中国岩溶2012，Vol.31Issue(4)：423-425,3.
滇东喀斯特地区石漠化裸露红土的表层有机质含量分析
Organic matter content of the bare lateritic surface-layer in east Yunnan karst rocky deserts
摘要
Abstract
The bare laterite is a special desert landscape discovered in east Yunnan in the recent years. In order to understand the reason for the exposure of the laterite, the organic matter contents in the samples from laterites with and without vegetation cover are analyzed. The samples are collected in typical karst rocky deserts in Fuyuan, Xuanwei, Luoping counties. It turns out that the organic matter content of the bare lateritic surface-layer, averaging in 1. 31 %, is among 0.06 % ～3. 85 %. This value is lower than that with vegetation cover in the same area and that of other kind of soil samples in southwest China karst region. In the process of rocky desertification, there is large amount of loss in the organic matter from the soil because of the vegetation deterioration. Correspondingly, the soil structure and the preserving ability of moisture and fertility are affected, which brings the exposure of the laterite. Patches of bare laterite may represent a transition stage in rocky desertification. In this stage, there is vegetation degradation and the soil hasn't been completely eroded yet.关键词
石漠化/红土/裸露/有机质/滇东喀斯特地区Key words
rocky desertification/ laterite/ bareness/ organic matter/ the karst area of eastern Yunnan分类
农业科技引用本文复制引用
陈虎,王嘉学,胡灿灿,马照伦..滇东喀斯特地区石漠化裸露红土的表层有机质含量分析[J].中国岩溶,2012,31(4):423-425,3.基金项目
国家自然科学基金(41061021) （41061021）
云南省自然科学基金(2009ZC065M) （2009ZC065M）
云南省大学生创新性实验计划(CX05) （CX05）
