【Objective】 This study analyzed effects of different fertilization treatments on N_2O and CH_4 emissions from rice in wheat stubble field in Jianghuai area and calculated the global warming potentials (GWPs) and greenhouse gas intensities (GHGI) combined with rice yields under straw returning application. 【Method】 The split plot design was adopted with a total of 8 treatments. Two main treatments consisted of straw application (S) and straw removal (NS) and four sub-treatments included no nitrogen fertilizer (CK),traditional fertilization (T0),black carbon and urea(Tl) and ammonium sulfate (T2). The N_2O and CH_4 emission fluxes were monitored with a static chamber and gas chromatography method. The soil temperature, humidity, inorganic nitrogen contents and rice yields under different fertilization treatments were measured and GWPs and GHGI were calculated.【Result】N_2O and CH_4 emissions peaked after basal and topdressing application under all treatments expect CK regardless straw returning application. Compared to traditional treatments,the addition of biochar and ammonium sulfate effectively reduced N_2O and CH_4 emissions. Compared to T0,the addition of biochar significantly decreased rice yield and increased soil NO_3~- content and risk of NO_3 pollution to surrounding water regardless straw returning. Compared to T0, ammonium sulfate significantly increased rice yield by 12.27 % without straw returning and 7.78 % with straw returning. Compared with straw removal, ammonium sulfate addition under straw application promoted N_2O emission but significantly reduced CH_4 emission, GWPs and GHGI.【Conclusion】 With the increase of CH_4 emissions due to returning straw to paddy field, substitution of urea by ammonium sulfate was the best for reducing CH_4 emissions and GHGI,while increasing yield.