Effects of Temperature and Land Use Change on Soil Organic Carbon Mineralization

[Objective]The research aimed to study the effects of temperature and land use change on soil organic carbon mineralization.[Method] Soil samples collected from the Chinese fir plantation and paddy field were incubated aerobically at 15 ℃ and 25 ℃,and the mineralization of soil organic carbon was measured.[Result]The mineralization rates of soil organic carbon in the Chinese fir soil and paddy soil were generally the highest at the beginning of the incubation,and this was immediately followed by a steady and strong decrease after 112 days.Cumulative mineralized C significantly increased with the temperature increase(P0.05),and there were 157.8% and 135.8% increase in paddy soil and forest soil due to 10 ℃ increase of temperature.However,there was no significant difference of cumulative mineralized C between paddy soil and forest soil throughout the experimental period.[Conclusion]This study indicated that the temperature had a significant influence on the soil organic carbon mineralization,but the land use change didn't have remarkable influence.