干旱区生态环境知识资源中心(Arid): 不同土地利用类型下土壤粒径分形分析以黄土丘陵沟壑区为例

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	不同土地利用类型下土壤粒径分形分析以黄土丘陵沟壑区为例
其他题名	Fractal analysis on soil particle size distributions under different land-use types: a case study in the loess hilly areas of the Loess Plateau, China
	王德 1; 傅伯杰 1; 陈利顶 1; 赵文武 2; 汪亚峰 1
ISSN	1000-0933
出版年	2007
卷号	27 期号:7 页码:3081-3089
中文摘要	土壤粒径分布影响土壤的水力特性、土壤肥力状况以及土壤侵蚀等,是重要土壤物理特性之一.在水蚀严重的黄土丘陵沟壑区,不同的土地利用类型对水土流失的阻截作用不同,因而进一步导致其土壤粒径分布的差异.对不同土地利用类型下土壤粒径分布的分形和多重分形分析发现:黄绵土土壤粒径分布包含有3个无标度区间,分别为粘粒域、粉粒域和砂粒域;土壤粒径分布的分形维数D、粉粒域维数D_(silt)、砂粒域维数D_(sand)、信息维数D_1、信息维数/容量维数D_1/D_0与土壤细颗粒含量和有机质含量成显著的正相关关系;土地利用对分形维数D、粉粒域维数D_(silt)、砂粒域维数D_(sand)、容量维数D_0、信息维数D_1、信息维数/容量维数比值D_1/D_0的影响较显著.这表明这些分形和多重分形参数可以作为反映土壤物理性质和土壤质量的潜在性指标,其实用性有待进一步探讨.
英文摘要	Soil particle-size distribution (PSD) is one of the most important physical attributes due to its strong influence on soil properties related to water movement, productivity and skil erosion. The fractal and multifractal measures were useful tools in identifying soil PSD with different taxonomy. Land-use type, as one of important factors to affect soil PSD, was paid little attention in the previous research. In this paper, Tyler and Wheatcraft power law and multifractal Renyi dimension were applied to characterize PSD in soils with the same taxonomy and different land-use types. Then the effects of land use on the fractal and multifractal parameters were analyzed. The study was conducted on the loess hilly areas of the Loess Plateau in China, of which the environment is characterized by hilly terrain with an altitude between 997 and 1731m, and semi-arid climate with a mean annual rainfall of 505mm and temperature of 8.6℃. A Calcic Cambisols soil was sampled from five land use types: woodland, shrub land, grassland, terrace farmland and abandoned slope farmland with planted trees (ASFP). The soil PSDs were obtained by laser diffraction technique using a Longbench Mastersizer2000. The result showed that: (1) fractal and multifractal parameters reflect different aspect of soil PSDs. There existed three power-law domains, namely D_(sand), D_(silt), D_(clay) in all PSDs and can be ranked as D_(sand) > D_(silt) > D_(clay). The boundaries of three domains were close to the soil textural classification boundaries. (2) fractal dimension (D), dimension of silt domain (D_(silt)),dimension of sand domain (D_(sand)), entropy dimension (D_1) and entropy dimension/capacity dimension ratio (D_1/D_0) were significantly positively correlated with finer particle content. thus they could be potential parameters to reflect soil physical propertias influenced by land use. (3) D, D_(silt), Dsand, D_0, D_1 and D_1/D_0 were correlated with soil organic matter and were influenced by land use, providing potential indicator of soil quality influenced by land use. More significant result is required in the future study to test the applicability of fractal and multifractal parameters in characterizing land use effect on soil PSDs.
中文关键词	土壤粒径分布 ; 土地利用 ; 分形特征 ; 多重分形 ; 土壤侵蚀
英文关键词	soil particle-size distributions land use fractal characteristics multifractal characteristics soil erosion
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:2842443
来源机构	北京师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/221346
作者单位	1.中国科学院生态环境研究中心, 城市与区域生态国家重点实验室, 北京 100085, 中国; 2.北京师范大学资源学院资源管理研究所, 北京 100875, 中国
推荐引用方式 GB/T 7714	王德,傅伯杰,陈利顶,等. 不同土地利用类型下土壤粒径分形分析以黄土丘陵沟壑区为例[J]. 北京师范大学,2007,27(7):3081-3089.
APA	王德,傅伯杰,陈利顶,赵文武,&汪亚峰.(2007).不同土地利用类型下土壤粒径分形分析以黄土丘陵沟壑区为例.,27(7),3081-3089.
MLA	王德,et al."不同土地利用类型下土壤粒径分形分析以黄土丘陵沟壑区为例".27.7(2007):3081-3089.