Relationships Between Biomass and Carbon Storage of Litter and Fine Root in Subtropical Typical Forests

The decomposition and turnover of fine root and litter, which were the two key processes for modeling and forecasting soil carbon sequestration in forest ecosystem. In order to understand the differences and interactions between biomass and carbon storage of fine root and litter, a fieldbased study in 110 plots of evergreen broadleaf forest, including Cunninghamia lanceolata plantation, Pinus massoniana plantation and Phyllostachys edulis plantation was conducted. The results showed that the highest litter biomass was in Cunninghamia lanceolata plantation, at (4415 ± 039)t/hm2, while the lowest was in Phyllostachys edulis plantation, at (2918 ± 031)t/hm2, and the significant difference was found between Phyllostachys edulis plantation and other three forests; the litter carbon storage of Phyllostachys edulis plantation was the lowest, at (1176 ± 0260) t/hm2, and it was significantly lower than other forests, while the highest carbon storage of litter was found in evergreen broadleaf forest at (1725 ± 016)t/hm2; the biomass and carbon storage of fine root among the four types of forests were significantly different. Moreover, the dead and alive fine root biomass had obvious dissimilarity in different layers of same type of forest or plantation; according to the fine root ratios of dead/alive, the turnover rates of fine root in evergreen broadleaf forests was faster than that in coniferous forests (Cunninghamia lanceolata and Pinus massoniana plantation).