Fractal Characteristics of Stagnic Anthrosols and the Relationship with Soil Micro-Structure  

作　　者：XU Xiang-ming HE Yu-rong 

机构地区：[1]Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, P.R.China [2]Graduate University of the Chinese Academy of Sciences, Beijing 100039, P.R. China

出　　处：《Agricultural Sciences in China》2009年第5期605-612,共8页中国农业科学（英文版）

基　　金：supported by the Knowledge Innova-tion Program of the Chinese Academy of Sciences(KZCX2-YW-409) ;the National Key Technology R&D Program of China (2006BAC01A11)

摘　　要：The Stagnic Anthrosols developed from quaternary yellow sedimentary parent material occupied an important position in Southwest China. Fractal dimensions of particle size and micro-aggregate size distributions of Stagnie Anthrosols and their relationship to soil micro-structure had been probed. Results showed that the soil particle size distributions were dominated by clay, the fractal dimensions of particle size distributions （Ds） were high and between 2.676-2.925, as the fractal dimensions of micro-aggregate size distributions （Da） were between 2.354-2.853. The fractal dimensions of particlesize distributions were preferably related with the ratio of coarse particles and fine particles （c/f20 ,m） and the micromorphological feature of skeleton grains. The evolution degree of micro-structure among horizons were reflected by the coefficient of variation of Ds within the profile. The fractal dimensions of micro-aggregate size distributions were related with the quantities, distributions of micro-aggregates and micro-pores. Results revealed that the soil micro-structures could be quantified by fractal dimensions preliminarily.The Stagnic Anthrosols developed from quaternary yellow sedimentary parent material occupied an important position in Southwest China. Fractal dimensions of particle size and micro-aggregate size distributions of Stagnie Anthrosols and their relationship to soil micro-structure had been probed. Results showed that the soil particle size distributions were dominated by clay, the fractal dimensions of particle size distributions （Ds） were high and between 2.676-2.925, as the fractal dimensions of micro-aggregate size distributions （Da） were between 2.354-2.853. The fractal dimensions of particlesize distributions were preferably related with the ratio of coarse particles and fine particles （c/f20 ,m） and the micromorphological feature of skeleton grains. The evolution degree of micro-structure among horizons were reflected by the coefficient of variation of Ds within the profile. The fractal dimensions of micro-aggregate size distributions were related with the quantities, distributions of micro-aggregates and micro-pores. Results revealed that the soil micro-structures could be quantified by fractal dimensions preliminarily.

关 键 词：Stagnic Anthrosols MICRO-AGGREGATE fractal dimension MICRO-MORPHOLOGY 

分 类 号：S152.7[农业科学—土壤学] P642.1[农业科学—农业基础科学]