| 太湖地区地表水氮污染源的评论 |
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| 作者姓名： | XIE Ying-Xin XIONG Zheng-Qin XING Guang-Xi SUN Guo-Qing ZHU Zhao-Liang |
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| 作者单位： | [1]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 （China） [2]National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou 450002 （China） [3]Department of Physics, Portland State University, Portland, Oregon 97207 （USA） |
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| 摘 要： | The nitrogen （N） pollution status of the 12 most important rivers in Changshu, Taihu Lake region was investigated. Water samples were collected from depths of 0.5-1.0 m with the aid of the global positioning system （GPS）. The seasonal variations in the concentrations of different N components in the rivers were measured. Using tension-free monolith lysimeters and ^15N-labeled fertilizer, field experiments were carried out in this region to determine variations of iSN abundance of NO3^- in the leachate during the rice and wheat growing seasons, respectively. Results showed that the main source of N pollution of surface waters in the Taihu Lake region was not the N fertilizer applied in the farmland but the urban domestic sewage and rural human and animal excreta directly discharged into the water bodies without treatment. Atmospheric dry and wet N deposition was another evident source of N pollutant of the surface waters. In conclusion, it would not be correct to attribute the N applied to farmlands as the source of N pollution of the surface waters in this region.
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| 关 键 词： | 太湖 表层水污染 氮污染 污染源 |
| 收稿时间： | 2006-09-09 |
| 修稿时间： | 2007-01-28 |
Assessment of nitrogen pollutant sources in surface waters of Taihu Lake region |
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| XIE Ying-Xin,XIONG Zheng-Qin,XING Guang-Xi,SUN Guo-Qing,ZHU Zhao-Liang.Assessment of nitrogen pollutant sources in surface waters of Taihu Lake region[J].Pedosphere,2007,17(2):200-208. |
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| Authors: | XIE Ying-Xin XIONG Zheng-Qin XING Guang-Xi SUN Guo-Qing and ZHU Zhao-Liang |
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| Institution: | State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xieyingxin@tom.com;National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou 450002 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xieyingxin@tom.com;Department of Physics, Portland State University, Portland, Oregon 97207 (USA);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xieyingxin@tom.com;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xieyingxin@tom.com;State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xieyingxin@tom.com |
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| Abstract: | The nitrogen(N)pollution status of the 12 most important rivers in Changshu,Taihu Lake region was investigated.Water samples were collected from depths of 0.5-1.0 m with the aid of the global positioning system (GPS).The seasonal variations in the concentrations of different N components in the rivers were measured.Using tension-free monolith lysimeters and 15 N-labeled fertilizer,field experiments were carried out in this region to determine variations of 15Nabundance of NO-3 in the leachate during the rice and wheat growing seasons,respectively.Results showed that the main source of N pollution of surface waters in the Taihu Lake region was not the N fertilizer applied in the farmland but the urban domestic sewage and rural human and animal excreta directly discharged into the water bodies without treatment.Atmospheric dry and wet N deposition was another evident source of N pollutant of the surface waters.In conclusion.it would not be correct to attribute the N applied to farmlands as the source of N pollution of the surface waters in this region. |
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| Keywords: | atmospheric dry and wet N deposition 15 N-labeled fertilizer N pollution sources in surface waters N runoff from the farmland Taihu Lake region |
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