干旱区生态环境知识资源中心(Arid): 滇东喀斯特地区石漠化裸露红土的表层有机质含量分析

Arid

	滇东喀斯特地区石漠化裸露红土的表层有机质含量分析
其他题名	Organic matter content of the bare Iateritic surface-layer in east Yunnan karst rocky deserts
	陈虎; 王嘉学; 胡灿灿; 马照伦
来源期刊	中国岩溶
ISSN	1001-4810
出版年	2012
卷号	31 期号:4 页码:423-425
中文摘要	滇东石漠化地区裸露红土是近年来关注的一种特殊的类荒漠化景观。为了解红土棵露原因,在富源县、宣威市、罗平县等地石漠化裸露红土典型发育地段获取有植被覆盖红土及裸露红土表层样品进行有机质含量分析。结果表明,裸露红土表层有机质含量在0.06 %~3.85 %之间,平均值为1.31 %,远低于同区域有植被生长的山原红壤样品及其它喀斯特地区土壤表层样品。石漠化过程中,植被破坏后土壤有机质大量流失,进而影响土壤结构、保水保肥能力等,导致红土裸露。滇东喀斯特地区成片分布的裸露红土应处在石漠化过程中植被退化但土壤尚未被完全侵蚀的阶段。
英文摘要	The bare laterite is a special desert landscape discovered in east Yunnan in the recent years. In order to un-de rstand the reason for the exposure of the laterite,the organic matter contents in the samples from laterites with and w.thout 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 Iateritic surface-layer, averaging in 1. 31 Yi, 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.
中文关键词	石漠化 ; 红土 ; 裸露 ; 有机质 ; 滇东喀斯特地区
英文关键词	rocky desertification laterite bareness organic matter the karst area of eastern Yunnan
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4750578
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229128
作者单位	云南师范大学旅游与地理科学学院, 昆明, 云南 650500, 中国
推荐引用方式 GB/T 7714	陈虎,王嘉学,胡灿灿,等. 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],2012,31(4):423-425.
APA	陈虎,王嘉学,胡灿灿,&马照伦.(2012).滇东喀斯特地区石漠化裸露红土的表层有机质含量分析.中国岩溶,31(4),423-425.
MLA	陈虎,et al."滇东喀斯特地区石漠化裸露红土的表层有机质含量分析".中国岩溶 31.4(2012):423-425.