Journal of Ecology and Rural Environment ›› 2021, Vol. 37 ›› Issue (1): 10-18.doi: 10.19741/j.issn.1673-4831.2019.0752

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Research Progress on N2O Emissions from Ditches

ZHANG Feng-su1,2,3, WANG Xiao-guo1,2,3   

  1. 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Key Laboratory of Mountain Surface Process and Ecological Regulation, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2019-09-21 Published:2021-01-22

Abstract: The ditch, as a special wetland ecosystem, has high redox capacity and greenhouse gas emission potential. Its prominent feature is frequent wetting-drying alternations and also greatly disturbed by human activities. The ditch wetlands is an important source of nitrous oxide (N2O), while N2O emissions from ditch wetlands are regulated by various physical and chemical factors, such as hydrological characteristics, vegetation species and loadings of exogenous nutrients. Here the available studies on the quantification approach of N2O emissions from ditch wetlands done in China and worldwide were synthesized, thereby comparing the N2O fluxes from rural sewage ditches and agricultural ditches in different regions. Furthermore, the spatial-temporal variations in N2O emissions from ditch wetlands are analyzed and the key regulators underlying are explored. Overall, further studies are needed to well understand N2O emissions and the regulators in ditch systems, in particular, investigations on capacity of nitrification-denitrification in ditch wetlands should be strengthened, for the environmental friendly management practices on ditches.

Key words: ditch, N2O emission, influencing factor

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