Scaling the Roots Mechanical Reinforcement in Plantation of Cunninghamia R. Br in Southwest China

doi:10.3390/f12010033

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Scaling the Roots Mechanical Reinforcement in Plantation of Cunninghamia R. Br in Southwest China
	Mehtab, Alam 1,2; Jiang, Yuan-Jun 1,2; Su, Li-Jun 1,2,3; Shamsher, Sadiq 4; Li, Jia-Jia 1,5; Mahfuzur, Rahman 1,2,6
刊名	FORESTS
	2021
卷号	12 期号:1 页码:33
关键词	standing forest trees slope stability landslide tree stem diameter root cohesion root tensile strength
DOI	10.3390/f12010033
通讯作者	Jiang, Yuan-Jun(yjjiang@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	The degree of mechanical reinforcement provided by plants depends upon its roots distribution in the soil and mechanical properties of the roots. The mechanical properties and distribution of root traits (root diameter and number) in the soil of the standing forest depends on the tree stem diameter. This variation of root traits with tree stem diameter is rarely investigated. Therefore, this research presents the effect of tree stem diameter on the distribution of roots within the standing forest of Cunninghamia in the Longchi forest area, Sichuan province, China. In this area, shallow landslides take place frequently. We investigated the root traits distribution for trees with different stem diameters, i.e., 220 mm, 320 mm, 450 mm, and 468 mm, to show the variation of roots distribution in the soil with stem diameter. The root architecture of the selected trees was studied by step excavation method of the root zone accompanied by measurement of roots physical parameters (roots number and roots diameter) and indices (roots area ratio (RAR), roots biomass (RB), and roots distribution (RD)). We measured the root's maximum tensile strength by performing root tensile tests in the laboratory. The field and laboratory-measured data were used to estimate the root cohesion by both the commonly used model Wu and Waldron Model (WWM) and Fiber Bundle Model (FBM). The results indicate that the tree stem diameter correlates with both the root distribution and the tensile strength. The roots indices and root cohesion increase with an increase in the diameter of the tree. Further, RAR decreases with depth and lateral distance from the tree stem, while the maximum values were observed in 10 cm depth. The relationship between roots diameter and roots tensile strength is established through power function. The average root cohesion estimated for a tree with stem diameter 220 mm is 23 kPa, 29 kPa for 320 mm, 54 kPa for 450 mm, and 63 kPa for 460 mm. This effect of stem diameter on the increase of soil shear resistance should be considered while evaluating the stability of slopes in standing forests. The comparison between WWM and FBM for investigated species suggests that WWM estimates the cohesion values greater than FBM by 65%.
电子版国际标准刊号	1999-4907
资助项目	National Natural Science Foundation of China[41761144077] ; Strategic Priority Research Program of the Chinese Academy of Science[XDA 23090202]
WOS研究方向	Forestry
语种	英语
出版者	MDPI
WOS记录号	WOS:000610223200001
资助机构	National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55237]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Jiang, Yuan-Jun
作者单位	1.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Ghulam Ishaq Khan Inst Engn Sci & Technol GIKI To, Swabi 23640, Kpk, Pakistan 5.Sichuan Agr Univ, Coll Water Resource & Hydropower, Yaan 625014, Peoples R China 6.Int Univ Business Agr & Technol, Dept Civil Engn, Dhaka 1230, Bangladesh
推荐引用方式 GB/T 7714	Mehtab, Alam,Jiang, Yuan-Jun,Su, Li-Jun,et al. Scaling the Roots Mechanical Reinforcement in Plantation of Cunninghamia R. Br in Southwest China[J]. FORESTS,2021,12(1):33.
APA	Mehtab, Alam,Jiang, Yuan-Jun,Su, Li-Jun,Shamsher, Sadiq,Li, Jia-Jia,&Mahfuzur, Rahman.(2021).Scaling the Roots Mechanical Reinforcement in Plantation of Cunninghamia R. Br in Southwest China.FORESTS,12(1),33.
MLA	Mehtab, Alam,et al."Scaling the Roots Mechanical Reinforcement in Plantation of Cunninghamia R. Br in Southwest China".FORESTS 12.1(2021):33.