Chemical Characteristics of Soil Percolating Water and Influencing Factors in Karst Stony Desertification Area

CHEN Sheng-hua; WANG Shi-jie; YANG Tao; XIAO De-an

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Chemical Characteristics of Soil Percolating Water and Influencing Factors in Karst Stony Desertification Area

- Chemical Characteristics of Soil Percolating Water and Influencing Factors in Karst Stony Desertification Area
- Bulletin of Soiland Water Conservation Vol. 30, Issue 6, Pages: 26-31(2011)
- 作者机构：
  
  1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵州,贵阳,550002
  2. 中国科学院普定喀斯特生态与石漠化试验研究站，贵州普定,562100
  3. 中国科学院研究生院,北京,100049
  4. 贵州省环境监测中心站,贵州,贵阳,550002
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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CHEN Sheng-hua, WANG Shi-jie, YANG Tao, et al. Chemical Characteristics of Soil Percolating Water and Influencing Factors in Karst Stony Desertification Area[J]. Bulletin of Soiland Water Conservation, 2011, 30(6): 26-31.
DOI：

CHEN Sheng-hua, WANG Shi-jie, YANG Tao, et al. Chemical Characteristics of Soil Percolating Water and Influencing Factors in Karst Stony Desertification Area[J]. Bulletin of Soiland Water Conservation, 2011, 30(6): 26-31. DOI：

摘要

对贵州省清镇王家寨喀斯特小流域9个样地的土壤渗滤水进行了系统监测。结果表明

随着石漠化退化程度的加剧

黑色石灰土地区土壤渗滤水中的HCO

方解石饱和指数(SI

)和黄壤地区土壤渗滤水中的Mg

离子浓度均呈升高趋势。初步认为

植被和土壤的双重退化是控制石漠化发育过程中渗滤水化学组成的主要原因

当植被系统的退化先于土壤系统时

水-土反应强度的影响更大

渗滤水化学组成表现为HCO

和Ca

含量随石漠化的发育而减少;当土壤系统的退化先于植被系统时

水-土反应时间的影响更大

渗滤水的化学组成则表现为HCO

和Ca

含量随石漠化的发育而增加。

Abstract

A systematically monitoring has been carried of soil percolating water in karst stony desertification area.The result showed that higher the degree of stony desertification is

the higher the concentrations of HCO-3

Ca2+ and the value of calcite saturation index(SIC) in the percolating water from rendzina area are.The concentrations of Mg2+ in water samples from yellow soil area showed the same trend.It maybe result from related soil and vegetation degradation.When vegetation degradation starts earlier than soil

the concentrations of HCO-3

Ca2+ will decrease with the development of stony desertification due to the stronger reactions between water and soil.On the contrary

when soil degradation starts earlier than vegetation

the concentrations of HCO-3

Ca2+ will increase with the development of stony desertification due to more time requirement for reactions between water and soil.

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