中文摘要：

以4年生4种内蒙古鄂尔多斯地区常见水土保持植物柠条、沙柳、白沙蒿和沙棘为研究对象,选取反映枝叶防风特性和根系特性的13项指标,即单株防风效能、林带防风效能、群落防风效能、直根抗拉强度、代表根本构特征、代表根弹性模量、侧根分支处抗拉强度、累计根表面积、拉拔摩阻特性、根-土界面摩擦系数、累计根长、根-土复合体粘聚力、根-土复合体内摩擦角,采用层次分析法对春季大风和夏季暴雨2种自然条件下4种植物枝叶与根系耦合固土抗蚀的差异性进行评价.结果表明：4种植物枝叶与根系耦合固土抗蚀指数为：春季大风条件下为沙柳（0.841）〉柠条（0.454）〉白沙蒿（-0.466）〉沙棘（-0.829）;夏季暴雨条件下为柠条（0.841）〉沙柳（0.474）〉白沙蒿（-0.470）〉沙棘（-0.844）.沙柳可作为研究区重要的防风抗蚀植物种之一;柠条则可作为研究地区重要的水土保持植物种之一.

英文摘要：

This paper took four kinds of common soil and water conservation plants of the study area, Caragana microphylla, Salix psammophila, Artemisia sphaerocephala and Hippophae rham- hides at ages of 4 as the research object. Thirteen indicators, i.e., single shrub to reduce wind ve- locity ration, shelterbelt reducing wind velocity ration, community reducing wind velocity ration, taproot tensile strength, representative root constitutive properties, representative root elasticity modulus, lateral root branch tensile strength, accumulative surface area, root-soil interface sheer strength, interface friction coefficient, accumulative root length, root-soil composite cohesive, root- soil composite equivalent friction angle, reflecting the characteristics of windbreak and roots, were chose to evaluate the differences of foliage-root coupling soil-reinforcement and anti-erosion among four kinds of plants by analytic hierarchy process （AHP） under the condition of spring gale and summer rainstorm, respectively. The results showed the anti-erosion index of foliage-root coupling was in the sequence of S. psammophila （0.841） 〉 C. microphylla （0.454） 〉 A. sphaerocephala （-0.466） 〉 H. rhamnides （-0.829） in spring gale, la （0.474） 〉 A. sphaerocephala （ - 0. 470 ） 〉 H. and C. microphylla （0.841） 〉 S. psammophi- rhamnides （ - 0. 844） in summer rainstorm. S. psammophila could be regarded as one of the most important windbreak and anti-erosion species, while C. microphylla could be the most valuable soil and water conservation plant for the study area.