云南松幼树垂直根的土壤增强作用  

Role of Vertical Roots of Young Yunnan Pine on Soil Reinforcement

作　　者：周跃[1] 李宏伟[2] 徐强[3] 

机构地区：[1]云南省地理研究所,昆明650223 [2]云南省林业调查规划设计院 [3]云南教育学院地理系

出　　处：《水土保持学报》2000年第z1期110-113,121,共5页Journal of Soil and Water Conservation

基　　金：国家自然科学研究基金资助项目!(编号 4 92 0 1 0 0 3和 4 9871 0 54) ;云南省应用基础研究基金资助! (编号 98D0 0 7M);云南省科

摘　　要：植物垂直根系对加强根际土层的整体强度和提高其斜向滑动阻力具有重要作用。经过对云南中部地区云南松幼树的野外测试和模型预测 ,证实了该树种垂直根的这种作用。剪切实验表明 ,松树垂直根可以使根际土层的整体抗剪强度平均提高 0 .98MPa,使土层对斜向滑动的阻力提高了 4 2 .0 9%。预测结果得到的强度增量平均值是 2 ..6 7MPa。分析认为 ,云南松垂直根作用的真实量值介于这 2种方法的确定值之间。Plant vertical roots plays an important role in increasing in the whole strength of rooted soil layer and rising its resistance to lateral slide. This role of young Yunnan pine in the central Yunnan area was verified, through techniques of in-situ test and modeling prediction. Shearing test in the field shows that, the pines vertical roots are able to increase the whole shear strength of the rooted soil layer by average 0.98 MPa, enhancing 42.09% of the resistance of the rooted soil against lateral sliding. By modeling prediction, the increased magnitude of shear strength of the soil is 2.67 MPa. Based on analysis, the true magnitude of strength increase of the rooted soil layer, duo to the role of the pines vertical roots, very likely lays in the range of the two results.

关 键 词：云南松 垂直根 土壤增强 侵蚀控制 

分 类 号：S715.3[农业科学—林学]