生态环境

土壤N2O排放研究进展

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  • 1. 中国科学院地理科学与资源研究所, 北京 100101|
    2. 中国科学院研究生院,北京 100039
刘杏认(1976-),女,博士生,主要从事环境生物地球化学方面的研究。Email:liuxr.04b@igsnrr.ac.cn

收稿日期: 2005-07-01

  修回日期: 2005-09-01

  网络出版日期: 2005-11-25

基金资助

中国科学院知识创新重大项目(KZCXI-SW-01-04)、中国科学院地理科学与资源研究所知识创新项目(CXIOG-E01-03-01)、国家重点基础研究发展规划项目(2002CB412503)资助。

Research Progresses in Nitrous Oxide Emission from Soil

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  • 1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101|
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039

Received date: 2005-07-01

  Revised date: 2005-09-01

  Online published: 2005-11-25

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。

本文引用格式

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 . DOI: 10.11820/dlkxjz.2005.06.006

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.

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