| Is Precipitation the Dominant Controlling Factor of High Inorganic Nitrogen Content in the Changjiang River and Its Mouth？ |
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| 引用本文： | 沈志良.Is Precipitation the Dominant Controlling Factor of High Inorganic Nitrogen Content in the Changjiang River and Its Mouth？[J].中国海洋与湖沼学报,2003,21(4):368-376. |
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| 作者姓名： | 沈志良 |
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| 作者单位： | KeyLaboratoryofMarineEcologyandEnvironmentalScience,InstituteofOceam~logy,ChineseAcademyofSciences,Oingdao266071,China |
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| 基金项目： | ProjectNo.498760 2 0supportedbyNSFCandKZ95 2 S1 42 1fromtheChineseAcademyofSciences，andalsosupportedby
SX( 97) 1 1 4. |
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| 摘 要： | The main reasons for the high content of inorganic N and its increase by several times in the Changjiang River and its mouth during the last 40 years were analysed in this work. The inorganic N in precipitation in the Changjiang River catchment mainly comes from gaseous loss of fertilizer N, N resulting from the increases of population and livestock, and from high temperature combustions of fossil fuels. N from precipitation is the first N source in the Changjiang River water and the only direct cause of high content of inorganic N in the Changjiang River and its mouth. The lost N in gaseous form and from agriculture non-point sources fertilizer comprised about 60% of annual consumption of fertilizer N in the Changjiang River catchment and were key factors controlling the high content of inorganic N in the Changjiang River mouth. The fate of the N in precipitation and other N sources in the Changjiang River catchment are also discussed in this paper.
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| 关 键 词： | 显性因素 控制 氮 无机物 长江口 |
| 收稿时间： | 9 May 2003 |
Is precipitation the dominant controlling factor of high inorganic nitrogen content in the Changjiang River and its mouth? |
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| Shen?Zhiliang.Is precipitation the dominant controlling factor of high inorganic nitrogen content in the Changjiang River and its mouth?[J].Chinese Journal of Oceanology and Limnology,2003,21(4):368-376. |
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| Authors: | Shen Zhiliang |
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| Institution: | (1) Key Laboratory of Marine Ecology and Environmental Science, Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China |
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| Abstract: | The main reasons for the high content of inorganic N and its increase by several times in the Changjiang River and its mouth during the last 40 years were analysed in this work. The inorganic N in precipitation in the Changjiang River catchment mainly comes from gaseous loss of fertilizer N, N resulting from the increases of population and livestock, and from high temperature combustions of fossil fuels. N from precipitation is the first N source in the Changjiang River water and the only direct cause of high content of inorganic N in the Changjiang River and its mouth. The lost N in gaseous form and from agriculture non point sources fertilizer comprised about 60% of annual consumption of fertilizer N in the Changjiang River catchment and were key factors controlling the high content of inorganic N in the Changjiang River mouth. The fate of the N in precipitation and other N sources in the Changjiang River catchment are also discussed in this paper. |
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| Keywords: | precipitation inorganic nitrogen fertilizer control factor Changjiang River and its mouth |
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