C mineralization kinetics of soil after 360 days incubation at 25°C: cumulative CO₂-C, sizes of the labile and stable C pools, mineralization rate constants and mean residence times of the labile and the stable C pools.

CF: coniferous forest; EBF: evergreen broadleaf forest; BF: bamboo forest; CL: cropland; LS: lake sediment; Cm: cumulative mineralized C as percentage of initial C in the soil. Labile C: rapidly mineralizable C (calculated using a double exponential model); Stable C: slowly mineralizable C (calculated using a double exponential model); k1: mineralization rate constant of the labile C pool (double exponential model); k2: Mineralization rate constant of the stable C pool (double exponential model); MRT1: Mean residence times of the labile C pool (MRT1 = 1/k1); MRT2: Mean residence times of the stable C pool (MRT1 = 1/k2); r2: coefficient of determination of the double exponential model. Values are mean (n = 4).