[1]王莉茹,康永祥*,巫翠华,等. 黄土高原陡坡土坎植被根-土复合体抗剪强度研究[J].西北林学院学报,2021,36(2):17-23.[doi:10.3969/j.issn.1001-7461.2021.02.03]
 WANG Li-ru,KANG Yong-xiang*,WU Cui-hua,et al. Shear Strength of Root-Soil Composite of Vegetation on Steep Slope Ridge of Loess Plateau[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2021,36(2):17-23.[doi:10.3969/j.issn.1001-7461.2021.02.03]
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 黄土高原陡坡土坎植被根-土复合体抗剪强度研究()
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第36卷
期数:
2021年第2期
页码:
17-23
栏目:
出版日期:
2021-03-31

文章信息/Info

Title:
 Shear Strength of Root-Soil Composite of Vegetation on Steep Slope Ridge of Loess Plateau
文章编号:
1001-7461(2021)02-0017-07
作者:
 王莉茹康永祥*巫翠华李华申旭芳
 (西北农林科技大学 林学院,陕西 杨陵 712100)
Author(s):
 WANG Li-ruKANG Yong-xiang*WU Cui-huaLI HuaSHEN Xu-fang
 (College of Forestry,Northwest A&F University,Yangling 712100,Shaanxi,China)
关键词:
 黄土高原重力侵蚀植被根系根-土复合体抗剪强度
Keywords:
 Loess Plateau gravity erosion vegetation roots root-soil composite shear strength
分类号:
S718.45
DOI:
10.3969/j.issn.1001-7461.2021.02.03
文献标志码:
A
摘要:
 以黄土高原陡坡土坎6种典型植物群落类型为研究对象,在分析植被根系密度指标的基础上,通过直剪试验,探讨不同植物群落的根-土复合体抗剪强度以及根系对提高抗剪强度的作用。结果表明:1)6种群落的根系密度指标值均具有显著性差异,白刺花-铁杆蒿群落的根重密度、根长密度和根表面积密度在所有群落类型中均为最高,分别为2 757.07 g/m3、17 886.22 m/m3和16.96 m2/m3;2)6种群落之间的根-土复合体的抗剪强度均显著高于素土抗剪强度,其中白刺花-铁杆蒿群落相对于素土的抗剪强度增加值最大,为32.98 kPa,且抗剪强度增加值随土层深度增加而降低;3)根-土复合体抗剪强度相对于素土抗剪强度的增加值与根系密度指标值呈对数函数关系,随根系含量增加而升高。
Abstract:
 Six different community types in the steep slopes of the Loess Plateau were chosen as the objects in this study,the effects of vegetation roots density characteristics on the increase of soil shear strength were studied through the direct shear method.The results showed that 1) the root density indexes of the 6 communities were all significantly different,the root weight density,root length density and root surface area density of Sophora davidii-Artemisia sacrorum community were all the highest with the values of 2 757.07 g/m3,17 886.22 m/m3,and 16.96 m2/m3,respectively.2) The shear strength of the 6 communities were all higher than that of pure soil,the increase of the shear strength of Sophora davidii-Artemisia sacrorum community was the highest with the value of 32.98 kPa,which decreased with the soil depth.3) The increase of the shear strength showed a logarithmic relationship with root characteristics,and increased with root content.

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备注/Memo

备注/Memo:
 收稿日期:2020-06-09修回日期:2020-07-16
基金项目:国家重点研发计划“高塬沟壑区固沟保塬生态防护与苹果产业提质增效技术及示范”(2016YFC0501706-01)。
作者简介:王莉茹,硕士在读。研究方向:森林生态学。E-mail:wangliru1994@163.com
*通信作者:康永祥,博士,教授。研究方向:树木学及古树名木保护技术。E-mail:yxkang@nwsuaf.edu.cn
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