地理科学进展 ›› 2005, Vol. 24 ›› Issue (6): 50-58.doi: 10.11820/dlkxjz.2005.06.006

• 生态环境 • 上一篇    下一篇

土壤N2O排放研究进展

刘杏认1,2, 董云社1, 齐玉春1   

  1. 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
  • 收稿日期:2005-07-01 修回日期:2005-09-01 出版日期:2005-11-25 发布日期:2005-11-25
  • 作者简介: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
  • 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

LIU Xingren1,2, DONG Yunshe1, QI Yuchun1   

  1. 1. Institute of Geographical Sciences and Natural Resources Research, CAS, Beijing 100101|
    2. Graduate School of the Chinese Academy of Sciences, Beijing 100039
  • Received:2005-07-01 Revised:2005-09-01 Online:2005-11-25 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。

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