Relationship of soil surface CO_2 flux with microbial biomass carbon in the karst areas of Southwest China  

作　　者：PIAO Hechun, HONG Yetang and YUAN Zhiyun State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 

出　　处：《Chinese Science Bulletin》1999年第S2期122-123,共2页

摘　　要：THE production of C0₂ in the soil results from the oxidation of soil organic matter by heterotrophic microorganisms and by the respiration of plant roots. The release of C0₂ from the soil is a major flux in theglobal carbon cycle, which is largely fuelled by plant production. In this note, we investigated the release of C0₂from soils of the karst region. We measured the amount of soil microbial biomass carbon,soluble organic carbon in the soil, and the flux of C0₂ from the soil surface over a 1-year period. Thisnote is to examine the factors affecting the flux of C0₂ from the soil surface in an ecosystem with nutrientpoor soils and limited amounts of soil microbial biomass. This study was conducted from June 1997 through May 1998 on a hill side, located in the suburbs ofGuiyang City in Guizhou Province of China （latitude 26°30’N, longitude 106°39’E）. Situated 1

关 键 词：SOIL CARBON dioxide KARST areas. 

分 类 号：P534[天文地球—古生物学与地层学]