Spatial Variation of P and N in Water and Sediments of Dianchi Lake, China

L(U) Jun-Jie; YANG Hao; GAO Li; YU Tian-Ying

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Spatial Variation of P and N in Water and Sediments of Dianchi Lake, China

机译：滇池水体和沉积物中磷和氮的空间变化

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Dianchi Lake is one of the most eutrophic lakes in China. In order to understand this eutrophication and to help control the pollution, this research investigated the spatial distribution of Kjeldahl nitrogen (K-N) and total phosphorus(TP) through analysis of bottom water and sediment (3 depths) samples collected at 118 sites around Dianchi Lake. The concentrations of K-N and TP for the lake bottom water in the Caohai part of the lake were much higher than those in the Waihai part, generally decreasing from north to south. In the sediments, the K-N concentration was higher in the Caohai part and the middle of the Waihai part. On the other hand, TP in the sediments was greater in the southern and western parts. Both K-N and TP had similar spatial distributions for the sediment samples of three different depths.Vertically, the K-N and TP concentration in the sediments decreased with an increase in depth. This was evidence that eutrophication and pollution of Dianchi Lake was becoming gradually more severe. Exterior factors including uncontrolled input of domestic and industrial effluents as well as non-point pollution around the lake were the main reasons for serious eutrophication; therefore, controlling these was the first step in reducing eutrophication of Dianchi Lake.

机译：滇池是中国最富营养的湖泊之一。为了了解这种富营养化并帮助控制污染，本研究通过分析在滇池周围118个地点采集的底水和沉积物（3个深度）样本，研究了凯氏氮（KN）和总磷（TP）的空间分布。该湖草海部分湖底水的K-N和TP浓度远高于外海部分，通常从北向南降低。在沉积物中，草海部分和外海中部的K-N浓度较高。另一方面，南部和西部沉积物中的总磷较高。三种不同深度的沉积物样品的K-N和TP均具有相似的空间分布。垂直方向上，沉积物中K-N和TP的浓度随深度的增加而降低。这证明滇池的富营养化和污染正在逐渐加剧。造成富营养化严重的主要原因是外部因素，包括家庭和工业废水的不受控制的输入以及湖泊周围的面源污染。因此，控制这些是减少滇池富营养化的第一步。

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来源
《土壤圈（英文版）》 |2005年第1期|78-83|共6页
作者
L(U) Jun-Jie; YANG Hao; GAO Li; YU Tian-Ying;
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作者单位

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
nitrogen; phosphorus; sediments; spatial distribution; water;

机译：氮;磷;沉积物;空间分布;水;

Spatial Variation of P and N in Water and Sediments of Dianchi Lake, China

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