草本植物根系网固土效果研究分析——以紫花苜蓿护坡效果为例

摘要

文章以东北林业大学实验林场公路边坡为试验地,通过种植紫花苜蓿,观察其发芽状况、生长速度、覆盖度、抗旱性、抗热性等生态适应性指标,作为评价其护坡效果的重要指标；并用环刀进行现场取样,进行大量含根土的直剪试验,测得含根土体的抗剪强度,与不含根土的抗剪强度进行对比,评判其根系固土能力.通过试验得出紫花苜蓿是一种适合东北地区公路边坡的理想的护坡植物.%This article takes Northeast Forestry University tree him as an experimental field. By planting Medicago sativa L., observes germination, growth rate, coverage, drought resistance .thermal resistance and other ecology compatibility indexes, and takes these as main indexes to evaluate slope protection effect. Using ring sampler to take soil samples which containing plant roots in site to carry on direct shear tests and gets shear strength. Compares these with soil samples without roots, and then evaluates preserving soil ability. According to experiments, it comes to conclusion that Medicago sativa L. is ideal slope protecting plant which is suitable for northeast area highway slope.