%0 Journal Article
%T Effects and mechanisms of plant roots on slope reinforcement and soil erosion resistance: A research review.<br>植物根系固坡抗蚀的效应与机理研究进展
%A XIONG Yan-mei
%A XIA Han-ping
%A LI Zhi-an
%A CAI Xi-an
%A <br>熊燕梅
%A 夏汉平
%A 李志安
%A 蔡锡安
%J 应用生态学报
%D 2007
%I 
%X Plant roots play an important role in resisting the shallow landslip and topsoil erosion of slopes by raising soil shear strength. Among the models in interpreting the mechanisms of slope reinforcement by plant roots, Wu-Waldron model is a widely accepted one. In this model, the reinforced soil strength by plant roots is positively proportional to average root tensile strength and root area ratio, the two most important factors in evaluating slope reinforcement effect of plant roots. It was found that soil erosion resistance increased with the number of plant roots, though no consistent quantitative functional relationship was observed between them. The increase of soil erosion resistance by plant roots was mainly through the actions of fiber roots less than 1 mm in diameter, while fiber roots enhanced the soil stability to resist water dispersion via increasing the number and diameter of soil water-stable aggregates. Fine roots could also improve soil permeability effectively to decrease runoff and weaken soil erosion.
%K plant roots
%K slope reinforcement
%K soil shear strength
%K root tensile strength
%K soil erosion resistance<br>植物根系
%K 固坡效应
%K 土体抗剪强度
%K 根系抗拉强度
%K 土壤抗侵蚀性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=DB6081EADC1B651D&yid=A732AF04DDA03BB3&vid=13553B2D12F347E8&iid=E158A972A605785F&sid=2DEC3FE1EFC628C2&eid=46CB56AABC2765FF&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=11&reference_num=65