The global nitrogen cycle: Past, present and future

Food and energy production converts N2 to reactive N species that cascade through environmental reservoirs and in the process impact human and ecosystem health. This presentation will examine the impact of increased N mobilization on the global N cycle by contrasting N distribution in the late-19th century with those of the late-20th century. The presentation will give a general overview of regional differences and will conclude with a projection of the global N cycle for 2050.

作 者： James N. Galloway   作者單位： Environmental Sciences Department, University of Virginia, Charlottesville Virginia 22904, USA  刊 名： 中國(guó)科學(xué)C輯（英文版）  SCI 英文刊名： SCIENCE IN CHINA SERIES C (LIFE SCIENCES)  年，卷(期)： 2005 48(z2)  分類號(hào)： P5  關(guān)鍵詞： global N cycle   human Nr creation   N budgets   consquences of N cycle alteration  

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