辽宁省古红土颗粒分形特征研究

目的]为了使用颗粒大小分形维数定量化描述土壤的物理风化程度。方法]以分布于辽宁省的古红土为研究对象,利用杨培岭等确定的土壤颗粒大小分形维数计算方法计算古红土的颗粒大小分形维数,并分析维数与土壤各粒级含量、母质、质地、砂粉黏比、粉黏比的关系。结果]结果表明:辽宁省古红土的颗粒大小分形维数介于2.6255～2.8640,随土壤黏粒含量的增加而变大。结论]分形维数的大小能反映成土母质风化的难易,不能简单用以定量描述土壤的质地特性,但可以用以代替土壤的砂粉黏比定量描述土壤的风化程度。

Study on Fractal Features of Paleosol in Liaoning Province

Objective The aim was to describe the degree of soil physical weathering by fractal dimension of granule size.Method Taking paleosol in Liaoning Province as research material,its granule component was analyzed in lab.Fractal dimension of paleosol granule size were calculated by the method of fractal dimension of soil particle developed by Yang Peiling.The relationship between fractal dimension and each soil granule content,parent material,soil texture,silt and sand /clay and silt /clay was analyzed.Result Fractal dimension of paleosol granule size in Liaoning Province ranged from 2.625 5～2.864 0.It changed with the increase of soil clay content.Conclusion Fractal dimension had high correlation with the weathering feasibility of parent material.It could take the place of silt and sand /clay and silt /clay to describe weathering degree quantitatively.