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| 长江流域农业区非点源氮的平衡变化及其区域性差异 | |
| 引用本文： | 马广文,香 宝,银 山,郭建英,杨慧玲. 长江流域农业区非点源氮的平衡变化及其区域性差异[J]. 环境科学研究, 2009, 22(2): 132-137 |
| 作者姓名： | 马广文 香 宝 银 山 郭建英 杨慧玲 |
| 作者单位： | 中国环境科学研究院生态所,北京,100012;内蒙古师范大学,地理科学学院,内蒙古,呼和浩特,010022;中国环境科学研究院生态所,北京,100012;内蒙古师范大学,地理科学学院,内蒙古,呼和浩特,010022;北京林业大学,水土保持学院,北京,100083;辽宁师范大学,城市与环境学院,辽宁,大连,116029 |
| 基金项目： | 科学技术部社会公益项目 |
| 摘 要： | 建立长江流域农业区氮平衡变化模型，并在该模型的基础上，计算长江流域各县1990和2000年的氮平衡变化，然后汇总出全流域氮的输入、输出及剩余量. 计算结果显示，全流域农业区1990年氮的输入量为7.65×106 t/a，输出量为4.23×106 t/a，剩余量为3.42×106 t/a(其中进入水体2.05×106 t/a，残留在土壤中1.37×106 t/a)；2000年全流域农业区氮的输入量为10.22×106 t/a，输出量为5.44×106 t/a，剩余量为4.78×106 t/a(其中进入水体2.65×106 t/a，残留在土壤中2.13×106 t/a)；1990—2000年长江流域农业区氮输入量增加2.57×106 t/a，氮输出量增加1.21×106 t/a，剩余量增加1.36×106 t/a(其中进入水体氮变化量为0.60×106 t/a，残留在土壤中氮变化量为0.76×106 t/a). 重庆、上海、武汉、无锡、南昌、成都等地区氮进入水体的量变化较大，为今后长江流域农业区水体氮污染重点防治区. |
| 关 键 词： | 非点源 氮平衡变化 长江流域农业区 |
| 收稿时间： | 2008-05-08 |
| 修稿时间： | 2008-06-16 |
Budget Changes and District Diversity of Non-Point Source Nitrogen in Agricultural Fields in the Yangtze River Basin |
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| MA Guang-wen,XIANG Bao,YIN Shan,GUO Jian-ying and YANG Hui-lin. Budget Changes and District Diversity of Non-Point Source Nitrogen in Agricultural Fields in the Yangtze River Basin[J]. Research of Environmental Sciences, 2009, 22(2): 132-137 | |
| Authors: | MA Guang-wen XIANG Bao YIN Shan GUO Jian-ying YANG Hui-lin |
| Abstract: | Using a nitrogen budget change model of the Yangtze River basin''s agricultural fields, nitrogen budget change in all counties of the Yangtze River basin were counted, while N inputs, outputs and surpluses of the whole basin were obtained. The results indicated that N inputs, outputs and surpluses of the wholebasin in 1990 were 7.65×106, 4.23×106 and 3.42×106 t/a, respectively; among 1990 surpluses, 2.05×106 t/a went into water bodies and 1.37×106t/a remained in the soil. In 2000, N inputs, outputs and surpluses of the wholebasin were 10.22×106, 5.44×106 and 4.78×106 t/a respectively; among 2000 surpluses, 2.65×106 t/a went into water bodies and 2.13×106 t/a remained in the soil. In the Yangtze River basin''s agricultural fields from 1990to 2000, changes in N input, output, surpluses, surpluses into water bodies and remaining in soil were 2.57×106, 1.21×106, 1.36×106, 0.60×106 and 0.76×106t/a, respectively. Chongqing, Shanghai, Wuhan, Wuxi, Nanchang and Chengdu, all of which had much more N input into water bodies than other cities from 1990 to 2000, were important prevention and control regions of the Yangtze River basin''s agricultural fields. |
| Keywords: | non-point nitrogen budget change the Yangtze River basin agricultural filed |
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