CO2 effluxes rate was monitored using an infrared gas exchange analyzer(Licor-8100) from May to October.Simultaneously,soil temperature and moisture were also recorded.The results showed that the diurnal fluctuation of CO2 effluxes appeared a single peak.The relationship between soil respiration rate(y) and the variable of soil temperature(t) and soil moisture(w) at 10 cm soil depth could be described by the following exponential equation:y=0.3614e0.1219x(R2=0.702 0,P<0.05)and y=0.9303e0.0812x(R2=0.816 4,P<...