ISWC OpenIR  > 水保所知识产出(1956-2013)
护坡植物根系分布及抗拉力学特性
袁雪红1,2; 高照良1,3; 张翔4; 杜捷3; 张小娟3
2016
Source Publication南水北调与水利科技
Volume14Issue:5Pages:117-123
Abstract

:为了探讨草本植物根系固土的主要机制。以适宜的护坡植物白三叶、小冠花、黑麦草、早熟禾为研究对象,对
它们的根系分布特征和抗拉特性进行研究。结果表明:随着土层深度的增加,禾本科植物的根长密度以指数函数形
式逐渐减少,豆科植物的根长密度以多项式形式先增后减;随着距主茎距离的增加,禾本科植物根长密度逐渐减少,
豆科植物根长密度先增后减;在根径0.1~3mm范围内,豆科植物平均抗拉力大于禾本科植物,豆科植物的抗拉力
与根径呈幂函数关系,早熟禾和黑麦草的抗拉力与根径分别呈指数函数和对数函数关系;四种植物根系抗拉强度均
表现为随根径的增加而减小;四种植物根系应力与应变关系表现为对数函数关系,表现为非线性弹性特征;根径相
同时,不同植物的应力表现为:白三叶>小冠花>黑麦草>早熟禾。运用主成分分析法综合分析其护坡特性,表现
为豆科植物优于禾本科植物,其中白三叶的护坡效益最好。

Other Abstract

In order to reveal the mechanism of soil reinforcement by herb roots,we selected 4typical hillslope protection plants,
Trifolium repens L,Coronilla varia L,Lolium perenne L and Poa annua L to study the spatial distribution of root length density
and tensile properties.The result showed:With the increase of the soil depth,the root length density(RLD)of gramineous
plants gradually reduced in the form of exponential function,while the RLD of legumes first increased and then decreased,with
apolynomial fitting curve.With the increase of the distance to the stem,RLD of gramineous plants decreased gradually,while
RLD of legumes plants increased first and then decreased.In the roots diameter range of 0.1~3mm,the average tensile resistance
of leguminous plants was greater than that of the gramineae plants.Legume's root tensile resistance and root diameter
showed a power function relationship,and the relationship between tensile resistance and diameter of Kentucky bluegrass and
ryegrass was exponential function and logarithmic function relationship,respectively.The tensile strength of four species de-
·117creased with the increases of root diameter and their stress and strain showed a logarithmic function relationship,which illustrated
that their roots were inelastic.At the same diameter,different plants showed variance with stress as ranked:White Clover>
Crown vetch> Ryegrass> Kentucky bluegrass.Using the principal component analysis(PCA)to comprehensively analyze
the characteristics of the plant to protect the slope,we could conclude that leguminous plants were better than gramineous
plants and White Clover was the optimal in the four plants.

Keyword草本植物 根长密度 抗拉强度 应力 主成分分析
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/361005/8558
Collection水保所知识产出(1956-2013)
Affiliation1.中国科学院水利部水土保持研究所
2.中国科学院大学
3.西北农林科技大学 水土保持研究所
4.西北农林科技大学水利与建筑工程学院
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
袁雪红,高照良,张翔,等. 护坡植物根系分布及抗拉力学特性[J]. 南水北调与水利科技,2016,14(5):117-123.
APA 袁雪红,高照良,张翔,杜捷,&张小娟.(2016).护坡植物根系分布及抗拉力学特性.南水北调与水利科技,14(5),117-123.
MLA 袁雪红,et al."护坡植物根系分布及抗拉力学特性".南水北调与水利科技 14.5(2016):117-123.
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