IMHE OpenIR  > 山地灾害与地表过程重点实验室
蒋家沟泥石流区新银合欢细根固土效应
Alternative TitleEffect of Leucaena Leucocephala Fine Root on Soil Fixation inDebris Flow Area of Jiangjia Gully
郭灵辉1,2,3; 王道杰1,2; 陈东1,2,3; 陈晓艳1,2,3
2011
Source Publication水土保持通报
ISSN1000-288X
Volume7Issue:3Pages:85-89+214
SubtypeArticle
Contribution Rank1
Abstract以蒋家沟泥石流区不同龄级新银合欢根系为研究对象,在分析其垂直分布与构成特征的基础上,运用加筋原理研究其固土效应。结果显示,不同龄级新银合欢根系表聚现象明显,随土层深度的增加呈减少趋势,约80%集中在0-120cm土层范围内;细根(D≤1mm)在整个细根根系中所占比例较大,决定着整个细根的分布趋势;10年生新银合欢D≤1mm细根较5年生增幅明显,15年生1mm
Other AbstractVariously aged Leucaena leucocephalain debris flow area of Jiangjia gully were chosen and the fine root systems were dug out from the surface to the bottom layers at different distances from the stem in three directions.Basing on the analysis of fine root vertical distributions and composition, the effect of fine roots on the soil shear strength were estimated according to reinforcement theory.The result show that fine roots exhibited an obvious accumulation trait in the topsoil layer, which reduced with depth.Approximately 80% of the fine root materials were found in the layer between 0-120cm depths.Fine roots were mainly composed of smaller ones(D≤1mm)and determined the development of root distribution.The 10-year stands had more fine roots(D≤1mm)than 5-year ones, and the 15-year stands had obviously more intermediate roots(1mm≤D≤2mm)comparing to the 10-year stands.Root tensile strength decreased significantly with increasing diameter, following apower law function.The soil shear strength enhanced by fine roots was highly variable among depths and ages, largely depended on the smaller roots(D≤1mm).
Keyword蒋家沟 新银合欢 细根分布 固土效应
DOI10.13961/j.cnki.stbctb.2011.05.038
Indexed ByCSCD
Language中文
CSCD IDCSCD:4346657
Citation statistics
Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26025
Collection山地灾害与地表过程重点实验室
Corresponding Author王道杰
Affiliation1.中国科学院山地灾害与地表过程重点实验室;
2.中国科学院水利部成都山地灾害与环境研究所;
3.中国科学院研究生院
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
郭灵辉,王道杰,陈东,等. 蒋家沟泥石流区新银合欢细根固土效应[J]. 水土保持通报,2011,7(3):85-89+214.
APA 郭灵辉,王道杰,陈东,&陈晓艳.(2011).蒋家沟泥石流区新银合欢细根固土效应.水土保持通报,7(3),85-89+214.
MLA 郭灵辉,et al."蒋家沟泥石流区新银合欢细根固土效应".水土保持通报 7.3(2011):85-89+214.
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