基于多重分形的土壤粒径分布与土壤物理特性关系  

Relationships between Soil Particle Size Distribution and Soil Physical Properties Based on Multifractal

作　　者：管孝艳[1] 杨培岭[2] 吕烨[1] 

机构地区：[1]中国水利水电科学研究院水利研究所,北京100048 [2]中国农业大学水利与土木工程学院,北京100083

出　　处：《农业机械学报》2011年第3期44-50,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51009152);国家高技术研究发展计划(863计划)资助项目(2006AA100205-1);水利部公益性行业科研资助项目(200701025);国际科技合作资助项目(2009DFA71850)

摘　　要：为阐明粒径分布与土壤物理特性之间的关系,测定了土壤颗粒组成、土壤容积密度和饱和导水率等参数,运用多重分形谱参数描述了土壤粒径分布的非均匀性,探讨了土壤粒径分布多重分形参数与土壤容积密度、饱和导水率等参数之间的关系。结果表明:土壤粒径分布的多重分形谱参数D1/D0和Δα可以反映土壤粒径分布的非均匀程度,参数与土壤粘粒含量密切相关,当土壤非均质性较大时,土壤中粘粒含量较多,表现为土壤容积密度增大,而饱和导水率减小。因此,土壤粒径分布的多重分形参数可以作为反映土壤物理性质的指标。In order to describe the relationship between soil particle size distribution and soil physical properties,the parameters of soil particle size distribution,soil bulk density and soil saturated hydraulic conductivity were measured,and the heterogeneity of soil particle size distribution was characterized by the parameters of multifractal spectrum,and then the relationship between multifractal parameters of soil particle size distribution and soil bulk density,soil saturated hydraulic conductivity were discussed.The results showed that the heterogeneity of soil particle size distribution could be reflected by the multifractal parameters of soil particle size distribution such as D1/D0 and Δα,the multifractal parameters were closely related with soil clay content,and when the soil heterogeneity is larger,the soil clay content is higher,and that results in soil bulk density increasing,soil saturated hydraulic conductivity decreasing.Therefore,the multifractal parameters of soil parameters can be used as an indicator to reflect the soil physical properties.

关 键 词：土壤 物理特性 粒径分布 多重分形 

分 类 号：S152.3[农业科学—土壤学] S152.9[农业科学—农业基础科学]