| The urban road green space plant configuration is the main task of urban greening.The optimization of road greening tree species selection and plant allocation mode is an effective means to develop road greening [1].This study takes the urban road green space of Changzhi City as the research object,and conducts on-the-spot investigation on 32 main sections of its main road,secondary trunk road and branch road,records the vegetation types,plant allocation patterns,road green soil,etc.of each sample strip.Happening.Using the analytic hierarchy process,the plant species of road green space in Changzhi City were screened and their plant allocation patterns were evaluated.The selection of tree species,the evaluation results of plant configuration patterns and the physical and chemical properties of road greenbelt in Changzhi City were combined to optimize the plant allocation pattern of road green space.The main results are as follows:1.Through field research,it is found that there are 27 families,51 genera and 75 species commonly used in road greening in Changzhi City.Among them,Rosaceae and legumes are used most.Organizing and summarizing the greening allocation mode of 32 roads,it is concluded that there are 8 roads for road greening in Changzhi City using the arbor-shrub-hedge-herb configuration mode,such as Taiyue West Street,Zijin East Street,etc.;using trees-shrub-tree hedges There are 8 roads in the model,mainly in Xihuan Road and West Street;there are 4roads of arbor-shrub-herb greening pattern,such as Baoning West Street,Wuzhen Street and Fengxiang Road;The greening mode of arbor-shrubs includes two roads,Fuxi West Street andTsinghua Street;the greening mode roads of trees and hedges include Huaihai West Street,Heping East Street and Xiangyangmen South Road;and 4 roads are only planted with trees,among which All three are branch roads.Based on the analysis of the physical and chemical properties and fertility index of road greenbelt in Changzhi City,it is found that the road green soil in Changzhi City is relatively barren,belonging to saline-alkali soil.In addition,there are 4 roads with high soil bulk density and 5 roads with low soil organic matter content.2.Using the analytic hierarchy process to evaluate the plant species currently used in Changzhi City from five aspects: ornamental benefit,growth adaptability,ecological benefit,economic benefit and cultural benefit,and obtain the backbone tree species and key tree species of the road greening tree species in Changzhi City.General tree species.From the four aspects of ecological suitability,community stability,landscape function and protective function,the plant allocations of 32 roads in Changzhi City were scored,and the problems in tree species selection and plant allocation in Changzhi City were summarized.Suggest.3.Based on the results of soil analysis,the road greening tree species and plant allocation patterns in Changzhi City were optimized.On the basis of the original plant species,28 kinds of plant species suitable for road greening in Changzhi City were added,including 12 kinds of backbone trees and 1 species of key tree species.There are 9 kinds of green plants and 6 kinds of herbs.The optimization model of road greening plant configuration is proposed,in which there are 9 kinds of intermediate sub-cars,8 kinds of side-by-side sub-cars,and 10 kinds of street trees with 27 kinds of optimization modes for garden designers.4.Based on the survey and assessment results of road green space in Changzhi City,five urban roads were selected to analyze and discuss their current status,and to carry out practical work on road greening plant selection and configuration mode optimization. |
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