| 青海湖表层沉积物营养元素分布特征及相关性分析 |
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| 引用本文： | 陈学民,朱阳春,伏小勇,罗永清.青海湖表层沉积物营养元素分布特征及相关性分析[J].农业环境保护,2012(2):395-401. |
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| 作者姓名： | 陈学民 朱阳春 伏小勇 罗永清 |
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| 作者单位： | [1]兰州交通大学环境与市政工程学院,兰州730070 [2]中国科学院寒区旱区环境与工程研究所,兰州730000 |
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| 基金项目： | 国家科技重大专项专题（2009ZX07106-001-001） |
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| 摘 要： | 以青海湖11个样点的表层沉积物为研究对象,测定分析其营养元素总磷（total phosphorus,TP）、总氮（total nitrogen,TN）、溶解性磷酸盐（no-apatite inorganic phosphorus,NAIP）和总有机碳（total organic carbon,TOC）含量,并对其分布特征及相关性进行分析。结果表明：TP含量在0.36~0.71g·kg-1之间,平均值为0.59g·kg-1,变异系数为15.42%;TN平均含量为1.74g·kg-1,变异系数43.02%;TOC含量为18.60g·kg-1,变异系数46.61%;TN、TP、TOC含量间呈极显著（P〈0.01）的直线线性关系,NAIP与TN、TP和TOC含量间呈显著（P〈0.05）的S型曲线线性关系。分析表明,水深度、扰动程度等内源因素可影响青海湖表层沉积物中TN、TP及TOC含量,河流补给、旅游活动等外源输入及自然扩散对溶解性磷酸盐分布有一定的影响。
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| 关 键 词： | 青海湖 富营养化 表层沉积物 分布特征 |
Investigation of Eutrophic Elements Distribution and Their Correlation in Qinhai Lake Surface Sediments |
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| CHEN Xue-min,ZHU Yang-chun,FU Xiao-yong,LUO Yong-qing.Investigation of Eutrophic Elements Distribution and Their Correlation in Qinhai Lake Surface Sediments[J].Agro-Environmental Protection,2012(2):395-401. |
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| Authors: | CHEN Xue-min ZHU Yang-chun FU Xiao-yong LUO Yong-qing |
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| Institution: | 1. School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; 2. Cold and Arid Regions Envi- ronmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China) |
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| Abstract: | Based on the analysis of sediment samples taken from 11 spots at the surface sedimentary layer of Qinghai Lake, the contents of to- tal phosphorus （TP）, total nitrogen （TN）, no-apatite inorganic phosphorus （NAIP） and total organic carbon （TOC） were detected while the eutrophic component distribution and relevant correlation were investigated. The result indicated that TP contents were ranged from 0.36 to 0.71 g·kg-1 with the mean value of 0.59 g·kg-1, and the coefficient of variation 15.42% when the average content of TN was 1.74 g. kg-1 with the variation coefficient 43.02%, but 18.60 g·kg-1 for TOC content with an variation coefficient 46.61%. The significant.linear relationships （P〈0.01） among TN, TP and TOC were determined, respectively. It was found that the S-shaped curve relationships between NAIP and TN, TP and TOC were apparently formed at the level of 0.05. The study showed that the effects of depth of overlying water and disturbance extent were the key factors to impact the contents of TP, TN and TOC in Qinghai Lake. Additionally, the effects of outer source inputs resulted by river recharges, tourist activities and dismission also had a certain influence on distribution of NAIP in Qinghai Lake. |
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| Keywords: | Qinghai Lake eutrophication surface sediments distribution characteristics |
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