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当前位置: 首页 > 文章 > 阳澄湖网围养殖区水体营养盐的时空变化与水质评价 水生态学杂志 2010,03 (6) 23-29
Position: Home > Articles > The Spatial and Temporal Changes of Nutrients of Net-pen Aquaculture Area in Yangcheng Lake and its Water Quality Evaluation Journal of Hydroecology 2010,03 (6) 23-29

阳澄湖网围养殖区水体营养盐的时空变化与水质评价

作  者：
宋学宏;邴旭文;孙丽萍;郭培红;杨彩根;顾海东
单  位：
苏州大学基础医学与生物科学学院;苏州市环境科学研究所;中国水产科学研究院淡水渔业研究中心
关键词：
网围养殖;营养盐;时空变化;湖泊污染;阳澄湖
摘  要：
2008年5月～2009年5月在阳澄湖中湖网围养殖区采集上、下层水样进行水质检测,并采用营养状态指数法对养殖区营养状况进行综合评价。结果显示:(1)养殖区营养盐的分布存在明显的时空变化,除了硝酸盐以外,所测指标均表现为养殖季节高于非养殖季节,高密度养殖区高于低密度养殖区,底层水高于表层水,说明高密度养殖造成氮磷的大量沉积。(2)高密度养殖区呈重度富营养状态,低密度养殖区也达到中度富营养。(3)2008年5月与2009年5月同期的水质监测数据显示,单季养殖的湖泊水质变化不明显;本研究表明,短期养殖对水质影响较小,但长期养殖则影响明显;网围养殖区富营养化日趋严重,目前已接近重度富营养状态,且磷污染较氮污染严重。
译  名：
The Spatial and Temporal Changes of Nutrients of Net-pen Aquaculture Area in Yangcheng Lake and its Water Quality Evaluation
作  者：
SONG Xue-hong1,Bing Xu-wen2,SUN Li-ping1,GUO Pei-hong1,YANG Cai-gen1,GU Hai-dong3 ( 1. School of Basic Medicine and Biological Sciences,Suzhou University,Suzhou 215123,China; 2. Freshwater Fisheries Research Center,Chinese Academy of Fishery Sciences,Wuxi 214081,China; 3. Suzhou Institute of Environmental Science,Suzhou 215004,China)
关键词：
Net-pen aquaculture; Nutrients; Spatial and temporal change; Pollution in lakes; Yangcheng Lake
摘  要：
Beginning in May 2006 and ending in May 2009,surface and bottom water samples were collected in net-pen culture area in the middle of Yangcheng Lake,and were analyzed for water quality. The trophic state index ( TSI) values were calculated and adopted to comprehensively evaluate the trophic levels in the net-pen culture area. The results showed that 1) the nutrient concentrations in net-pen culture area exhibited obvious spatial and temporal variations,all the measured parameters,except for the concentration of NO3--N,were higher in culture period than in other periods,meanwhile,they were also higher in high-density culture area than in low-density area, and in bottom water than in surface water,which might reflect that massive nitrogen and phosphorus sediment formed due to high-density culture; 2) the trophic status increased to a high level in high-density culture area,and also increased to a moderate level in low-density area; and 3) water-quality monitoring data from the same period in May 2008 and in May 2009 indicated that no obvious change of water-quality in the lake was found in the single culture period. It suggested that short-term aquaculture had less effect on the water quality,while long-term aquaculture could bring up obvious effects. The eutrophication in net-pen culture area had become more and more serious,and the culture area was currently considered to attend nearly-severe eutrophic level,and phosphorus pollution posed more threat to the lake than nitrogen pollution did.

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