[1]陆桂红,欧国强,杨 顺,等.泥石流源区典型草本植物根系抗拉试验[J].山地学报,2014,(06):725.
　LU Guihong,OU Guoqiang,YANG Shun,et al.Root Tensile Test of Typical Grass in Debris Flow Triggering Area[J].Mountain Research,2014,(06):725.
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泥石流源区典型草本植物根系抗拉试验 ()
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《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2014年06期
页码:
725
栏目:
山地灾害
出版日期:
2014-08-01

文章信息/Info

Title:
Root Tensile Test of Typical Grass in Debris Flow Triggering Area
作者:
陆桂红; 欧国强; 杨 顺; 王 钧; 宇 岩
1. 中国科学院山地灾害与地表过程重点实验室/中国科学院水利部成都山地灾害与环境研究所，四川 成都 610041；
2. 中国科学院大学，北京 100049
Author(s):
LU Guihong;  OU Guoqiang;  YANG Shun;  WANG Jun;  YU Yan
1.Key Laboratory of Mountain Hazards and Surface Process, Chinese Academy of Sciences/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
泥石流源区; 典型植物; 抗拉力; 抗拉强度
Keywords:
debris flow triggering area;  typical plants;  tensile force;  tensile strength
分类号:
S157.2
文献标志码:
A
摘要:
植被对于泥石流源区的生态修复和物源稳定具有重要意义，其中植物根系的抗拉力学特性是影响植物护坡的主要因素之一。为了探究泥石流源区植物根系的抗拉特性，以都江堰市锅圈岩泥石流源区为研究区，在野外调查的基础上，通过重要值计算确定了源区典型草本植物并进行抗拉强度试验。研究表明，锅圈岩泥石流源区主要分布有寒芒、节节草等对恶劣环境适应性强的乡土植物，它们的根系平均分布深度在30 cm以内；根系抗拉力与根径呈幂函数正相关关系，抗拉力随根径的增大而增大。当根径＞0.50 mm时，抗拉强度与根径也表现出幂函数关系；当根径＜0.50 mm时，部分植物根系的抗拉强度值波动较大。不同植物根系的平均抗拉强度从大到小依次为铁杆蒿（106.24 MPa）、节节草（非节点处，30.79 MPa）、草地早熟禾（28.69 MPa）、小飞蓬（20.20 MPa）、多头苦荬（18.77 MPa）、寒芒（老根，14.87 MPa）、节节草（节点处，12.67 MPa）、寒芒（新根，8.29 MPa）。泥石流源区草本植物的根系抗拉力学特性良好，对稳固浅层土体和泥石流物源有积极作用。
Abstract:
Plant roots play an important role in slope vegetation and stability in debris flow triggering area. And root tensile property is one of the major factors affecting slope protection of plants. In order to explore the root tensile properties of plants in debris flow triggering area, this paper took Guojuanyan debris flow triggering area in Dujiangyan Sichuan,China for the study area. Based on field survey and significant values, the typical plants species were determined and their root tensile tests were carried out. Studies have shown that Guojuanyan debris flow triggering area was mainly distributed with indigenous plants such as Miscanthus floridulu and Commelina diffusa. They are adaptable and with an average root depth of 30 cm or less. These plant roots’ tensile force presented power function with root diameter and had good correlation. When the root diameter was greater than 0.50 mm, the tensile strength and root diameter could also be fitted with power function. When the root diameter was less than 0.50 mm,the tensile strength values of some plant roots fluctuated largely. And the average tensile strength in order were Artemisia sacrorum (106.24 MPa) ,Commelina diffusa (nonnode, 30.79 MPa), Poa pratensis (28.69 MPa), Conyza canadensis (20.20MPa), long Kumai (18.77 MPa), Miscanthus floridulu (old roots, 14.87 MPa), Commelina diffusa (node, 12.67 MPa), Miscanthus floridulu (new roots, 8.29 MPa ). Root tensile mechanical properties of herbs performed well, indicating that they can play efficiency in shallow slope stability and reduce debris provenance.

相似文献/References:

[1]陈舜,王道杰,梅永丽,等.泥石流源区崩滑土体粒度特征及其产沙特性[J].山地学报,2014,(01):66.
　CHEN Shun,WANG Daojie,MEI Yongli,et al.The Research of Grain Composition and Sediment Generation on Landslipcollapse Soil in Debris Flow Original Area[J].Mountain Research,2014,(06):66.
[2]陈宁生,张军.泥石流源区弱固结砾石土的渗透规律[J].山地学报,2001,(02):169.

备注/Memo

备注/Memo:
收稿日期(Received date)：2013-08-01；改回日期(Accepted): 2013-11-15。
基金项目（Foundation item）：水利部公益性行业科研专项（NO. 201301058），中国科学院山地灾害与地表过程重点实验室自主资助项目，科技部国际合作项目(批准号：20133DFA21720)。
作者简介（Biography）：陆桂红（1988-），女，河北邢台人，硕士研究生，主要从事植物根系固土机理研究。\[Lu Guihong(1988- ), female, born in Xingtai, Hebei Province, master, major in mechanism of soil reinforced with plant root system.\] E-mail：luguihong88@gmail.com *
通信作者(Corresponding author)：欧国强（1958-），研究员，主要从事山地灾害基础研究。\[Ou Guoqiang(1958- ), professor, mainly engaged in basic research of mountain hazards.\] E-mail：ougq@imde.ac.cn
更新日期/Last Update: 1900-01-01