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The influence of plant root system architectural properties upon the stability of loess hillslopes, Northeast Qinghai, China
Fu Jiang-tao1,2; Hu Xia-song1,3; Brierley, Gary4; Qiao Na3; Yu Qin-qin3; Lu Hai-jing3; Li Guo-rong3; Zhu Hai-li1,2
2016-05-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
Volume13Issue:5Pages:785-801
SubtypeArticle
AbstractTo investigate the influence of root system architectural properties of three indigenous (cold-adapted) shrubs on the hillslope stability of loess deposits in the Xining Basin, northeast part of Qinghai-Tibet Plateau (QTP), indoor direct shear tests have been conducted on the remolded rooted soil of three shrubs. Test results show that root system architectural indices (root area ratio (RAR), root length density (RLD) and root density (RD)) of the shrubs decline with depth and the relationship between RAR, RD and depth is exponential, while a power relationship describes the relationship between RLD and depth. The cohesion force of remolded rooted soil for the shrubs initially increases with depth, but it then demonstrates a slightly decreasing trend, which can be described with a power relationship. Power relationships also describe relationships between cohesion force and RAR, RLD and RD for the shrubs. As the growth period increases from 10 to 17 months, the incremental increase in RAR is 48.32% similar to 210.25% for Caragana korshinskii Kom and 0.56% similar to 166.85% for Zygophyllum xanthoxylon (Bunge) Maxim. This proportional increase is notably larger than that for RLD and RD. The increment in RAR is marginally greater for C. korshinskii than it is for Z. xanthoxylon. Correspondingly, the cohesion force incremental rates of remolded rooted soil for C. korshinskii and Z. xanthoxylon are 12.41% similar to 25.22% and 3.45% similar to 17.33% respectively. Meanwhile, as root content increases, the contribution by roots to cohesion force increases markedly until a threshold condition is reached.
KeywordCold Region Semiarid Region Soil Reinforcement Hillslope Stability Root System Architectural Indices Plateau
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
WOS KeywordSOIL-EROSION CONTROL ; SLOPE STABILITY ; SHEAR RESISTANCE ; REINFORCEMENT ; PLATEAU ; STABILIZATION ; GROWTH
Indexed BySCI
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000375790800003
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6318
Collection青海盐湖研究所知识仓储
盐湖地质与环境实验室
Affiliation1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Qinghai Univ, Dept Geol Engn, Xining 810016, Qinghai, Peoples R China
4.Univ Auckland, Sch Environm, Private Bag 92019, Auckland 1142, New Zealand
Recommended Citation
GB/T 7714
Fu Jiang-tao,Hu Xia-song,Brierley, Gary,et al. The influence of plant root system architectural properties upon the stability of loess hillslopes, Northeast Qinghai, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(5):785-801.
APA Fu Jiang-tao.,Hu Xia-song.,Brierley, Gary.,Qiao Na.,Yu Qin-qin.,...&Zhu Hai-li.(2016).The influence of plant root system architectural properties upon the stability of loess hillslopes, Northeast Qinghai, China.JOURNAL OF MOUNTAIN SCIENCE,13(5),785-801.
MLA Fu Jiang-tao,et al."The influence of plant root system architectural properties upon the stability of loess hillslopes, Northeast Qinghai, China".JOURNAL OF MOUNTAIN SCIENCE 13.5(2016):785-801.
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