Effects of solar radiation and fine roots on suction of Amorpha fruticose-vegetated soil

作     者：GUO Han-qing CHEN Xiao-qing SONG Dong-ri MU Qing-yi SADEGHI Hamed JIANG Hao LV Ming GUO Han-qing;CHENXiao-qing;SONG Dong-ri;MU Qing-yi;SADEGHI Hamed;JIANG Hao;LV Ming

作者机构：Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610299China University of Chinese Academy of SciencesBeijing 100049China Department of Civil EngineeringXi'an Jiaotong UniversityXi'an 710049China Department of Civil EngineeringSharif University of TechnologyTehran ***Iran 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第6期

页      面：1790-1804页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程] 

基　　金：the financial supports from the National Natural Science Foundation of China(grant No.41925030 and 4179043) the Second Tibetan Plateau Scientific Expedition and Research Program(STEP,grant No.2019QZKK0904) the Natural Science Foundation of Shaanxi Province(2020JQ-041) 

主　　题：Field monitoring Fine roots Solar radiation Suction Shallow bedrock landslide 

摘      要：The thickness of shallow landslides is generally less than 2 m,which is of the same order of magnitude as the growth range of vegetation *** roots can improve the stability of shallow soil through mechanical and hydraulic ***,the landslide process is closely related to the plant roots growing on the slope *** roots play a dominant role in the regulation of soil suction through solar radiation induced ***,little is known about the correlation between cumulative solar radiation and soil ***,the specific effects of fine roots on the suction distribution are not clear in most previous *** this study,a vegetated soil of a drought-tolerant and water-tolerant shrub,namely Amorpha fruticose,was *** suction and volumetric water content of bare and vegetated soils were monitored under natural conditions for 4 *** results demonstrate that there is a nearly linear relationship between cumulative solar radiation and suction ranging from zero to 100 *** the modeling of the soil-plant-atmosphere interactions,this relationship could serve a significant role in calculating the root water uptake under given solar radiation *** addition,higher suctions were observed at the lower layer of the vegetated soil than those at the middle layer,which is different from the results of vegetated soil from previous *** is due to the fact that the root area index(RAI)of fine roots at the lower layer is twice that of the middle ***,the higher concentration of fine roots at the lower layer of vegetated soil sample resembles the root distribution of shrub near the soil-bedrock interface on shallow bedrock *** fine roots would increase soil suction through transpiration,and hence reduce the permeability and increase shear strength of ***,these new findings serve as a preliminary step on the evaluation of the stability of this common ty