Effects of layer thickness on desiccation cracking behaviour of a vegetated soil

作     者：Congying Li Qing Cheng Chaosheng Tang Yingdong Gu Lingxin Cui Haowen Guo 

作者机构：School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023China Department of Civil and Environmental EngineeringHong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 

出 版 物：《Biogeotechnics》 (生物岩土技术（英文）)

年 卷 期：2024年第2卷第2期

页      面：47-53页

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：support from the National Natural Science Foundation of China(Grant No.42172290,42230710,41925012) the Natural Science Foundation of Jiangsu Province(Grant No.BK20221250) 

主　　题：Desiccation crack Vegetated soil Layer thickness Root density 

摘      要：The objective of this study is to explore how different layer thicknesses affect the desiccation cracking behaviour of vegetated *** the experiment,an electronic balance was employed to quantify water evaporation,while a digital camera was utilized to capture the initiation and progression of soil surface *** indicate that in the early drying process,the rate of evapotranspiration in vegetated soil correlates positively with leaf *** soil samples with the same layer thickness,the constant rate stage duration is consistently shorter in vegetated soil samples than in their bare soil *** the layer thickness increases,both vegetated and bare soil samples crack at higher water ***,vegetated soil samples crack at lower water content than their bare soil *** significantly reduces the soil surface crack ratio and improves the soil crack *** crack reduction ratio is positively correlated with both root weight and length *** thicker vegetated soil layers,the final surface crack length noticeably declines.