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黄土丘陵沟壑区主要物种根茎力学特性
徐海燕1; 于卫洁2; 王巧利3; 焦菊英2
2016
Source Publication水土保持研究
Volume23Issue:1Pages:313-318
Abstract

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。

Other 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 Artemisiascoparia,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.

Keyword黄土丘陵沟壑区 抗拉力 抗弯刚度 抗弯强度 力学特性
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8741
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学
2.西北农林科技大学水土保持研究所
3.周河镇政府
Recommended Citation
GB/T 7714
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(1):313-318.
APA 徐海燕,于卫洁,王巧利,&焦菊英.(2016).黄土丘陵沟壑区主要物种根茎力学特性.水土保持研究,23(1),313-318.
MLA 徐海燕,et al."黄土丘陵沟壑区主要物种根茎力学特性".水土保持研究 23.1(2016):313-318.
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