| 长三角地区典型稻作农业小流域氮素平衡及其污染潜势 |
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| 引用本文： | 杜伟,遆超普,姜小三,陈国岩.长三角地区典型稻作农业小流域氮素平衡及其污染潜势[J].生态与农村环境学报,2010,26(1). |
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| 作者姓名： | 杜伟 遆超普 姜小三 陈国岩 |
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| 作者单位： | 南京农业大学资源与环境科学学院,江苏,南京,210095 |
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| 基金项目： | 国家自然科学基金重大国际合作研究项目(40721140018) |
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| 摘 要： | 江苏省句容市陈武镇水库流域是以稻作为主的农业小流域,在长三角地区颇具典型性。于2007年5月至2008年4月在该流域进行定位观测与现场调查,通过估算氮素平衡来分析预测流域农田氮污染潜势。结果表明,研究时段内流域氮素输入量为1 589.1 t,输出量为1 168.4 t。化肥氮输入是农田氮素的最主要来源,占氮输入总量的67.2%;而作物收获是农田氮输出的主要方式,占氮输出总量的46.7%。水田和旱地氮平衡均处于盈余状态,盈亏率分别为20.5%和52.4%,氮素利用率分别为33.6%和34.9%,利用率较低。水田47.8%的氮素以气态形式损失,气态氮和储存在土壤中的氮素极易导致大气和水体污染。
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| 关 键 词： | 农业小流域 氮素平衡 水田 非点源污染 长三角地区 |
Balance and Pollution Potential of Nitrogen in a Typical Rice-Based Agricultural Watershed of Yangtze River Delta Region |
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| DU Wei,TI Chao-pu,JIANG Xiao-san,CHEN Guo-yan.Balance and Pollution Potential of Nitrogen in a Typical Rice-Based Agricultural Watershed of Yangtze River Delta Region[J].Journal of Ecology and Rural Environment,2010,26(1). |
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| Authors: | DU Wei TI Chao-pu JIANG Xiao-san CHEN Guo-yan |
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| Institution: | College of Resources and Environmental Sciences/a>;Nanjing Agricultural University/a>;Nanjing 210095/a>;China |
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| Abstract: | The Chenwu Town Reservoir Watershed of Jurong,Jiangsu Province,is a typical rice-based agricultural watershed in the Yangtze River Delta region of China.Based on the data collected from stationary observation and field investigation of the rice-based agricultural watershed from May 2007 to April 2008,nitrogen flow was balanced for the analyses and prediction of pollution potential of the farmland nitrogen to the watershed.Results show that the total input of nitrogen was 1 589.1 t,while the total output of ... |
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| Keywords: | agricultural watershed nitrogen balance paddy field non-point source pollution Yangtze River Delta region |
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