Nitrous oxide(N2O)is one of the main greenhouse gases,and cropland is an important source of anthropogenic N2O emissions.Exploring reasonable measures to mitigate N2O emissions in cropland is a major issue that urgently needs to be addressed.The reduction of N2O to N2 during denitrification is currently the only known biological pathway of N2O sink.The use of microbial communities capable of reducing N2O is a potential pathway to mitigate N2O emissions from cropland.Research on nosZ gene catalyzing N2O reduction has shown that there are two genotypes of N2O reducing bacteria.This paper mainly reviews the different phylogenetic and physiological characteristics of two types of N2O reducing bacteria,as well as the enzymatic kinetics of N2O reduction.In comparison,N2O reducing bacteria carrying nosZ Ⅱ exhibit stronger environmental adaptability,making them a competitive potential microbial community for cropland N2O sink.
N2O emissions from soilmeasures on mitigating N2O emissions from croplandN2O reducing bacterianosZ ⅠnosZ Ⅱ
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