| Impacts of population growth and economic development on the nitrogen cycle in Asia |
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| 作者姓名： | ZHU Zhaoliang XIONG Zhengqin& XING Guangxi State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing China |
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| 作者单位： | ZHU Zhaoliang，XIONG Zhengqin& XING Guangxi State Key Laboratory of Soil and Sustainable Agriculture，Institute of Soil Science，Chinese Academy of Sciences，Nanjing 210008，China |
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| 摘 要： | Asia is the major consumer of fertilizer nitrogen and energy in the world, and consequently shares a considerable proportion of the world creation of reactive nitrogen (Nr). However, if estimated on per capita basis, Asia is characterized by a lower arable land area, fertilizer nitrogen consumption, energy consumption, and gross domestic product, as well as lower daily protein intake. To meet the increasing needs for food and energy for the growing population combined with the improvement of living standards, Nr will inevitably increase. The present study estimates the creation of Nr and the emissions of various N compounds into environment in Asia currently and in 2030. In comparison with the world averages, the lower fertilizer nitrogen and energy use efficiencies, and the lower use of animal wastes for agriculture imply that there is potential for moderating the increase in Nr and its impacts on the environment. Strategies for moderating the increase are discussed.
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Impacts of population growth and economic development on the nitrogen cycle in Asia |
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| ZHU Zhaoliang,XIONG Zhengqin& XING Guangxi State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing ,China.Impacts of population growth and economic development on the nitrogen cycle in Asia[J].Science China Life sciences,2005,48(Z2). |
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| Authors: | ZHU Zhaoliang XIONG Zhengqin& XING Guangxi State Key Laboratory of Soil and Sustainable Agriculture |
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| Institution: | ZHU Zhaoliang,XIONG Zhengqin& XING Guangxi State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China |
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| Abstract: | Asia is the major consumer of fertilizer nitrogen and energy in the world, and consequently shares a considerable proportion of the world creation of reactive nitrogen (Nr). However, if estimated on per capita basis, Asia is characterized by a lower arable land area, fertilizer nitrogen consumption, energy consumption, and gross domestic product, as well as lower daily protein intake. To meet the increasing needs for food and energy for the growing population combined with the improvement of living standards, Nr will inevitably increase. The present study estimates the creation of Nr and the emissions of various N compounds into environment in Asia currently and in 2030. In comparison with the world averages, the lower fertilizer nitrogen and energy use efficiencies, and the lower use of animal wastes for agriculture imply that there is potential for moderating the increase in Nr and its impacts on the environment. Strategies for moderating the increase are discussed. |
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| Keywords: | reactive nitrogen Asia regional variation environment nitrogen flux |
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