内蒙古乌梁素海底泥总氮空间分布特征  

Distribution Characteristics of TN in Sediment of the Wuliangsu Lake,Inner Mongolia

作　　者：赵锁志[1,2] 孔凡吉[2] 赵军[2] 王喜宽[1,2] 李世宝[2] 张青[2] 

机构地区：[1]中国地质大学水资源与环境学院,北京100083 [2]内蒙古自治区地质调查院,内蒙古呼和浩特010020

出　　处：《现代地质》2009年第1期82-85,共4页Geoscience

基　　金：中国地质调查局国土资源大调查省部合作项目“内蒙古河套农业经济区生态地球化学调查项目”(200414200005)

摘　　要：湖泊底泥作为湖泊湿地生态系统中氮素的主要源与汇,对氮素的生物地球化学循环具有重要意义。针对乌梁素海富营养化日趋严重和湿地面积逐渐萎缩的现象,研究了底泥总氮的分布规律及其地球化学特征。结果表明,底泥中总氮含量在水平方向上总体表现为西高东低的径向分异特征;其在乌梁素海沉积剖面上具有随深度增加含量递减的规律。乌梁素海底泥氮污染主要由人类活动引起;20世纪90年代,乌梁素海富营养化进程开始加速。通过研究湖泊底泥中氮素的分布规律及其地球化学特征,为乌梁素海富营养化的治理提供科学依据。As a main source and sink of nitrogen from lake wetland ecosystem, lake sediment has an important significance for biogeochemical cycle of nitrogen. In recent years, the Wuliangsu lake area is shrinking and europhication becomes more and more serious. Aiming to the above problems, spatial distribution law of total nitrogen （TN） content and its geochemical characteristics in sediment are studied in this paper. TN content in the west of the Wuliangsu lake is higher than that of the east area; TN content decrease with depth in sediment profile of the Wuliangsu lake. N pollution in sediments of the Wuliangsu lake is caused by human activity ; Eutrophication of the Wuliangsu lake started in 1990s. Studying the distribution law of nitrogen in lake sediment and its geochemical characteristics can provide scientific basis for the eutrophication control of the Wuliangsu lake.

关 键 词：总氮 底泥 分布特征 乌梁素海 内蒙古 

分 类 号：X523[环境科学与工程—环境工程] P641[天文地球—地质矿产勘探]