| In order to reveal the influence of green manure on soil organic carbon (SOC) mineralization in the context of global warming, soils with three green manures of Changwu Soyean (S), Ryegrass (R), the combination of them (M), and a control without green manure (CK) were incubated at 5℃, 15℃, and 25℃ for 79 d. The SOC mineralization as indicated by CO2 emission was measured dynamically and modeled by using a first\|order kinetic model. Soil CO2 emissions was significant for green manure species, incubation temperature, and their interaction. The SOC mineralization rate peaked at 2 d after the incubation and then decreased rapidly and stabilized after 17 d and 22 d when incubated at 15℃ and 25℃, respectively. However, the mineralization rate peaked at 8 d after incubation and decreased and stabilized after 42 d when incubated at 5 ℃. The mean mineralization rate and cumulative SOC mineralization increased with increasing temperature. Compared to CK, treatments S, M, and R increased the cumulative mineralization by 10.5~11.6 times with a trend of S>M>R (P<0.05), which was in consistent to the soil C and N contents in them. The temperature sensitivities (Q10) of SOC mineralization decreased by 11.0%, 11.2%, and 11.8% with S, M, and R than CK, respectively. Both green manure addition and increasing of incubation temperature improved the parameters of SOC mineralization kinetics model, especially for t that with S. Compared to CK, treatments S, M, and R increased soil carbon and nitrogen contents by 36.0%~46.2% and 39.3%~47.4%, respectively. Overall, green manure addition, especially, legumes, could stimulate SOC mineralization and improve soil nutrient cycling in dryland cropping systems. |