2期 张季如等：微观尺度上土壤孔隙及其分维数的S分析 215 SEM ANALYSIS OF SOIL PORE AND ITS FRACTAL DIMENSION ON MICRO SCALE Zhang Jiru Huarg Li Zhu Jie Huang Wenjing (Schad Ciil Erginaring and Archisecture.Wuhan thienity$Teelndoy.Whan 000 Chim) (SEM)poducing SEM mages in the scale ranging to 127.aralysis of size and mumber of pores and their dis tributions.The mass fractal dmesion D and the surface fradal dmension D.of soil pores are obtained from the measured data. The fier the soil tetue,the aer the bulk demsity,the wer th porsity,the hghe the percentage of small pore and th arger the D.D displaved a sigmnificant linear reression relaionship with soil bulk density and soil porosity of so1.D.reflects the degree of the in and the rger the D.them tribution of D.was found in agreement with a total romal distribution in soil pore Both D ad D.was sensitive o variation of nanagemet pattem and tillage system of soils and they may be cited as useful indicators for soil management. Key words Soil pore:Micro sle Mass fradal dimersion D:Surface fractal dmension D:SEM analysis 1994-2011 China Academic Journal Electronie Publishing House.All rights reserved.http://www.cnki.netSEM ANALYSIS OF SOIL PORE AND ITS FRACTAL DIMENSION ON MICRO SCALE Zhang Jiru Huang Li Zhu Jie Huang Wenjing ( School of Civil Engineering and Architecture, Wuhan University of Technology , Wuhan 430070, China ) Abstract Samples of two soils different in soil texture were collected and scanned with a scanning electron microscope (SEM) producing SEM images in the scale ranging from 01 to 1278
m for analysis of size and number of pores and their dis
tributions The mass fractal dimension Dm and the surface fractal dimension Ds of soil pores are obtained from the measured data The analysis shows that the certain correlativity of Dm existed with soil texture, bulk density, porosity and pore
size distribution The finer the soil texture, the larger the bulk density, the lower the porosity, the higher the percentage of small pores, and the larger the Dm Dm displayed a significant linear regression relationship with soil bulk density and soil porosity of soil Ds reflects the degree of irregularity of the pore
solid interface in soil, and the larger the Ds the more irregular the soil pore profile The dis
tribution of Dswas found in agreement with a total normal distribution in soil pore Both Dm and Dswas sensitive to variation of management pattern and tillage system of soils and they may be cited as useful indicators for soil management Key words Soil pore;Micro scale;Mass fractal dimension Dm; Surface fractal dimension Ds ; SEM analysis 2 期 张季如等: 微观尺度上土壤孔隙及其分维数的 SEM 分析 215