,增加水体光合作用能力,提高池水溶氧量。
In winter, the water temperature is low, and the fish mainly inhabit the bottom habitat. Due to the increase of oxygen consumption, it is easy to cause the hypoxia in the bottom water body and cause the death of fish in the room and affect the survival rate in winter. Here are several kinds of oxygen overwintering fish pond measures: First, note fertilizer. Other fish pond water more fat, into the winter fish pond. Fertilizer phytoplankton and more, through photosynthesis, can improve the dissolved oxygen in the pool. Second, water cycle. The two fish ponds in the corner of the pool with cement pipe connected to the other corner of a pool of water drawn to another pool, the formation of two fish pond water cycle. As the water body and air contact surface increases, the oxygen in the air deep into the water to improve the pool of dissolved oxygen. Third, the application of organic fertilizer. Overwintering fish ponds per acre applied 200 kilograms of organic fertilizer, can promote the growth and reproduction of phytoplankton, increase the ability of photosynthesis of water to improve the dissolved oxygen in the pool.