IMHE OpenIR  > 山地表生过程与生态调控重点实验室
三峡库区紫色土坡耕地草本植物根系固结地埂的土力学机制
Alternative TitleThe Mechanics of Soil Reinforcement by Root on the Hedge of the Sloping Cultivated Lands of Purple Soils in the Three Gorges Reservoir Region
周萍; 文安邦; 严冬春; 史忠林; 龙翼
2017
Source Publication水土保持学报
ISSN1009-2242
Volume31Issue:1Pages:85-90
SubtypeArticle
Contribution Rank1
Abstract

为揭示三峡库区紫色土坡耕地草本植物根系对地埂土壤固结作用的土力学机制,选取库区3种草本地埂植物为研究对象,对3种地埂植物根系的分布特征及抗拉性能进行研究,并分析3种地埂土壤的抗冲性和抗剪强度。研究结果表明,紫花苜蓿、蓑草、桂牧一号的根系总生物量分别为(79.371.26),(97.991.66),(71.76 1.96)g/m~2,紫花苜蓿根系在0-10cm土层分布最多,蓑草主要根系分布深度集中在10-20cm,桂牧一号根系分布在0-30cm土层深度范围内呈现出递增的趋势,在30-40cm土层深度根系含量不到10%。3种草本地埂植物根系的平均抗拉力为桂牧一号(7.93N)>蓑草(6.03N)>紫花苜蓿(5.40N),3种地埂植物根系单根抗拉力与根径呈幂函数关系,蓑草地埂植物根系的单根抗拉力与根径的相关性最高。3种地埂植物根系的抗拉强度表现为蓑草根系(45.91MPa)>紫花苜蓿根系(19.68MPa)>桂牧一号根系(15.28MPa)。3种不同草本地埂植物根系间的抗拉力和抗拉强度差异达到显著水平(P<0.05)。3种植物地埂土壤的抗冲性变化为蓑草地埂(85.28L/(min·g))>紫花苜蓿(69.47L/(min·g))>桂牧一号(60.86L/(min·g)),蓑草地埂土壤的抗冲性与紫花苜蓿和桂牧一号间存在显著差异(P<0.05)。3种草本植物地埂土壤的抗剪强度顺序为蓑草地埂(115.49kPa)>紫花苜蓿(91.73kPa)>桂牧一号(75.14kPa)。结果表明,蓑草地埂在三峡库区具有较好的固埂防蚀效果,在三峡库区坡耕地固结地埂土壤中发挥重要作用。三峡库区草本植物固结地埂可为三峡库区坡耕地整治提供新思路。

Other Abstract

Aimed to reveal the mechanics of the soil reinforcement by root on the hedge of the sloping cultivated lands of purple soils in the Three Gorges Reservoir region,chosen three herbage hedge plants as the objects of this study.The root distribution and tensile strength of the three herbage hedge plants in the Three Gorges Reservoir region were compared.The results showed that the root biomass of Medicago sativa, Eulaliopsis binata and Pennisetum americanum *P.purpureum were(79.371.26)g/m~2,(97.99 1.66)g/m~2 and(71.761.96)g/m~2,respectively.And the main root of Medicago sativa distributed in the 0 to 10 cm soil depth,the main root of Eulaliopsis binata distributed in the 10 to 20 cm soil depth and the main root of Pennisetum americanum *P.purpureumdistributed deeper,in the 20 to 30 cm soil depth.The order of the average tensile resistance of the three herbage root were:Pennisetum americanum * P.purpureum(7.93N)>Eulaliopsis binata (6.03N)>Medicago sativa (5.40N).There existed the power function relationship between the tensile resistance and root diameter,and there existed the highest correlation of Eulaliopsis binata roots.Meanwhile,the order of the tensile strength of the three herbage root were:Eulaliopsis binata (45.91MPa)>Medicago sativa (19.68MPa)>Pennisetum americanum *P.purpureum (15.28 MPa).There exited obviously significant difference of the tensile resistance and tensile strength among the three herbages roots(P<0.05).The order of the soil anti-scouribility of the three herbage hedges were Eulaliopsis binata (85.28L/(min·g))>Medicago sativa (69.47L/(min·g))>Pennisetum americanum * P.purpureum (60.86L/(min·g)),and there existed obviously significant difference among the soil anti-scouribility of the herbage hedges(P<0.05).While the value of the soil shear strength had the similar order.However,there did not existed obviously significant difference among the soil shear strength of the herbage hedges(P>0.05).The results showed that the Eulaliopsis binata hedge had better soil reinforcement and soil conservation in this region.And the herbage reinforced the hedges was a new idea for the sloping cultivated lands harnessing in the Three Gorges Reservoir region.

Keyword三峡库区 坡耕地地埂 草本植物根系 固土力学作用
DOI10.13870/j.cnki.stbcxb.2017.01.015
Indexed ByCSCD
Language中文
CSCD IDCSCD:5931010
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/23029
Collection山地表生过程与生态调控重点实验室
科技与合作处
Corresponding Author严冬春
Affiliation中国科学院水利部成都山地灾害与环境研究所/山地表生过程与生态调控重点实验室
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
周萍,文安邦,严冬春,等. 三峡库区紫色土坡耕地草本植物根系固结地埂的土力学机制[J]. 水土保持学报,2017,31(1):85-90.
APA 周萍,文安邦,严冬春,史忠林,&龙翼.(2017).三峡库区紫色土坡耕地草本植物根系固结地埂的土力学机制.水土保持学报,31(1),85-90.
MLA 周萍,et al."三峡库区紫色土坡耕地草本植物根系固结地埂的土力学机制".水土保持学报 31.1(2017):85-90.
Files in This Item:
File Name/Size DocType Version Access License
三峡库区紫色土坡耕地草本植物根系固结地埂(283KB)期刊论文出版稿开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[周萍]'s Articles
[文安邦]'s Articles
[严冬春]'s Articles
Baidu academic
Similar articles in Baidu academic
[周萍]'s Articles
[文安邦]'s Articles
[严冬春]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[周萍]'s Articles
[文安邦]'s Articles
[严冬春]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 三峡库区紫色土坡耕地草本植物根系固结地埂的土力学机制_周萍.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.