干旱区生态环境知识资源中心(Arid): 贵州喀斯特山区石漠化土壤理化性质及分形特征研究

Arid

	贵州喀斯特山区石漠化土壤理化性质及分形特征研究
其他题名	Soil Properties and Fractal Features in the Rocky Desertification Process of Karst Regions, Guizhou Province
	龙健 1; 李娟 2; 邓启琼 1; 李阳兵 1; 熊康宁1
ISSN	0564-3945
出版年	2006
卷号	37 期号:4 页码:635-639
中文摘要	研究了贵州喀斯特山区石漠化过程中土壤颗粒粗化和理化性质特征,土壤颗粒分形的变化特征,以及分形维数与土壤性状的关系.结果表明:土壤细颗粒含量越少,土壤分形维数越低,表征石漠化程度越高;土壤颗粒分形维数与土壤有机质、容重、粘粉粒含量之间存在显著的线形关系(P＜0.01).分形维数能较好地表征喀斯特石漠化过程中土壤物理性质和养分状况以及石漠化的程度,可作为评价喀斯特地区土壤退化的定量指标之一,对区域生态环境的恢复与重建有着重要的指导意义.
英文摘要	The changes of soil particle size distribution and its fractal features as well as the characteristics of soil chemical properties were studied in the rocky desetifiction process of karst Regions. The relationships between fractal dimension of soil particle distribution and selected soil properties were discussed. The results showed that the surface soil layer (0 -20cm) sandification was more evident after rocky desertification pocess.with soil bulk density being increased by 60% , organic matter contents being decreased by 80% , respectively, in the transformation from non-desertified soil to the most severely desertified soil. The fractal dimension of soil particle size distribution ranged from 2. 041 to 2. 872. The more the contents of sand there was, the less the fractal dimension and the higher the desertification degree of soil was found. The fractal dimension decreased from 2. 712 in the non-desertified soil to 2. 125 in the most severly desertified soil in the rocky desertification process. There existed remarkable quantitative relationship between fractal dimension and soil properties. Obviously the fractal model could objectively reflect the texture and fertility status and the degree of soil degradation, so it can be used as a comprehensively quantitative index to evaluate the rocky desertification evolution of soil properties in karst area. The results are important to land and environemental restoration especially in karst rocky desertification region, Guizhou Province in China.
中文关键词	喀斯特环境 ; 土壤性质 ; 石漠化 ; 分形特征
英文关键词	Karst environment Soil properties Rocky desertification Fractal features
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:2414192
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/220230
作者单位	1.贵州师范大学,资源与环境科学系, 贵阳, 贵州 550001, 中国; 2.河南农业大学,资源与环境学院, 郑州, 河南 450002, 中国
推荐引用方式 GB/T 7714	龙健,李娟,邓启琼,等. 贵州喀斯特山区石漠化土壤理化性质及分形特征研究[J]. 贵州师范大学,2006,37(4):635-639.
APA	龙健,李娟,邓启琼,李阳兵,&熊康宁.(2006).贵州喀斯特山区石漠化土壤理化性质及分形特征研究.,37(4),635-639.
MLA	龙健,et al."贵州喀斯特山区石漠化土壤理化性质及分形特征研究".37.4(2006):635-639.