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国际上在土壤分类中已把变性土列为独立的土纲。80年代以来,我国也陆续发现变性土分布。变性土最重要的诊断特征是:其剖面下层有紧挨相交的滑擦面,它是分析变性土特性和形成过程的重要证据,但迄今尚未见对滑擦面研究的专门的文献报道。本文以发现于我国云南省元谋干热河谷的干润变性土为研究对象,研究其滑擦面的特征与形成机制。 1 材料和方法 土壤样品采自云南省元谋县老城乡丙间村,分别取于普通变性土和表蚀变性土剖面下层的滑擦面层。前者采自35cm以下,后者采自25cm以下土层。采样区的自然环境条件及土壤分类和性状见文献[2]。
In the world, soil is classified as an independent soil class. Since the 1980s, China has also gradually discovered the distribution of denatured soil. The most important diagnostic features of denudated soil are that there is a smooth sliding surface in the lower layer of the section, which is an important evidence for analyzing the characteristics and formation process of the denudation soil. However, no special literature has been reported on the study of the sliding surface. In this paper, dry-denaturalized soil found in the dry and hot valley of Yuanmou in Yunnan Province of China was studied to study the characteristics and formation mechanism of its sliding surface. MATERIALS AND METHODS Soil samples were collected from the village of Mendou, Laocheng Township, Yuanmou County, Yunnan Province. The soil samples were taken from the slippery surface of the normal denuded soil and the lower surface of the denuded alteration soil. The former was taken from 35cm below, the latter from 25cm below the soil. Sampling area of natural environmental conditions and soil classification and traits in the literature [2].