影响贵州省喀斯特山区石漠化的自然因素分析

目的]分析影响贵州省喀斯特地区石漠化的自然因素,为石漠化的调控与治理提供参考。方法]参考前人的研究结果,野外考察并实地取样,分析影响石漠化的自然因素。结果]不同碳酸盐岩上石漠化程度不同,石漠化发生率为：连续性灰岩〉其他岩性、白云岩夹碎屑岩〉白云岩组合、白云岩夹碎屑岩和白云岩夹碎屑岩的互层〉纯白云岩。石漠化的发生率基本随坡度的增大而增大。植被覆盖越高,越易有效遏制石漠化的进程。不同植被类型其土壤含水量不同,林地土壤的单位重量或单位体积平均含水率〉草坡〉灌丛,草坡、灌丛较林地易发生石漠化。土壤含水量与土层厚度总体呈正相关,且随着时间的推移土壤含水量的降低幅度随土层厚度增加而减小。此外全省范围内的大雨、暴雨为石漠化形成提供了强大的动能。结论]碳酸盐岩的岩性、坡度、植被、土层厚度、降水等因素是影响石漠化的自然因素。

Analysis of Nature Factors Impacting Rock Desertification in Karst Area of Guizhou Province

Objective] The aim was to analyze nature factors impacting rock desertification in karst area of Guizhou Province and provide reference for controlling rock desertification.Method] The nature factors impacting rock desertification were analyzed based on previous results,field investigation and sampling.Result] The extent of rock desertification was different in different carbonate rock area and the results were that the occurrence ratio of rock desertification of continuous limestone was larger than othe...