The dynamic of carbon stock and carbon sequestration in Chinese fir plantation at 10-year-old and 14- year-old were researched in Hultong, Hunan Province. The carbon stock of Chinese fir plantation ecosystem was mainly consisted of three sections, that was the trees, the litter and the soil, and the order of whose carbon stock could be ranked as follow., the soil〉the trees〉the litter. Carbon stock of Chinese fir plantation was 120.52 t . hm^-2 at the 10-year-old and 171.40 t. hm^-2 at the 14-year-old,with characteristics of age stage and zone...