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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Soil reinforcement capability of two legume species from plant morphological traits and mechanical properties
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Soil reinforcement capability of two legume species from plant morphological traits and mechanical properties

机译：从植物形态性状和力学特性看两种豆科植物的土壤增强能力

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摘要

Vegetation is an essential tool to reinforce soil and improve slope stability. Two legume species, lead tree (Leucaena leucocephala) and copperpod (Peltophorum pterocarpum), were tested in terms of their capacity for soil reinforcement using a modified laboratory shear box. In addition, morphological parameters of the plant and root tensile strength were measured, while root composition also was analysed. Root system significantly contributed to increase the shear strength and residual strength of soil. The soil-root matrix of both species significantly affected the cohesion but not the angle of friction. Overall effects varied with soil depth and plant species. Lead tree showed higher soil shear strength and residual strength compared to copperpod. It also exhibited higher root biomass, root length, fine roots, root tensile strength and concentration of cellulosic components in root than copperpod, indicating a higher contribution to soil-root matrix, soil shear strength and soil reinforcement. A positive correlation (r = 0.99) was observed between root biomass and soil shear strength of the species studied. Likewise, root cellulosic components and soil shear strength were positively correlated. Overall, lead tree exhibited exceptional root profiles and mechanical properties and can be the best suited plant for soil reinforcement.
机译：植被是加固土壤和改善边坡稳定性的重要工具。使用改良的实验室剪力箱测试了两种豆科植物铅树（Leucaena leucocephala）和铜荚鱼（Peltophorum pterocarpum）的土壤加固能力。此外，在测量植物形态参数和根系抗张强度的同时，还分析了根系组成。根系显着有助于增加土壤的抗剪强度和残余强度。两种物种的土壤根基都显着影响内聚力，但没有影响摩擦角。总体影响随土壤深度和植物种类而变化。与铜荚相比，铅树的土壤剪切强度和残余强度更高。与铜荚相比，它还表现出更高的根生物量，根长度，细根，根抗张强度和纤维素成分的浓度，表明对土壤根基质，土壤抗剪强度和土壤加固的贡献更大。所研究物种的根生物量与土壤抗剪强度之间存在正相关（r = 0.99）。同样，根纤维素成分与土壤抗剪强度也呈正相关。总体而言，铅树表现出出色的根部轮廓和机械性能，并且可能是最适合土壤加固的植物。

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