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通过多年对稻田甲烷排放量的野外实验观测和对稻田甲烷产生与排放因子的研究，总结出减少稻田甲烷排放的主要方法，分析了各种减排方法的效果和经济效益，并利用层次分析法对各种减排方法做了综合的评价。现有的稻田甲烷减排方法主要有其它肥料代替传统的有机肥（植物秸秆、动物粪便）、种植低甲烷排放的水稻品种、灌水管理等。适合中国国情的方法主要有杂交稻替代常规稻，沼渣肥替代纯有机肥。沼渣肥替代有机肥的减排效果较好，社会效益和环境效益明显优于杂交稻替代常规稻，但杂交稻替代常规稻的经济效益很显著。
Through years of field experiments on methane emission in paddy fields and methane production and emission factors in paddy fields, the main methods to reduce methane emissions in paddy fields have been summed up. The effects and economic benefits of various emission reduction methods have been analyzed. Analytic hierarchy process Comprehensive evaluation of various emission reduction methods. The existing methods for methane emission reduction in paddy fields mainly include other fertilizers instead of traditional organic fertilizers (plant stalks, animal manure), rice varieties with low methane emission, and irrigation management. Suitable for China’s national conditions are hybrid rice instead of conventional rice, biogas residue instead of pure organic fertilizer. Biogas residue replacement organic fertilizer has better emission reduction effect, social benefits and environmental benefits are obviously better than hybrid rice instead of conventional rice, but the economic benefits of hybrid rice instead of conventional rice are significant.