黄土地区高速公路边坡柠条生长特征及其护坡效应研究

Research on Growth Characteristics and Slope Protection of Caragana korshinskii of Highway Slope in Loess Region

探讨了黄土地区大（同）—呼（和浩特）高速公路边坡柠条（Caragana korshinskii）生长特征和护坡效应。结果表明，随着柠条苗龄的增加，地上茎、叶部分生长逐渐减缓，地下根系部分生长逐渐加快，根系密度主要集中于0～30cm 土层；柠条根－土复合体抗剪强度主要体现在0～40cm 土层，随着柠条根系直径增加，其抗拉力和抗拉强度也不断增加。

The growth characteristics and slope protection of Caragana korshinskii on slopes of Datong-Hohhot highway in Loess region were studied. The results showed that,with the growth of Caragana korshinskii,stem and leaf grew slowly,root growth gradually increased,and root system mainly distributed in the soil layer from 0cm to 30cm; shear strength of root-soil composite for Caragana korshinskii mainly reflected in the soil layer from 0 to 40 cm,and the tensile strength of Caragana korshinskii root increased with its diameter.