土壤N2O排放研究进展

doi:10.11820/dlkxjz.2005.06.006

摘要/Abstract

摘要：

N2O不仅是一种重要的温室气体，而且还可以破坏臭氧层。随着人类活动的增加，其在大气中的浓度不断上升，对环境的影响也更加严重，因此，N2O的排放日益成为环境研究的热点问题。土壤是N2O的重要排放源。本文综合分析了土壤N2O排放研究的进展情况，主要包括：土壤N2O产生及排放的机理；影响N2O排放的主要因素；土壤N2O排放的时空特征以及全球N2O排放的模型估计；最后提出了今后的研究方向。

关键词: N2O, 反硝化作用, 排放, 土壤, 硝化作用

Abstract:

Nitrous oxide is one of the most important greenhouse gases, which is 200 times more potent than carbon dioxide. Apart from being a greenhouse gas, it can also deplete the stratospheric ozone, exposing humanity to the harmful effects of solar ultra-violet radiation. Nitrous oxide in atmosphere has been increasing continuously due to human activity and it will influence the environment severely, so study on the emission of nitrous oxide is more and more important. Soil is the main source of nitrous oxide. In this paper, the authors give an overview on the mechanism and the key influencing factors of production and emission of nitrous oxide. The temporal and spatial characteristics of the emission of nitrous oxide and its modeling simulation are also studied. Nitrous oxide is mainly produced by the action of nitrification and de-nitrification in soil. The processes of nitrous oxide production and emission is very complex, and the key influencing factors include soil temperature, soil water content, soil pH, soil texture and agriculture management. Finally, some suggestions are put forward for further investigation in the near future. It is recommended that further study be focused on quantitative description between nitrous oxide and these factors, on the estimation of emission amount at global level, and on development of methods of reducing nitrous oxide emission in the future.

Key words: de-nitrification, emission, nitrification, nitrous oxide, soil

刘杏认, 董云社,齐玉春. 土壤N2O排放研究进展[J]. 地理科学进展, 2005, 24(6): 50-58.

LIU Xingren,DONG Yunshe, QI Yuchun. Research Progresses in Nitrous Oxide Emission from Soil[J]. PROGRESS IN GEOGRAPHY, 2005, 24(6): 50-58.

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