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植物根土界面摩擦力的影响因素研究
引用本文:曹云生,陈丽华,刘小光,杨苑君.植物根土界面摩擦力的影响因素研究[J].摩擦学学报,2014,34(5):482-488.
作者姓名:曹云生  陈丽华  刘小光  杨苑君
作者单位:北京林业大学 水土保持学院, 教育部水土保持与荒漠化防治重点实验室, 北京 100083;北京林业大学 水土保持学院, 教育部水土保持与荒漠化防治重点实验室, 北京 100083;北京林业大学 水土保持学院, 教育部水土保持与荒漠化防治重点实验室, 北京 100083;北京林业大学 水土保持学院, 教育部水土保持与荒漠化防治重点实验室, 北京 100083
摘    要:为探索影响林木根系与土壤界面摩擦力的因素,采用施加拔出荷载的方式对林木根系进行单根拔出试验.结果表明:根系与土壤界面的摩擦力随根系直径和埋深的增加而呈线性规律增大;平均摩擦力的大小随土壤含水率的增加呈现先增大后减小的规律;摩擦力随加载速率的增加而减小;不同树种的根系与土壤摩擦力和摩擦系数差异显著,平均摩擦力大小表现为白桦落叶松蒙古栎油松,平均摩擦系数表现为落叶松蒙古栎白桦油松.

关 键 词:根系  土壤  摩擦力  影响因素

The Influence Factors of Plant Root-soil Interface Friction
CAO Yun-sheng,CHEN Li-hu,LIU Xiao-guang and YANG Yuan-jun.The Influence Factors of Plant Root-soil Interface Friction[J].Tribology,2014,34(5):482-488.
Authors:CAO Yun-sheng  CHEN Li-hu  LIU Xiao-guang and YANG Yuan-jun
Affiliation:Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification of Education Ministry, College of Water and Soil Conservation, Beijing 100083, China;Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification of Education Ministry, College of Water and Soil Conservation, Beijing 100083, China;Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification of Education Ministry, College of Water and Soil Conservation, Beijing 100083, China;Beijing Forestry University, Key Laboratory of Soil and Water Conservation and Desertification of Education Ministry, College of Water and Soil Conservation, Beijing 100083, China
Abstract:In order to explore the factors influencing roots-soil interface friction, tests of pullout of single root in soil were carried out. The results show that roots-soil interface friction increased linearly with the increasing diameter and burial depths. The mean friction firstly increased and then decreased with the increasing soil moisture content. The friction force decreased with the increasing loading rate. The difference of root-soil interface friction and friction coefficient were significant between the species. For the mean friction force, Betula platyphylla and Larix gmelinii were the highest, followed by Quercus mongolica and Pinus tabulaeformis was the lowest. For the mean friction coefficient, Larix gmeliniiand and Quercus mongolica were the highest, followed by Betula platyphylla and Pinus tabulaeformis was the lowest.
Keywords:roots  soil  frictional force  influence factor
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