[1]徐海燕,于卫洁,王巧利,等.黄土丘陵沟壑区主要物种根茎力学特性[J].水土保持研究,2016,23(01):313-318,324.
　XU Haiyan,YU Weijie,WANG Qiaoli,et al.Mechanical Properties of Stem and Root of Main Plant Species in the Hilly-Gully Loess Plateau[J].Research of Soil and Water Conservation,2016,23(01):313-318,324.
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黄土丘陵沟壑区主要物种根茎力学特性

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 23 期数: 2016年01期 页码: 313-318,324 栏目: 出版日期: 2016-02-28
Title:
Mechanical Properties of Stem and Root of Main Plant Species in the Hilly-Gully Loess Plateau
作者:
徐海燕1, 于卫洁2, 王巧利3, 焦菊英2
1. 西北农林科技大学 林学院, 陕西 杨凌 712100;
2. 西北农林科技大学 水土保持研究所, 陕西 杨凌 712100;
3. 周河镇政府, 陕西 靖边 718500
Author(s):
XU Haiyan1, YU Weijie2, WANG Qiaoli3, JIAO Juying2
1. College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China;
3. Zhouhe Township Government, Jingbian, Shaanxi 718500, China
关键词:
黄土丘陵沟壑区; 抗拉力; 抗弯刚度; 抗弯强度; 力学特性
Keywords:
the Hilly-Gully Loess Plateau; tensile resistance; bending stiffness; bending strength; mechanical property
分类号:
S157.1
摘要:
植物根茎力学特性影响着植被固定土壤和拦截的能力，是植被抗侵蚀特性研究不可缺少的一部分。在延河流域选取的6个典型小流域内，对铁杆蒿（Artemisia gmelinii）、茭蒿（Artemisia giralii）、达乌里胡枝子（Lespedeza davurica）、阿尔泰狗哇花（Heteropappus altaicus）、猪毛蒿（Artemisia scoparia）、蒙古蒿（Artemisia mongolica）的根茎进行广泛采样，在测量其根直径、抗拉力、抗拉强度、茎直径、抗弯强度和刚度、木质素和纤维素含量等指标的基础上，探讨了植物根茎力学特性。结果表明：根系直径与抗拉力呈显著的正相关关系，与抗拉强度呈显著的负相关关系，且均可用幂函数进行拟合；随着茎的直径增长抗弯刚度不断加强、抗弯强度趋于稳定；猪毛蒿茎平均直径、最大抗压力和抗弯刚度较其他物种大；达乌里胡枝子的茎抗弯刚度较小，根系抗拉强度和茎抗弯强度却最大；抗弯强度与木质素含量、纤维素含量和纤维素/木质素均具有显著的相关关系。
Abstract:
Mechanical properties of plant affect the capacity of vegetation to stabilize soil and intercept sediment and litter, and the survey on them is an indispensable part of the study on soil anti-erosion ability. Six small watersheds were selected for sampling in Yanhe River Basin. The main species were Artemisia gmelinii, Artemisia giralii, Lespedeza davurica, Heteropappus altaicus, Artemisia scoparia and Artemisia mongolica. Their mechanical properties were surveyed. The results showed that the root diameter for every species had significant correlation with its tensile resistance and tensile strength (p < 0.05), respectively, and both of them could be fitted by power function. As stem diameter increased, its stiffness strengthened and its strength became stable. For the stem of Artemisia scoparia, its main diameter, tensile resistance and bending stiffness were larger than those of the other species. Stem bending strength and root tensile strength of Lespedeza davurica were larger than those of the other species. Stem bending strength had significant correlation with cellulose content, lignin content and cellulose-content/lignin-content (p < 0.05) among the main species, respectively.

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备注/Memo

收稿日期:2015-06-18;改回日期:2015-06-24。
基金项目:水利部公益性行业科研专项经费项目（201501045）；国家自然科学基金面上项目“黄丘区坡面退耕与淤地坝对坡沟系统侵蚀产沙的阻控机理”（41371280）；国家科技支撑计划项目“黄河中游主要来沙区林草减沙作用分析”（2012BAB02B05-3）
作者简介:徐海燕(1989-),女(蒙古族),内蒙古兴安盟人,硕士研究生,研究方向为流域生态学。E-mail:545906813@qq.com
通讯作者:焦菊英(1965-),女,陕西宝鸡人,博士,研究员,博士生导师,主要从事土壤侵蚀与植被关系及水土保持效益评价的研究。E-mail:jyjiao@ms.iswc.ac.cn

更新日期/Last Update: 1900-01-01