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根系逐渐破坏过程中固土效果研究

郭翬 王云琦 王青兰 王玉杰 张会兰 王彬 朱锦奇 李云鹏

郭翬, 王云琦, 王青兰, 王玉杰, 张会兰, 王彬, 朱锦奇, 李云鹏. 根系逐渐破坏过程中固土效果研究[J]. 北京林业大学学报, 2015, 37(6): 85-92. doi: 10.13332/j.1000-1522.20140386
引用本文: 郭翬, 王云琦, 王青兰, 王玉杰, 张会兰, 王彬, 朱锦奇, 李云鹏. 根系逐渐破坏过程中固土效果研究[J]. 北京林业大学学报, 2015, 37(6): 85-92. doi: 10.13332/j.1000-1522.20140386
GUO Hui, WANG Yun-qi, WANG Qing-lan, WANG Yu-jie, ZHANG Hui-lan, WANG Bin, ZHU Jin-qi, LI Yun-peng. Change of soil fixation effects in the process of gradual damage[J]. Journal of Beijing Forestry University, 2015, 37(6): 85-92. doi: 10.13332/j.1000-1522.20140386
Citation: GUO Hui, WANG Yun-qi, WANG Qing-lan, WANG Yu-jie, ZHANG Hui-lan, WANG Bin, ZHU Jin-qi, LI Yun-peng. Change of soil fixation effects in the process of gradual damage[J]. Journal of Beijing Forestry University, 2015, 37(6): 85-92. doi: 10.13332/j.1000-1522.20140386

根系逐渐破坏过程中固土效果研究

doi: 10.13332/j.1000-1522.20140386
基金项目: 

北京高等学校青年英才计划项目(YETP0751)。

详细信息
    作者简介:

    郭翬。主要研究方向:根系固土。Email:531948988@qq.com 地址:100083 北京市清华东路35号北京林业大学水土保持学院。责任作者: 王云琦,博士,副教授。主要研究方向:水土保持工程。 Email: wangyunqi@bjfu.edu.cn 地址: 同上。

    郭翬。主要研究方向:根系固土。Email:531948988@qq.com 地址:100083 北京市清华东路35号北京林业大学水土保持学院。责任作者: 王云琦,博士,副教授。主要研究方向:水土保持工程。 Email: wangyunqi@bjfu.edu.cn 地址: 同上。

Change of soil fixation effects in the process of gradual damage

  • 摘要: 植物根系的固土效果会随根系破坏而发生变化,但其变化过程并不明确。以重庆缙云山的四川山矾为研究对象,以2 mm为根系径级,采用逐径级剪除根系法模仿根系逐渐遭到破坏的过程;同时测量根系的抗拉与抗拔强度,利用自制大盒直剪仪测量根土复合体的抗剪强度,并与Wu模型计算值作对比,系统研究根系逐渐破坏过程中的固土效果。结果表明,春季生四川山矾3年幼苗的植物根系抗拉强度随着根系直径的减小而减小。当根系直径小于2 mm时,根系拉拔强度要高于植物根系的抗拉强度,当根系直径大于2 mm时,则根系抗拉强度更大。大盒直剪测量结果显示,根系破坏过程中根土复合体的抗剪强度首先保持不变,当大于2 mm的根系开始与土壤分离时,根土复合体的抗剪强度会快速下降。在一定范围内,根面积比越大,根土复合体的抗剪强度越大,根系对土壤的加固作用越强。在根系逐渐破坏过程中,Wu模型在一定程度上高估了根土复合体的抗剪强度,且高估值与根面积比呈正相关关系。

     

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  • 收稿日期:  2014-10-23

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