四川山矾根系分支节点对根系固土效益的影响

doi:10.11707/j.1001-7488.20210212

Abstract

Abstract:

Objective: The objective of this study is to qualify the effect of root architecture and mechanical traits on root soil reinforcement, and further understand the mechanism of the root-soil interactions and soil consolidation. Method: The tensile strength, Young's modulus, friction and other mechanical characteristics of root system of Symplocos setchuensis were measured with a modified universal testing machine. Furthermore, the shear strength of root soil samples was measured by self-made large box direct shear device, in order to find out the multiple relationships between root architecture, mechanical, and soil reinforcement traits. Result: Firstly, there was a power function relationship between the root diameter of S. setchuensis with root length, tensile strength, Young's modulus, as well as pullout force. Among them, the root diameter was negatively correlated with root tensile strength, and Young's modulus, while the root diameter was positively related to root length and pullout force. Secondly, there was a strong positive relationship between root branching and pullout force. However, there was no significant statistical difference between the branching and pullout force per unit root length (or diameter). Thirdly, The increase of root branching nodes was able to significantly improve the soil reinforcement effect of root system, and each branching node could increase the additional shear strength of root system by about 50%. Moreover, the branching nodes also could increase the reinforcement effect per unit length and root diameter. Fourthly, Principal component analysis showed that root length was found strongly correlated with root reinforcement at the maximum point while diameter was strongly correlated with root reinforcement at yield point. Conclusion: The study quantified the positive influence of S. setchuensis root mechanical properties and branches on its resistance of pullout and soil shear behavior. This information is important to improve the accuracy of root reinforcement estimated and our understanding of root reinforcement mechanism.

Key words: root diameter, root length, root branch, pullout force, shear strength

CLC Number:

S774
S714.7

Jinqi Zhu,Yunqi Wang,Yujie Wang,Bofu Zheng,Yipu Li. Effects of Root Branch of Symplocos setchuensis on Root Soil Reinforcement[J]. Scientia Silvae Sinicae, 2021, 57(2): 115-125.

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	陈丽华, 余新晓, 宋维峰, 等. 林木根系固土力学机制. 北京: 科学出版社, 2008.
	Chen L H , Yu X X , Song W F , et al. Mechanical properties of rooted soil. Beijing: Science Press, 2008.
	陈丽华, 余新晓, 张东升. 整株林木垂向抗拉试验研究. 资源科学, 2004, 26 (增1): 39- 43.
	Chen L H , Yu X X , Zhang D S . Experimental study on vertically tensile strength of whole tree. Resources Science, 2004, 26 (Supp. 1): 39- 43.
	李国荣, 胡夏嵩, 毛小青, 等. 寒旱环境黄土区灌木根系护坡力学效应研究. 水文地质与工程地质, 2008, 35 (1): 94- 97.
	Li G R , Hu X S , Mao X Q , et al. A study of the mechanical effects of shrub roots for slope protection in frigid and arid-semiarid loess area. Hydrogeology and Engineering Geology, 2008, 35 (1): 94- 97.
	李国荣, 胡夏嵩, 毛小青, 等. 青藏高原东北部黄土区灌木根系护坡效应的数值模拟. 岩石力学与工程学报, 2012, 29 (9): 1877- 1884.
	Li G R , Hu X S , Mao X Q , et al. Numerical simulation of shrub roots for slope protection effects on loess area of Northeast Qinghai-Tibetan Plateau. Chinese Journal of Rock Mechanics and Engineering, 2012, 29 (9): 1877- 1884.
	李绍才, 孙海龙, 杨志荣, 等. 护坡植物根系与岩体相互作用的力学特性. 岩石力学与工程学报, 2006, 25 (10): 2051- 2057. doi: 10.3321/j.issn:1000-6915.2006.10.016
	Li S C , Sun H L , Yang Z R , et al. Mechanical characteristics of interaction between root system of plants and rock for rock slope protection. Chinese Journal of Rock Mechanics and Engineering, 2006, 25 (10): 2051- 2057. doi: 10.3321/j.issn:1000-6915.2006.10.016
	刘鹏飞. 4种植物侧根分支处抗折力学特性的研究. 呼和浩特: 内蒙古农业大学硕士学位论文, 2016,
	Liu Pengfei . The Anti-facture mechanical Characterisic of four kinds of lateral-root branches. Hohhot: MS thesis of Inner Mongolia Agricutural University, 2016,
	刘晓敏. 5种植物侧根分支处抗拉力学特性的研究. 呼和浩特: 内蒙古农业大学硕士学位论文, 2013,
	Liu X M . The Tensile mechanical properties of five kinds of plants lateral root branch. Hahhot: MS thesis of Inner Mongolia Agricutural University, 2015,
	刘亚斌, 余冬梅, 付江涛, 等. 黄土区灌木柠条锦鸡儿根-土间摩擦力学机制试验研究. 农业工程学报, 2017, 33 (10): 198- 205. doi: 10.11975/j.issn.1002-6819.2017.10.026
	Liu Y B , Yu D M , Fu J T , et al. Experimental study on root-soil friction mechanical mechanism of Caragana korshinskii Kom. in loess area. Transactions of the Chinese Society of Agricultural Engineering, 2017, 33 (10): 198- 205. doi: 10.11975/j.issn.1002-6819.2017.10.026
	刘玥. 4种植物直段根和侧根分支处抗弯力学特性的研究. 内蒙古农业大学硕士学位论文, 2015,
	Liu Y . The bending mechanical properties of four kinds of plants straight root and lateral root branch. Hohhot: MS thesis of Inner Mongolia Agricutural University, 2015,
	卢海静, 胡夏嵩, 付江涛, 等. 寒旱环境植物根系增强边坡土体抗剪强度的原位剪切试验研究. 岩石力学与工程学报, 2016, 35 (8): 1712- 1721.
	Lu H J , Hu X S , Fu J T , et al. In-situ shearing test on the shear strengh of soil slope reinforced by plant roots in cold and arid environments. Chinese Journal of Rock Mechanics and Engineering, 2016, 35 (8): 1712- 1721.
	解明曙. 林木根系固坡土力学机制研究. 水土保持学报, 1990, 4 (3): 7- 14.
	Xie M S . A study on the soil mechanical role of tree roots in the stability of slopes. Journal of Soil and Water Conservation, 1990, 4 (3): 7- 14.
	姚喜军, 王林和, 刘静, 等. 5种植物侧根分支处的抗拉力学特性研究. 西北农林科技大学学报: 自然科学版, 2015, 43 (11): 91- 98.
	Yao X J , Wang L H , Liu J , et al. Mechanical properties of tensile at lateral branches of five plants. Journal of Northwest A&F University, 2015, 43 (11): 91- 98.
	张兴玲, 胡夏嵩, 毛小青, 等. 青藏高原东北部黄土区护坡灌木柠条锦鸡儿根系拉拔摩擦试验研究. 岩石力学与工程学报, 2011, 30 (增2): 3739- 3745.
	Zhang X J , Hu X S , Mao X Q , et al. Research on pull-out friction test of shrub Caragana korshinskii roots for slope protection in loess area of Northeast Qinghai-Tibetan Plateau. Chinese Journal of Rock Mechanics and Engineering, 2011, 30 (Supp. 2): 3739- 3745.
	中国科学院中国植物志编辑委员会. 中国植物志. 北京: 科学出版社, 2004.
	Flora of China Editorial Committee . Flora of China. Beijing: Science Press, 2004.
	朱锦奇, 王云琦, 王玉杰, 等. 基于试验与模型的根系增强抗剪强度分析. 岩土力学, 2014, 35 (2): 449- 458.
	Zhu J Q , Wang Y Q , et al. Analysis of root system enhancing shear strength based on experiment and model. Rock and Soil Mechanics, 2014, 35 (2): 449- 458.
	朱锦奇, 王云琦, 王玉杰, 等. 基于植物生长过程的根系固土机制及Wu模型参数优化. 林业科学, 2018, 54 (4): 49- 57.
	Zhu J Q , Wang Y Q , Wang Y J , et al. Analyses on root reinforcement mechanism based on plant growth process and parameters optimization of Wu Model. Scientia Silvae Sinicae, 2018, 54 (4): 49- 57.
	Abe K , Iwamoto M . An evaluation of tree-root effect on slope stability by tree-root strength. Journal of the Japanese Forestry Society, 1986, 68 (12): 505- 510.
	Bourrier F , Kneib F , Chareyre B , et al. Discrete modeling of granular soils reinforcement by plant roots. Ecological Engineering, 2013, 61 (1): 646- 657.
	Cohen D , Schwarz M , Or D . An analytical fiber bundle model for pullout mechanics of root bundles. Journal of Geophysical Research: Earth Surface, 2011, 116, F03010.
	Docker B B , Hubble T C T . Quantifying root-reinforcement of river bank soils by four Australian tree species. Geomorphology, 2008, 100 (3/4): 401- 418.
	Fan C C , Su C F . Effect of soil moisture content on the deformation behaviour of root-reinforced soils subjected to shear. Plant and Soil, 2009, 324 (1/2): 57- 69. doi: 10.1007/s11104-008-9856-1
	Fan C C , Su C F . Role of roots in the shear strength of root-reinforced soils with high moisture content. Ecological Engineering, 2008, 33 (2): 157- 166. doi: 10.1016/j.ecoleng.2008.02.013
	Ghestem M , Veylon G , Bernard A , et al. Influence of plant root system morphology and architectural traits on soil shear resistance. Plant and Soil, 2014, 377 (1/2): 43- 61. doi: 10.1007/s11104-012-1572-1
	Giadrossich F , Schwarz M , Cohen D , et al. Methods to measure the mechanical behaviour of tree roots: a review. Ecological Engineering, 2017, 109 (Part B): 256- 271.
	Giadrossich F , Schwarz M , Cohen D , et al. Mechanical interactions between neighbouring roots during pullout tests. Plant and soil, 2013, 367 (1/2): 391- 406. doi: 10.1007/s11104-012-1475-1
	Gray D H, Barker D H. 2013. Root-soil mechanics and interactions. Riparian vegetation and fluvial geomorphology. American Geophysical Union, Washington, DC.
	Hales T C , Ford C R , Hwang T , et al. Topographic and ecologic controls on root reinforcement. Journal of Geophysical Research: Earth Surface, 2009, 114 (F3): F03013.
	Li Y , Wang Y , Ma C , et al. Influence of the spatial layout of plant roots on slope stability. Ecological Engineering, 2016, 91, 477- 486. doi: 10.1016/j.ecoleng.2016.02.026
	Mao Z , Saint-André L , Genet M , et al. Engineering ecological protection against landslides in diverse mountain forests: choosing cohesion models. Ecological Engineering, 2012, 45, 55- 69. doi: 10.1016/j.ecoleng.2011.03.026
	Mao Z , Wang Y , McCormack M L , et al. Mechanical traits of fine roots as a function of topology and anatomy. Annals of Botany, 2018, 122 (7): 1103- 1116.
	Mao Z , Yang M , Bourrier F , et al. Evaluation of root reinforcement models using numerical modelling approaches. Plant and Soil, 2014, 38 (1/2): 249- 270. doi: 10.1007/s11104-014-2116-7
	Mickovski S B , Bengough A G , Bransby M F , et al. Material stiffness, branching pattern and soil matric potential affect the pullout resistance of model root systems. European Journal of Soil Science, 2007, 58 (6): 1471- 1481. doi: 10.1111/j.1365-2389.2007.00953.x
	Mickovski S B , Hallett P D , Bransby M F , et al. Mechanical reinforcement of soil by willow roots: impacts of root properties and root failure mechanism. Soil Science Society of America Journal, 2009, 734, 1276- 1285.
	Pollen N . Temporal and spatial variability in root reinforcement of streambanks: accounting for soil shear strength and moisture. Catena, 2007, 69 (3): 197- 205. doi: 10.1016/j.catena.2006.05.004
	Riestenberg M M , Sovonick-Dunford S . The role of woody vegetation in stabilizing slopes in the Cincinnati area, Ohio. Geological Society of America Bulletin, 1983, 94 (4): 506- 518. doi: 10.1130/0016-7606(1983)94<506:TROWVI>2.0.CO;2
	Schwarz M , Cohen D , Or D . Root-soil mechanical interactions during pullout and failure of root bundles. Journal of Geophysical Research: Earth Surface, 2010, 115 (F4): F04035.
	Schwarz M , Cohen D , Or D . Pullout tests of root analogs and natural root bundles in soil: experiments and modeling. Journal of Geophysical Research: Earth Surface, 2011, 116 (F2): F02007.
	Schwarz M , Giadrossich F , Cohen D . Modeling root reinforcement using a root-failure Weibull survival function. Hydrology and Earth System Sciences, 2013, 17 (11): 4367- 4377. doi: 10.5194/hess-17-4367-2013
	Shibuya M , Zhang H , Endo A , et al. Two branches of the lupeol synthase gene in the molecular evolution of plant oxidosqualene cyclases. Eur J Biochem, 1999, 266 (1): 302- 307. doi: 10.1046/j.1432-1327.1999.00875.x
	Soil Survey Staff . Keys to soil taxonomy. Department of Agriculture: Natural Resources Conservation Service, 2003,
	Stokes A , Atger C , Bengough A G , et al. Desirable plant root traits for protecting natural and engineered slopes against landslides. Plant and Soil, 2009, 324 (1/2): 1- 30.
	Stokes A , Salin F , Kokutse A D , et al. Mechanical resistance of different tree species to rockfall in the French Alps. Plant and Soil, 2005, 278 (1/2): 107- 117.
	Thompson M J , White D J . Design of slope reinforcement with small-diameter piles. Advances in Earth Structures: Research to Practice, ASCE, 2006, 67- 73.
	Waldron L J . The shear resistance of root-permeated homogeneous and stratified soil. Soil Science Society of America Journal, 1977, 41 (5): 843- 849. doi: 10.2136/sssaj1977.03615995004100050005x
	Waldron L J , Dakessian S . Soil reinforcement by roots: calculation of increased soil Shear resistance from root properties. Soil Science, 1981, 132 (6): 427- 435. doi: 10.1097/00010694-198112000-00007
	Wu T H . Root reinforcement: analyses and experiments//Stokes A, Spanos I, Norris J E, et al. Eco and ground bioengineering: the use of vegetation to improve slope stability. Springer, 2007, 21- 30.
	Zhang C B , Chen L H , Jiang J . Why fine tree roots are stronger than thicker roots: The role of cellulose and lignin in relation to slope stability. Geomorphology, 2014, 206, 196- 202. doi: 10.1016/j.geomorph.2013.09.024

土层 Soil layer/cm	土壤密度 Soil density/(g·cm^-3)	土壤紧实度 Soil compactness/kPa	土壤液限 Liquid limit (%)	土壤塑限 Plastic limit (%)	土壤有机质含量 Soil organic matter content/(g·kg^-1)
0~10	1.12 ± 0.22	42.64 ± 3.79	32.34	20.73	26.40 ± 13.94
10~30	1.30 ± 0.22	68.43 ± 6.67	34.51	21.84	18.63 ± 7.37
30~50	1.35 ± 0.19	78.91 ± 5.88	33.68	22.37	9.79 ± 4.61

分支节点数量 Noumber of root branches	拔出力均值 Average value of root pullout force/N	单位根长拔出力均值 Average value of root pullout force per root length/(N·m^-1)	附加抗剪强度均值Average value of root reinforcement/kPa
分支节点数量 Noumber of root branches	拔出力均值 Average value of root pullout force/N		屈服点Yield point	极值点Maximum point
0	367.77 ± 273.17	1.53 ± 0.56	1.00 ± 0.52	0.92 ± 0.46
1	769.10 ± 282.39	1.79 ± 0.37	1.41 ± 0.42	1.41 ± 0.38
2	950.06 ± 249.19	2.13 ± 0.26	1.83 ± 0.52	1.86 ± 0.49
3	909.28 ± 171.44	2.06 ± 0.20	2.12 ± 0.51	2.09 ± 0.41
4	1 278.57 ± 264.46	2.27 ± 0.27	2.74 ± 0.38	2.95 ± 0.41

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Effects of Root Branch of Symplocos setchuensis on Root Soil Reinforcement

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