Abstract: Comparison was done on three slopes of conventional and prescribed burning forest of humus layer thickness,load and organic carbon storage of upper,middle and bottom slope,and 0~60cm levels soil organic carbon content and storage. This paper elaborated the impacts of slope positions on soil organic carbon storage in prescribed burning of Pinus Kesiya.The experimental data showed that after prescribed burning,humus layer,load and organic carbon storage of three slope increased obviously (P<0.05),which increased 0.55cm,2.317t/hm² and 1.479t/hm². 0~60cm level soil average organic carbon content and storage in the same slope position increased highly and significantly (P<0.01). The increase amplitude was bottom slope> middle slope> upper slope with increase rate being 0.581,0.505,0.482,and 44.218,41.696,32.492t/hm².The experimental data showed that prescribed burning can increase forest soil organic carbon storage,selected bottom and middle slope prescribed burning can obtain better efficiency of carbon sequestration.

Key words: slope positions, prescribed burning, organic carbon content, organic carbon storage