title: [Characteristics of soil organic carbon and microbial biomass carbon in hilly red soil region].
abstract: In this paper, 535 soil samples (0 to approximately 20 cm) were taken from the woodland, orchard, upland, and paddy field in the hilly red soil region of south China, and the quantitative characteristics of soil organic carbon (SOC) and soil microbial biomass carbon (SMB-C) were studied. The results showed that SOC content was the highest (16.0 g x kg(-1)) in paddy field and the lowest (8.4 g x kg(-1)) in woodland, while SMB-C content was the highest in paddy field (830 mg x kg(-1)) and the lowest in orchard (200 mg x kg(-1)). There was a highly significant positive correlation (P < 0.01) between the contents of SOC and SMB-C in the four land-use types. It was suggested that the changes of SMB-C content could sensitively indicate the dynamics of SOC. The transition from woodland to orchard or cultivated land in hilly red soil region would not decrease the SOC content.
authors.affiliation: Key Laboratory of Subtropical Agro-Ecology, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China. tangguoy@mails.gscas.ac.cn
authors.forename: Guoyon
authors.initials: G
authors.lastname: Tang
authors.forename: Daoyou
authors.initials: D
authors.lastname: Huang
authors.forename: Chengli
authors.initials: C
authors.lastname: Tong
authors.forename: Wenju
authors.initials: W
authors.lastname: Zhang
authors.forename: Heai
authors.initials: H
authors.lastname: Xiao
authors.forename: Yirong
authors.initials: Y
authors.lastname: Su
authors.forename: Jinshui
authors.initials: J
authors.lastname: Wu
mesh_terms: D002244:Carbon / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis*; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology
chemical_list: D009930:Organic Chemicals; D012987:Soil; D002244:Carbon