%0 Journal Article
%A ZHANG Qiao-yan
%A TANG Li-xia
%A RAN Jie
%A TAN Wei-yi
%T Frictional Characteristics of Root-Soil Interface of <i>Indigofera amblyantha</i> and <i>Cassia bicapsularis</i>
%D 2023
%R 10.11988/ckyyb.20210822
%J Journal of Yangtze River Scientific Research Institute
%P 161-164
%V 40
%N 1
%X As common tree species,<i>Indigofera amblyantha</i> and <i>Cassia bicapsularis</i> have positive effects on slop stability and ecological restoration.To study their mechanism of slope protection,we investigated the influences of apparent morphology and roughness of roots on frictional strength of root-soil interface of 4-year age <i>Indigofera amblyantha</i> and <i>Cassia bicapsularis</i>.Results showed that:1)Grooves dominate the root skin of <i>Indigofera amblyantha</i>,and grids prevail on the root skin of <i>Cassia bicapsularis</i>.With the increase of root diameter,such apparent morphology grows more obvious.2)The roughness of root surface increases with the expansion of root diameter.When root diameter expands from 1 mm to 5 mm,the roughness of <i>Indigofera amblyantha</i> increases from 0.26 to 0.48,while that of <i>Cassia bicapsularis</i> from 0.24 to 0.66.3)Root with grid skin morphology has larger frictional strength on the root-soil interface,and the greater the roughness,the larger the frictional strength of root-soil interface.According to the micromorphology and quantified roughness as well as test verification,we established the relationship between the microstructure of root skin and the macroscopic friction and shear of root-soil interface.The research finding is of great significance for the study of the mechanical properties of slope protection by root system.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20210822