| Planning of tree species is one of the important components of urban green space system planning.Scientific and reasonable tree species planning could realize the sustainable development of urban landscaping and greening,making urban green space system planning play a role in guiding the construction of urban green space and improving urban greening benefits effectively.Based on the general research of Kunming and the study and investigation of the application status of landscape tree species in Kunming,this thesis plans the landscape tree species of Kunming scientifically and rationally through the analytic hierarchy process.Applying the AHP to the field of tree species planning,the introduction of quantitative analysis methods can improve the subjectivity of qualitative analysis effectively when selecting tree species in the past,achieving objectivity,science and rationality.This research can provide reference for planning of tree species in other cities.Main research results of this thesis are:1.The principles of tree species planning of Kunming and the geographical location of plants in Kunming were determined.Six technical and economic indicators were planned.2.A hierarchical structure of tree species planning in Kunming was constructed,of which the weights of each elements were determined by AHP based on the results of the questionnaire survey.Among the planning factors,the weight of growth adaptation is 0.361,ornamental effect is 0.238,ecological function is 0.202,social benefit is 0.113,and economic factor is 0.086.The first three items with the largest weight value in the evaluation index are cold resistance,drought resistance,and regional characteristics.3.Based on an investigation of the application status of 50 planned tree species,each landscape tree species was comprehensively scored according to the established ten-point scoring standards of 26 evaluation index and comprehensive score function of tree species planning in Kunming.Therefore,according to the comprehensive score of 50 landscape tree species,the top 4 Machilus yunnanensis,Celtis kunmingensis,Cinnamomum glanduliferum and Cerasus cerasoides were selected as the fundamental tree species of Kunming.A total of 20 tree species including Pistacia chinensis,Lirianthe delavayi,Parakmeria yunnanensis,Pistacia weinmanniifolia,Photinia glomerata,Koelreuteria bipinnata,Cornus capitata,Liquidambar formosana,Cerasus cerasoides var.rubea,Albizia mollis,Paulownia fortunei,Firmiana simplex,Manglietia insignis,Ginkgo biloba,Pinus armandii,Sladenia celastrifolia,Malus halliana,Osmanthus fragrans,Acer paxii and Catalpa fargesii f.duclouxii in the top 24 were selected as the backbone tree species in Kunming.At the same time,the whole process from determining the weight of the evaluation index to obtaining the comprehensive score of landscape tree species,the Excel calculation template established is convenient and practical.4.276 general tree species were planned,at the same time the landscape plant list for tree species planning in Kunming was completed.It is recommended that Machilus yunnanensis and Cerasus cerasoides be the city trees of Kunming.5.This thesis conducted classified tree species planning for urban green space of Kunming,and planed the corresponding fundamental tree species,backbone tree species and general tree species of the park green space,protective green space,square land,auxiliary green space and regional green space separately.Finally,suggestions were made on the tree species planning of Kunming. |
