土石山区护坡草本植物根系抗拉力学特性

doi:10.16843/j.sswc.2017.04.005

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (2774 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract [Background] Landslides caused by soil erosion are common natural geological disasters all over the world. Planting plants on hillsides is an effective project to conserve soil and water during urban construction and mountain development. The mechanical properties of plants are affected by many factors, such as root diameter, root length and rate of water content, as well as the loading ways, loading speed, logging time, etc. Effect of root length and diameter on root tensile properties of herbaceous plants in earth-rocky mountain area is still scarce. [Methods] This study aims at three slope protection plants:Lolium perenne L., Vetiveria zizanioides L. and Paspalum notatum Flugge in earth-rocky mountain areas in Shanxi Province, northern China. Three different root lengths:60, 80 and 100 mm were selected in this study. Root tensile tests were conducted with a WDW-5 universal electronic testing system. In the tests, maximum tensile resistance, ultimate tensile strength and elastic modulus with changing root diameter and root length were measured and analyzed. [Results] The root diameter of V. zizanioides L. and L. perenne L. mainly varied in the range of 0.2-1.0 mm and P. notatum Flugge varied in the range of 0.1-0.4 mm, and the average values of the diameters were 0.639, 0.557 and 0.230 mm respectively. The average maximum tensile resistance of the three species was in the order:V. zizanioides L. (16.258 N) > L. perenne L. (11.734 N) > P. notatum Flugge (4.891 N). The average tensile strength ranked as P. notatum Flugge (116.226 MPa) > L. perenne L. (50.839 MPa) > V. zizanioides L. (49.650 MPa). The average elastic modulus was in order as P. notatum Flugge (20.392 MPa/mm) > V. zizanioides L. (3.257 MPa/mm) > L. perenne L. (3.245 MPa/mm). The elastic modulus of P. notatum Flugge was about six times larger than the others. With certain root length, the maximum root tensile strength of the three plants decreased with root diameter increasing. Within certain root diameter, the maximum root tensile strength decreased with root length increasing. In addition, the elastic modulus decreased with both root diameter and length increasing. [Conclusions] According to the results, P. notatum Flugge has the best ability of soil fixation and slope protection among the studied three species. It can be a suitable species to maintain soil and water. The results provide a data basis for slope protection and soil and water conservation with vegetation in earth-rocky mountain areas.

Key words： root soil and water conservation tensile resistance tensile strength elastic modulus

Received: 15 November 2016

PACS:

S157.5

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	OUYANG Qianchao
	WEI Yang
	ZHOU Xia
	ZHANG Chaobo

Cite this article:

OUYANG Qianchao,WEI Yang,ZHOU Xia, et al. Root tensile properties of the herbaceous plants for slope protection in earth-rocky mountain area, northern China[J]. SSWC, 2017, 15(4): 35-41.

URL:

http://journal12.magtechjournal.com/Jweb_stbc/EN/10.16843/j.sswc.2017.04.005 OR http://journal12.magtechjournal.com/Jweb_stbc/EN/Y2017/V15/I4/35

[1]	史红艳. 浅析水土保持工作的重要性[J]. 青海环境, 2016, 26(1):35. SHI Hongyan. Analyses the importance of soil and water conservation work[J]. Journal of Qinghai Environment, 2016, 26(1):35.
[2]	GENET M, STOKES A, SALIN F, et al. The influence of cellulose content on tensile strength in tree roots[J]. Plant and Soil, 2005, 278(1):3.
[3]	毛伶俐. 生态护坡中植被根系的力学分析[D]. 武汉:武汉理工大学, 2007:28. MAO Lingli. Ecological slope vegetation root mechanical analysis[D]. Wuhan:Wuhan University of Technology, 2007:28.
[4]	李会科, 王忠林. 地埂花椒林根系分布及力学强度测定[J]. 水土保持研究, 2000, 7(1):38. LI Huike, WANG Zhonglin. Determination of Chinese prickly ash tree root distribution and mechanical strength[J]. Research of Soil and Water Conservation, 2000, 7(1):38.
[5]	陈丽华. 林木根系基本力学性质[M]. 北京:科学出版社, 2012:6. CHEN Lihua. Basic mechanical properties of tree roots[M]. Beijing:Science Press, 2012:6.
[6]	杨维西, 赵廷宁. 人工刺槐林采伐后根系固土作用的衰退状况[J]. 水土保持学报, 1990(1):6. YANG Weixi, ZHAO Yanning. After harvesting the root of Locust recession situation effect of soil solids[J]. Journal of Soil and Water Conservation, 1990(1):6.
[7]	左志严, 格日乐, 乌仁图雅, 等. 内蒙古中西部3种乡土植物根系抗拉力学特性的对比研究[J]. 水土保持通报, 2015, 35(2):52. ZUO Zhiyan, GERILE, Wurentuya, et al. Root tensile mechanism comparison of three aboriginal plants in central-western Inner Mongolia area[J]. Bulletin of Soil and Water Conservation, 2015, 35(2):52.
[8]	解明曙. 林木根系固坡土力学机制研究[J]. 水土保持学报, 1990(3):7. XIE Mingshu. Root slope soil mechanics mechanism[J]. Journal of Soil and Water Conservation, 1990(3):7.
[9]	杨永红, 刘淑珍, 王成华,等. 浅层滑坡生物治理中的乔木根系抗拉实验研究[J]. 水土保持研究, 2007, 14(1):138. YANG Yonghong, LIU Shuzhen, WANG Chenghua, et al. A study of tensile strength tests of arborous species root system in forest engineering technique of shallow landslide[J]. Research of Soil and Water Conservation, 2007, 14(1):138.
[10]	朱清科, 陈丽华, 张东升, 等. 贡嘎山森林生态系统根系固土力学机制研究[J]. 北京林业大学学报, 2002, 24(4):64. ZHU Qingke, CHEN Lihua, ZHANG Dongsheng, et al. Study on the mechanism of root soil fixation of forest ecosystem in Gongga mountain[J]. Beijing Forestry University Press, 2002, 24(4):64.
[11]	张东升. 长江上游暗针叶林林木根系抗拉力学特性研究[D]. 北京:北京林业大学, 2002:17. ZHANG Dongsheng. Study on root tensile mechanical properties of dark coniferous forest at the upper reaches of Yangtze River[D]. Beijing:Beijing Forestry University, 2002:17.
[12]	钟荣华, 鲍玉海, 贺秀斌, 等. 三峡水库消落带4种草本根系抗拉特性及根系粘聚力[J]. 水土保持学报, 2015, 29(4):188. ZHONG Ronghua, BAO Yuhai, HE Xiubin, et al. Tensile properties and root cohesion of 4 herb roots in Three Gorges Reservoir[J]. Journal of Soil and Water Conservation, 2015, 29(4):188.
[13]	肖宏彬, 赵亮, 李珍玉, 等. 香根草根系的分布形态及抗拉强度试验研究[J]. 中南林业科技大学学报, 2014(3):6. XIAO Hongbin, ZHAO Liang, LI Zhenyu, et al. Experimental study on Vetiveria Zizanioides root system distribution and tensile strength[J]. Journal of Central South University of Forestry and Technology, 2014(3):6.
[14]	王萍花. 华北四种常见乔木根系固土的力学特性研究[D]. 北京:北京林业大学, 2012:33. WANG Pinghua. Study on mechanical properties of four kinds of common tree roots in North China[D]. Beijing:Beijing Forestry University, 2012:33.
[15]	张超波. 林木植物根系固土护坡力学基础研究[D]. 北京:北京林业大学, 2011:46. ZHANG Chaobo. Fundamental and mechanical study on soil reinforcement and slope protection by woody plant roots[D]. Beijing:Beijing Forestry University, 2011:46.
[16]	李晓凤, 陈丽华, 王萍花. 华北落叶松根系抗拉力学特性[J]. 中国水土保持科学, 2012, 10(1):82. LI Xiaofeng, CHEN Lihua, WANG Pinghua. Tensile mechanical properties of roots of Larix principis-rupprechtii[J]. Science of Soil and Water Conservation, 2012, 10(1):82.
[17]	HATHSWAY R L, PENNY D. Root strength in some Populus and Salix clones[J]. New Zealand Journal of Botany, 1975, 13(3):333.
[18]	程洪, 张新全. 草本植物根系网固土原理的力学试验探究[J]. 水土保持通报, 2002, 22(5):20. CHEN Hong, ZHANG Xinquan. An experimental study on herb plant root system for strength principle of soil-fixation[J]. Bulletin of Soil and Water Conservation, 2002, 22(5):20.