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不同污染程度湖泊沉积物中不同粒级可转化态氮分布

王圣瑞 金相灿 焦立新

王圣瑞, 金相灿, 焦立新. 不同污染程度湖泊沉积物中不同粒级可转化态氮分布[J]. 环境科学研究, 2007, 20(3): 52-57.
引用本文: 王圣瑞, 金相灿, 焦立新. 不同污染程度湖泊沉积物中不同粒级可转化态氮分布[J]. 环境科学研究, 2007, 20(3): 52-57.
WANG Sheng-rui, JIN Xiang-can, JIAO Li-xin. Distribution of Transferable Nitrogen in Different Grain Size from the Different Trophic Level Lake Sediments[J]. Research of Environmental Sciences, 2007, 20(3): 52-57.
Citation: WANG Sheng-rui, JIN Xiang-can, JIAO Li-xin. Distribution of Transferable Nitrogen in Different Grain Size from the Different Trophic Level Lake Sediments[J]. Research of Environmental Sciences, 2007, 20(3): 52-57.

不同污染程度湖泊沉积物中不同粒级可转化态氮分布

基金项目: 国家重点基础研究发展计划(973)项目(2002CB412304)

Distribution of Transferable Nitrogen in Different Grain Size from the Different Trophic Level Lake Sediments

  • 摘要: 研究了污染程度不同的五里湖、月湖、东太湖和贡湖不同粒级沉积物中总可转化态氮以及各形态可转化态氮的含量与分布.结果表明:4个湖泊的沉积物各粒级中各形态可转化态氮的含量及其地球化学特征均不相同.强氧化剂可提取态氮(SOEF-N)是释放能力最弱的形态,为可转化态氮的主体,占总可转化态氮的66.97%~87.97%.离子交换态氮(IEF-N)结合能力最弱,是最容易被释放的形态,为可转化态无机氮的主体,占总可转化态氮的7.37%~22.25%.同一粒级中,各形态可转化态氮对氮循环的贡献为SOEF-N最大,IEF-N其次,强碱可浸取态氮(SAEF-N)与弱酸可浸取态氮(WAEF-N)最低.随着沉积物粒级的由粗到细,总可转化态氮以及各形态可转化态氮含量均呈逐渐增加趋势.沉积物细颗粒部分对氮循环的可能贡献占绝对的主体,是粗颗粒部分的几倍到几十倍.相比而言,污染程度轻的贡湖和东太湖沉积物无论总可转化态氮还是各形态可转化态氮,细颗粒部分的相对含量均低于污染程度重的五里湖和月湖沉积物.

     

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  • 刊出日期:  2007-06-25

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