| 太湖沉积物及孔隙水中氮的时空分布特征 |
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| 引用本文： | 张 彦,张 远,于 涛,宋晓娜,冯启言.太湖沉积物及孔隙水中氮的时空分布特征[J].环境科学研究,2010,23(11):1333-1342. |
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| 作者姓名： | 张 彦 张 远 于 涛 宋晓娜 冯启言 |
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| 作者单位： | 中国矿业大学环境与测绘学院;中国环境科学研究院河流与海岸带环境创新基地;中国石油大学(北京)资源与信息学院; |
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| 基金项目： | 国家重点基础研究发展计划(973)项目 |
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| 摘 要： | 通过2009年4月和9月2次大规模采样监测,研究了太湖沉积物和孔隙水中不同形态氮的时空分布规律.结果表明:太湖沉积物和孔隙水中不同形态的氮在垂向变化上没有明显的季节性差异.沉积物中氮在水平分布上表现为w(TN),w(NH4+-N)和w(NO3--N)在北部湖区和东部湖区较高,而在湖心区较低;在深度变化上,w(TN)从下往上逐渐增大,而w(NH4+-N)却呈相反的趋势,w(NO3--N)没有明显变化.沉积物中w(有机氮)占w(TN)的80%,二者之间有很好的相关性(R=0.894,P动态信息0.01),w(TN)主要受w(有机氮)影响.孔隙水中的氮在水平分布上表现为ρ(TN),ρ(NH4+-N)和ρ(NO3--N)与沉积物中的氮分布基本一致;垂直变化上,孔隙水ρ(TN)和ρ(NH4+-N)从下向上逐渐减小,而ρ(NO3--N)无明显变化规律;孔隙水中ρ(NH4+-N)占ρ(TN)的50%,二者之间也有很好的相关性(R=0.886,P0.01),ρ(TN)主要受ρ(NH4+-N)的影响.分析显示,2种介质中3种形态的氮有很好的相关性.对沉积物中不同类型的有机质和各形态氮的相关分析发现,沉积物中有机质的类型和含量是影响氮素迁移转化的重要因素.
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| 关 键 词： | 太湖 时空分布 沉积物 孔隙水 氮 |
| 收稿时间： | 2010/4/6 0:00:00 |
| 修稿时间： | 2010/7/8 0:00:00 |
Spatial and Temporal Distribution of Nitrogen Species in Sediment and Interstitial Waters of Taihu Lake |
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| ZHANG Yan,ZHANG Yuan,YU Tao,SONG Xiao-na and FENG Qi-yan.Spatial and Temporal Distribution of Nitrogen Species in Sediment and Interstitial Waters of Taihu Lake[J].Research of Environmental Sciences,2010,23(11):1333-1342. |
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| Authors: | ZHANG Yan ZHANG Yuan YU Tao SONG Xiao-na and FENG Qi-yan |
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| Institution: | ZHANG Yan1,2,ZHANG Yuan2,YU Tao2,SONG Xiao-na3,FENG Qi-yan1 1.School of Environmental and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China 2.River and Coastal Environment Research Center,Chinese Research Academy of Environmental Sciences,Beijing 100012,China 3.Faculty of Natural Resource and Information Technology,China Petroleum University(Beijing),Beijing 102249,China |
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| Abstract: | Based on vast sampling work conducted in April and September of 2009,the temporal and spatial distribution characteristics of various species of nitrogen in the porewater and sediments of Taihu Lake were analyzed.The results showed that the vertical distributions of nitrogen in different forms had no significant seasonal differences in either the porewater or the sediment.As for horizontal distribution,the contents of TN,NH4 +-N and NO3--N in the sediment were relatively higher in the northern and eastern r... |
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| Keywords: | Taihu Lake spatial and temporal distribution sediment interstitial water nitrogen |
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