| 不同植物群落对灰岩试块溶蚀速率的影响 |
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| 引用本文： | 吴孔运,蒋忠诚,叶晔.不同植物群落对灰岩试块溶蚀速率的影响[J].吉林大学学报(地球科学版),2007,37(5):967-971. |
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| 作者姓名： | 吴孔运 蒋忠诚 叶晔 |
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| 作者单位： | 1.中国地质科学院 岩溶地质研究所, 广西 桂林 541004;2.中国林业科学研究院 科技信息研究所, 北京 100091 |
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| 基金项目： | 国家自然科学基金项目(40372117) |
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| 摘 要： | 用澳大利亚产的微侵蚀计，对湖南郴州礼家洞3个植物群落土壤和泉水中的灰岩溶蚀速率进行了精确测定。对取得的1 650个数据，用SPSS应用软件进行处理，发现乔木群落泉水和土壤中灰岩的平均溶蚀速率最高，分别为3.17 mm/a和0.63 mm/a。在测定灰岩溶蚀速率的同时，对泉水的水化学特征和土壤中的TOC进行了分析，发现乔木群落样地的泉水有更强的溶蚀力（较低的方解石饱和指数和较高的CO2分压）。乔木群落土壤中的TOC比灌丛、草丛的多。与灌丛、草丛相比，乔木群落对CO2汇的贡献最大。
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| 关 键 词： | 植物群落 溶蚀速率 灰岩 CO2 TOC |
| 文章编号： | 1671-5888（2007）05-0967-05 |
| 收稿时间： | 2007-03-02 |
| 修稿时间： | 2007-03-02 |
Influence of Different Plant Communities On Erosion Rates of Limestone Rock Blocks |
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| WU Kong-yun,JIANG Zhong-cheng,YE Ye.Influence of Different Plant Communities On Erosion Rates of Limestone Rock Blocks[J].Journal of Jilin Unviersity:Earth Science Edition,2007,37(5):967-971. |
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| Authors: | WU Kong-yun JIANG Zhong-cheng YE Ye |
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| Institution: | 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 |
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| 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. |
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| Keywords: | plant community erosion rate limestone carbon dioxide sink TOC |
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