title: [Relationships between initial chemical composition of forest leaf litters and their decomposition rates in degraded red soil hilly region of Southern China].
abstract: A pot experiment with litter bags was conducted to study the relationships between the initial chemical composition of 8 kind forest leaf litters and 4 kind mixed leaf litters and their decomposition rates in degraded red soil hilly region of Southern China. Comparing with needle-leaf litters, broad-leaf litters had significantly higher contents of N, P, K, and Mg, but significantly lower contents of lignin and C. The decomposition rates of test litters were significantly positively correlated with the litters initial contents of N, P, K, and Mg (P < 0.05), and negatively correlated with the initial contents of lignin and C as well as the lignin/N, lignin/P, and C/P ratios (P < 0. 05). The lignin content explained 54.3% of the variation in litter decomposition rates, being the key affecting factor. Litters C, N, and P contents also had close correlations with the decomposition rates, and together with lignin content, contributed 81.4% of the variation. It was suggested that in the process of vegetation restoration in degraded red soil hilly region of Southern China, introducing broad-leaf trees with lower lignin and higher N and P contents would benefit the acceleration of forest litters decomposition and the restoration of soil fertility.
authors.affiliation: State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. cfl224@163.com
authors.forename: Fa-lin
authors.initials: FL
authors.lastname: Chen
authors.forename: Bo
authors.initials: B
authors.lastname: Jiang
authors.forename: Kai
authors.initials: K
authors.lastname: Zhang
authors.forename: Hua
authors.initials: H
authors.lastname: Zheng
authors.forename: Yi
authors.initials: Y
authors.lastname: Xiao
authors.forename: Zhi-yun
authors.initials: ZY
authors.lastname: Ouyang
authors.forename: Nai-mei
authors.initials: NM
authors.lastname: Tu
mesh_terms: D002681:China; D017753:Ecosystem; D019015:Geologic Sediments / Q000737:chemistry; D009584:Nitrogen / Q000032:analysis*; D010758:Phosphorus / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D012987:Soil / Q000032:analysis / Q000737:chemistry; D014197:Trees / Q000737:chemistry* / Q000254:growth & development
chemical_list: D012987:Soil; D010758:Phosphorus; D009584:Nitrogen