| 蒋家沟泥石流区新银合欢细根固土效应 |
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| 引用本文： | 郭灵辉,王道杰,陈东,陈晓艳.蒋家沟泥石流区新银合欢细根固土效应[J].水土保持通报,2011,31(5):85-89. |
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| 作者姓名： | 郭灵辉 王道杰 陈东 陈晓艳 |
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| 作者单位： | 1. 中国科学院山地灾害与地表过程重点实验室,四川成都610041／中国科学院水利部成都山地灾害与环境研究所,四川成都610041／中国科学院研究生院,北京100049
2. 中国科学院山地灾害与地表过程重点实验室,四川成都610041／中国科学院水利部成都山地灾害与环境研究所,四川成都610041 |
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| 基金项目： | 国家自然科学基金项目“固氮植物防治泥石流的抑灾作用机制研究”(40771025); 中国科学院知识工程重要方向课题“震裂坡地暴雨型泥石流滑坡区生态恢复理论与技术”(kzcx2-yw-332) |
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| 摘 要： | 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
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| 关 键 词： | 蒋家沟 新银合欢 细根分布 固土效应 |
| 收稿时间： | 2010/12/3 0:00:00 |
| 修稿时间： | 3/3/2011 12:00:00 AM |
Effect of Leucaena Leucocephala Fine Root on Soil Fixation in Debris Flow Area of Jiangjia Gull |
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| Guo Ling-hui,Wang Dao-jie,Chen Dong and Chen Xiao-yan.Effect of Leucaena Leucocephala Fine Root on Soil Fixation in Debris Flow Area of Jiangjia Gull[J].Bulletin of Soil and Water Conservation,2011,31(5):85-89. |
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| Authors: | Guo Ling-hui Wang Dao-jie Chen Dong and Chen Xiao-yan |
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| Institution: | GUO Ling-hui1,2,3,WANG Dao-jie1,CHEN Dong1,CHEN Xiao-yan1,3(1.Key Laboratory of Mountain Hazards and Earth Surface Processes,Chinese Academy of Sciences,Chengdu 610041,China,2.Chengdu Institute of Mountain Hazards and Environment,Ministry of Water Resources,3.Graduate University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Variously aged Leucaena leucocephala in 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 dep... |
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| Keywords: | Jiangjia gully Leucaena leucocephala fine root distribution soil reinforcement effect |
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