This study aimed to evaluate the ability of three shrubland species to consolidate slopes using root morphological traits and mechanical properties. The results showed that root tensile force increased and root tensile strength decreased with root diameter (from 0.3 to 5.5 mm) among all study species. Under the same level of root diameter, root tensile force and root tensile strength were highest for Amorpha fruticosa Linn. (AFL), followed by Swida alba Opiz (SAO) and lowest for Lespedeza bicolor Turcz (LBT). The mean branching ratio, root angle, stele to root diameter ratio, specific root length, individual length and surface area, and mean diameter of fine roots in different slopes were higher for AFL and SAO than for LBT, especially for high root orders (the third to fifth root orders). Furthermore, total hyphae length, total hyphae surface area, total hyphae volume, hyphae mean diameter, total glomalin-related soil proteins (GRSP), and easily extractable GRSP in different slopes also were highest for AFL, followed by SAO and lowest for LBT. However, root and mycelium traits had a positive effect on soil cohesion. These results suggested that root traits and mechanical properties of AFL and its impact on soil properties would enable more effective to consolidate slopes than SAO and LBT, revealing that planting AFL might be a better way for enhancing bioengineered slope stability in this study region.

中文翻译：

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三种灌木地树种的根系特征和力学特性：对生物工程边坡稳定性的影响

本研究旨在利用根系形态特征和力学特性评估三种灌木丛物种固结边坡的能力。结果表明，在所有研究物种中，根部张力随着根直径（从 0.3 到 5.5 毫米）增加而降低。下根直径，根拉伸力和根拉伸强度的同一水平最高的是紫穗槐属。(AFL)，其次是Swida alba Opiz (SAO)，最低的是Lespedeza bicolor图尔茨 (LBT)。AFL 和 SAO 的平均分枝率、根角、中柱根径比、比根长、个体长度和表面积以及细根平均直径在不同坡度中 AFL 和 SAO 高于 LBT，尤其是高根阶（第三至第五根阶）。此外，AFL 的总菌丝长度、总菌丝表面积、总菌丝体积、菌丝平均直径、总球藻蛋白相关土壤蛋白质 (GRSP) 和易提取的 GRSP 在不同坡度中也对 AFL 最高，其次是 SAO，LBT 最低。然而，根和菌丝体性状对土壤凝聚力有积极影响。这些结果表明，与 SAO 和 LBT 相比，AFL 的根系特性和力学特性及其对土壤特性的影响可以更有效地固结边坡，