近年来,由于缺乏生态环境保护意识,片面强调高产值和养殖规模的扩大,一些养殖池塘受污染的程度超过其自净能力,长期积累的负面效应引起生态系统的退化。轻者导致养殖效益下降,重者导致养殖对象的大批死亡。在本实验中,将异育银鲫和菹草混养在室外池塘中,建立鱼草共生系统。监测水体主要的理化因子的变化规律,测定异育银鲫的生长情况。从而探讨网箱养草对养殖水体主要营养盐的去除效果。试验结果表明:菹草具有明显的净化作用,可以有效的吸收TP和TN,增加水体DO,稳定水体,并能促进异育银鲫的生长。 In recent years, some aquaculture ponds have been contaminated more than their self-purification capacity due to the lack of awareness of environmental protection and one-sided emphasis on high-yielding and scale-up of aquaculture. The negative effects of long-term accumulation have caused ecosystem degradation. The light led to the decline of breeding efficiency, which led to a large number of aquaculture deaths. In this experiment, Allogynogenetic crucian carp (Carassius auratus gibelio) and Ephemera were mixed in outdoor ponds to establish the fish-grass symbiosis system. The main physical and chemical factors of water body were monitored to determine the growth of allogynogenetic crucian carp. In order to explore the net cage culture of aquaculture water removal of the main nutrients. The results showed that: the grass has a clear purifying effect, can effectively absorb TP and TN, increase DO, stabilize the body of water, and can promote the growth of allogynogenetic crucian carp.