This paper investigated characteristics of soil organic carbon and 3 kinds of labile carbon: microbial biomass carbon,water-soluble organic carbon and readily oxidation carbon under six kinds of land use types(including Quercus semicarpifolia secondary forest,Robinia pseudoacacia plantation,shrubbery,shrub,economic forest and farmland) at forest-drought valley ecotone in the upper reaches of Minjiang River.The results showed: Respective content of soil organic carbon and three kinds of labile organic carbon...