Abstract: Methane is one of the most important greenhouse gases, whose greenhouse effect is 298 times of CO₂. Wetland is the most important source of methane emission and the source and sink of nitrogen. Microorganisms are involved in the carbon and nitrogen biogeochemical cycling in wetlands. CH₄ is produced through anaerobic degradation of organic matter by microorganisms under anaerobic condition. CH₄ emission can be reduced by microorganisms through denitrifying anaerobic methane oxidation processes (DAMO) in wetlands, which plays an important role in alleviating global greenhouse effect. The mechanism of DAMO, characteristics and distribution of Methylomirabilis oxyfera, detection method and influencing factors of DAMO process are systematically introduced in this review. The discovery of more DAMO microorganisms and the study of DAMO process in paddy field are prospected in the future, to promote further research in this area and thus provide scientific basis for regulating CH₄ emission from paddy field soils.

Key words: irrigation, spring wheat cultivar, nitrogen, resource utilization efficiency, trade off.