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In order to explore greenhouse gas emission and soil mineral nitrogen characteristics of paddy field under different irrigation methods in northeast black soil region of China, three test treatments (controlled irrigation (KG), intermittent irrigation (JG) and wet irrigation (CI)) were set according to different irrigation methods, with local conventional transplanting and inundation (CK) as control. The processes of greenhouse gas methane (CH4) and nitrogen oxide (N2O) emissions, global warming potential, global warming potential based on yield and NH+4N and NO-3N contents in 0~60cm soil of paddy fields with different treatments were studied, as well as the correlation between soil temperature in 0~20cm soil layer and mineral nitrogen and CH4 and N2O emissions. The results showed that with the advancement of rice growth and development, the soil temperature of each layer of paddy soil in each treatment was increased first and then decreased. The emission of CH4 and N2O was increased at first and then decreased in reverse V-shaped trend. The emission peaks of CH4 and N2O appeared at jointing and booting stage and heading and flowering stage, respectively. In terms of time, inflection points of NH+4N content in paddy soils treated with CK, JG, CI and KG appeared at midtillering stage, heading and flowering stage, jointing and booting stage and milking stage respectively, while the maximum NO-3N content in all treatments occurred at early tillering stage. Spatially, the average content of NH+4N in paddy soils of different treatments was gradually decreased with the increase of soil depth, while the average content of NO-3N in CK treatment was gradually increased with the increase of soil depth, while the other treatments were decreased first and then increased. There was a significant correlation between soil temperature and CH4 emissions, but no significant correlation with N2O emissions. NH+4N in each treatment soil was positively correlated with CH4 and N2O emissions, while NO-3N in soil was negatively correlated with CH4 and N2O emissions. Cumulative emissions of CH4 from large to small in paddy fields were CK, JG, KG and CI, and accumulative emissions of N2O from large to small in turn were CI, KG, JG and CK. Cumulative emissions of CH4 and N2O from each treatment were significantly different from those of CK treatment (P<0.05). In terms of greenhouse effect per unit yield (GWPy), KG, JG and CI treatment were decreased by 24.98%, 27.69% and 24.06%, respectively compared with that of CK treatment. The research results can provide theoretical basis and technical support for reducing emission of paddy field and improving utilization rate of mineral nitrogen in soil in northeast black soil region of China.