This study determined the effects of the combined use of nitrogen fertilizer and organic manure on the greenhouse gas emissions, cumulative emissions, emission intensity(GHGI), and global warming potential(GWP)of early rice fields. The greenhouse gas produced through different treatments, including conventional chemical fertilizer and the combination of chemical fertilizer and organic manure [pig manure(PF), biogas slurry(BF), pig manure composting(DF), and green manure(GF)], was collected by closed static chamber method in the long-Term fertil...