Investigation And Evaluation On Plant Allocation Of Road Greenbelt In Luoyang City

With the rapid development of the city,people pay more and more attention to the green landscape of the urban road,selecting plants which are suitable for the green space of the urban road to build a stable community system of green plant and create beautiful green space.The innovative research on the green landscape of the urban road has high research value and practical significance for future construction of road greening.This study takes 15 roads in Luoyang as the research object,investigating green spaces of 15 roads,recording the basic information related to plant species,analyzing the survey data about the characteristics of the artificial plant community,and using the analytic hierarchy process to evaluate the green space of the urban road.Combining the plant disposition pattern of road green belt in Luoyang City,this paper discusses the problems existing in road greening of Luoyang City and puts forward corresponding optimization suggestions.The main research results of the thesis are as follows:(1)There are 55 kinds of plants mainly used in road greening of Luoyang City,involving 35 families and 50 genera.Among them,deciduous trees have 14 families,17 genera and 18 species,accounting for 32.73% of arbor plants.There are 6 families,8 genera and 8 species of evergreen trees,accounting for 14.55% of arbor plants.Among them,deciduous shrubs have 7 families,9 genera and 9 species,accounting for16.36% of shrub plants,14 species of 13 genera and 12 families of evergreen shrubs,accounting for 25.45% of shrub plants.There are 6 kinds of herbaceous plants,involving 5 families and 5 genera,accounting for 10.91% of the total.(2)The road greening in Luoyang City is mainly deciduous plants,and the application of evergreen plants is less.The deciduous plants are mostly in the Rosaceae family;the evergreen plants are mostly in the Pinaceae and Oleaceae family.Evergreen trees and deciduous shrubs have fewer plant species and need to increase plant species;there are few species of herbaceous plants,and the frequency of application of herbs and vines should be increased to increase the importance of road greening.(3)Based on the analytical results of plant application frequency and quantity characteristics,the widely used plants in road greening of Luoyang City include threeball sycamore,ginkgo,purple leaf plum,heather,big leaf boxwood,lobular privet,safflower sorrel and other plants.(4)Analysis of plant ornamental characteristics starts from the points of observation factors and seasonal changes.Most of the road greenbelt plants in Luoyang City are mainly foliage plants,following by flower-viewing plants,and fewer fruit-seeking and ornamental plants.In the point of seasonal changes,the flowerviewing plants are mainly concentrated in spring and summer,and less in autumn and winter.The plant landscape is monotonous and the overall plant landscape effect is not ideal.(5)Plant disposition method according to the vertical structure analysis of road green belt,among the 15 roads in Luoyang City,the planting form of the green belt of the roadway is mainly tree pool type,and the vertical structure is mainly composed of single-layer arbor configuration,accounting for 71.74%;the vertical structure of the green belts on both sides is mostly in the form of trees and shrubs,accounting for64.71%;the vertical structure of the green belt in the middle is mostly composed of trees and shrubs,accounting for 54.55%.And he vertical structure is all in the form of trees,shrubs and herbs.(6)The analytic hierarchy process is used to evaluate the landscape of 15 roads.The comprehensive evaluation results are: one grade road landscape has oneroad with a proportion of 6.67%;two grade road landscape has three roads with a proportion of20%;three grade road landscape has seven roads with a proportion of 46.67%;four grade road landscape has four roads with a proportion of 26.67%.(7)Based on the current situation of 15 roads and the results of comprehensive landscape evaluation,the advantages of road green space plant allocation in Luoyang City and the three problems in plant configuration were summarized,and optimization suggestions were proposed to provide certain conditions for the construction and development of road green space in Luoyang City in the future.Reference.