干旱区生态环境知识资源中心(Arid): 西南喀斯特地区土壤饱和导水率及其影响因素研究

Arid

	西南喀斯特地区土壤饱和导水率及其影响因素研究
其他题名	Soil Saturated Hydraulic Conductivity and Its Influential Factors in Southwest Karst Region of China
	李孝良; 陈效民; 周炼川; 方堃
ISSN	1672-3317
出版年	2008
卷号	27 期号:5 页码:74-76,86
中文摘要	通过对西南喀斯特地区典型土壤的饱和导水率的分析，研究了喀斯特地区不同植被退化类型下土壤的饱和导水率及其影响因素。结果表明，西南喀斯特地区不同植被退化类型下土壤的饱和导水率存在着明显的差异，原状土表层饱和导水率在27．210~(-4)～50．810~(-4)cm／s之间，一般未经人为干扰的原始森林土壤饱和导水率〉人为干扰形成的灌丛土壤〉农业用地；在土壤剖面中自上而下饱和导水率明显降低；扰动土壤表层饱和导水率在0．2710~(-4)～1．5310~(-4)cm／s之间，明显低于原状土壤，仅为原状土壤的0．9％～3．0％。喀斯特地区影响土壤饱和导水率的主要因素有土壤容重、土壤孔隙度、土壤有机质含量、土壤质地等。主成分分析结果表明，影响原状土饱和导水率的主要因素为土壤质地和土壤孔性，而土壤孔性是影响扰动土壤导水率的主导因素。
英文摘要	The soil saturated hydraulic conductivity in different vegetation degeneration type and its influential factors in southwest karst region of China were studied. The results showed that the soil saturated hy- draulic conductivity in different vegetation degeneration type had obvious discrepancy, and it was ranked as follows： forest soil, low-growing bushes soil, farmland soil. The range of the undisturbed surface layer＇s saturated hydraulic conductivity was between 27.210~(-4) and 50.8 10~(-4) cm/s. The disturbed surface layer＇s saturated hydraulic conductivity was between 0.2710~(-4) and 1.53 10~(-4)cm/s. Soil bulk density, soil porosity, the soil organic content and soil particle composition were the important impact factors to soil saturated hydraulic conductivity. The factor analysis showed that soil porosity and soil texture were the major factors to the undisturbed soil saturated hydraulic conductivity. But soil porosity was the domi- nant impact factor of the disturbed soil saturated hydraulic conductivity in karst region.
中文关键词	喀斯特地区 ; 饱和导水率 ; 影响因素 ; 石漠化
英文关键词	Karst region soil saturated hydraulic conductivity influential factors rock desertification
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:3402895
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222494
作者单位	南京农业大学资源与环境科学学院, 南京, 江苏 210095, 中国
推荐引用方式 GB/T 7714	李孝良,陈效民,周炼川,等. 西南喀斯特地区土壤饱和导水率及其影响因素研究[J],2008,27(5):74-76,86.
APA	李孝良,陈效民,周炼川,&方堃.(2008).西南喀斯特地区土壤饱和导水率及其影响因素研究.,27(5),74-76,86.
MLA	李孝良,et al."西南喀斯特地区土壤饱和导水率及其影响因素研究".27.5(2008):74-76,86.