[Objective]An incubation experiment in laboratory was conducted to examine the effects of the carbon(C)and phosphorus(P)additions on carbon dioxide(CO_2)and nitrous oxide(N_2O)emissions from the soil sampled on Qinghai-Tibetan Plateau.[Method]Four treatments were adopted in this study, included the control(CK)and three treatments of additions(carbon,phosphorus,carbon and phosphorus).[Result]The carbon added individually or carbon,phosphorus add together significantly increased soil microorganisms C(MBC)and N (MBN)content,but the phosphorus added individually was not significant. Carbon added individually or carbon,phosphorus add together were significantly increased the alpine meadow soil CO_2 and N_2O,but the phosphorus added individually was not significant.Data analysis revealed a significant positive correlation between the cumulative CO_2 emissions and the soil DOC concentration.Soil N_2O production was mainly controlled by denitrification.[Conclusion]The variation of global warming potential(GWP)of CO_2 and N_2O for the carbon(C)and phosphorus(P)addition was:CP>C>P>CK.