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石灰岩在我国的分布相当广泛。由石灰岩所发育的土壤在不同成土条件下产生不同的特性。欲阐明此类土壤的特性,必须依靠细致的野外调查和精密的室内分析。广西是著名的喀斯特地区,石灰岩出露面占总面积的60%左右;云南东南部的石灰岩地区也占总面积的50%以上。对于这些地区的土壤发生、特性和利用等问题,已有不少研究,但在粘土矿物组成及其演变规律方面还缺乏资料,故由滇桂地区石灰岩发育的土壤中挑选少数土壤标本,分析其粘土矿物组成,借以阐明不同成土条件对石灰岩发育土壤的影响。
Limestone is widely distributed in our country. Soil developed from limestone produces different characteristics under different soil conditions. To clarify the characteristics of such soils, we must rely on careful field investigation and sophisticated in-house analysis. Guangxi is a famous karst area with limestone appearances accounting for about 60% of the total area. Limestone areas in southeastern Yunnan also account for more than 50% of the total area. Many studies have been done on the occurrence, characteristics and utilization of soils in these areas. However, there is still a lack of data on the composition and evolution of clay minerals. Therefore, a few soil samples were selected from the limestone-developed soils in Yunnan and Guangxi Provinces to analyze their Clay mineral composition, in order to clarify the different soil conditions on limestone soil development.