Based on experiments with four agricultural management practices,CO2,CH4 and N2O fluxes during wheat growing seasons in the North China Plain were monitored using the static chamber method and the gas chromatographic technique.Total greenhouse gas emissions and GWP were estimated accordingly.The results indicated that the wheat field was the sources of CO2 and N2O,but the sink of CH4.Compared with the nostraw returning(SN),straw returning(SR)significantly enhanced the emission of CO2,N2O and the absorption of CH4 by 7.9%,48.6%,16.2%,respectively.Using new type fertilizer(SRC)or nitrogen drilling(SRR)enhanced the absorption of CH4 by 9.3%~44.2%,but decreased the emission of N2O by 22.4%~35.5%.SRR offset the increase emission of N2O caused by straw returning.The wheat field under four management practices was the absorption sink for the atmospheric greenhouse gases.Using new type fertilizer or nitrogen drilling under the base of straw returning could be helpful for greenhouse gas mitigation and the increase of wheat yield and efficiency.