Journal of Ecology and Rural Environment ›› 2019, Vol. 35 ›› Issue (5): 554-562.doi: 10.19741/j.issn.1673-4831.2018.0051

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Research Development on Generation Mechanism and Related Models of N2O Emissions From Agricultural Soil

ZHANG Ya-jie, NIU Hai-shan   

  1. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2018-01-30 Online:2019-05-25 Published:2019-06-25


Nitrous oxide (N2O)is one of the major greenhouse gasses. In atmosphere,the concentration of N2O is increasing sharply. Agricultural soil is a major source of N2O emissions,accounted for approximately 70% of total global anthropogenic emissions. Nitrification,denitrification,nitrifier denitrification and dissimilatory nitrate reduction to ammonium are the main N2O generation processes. Based on clarifying of the N2O generation mechanisms,the development and research status of the process-based mechanism models[including denitrification-decomposition (DNDC),water and nitrogen management model (WNMM),DAYCENT and ecosystem model (Ecosys)]for N2O emissions from agricultural soil were reviewed and summarized. Some key issues that should be paid more attention in the future studies on the N2O emission simulation for agricultural soils,including the model mechanism improvement,parameter adjustment and enhancement of the regional simulation ability. Research on the cropland N2O generation mechanism and related models is meaningful to predict and mitigate the N2O emissions and maintain the ecological balance.

Key words: nitrous oxide, agricultural soil, generation mechanism, mechanism process model

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