Abstract: In order to understand the effects of different straw returning approaches on the greenhouse gas annual emissions in a wheat-corn rotation farmland of Huang-Huai-Hai Region,the static chamber-gas chromatograph technique was used to investigate the annual changes of greenhouse gas (CO₂,N₂O and CH₄) emissions from Oct.2013 to Oct.2014.The experiment was with four treatments under the same watering and fertilizing conditions: no straw return,CK; straw return,CS; maize straw-rumen-cattle dung return,CGS; and straw -mushroom residue return,CMS.The results showed that different straw returning approaches affected the greenhouse gases emission intensity and annual cumulative emissions from the soil of the wheat-corn rotation farmland.In general,the soil under the wheat-corn rotation was the source for the CO₂ and N₂O,and was the sink for CH₄.Compared with CK,the annual cumulative emissions of CO₂ and N₂O increased with CS and CGS treatments,while decreased with CMS treatment; the annual cumulative absorptions of CH₄ decreased with CS,CGS and CMS treatments.Different straw returnings also affected the global warming potential of greenhouse gases (GWP); the GWP values in 20 a,100 a and 500 a were all respectively in the order of CGS > CS > CK > CMS,with significant differences among different treatments (P<0.05).Therefore,we recommended that the straw-mushroom residue return could be a reasonable way to alleviate the global warming potential of greenhouse gases from soil in Huang-Huai-Hai Region.