Abstract: Seven and 11-year-old mixed Schima superba Gardn. et Champ. - Cyclobalanpsis glauca (Thunb.) Oerst. plantations (SC) transformed from shrub, and the reserved shrub were chosen to study their dynamic changes in carbon storage. The results showed that the carbon storage in the three types of vegetation and in the soils followed the ascending order of shrub < 7-year-old SC < 11-year-old SC. The vegetation carbon storage in 7 and 11-year-old SC had significant increment of 5.49 and 23.64 t·hm^-2, as compared with shrub (P<0.05). Vegetation carbon storage in 11-year-old SC was 18.15 t·hm^-2 larger than that in 7-year-old SC. Soil carbon storage in 7 and 11-year-old SC was 12.56 and 30.99 t·hm^-2, being much higher than that in shrub soil. Soil carbon storage in 11-year-old SC was 18.43 t·hm^-2 more than that in 7-year-old SC, with significant difference in each soil layer of 0-50 cm depth. The total ecosystem carbon storage of shrub, 7 and 11-year old SC was 54.11, 72.16 and 108.74 t·hm^-2, respectively. The annual increment of total carbon storage in 7 and 11yearold SC was 2.58 and 4.97 t·hm-2·a-1 compared with shrub, respectively. The carbon storage of evergreen broadleaved young plantations transformed from shrub has increased significantly; however, long-term effect of stand age on carbon accumulation needs to be further studied.

Key words: latitude gradient, ecological stoichiometry, soil., common herbaceous plant, precipitation