For holistic control of reactive N: Regional, national and global perspectives

Reactive N is closely related to the global issues of climate change and regional pollutions. Nitrous oxide (N2O), the fourth important gas among greenhouse gases, is produced as an intermediate in nitrification and denitrification processes. As methane (CH4) is the end product in the anoxic decomposition of organic materials, mitigation options of N2O emission are different from those of CH4 emission. Nitrate is another reactive N bringing about the eutrification of aqueous environments and the hazard of drinking water. Mitigation of NO3 problem also relates closely to the N2O emission. Therefore, holistic approaches are necessary for solving the problems of Earth warming and environmental eutrification by reactive N at the same time. In this paper, the deforestation in the tropics, and the present situations of food supply and sustainable agriculture in Japan are re-evaluated in terms of N2O emission and NO3 discharge from the agricultural sector. The magnitude of N2O emission by deforestation in the tropics may fall within the similar order of magnitude by N fertilization. As more N is imported as foods and fodder than the amount of fertilized N in Japan, more attention should be paid to the phases of their consumption and waste treatment. Sole attention to the production stage is not enough for the total mitigation of various environmental problems by reactive N in relation to agriculture. Parameters holistically evaluating the impact of reactive N on the Earth and respective regions are urgently necessary.

作 者： Makoto Kimura   作者單位： Laboratory of Bioresource Functions(Soil Biology and Chemistry), Department of Biological Mechanisms and Functions, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan  刊 名： 中國科學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： P5  關鍵詞： holistic control of reactive N   regional   national and global scales  

【For holistic control of reactive N: 】相關文章：

英語作文:Population control 人口控制05-16

試論沒有N的N的結構和功能04-26

SEFIDROOD RIVER SUB-WATERSHED-DAM-ESTUARY AND DEGRADATION MODEL: A HOLISTIC APPROACH IN IRAN04-27

N,N,N,N-四丁基丙二酰胺從硝酸鹽介質中萃取鈰(Ⅲ)04-26

Urban flood control strategy based on new relationship of human and flood04-26

Study on Control Strategy of Sulfur Dioxide Concentration in the Urban Area of Shijiazhuang04-27

Relation of Mineralizable N to Organic N Components in Dark Loessial Soils04-27

學科術語 N05-04

p(α,α′)πN反應中N*(1440)激發的蒙卡模擬04-26

Rapid Optimal Generation Algorithm for Terrain Following Trajectory Based on Optimal Control04-27