Changes of soil microbial communities and activities along a vegetation succession in karst soil: A case study of Stone Forest, Yunnan, China
Received date: 2009-01-27
Revised date: 2009-06-03
Online published: 2010-02-20
The process and mechanism of soil quality change along vegetation succession in degraded karst regions has been the research focus of soil science and ecology in China for the last 10 years. Topsoil samples were collected from selected eco-tesserae along a vegetation succession in Stone Forest, Yunnan, China. Soil nutrient pools of organic carbon and total nitrogen and those parameters of biological activity such as microbial biomass carbon, BR, PR, and qCO2 increased and evidenced the changes in soil function for ecosystem health along the vegetation succession. Bacterial community structures measured by molecular method (PCR-DGGE), as molecular footprint, traced sensitively soil quality and health changes caused by vegetation succession. These results demonstrated that, compared to bare land, vegetation restoration has not only enlarged soil nutrient pool, but also enhanced soil microbial biomass, diversity and activity, leading to a soil ecosystem with higher productivity and stability. In general, compared to cypress plantation, natural restoration (grassland and shrub) was an effective approach to improving soil quality indicated by soil biochemical properties. It was interesting that rate of soil quality recovery was faster at the early stage of vegetation restoring (thin grassland layer from bare land ), which meant good basal soil conditions built up for degraded karst ecosystem further restoration.
ZHANG Ping-jiu, PAN Gen-xing . Changes of soil microbial communities and activities along a vegetation succession in karst soil: A case study of Stone Forest, Yunnan, China[J]. GEOGRAPHICAL RESEARCH, 2010 , 29(2) : 223 -234 . DOI: 10.11821/yj2010020005
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