优化养殖对东太湖水质的影响分析

Influence Analysis of Optimized Aquaculture on Water Quality of East Lake Taihu

为探究优化养殖方式对水环境的影响,对东太湖2个养殖区(养殖区1和养殖区2)以及从未进行过渔业养殖的区域(对照区)进行了水质分析,并利用单因子污染指数评价法对3个区域的水质进行了评价。结果表明,所有区域冬季(2月)的水质优于夏季(7月),其中养殖区2的水质最好,养殖区1次之,且都优于对照区的水质,表明东太湖的优化养殖模式并不会加重水体污染负荷。叶绿素a和其它环境因子的相关性分析表明,水温是影响叶绿素a浓度的关键因子,总磷浓度是影响叶绿素a浓度的限制因子。

In order to explore the effect of optimized aquaculture on water environment,we analyzed the water qualities of two zones (aquaculture zone 1 and aquaculture zone 2) and the control zone which was never farmed in East Lake Taihu,and evaluated the water qualities of three zones by a single-factor pollution index method.The results show that in all zones,the water quality in winter(February) is better than that in summer(July).Therein,the water quality of the aquaculture zone 2 is the best,followed by the aquaculture zone 1.The water quality of aquaculture zones is superior to that of the control zone,which indicates that the optimized aquaculture does not increase the pollution level of East Lake Taihu.Furthermore,the correlation analysis between chlorophyll a and other environmental factors shows that water temperature is the key factor affecting chlorophyll a concentration,while the total phosphorus concentration is the limiting factor for chlorophyll a.