Study On The Selection And Disposition Pattern Of Greening Plants On Slope Of Beijing Expressway In Mountains Area

Expressway slope vegetation can make a slope more stability and reduces soil erosion and makes the slope more beautiful.In order to screen out the plant species suitable for high-speed slope greening in Beijing mountainous area,the interspecific association and correlation of plant species were calculated after investigation of Jingcheng Expressway(Phase III)and Jingkun Expressway slope vegetation,the basic characteristics of the plant are divided into different site types,using the analytic hierarchy process to establish different plant selection evaluation system for the corresponding site type,select the appropriate plant species,and get the allocation pattern.According to principal component analysis,the study area is divided into four types of site types.Each plant type has established a corresponding plant evaluation system to screen out suitable plant species.Combining the results of interspecific association analysis,reasonable configuration.The vegetation status of the Jingkunexpressway slope was investigated,and the plant growth and diversity index of the slope community were analyzed to verify the rationality of the plant allocation pattern,which provided some reference for the screening of the greening plant species in the mountainous area of Beijing.The results showed that:(1)There were 50 species of plant species,belonging to 45 genera and 23 genera,16%of the total population of the species of Compositae,10%of leguminous,Gramineae,and Rosaceae plants,respectively.The important value of the species was determined to determine the dominant plant species on the slope,and preliminary selection of plant species suitable for the greening of slopes in the Beijing mountainous region included 13 species of herbaceous plants and 19 species of woody plants.(2)Using the theory of mathematics and physics and chemistry,the study area was divided into four types of sites,and plant species suitable for greening of the highway slope in the Beijing mountainous area were screened for these four types of site types,and the plant species with positive correlation between species was selected.Different types of plant configuration patterns are derived.(3)The recommended plant species and configuration model for slope greening of Beijing-Kunming Expressway will be used.After one year of growth of the slope plant species,the average coverage is 76.87%and the average height is 94.40cm.The abundance,species diversity index and evenness index of plant communities on the slope are slightly lower than those of the surrounding natural environment.The indicators such as coverage,bush number ratio and coordination with the surrounding landscape have reached the goal of the project greening design,so the plant species and configuration model can meet the high-speed slope greening requirements in the Beijing mountainous area.