应用生态学报2009，Vol.20Issue(7)：1586-1590,5.
表层岩溶动力系统中土壤水分及其岩溶效应
Soil water and its karst effect in epikarst dynamic system
摘要
Abstract
This paper studied the soil physical properties, soil CO2, soil water and spring water chemistry in a mature forest and a shrub in Nongla of Guangxi, China, as well as the relationships between the chemistry of soil water and spring water, aimed to understand the karst effect of the soil water in Nongla epikarst dynamic system. Significant differences were observed in the soil bulk density and non-capillary porosity under forest and shrub, which affected soil water content. The fixed CO2 in soil water had a significant negative correlation with soil CO2, and the free CO2 in soil water was 0 mg·m-3 in the forest and 5.33×103mg·m-3 in the shrub. In soil water and spring water, there was a negative correlation between pH and Ca2+, Mg2+, and Cl- concentrations, and a positive correlation between K+, Na+, and HCO3- concentrations and organic C content. After the eluviation of rain water, the ion concentrations in leached soil water increased greatly, and accordingly, its corrosion ability enhanced greatly. The karst process in forest environment was stable and intensive, while that in shrub environment was active but weak.关键词
表层岩溶动力系统/土壤水/表层岩溶泉/岩溶效应Key words
epikarst dynamic system/ soil water/ epikarst spring/ karst effect.分类
生物科学引用本文复制引用
邓艳,覃星铭,蒋忠诚,罗为群,祁晓凡..表层岩溶动力系统中土壤水分及其岩溶效应[J].应用生态学报,2009,20(7):1586-1590,5.基金项目
国家自然科学基金项目(40572151)、国家"十一五"科技支撑计划项目(2006BAC01A10)和中国地质科学院岩溶地质研究所所控项目(200708,2008009)资助. （40572151）
