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In order to optimize and select the plants which are suitable for highway slope, this paper chose the vegetation on Guanghe Highway as the research object to carry out the study on how to select plants for highway slope. Based on the experiment of cultivating eight different kinds of subshrub plants which grows well in local environment, this research was to evaluate the adaptability of the plants species by using Analytic Hierarchy Process. The results revealed that Crotalaria pallida Ait, Cajanus cajan (Linn) Millsp, and Tephrosia candida performed the best among the eight kinds of shrub plants, with a better ecological suitability and function of slope protection. Indigofera amblyatha and L. Davidii Franch were the second. Rhodomyrtus tomentosa Ait and Hypericum monogynum Linn were the worst. Therefore, we suggest that Crotalaria pallida Ait, Cajanus cajan (Linn) Millsp and Tephrosia candida should be the preferred choice for slope protection plant for Guanghe Highway. The result of this research can serve as a theoretical foundation and technical support for the highway vegetation construction of Guangzhou and subtropical area.

Research on Species Ecological Adaptability of Shrub Vegetation of Highway Slope