Soil samples from four land use types including forest

shrub

cultivated land and orchard were collected to investigate the soil organic carbon(SOC)storage

decomposition rates and the accumulation rate of degraded SOC in the karst area of Maocun village

Guilin City.The results show that the contents of SOC varied under different land use.The SOC contents of different land use in descending orders are forest

shrub

cultivated land

and orchard for 0—20cm soil layer

forest

cultivated land

shrub

and orchard for 20—40cm soil layer

and cultivated land

shrub

and orchard for 40—60cm soil layer

respectively.The results of the comparative incubation experiment show that the SOC decomposition and accumulation rates in descending order were forest

shrub

cultivated land

and orchard.