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Influence of Different Plant Communities On Erosion Rates of Limestone Rock Blocks

WU Kong-yun1,JIANG Zhong-cheng1,YE Ye2   

  1. 1.Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin,Guangxi 541004,China;2.Institute of Science and Technology Information, Chinese Academy of Forestry, Beijing 100091,China
  • Received:2007-03-02 Revised:1900-01-01 Online:2007-09-26 Published:2007-09-26
  • Contact: WU Kong-yun

Abstract: Erosion rates of limestone rock blocks in spring soil of three plant communities at Lijiadong, Chenzhou, Hunan Province were measured with microerosion meter made in Australia. After processing 1 650 erosion rate data with SPSS statistical software, it was believed that the average erosion rate of limestone rock blocks in spring water and soil of arbor community were very high with being 3.17 mm/a and 0.63 mm/a. When measuring erosion rates of limestone rock blocks, hydrochemical characteristics of fluids and TOC of soil were analyzed. Results showed that the erosion capacity of fluids in arbor community was stronger (the lower saturation index of calcite and the higher pCO2) and the content of TOC in arbor community is higher than that in shrub and herb community. Arbor community had more contribution to the sink of atmospheric carbon dioxide than shrubs and herbs.

Key words: plant community, erosion rate, limestone, carbon dioxide sink, TOC

CLC Number: 

  • P642.25
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