2013—2016年广西主要海水养殖区营养盐年际变化及富营养化评价

Annual Nutrient Variation and Eutrophication Assessment of Main Mariculture Area of Guangxi from 2013 to 2016

根据2013年至2016年广西四个主要海水养殖区的海洋环境监测调查数据,应用单因子法和富营养化指数法对广西四个主要海水养殖区营养盐年际变化及富营养化状况进行了分析评价。结果表明:防城港珍珠湾珍珠养殖区水质状况较好,DIN污染最严重的是钦州茅尾海大蚝养殖区,PO4-P污染最严重的是北海廉州湾海水增养殖区。综合2013—2016年,富营养化指数平均值最高的是钦州茅尾海大蚝养殖区(5.6),其次是防城港红沙大蚝养殖区(3.7),第三是北海廉州湾海水增养殖区(2.7),最小的是防城港珍珠湾珍珠养殖区(0.2)。

According to the marine environment monitoring data of four major mariculture areas of Guangxi from 2013to 2016,the annual variation of nutrients of the four major mariculture areas of Guangxi were evaluated and their eutrophication was assessed with a single factor method and a eutrophication index method,resxpectively.The results showed that the quality of the mariculture zone in Zhenzhu Bay,Fangchenggang Harbor was good.The most serious DIN was found in Qinzhou Maowei sea oyster breeding area.The worst pollution of PO4-P was found in the mariculture zone in Lianzhou Bay,Beihai.From 2013to 2016,eutrophication was the highest as was indexed averagely in Qinzhou Maowei sea oyster culture zones(5.6),which was followed by that in Fangchenggang Harbor red sand oyster culture area(3.7),that in the culture area of Lianzhou Bay,Beihai(2.7)and that in the mariculture zone in Zhenzhu Bay,Fangcheng Harbor(0.2)as the lowest.