img

Wechat

Adv search

Journal of Desert Research ›› 2023, Vol. 43 ›› Issue (2): 184-194.DOI: 10.7522/j.issn.1000-694X.2022.00082

Previous Articles    

A review of research progress on nitrous oxide emissions from desert soil and its driving factors

Chunming Xin1,2(), Mingzhu He1(), Chengyi Li1,2, Libin Zhang1,2, Xinrong Li1   

  1. 1.Shapotou Desert Research and Experiment Station,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2022-06-02 Revised:2022-07-19 Online:2023-03-20 Published:2023-04-12
  • Contact: Mingzhu He

Abstract:

Nitrous oxide (N2O) has the characteristics of long lifespan, high warming potential and great damage to the ozone layer. Terrestrial ecosystem is the main source of N2O. Global climate change lead to the change of temperature, rainfall and biological process in desert ecosystem, which will promote or inhibit N2O emissions and further influence of the environment. Therefore, this paper summarized the latest domestic and foreign researches on soil N2O emission in desert regions. We analyzed the production process and emission flux of N2O in desert soil, and further reviewed the effect of environmental factors and soil biological and abiotic factors on desert soil N2O emission. The soil N2O emission in desert ecosystems, dominated by nitrification and denitrification, has seasonal characteristics (high emissions in growing season and low emissions or absorb N2O in non-growing season). On the basis of the previous researches, some topics that need to be solved urgently in the research field about soil N2O emission are prospected at the end of this paper. The ideas and pathways solve these problems as follows: firstly, isotope tracer method and molecular biological technique should be used to explore the effects of soil micro-organisms and its related functional genes on N2O emissions and consumption in arid and semi-arid regions; secondly, investigate the patterns of N2O emissions in desert soils under the interaction of multiple factors at different time scales (daily, monthly, seasonal and interannual); thirdly, refine the N2O emission models in desert ecosystems and assess the impact of N2O emission on environmental change.

Key words: desert ecosystems, climate change, nitrification/denitrification, emission flux, functional genes

CLC Number: