Analysis of Plant Community Characteristics of Neyraudia reynaudiana in Highway Slope After 20 Years of Slope Greening

In this study, the characteristics of Neyraudia reynaudiana community in the slope of Pingxi Highway were compared by the sample plot investigation after 20 years of slope greening.The slope is located on the east side of the highway between Leigongshan Tunnel and Deifushan Tunnel in Dapeng New Area, Shenzhen.In the process of slope greening, the wire mesh was used as the bottom layer, and then sprayed with the soil and the seeds of Neyraudia reynaudiana.The results show that:After 20 years of restoration, the plant species of the slope became more abundant, increasing from 1 species to 48 species, belonging to 30 families and 44 genera.According to ecotypes, the 48 plants could be divided to 26 heliophyte species, 10 sciophyte species, and 12 neutral plants.The plant species composition of the slope became more complex.The plant community had developed from a single species community of Neyraudia reynaudiana to a complex plant community which included Neyraudia reynaudiana as dominant species, other 47 natural regenerated plants were associated species, such as Melastoma candidum, Rhus chinensis, Melastoma sanguineum, etc.The plant community of the slope changed from a single layer structure to four layer structure.The diversity of woody plants was significantly higher than that of herbaceous plants, so it was conducive to the stable development of slope vegetation.