Research Of Suitability Of Landscaping Tree Species In Xilinhot

According to the city green grounds CJJ/T85-2002,we made a series of investigation, statistic,analysis and assessment for the popular vegetation type at the present.With comprehension of the city ecology,aesthetics of garden,and garden planning,and the regular pattern of ecology and vegetation,we made an over all Plan of the vegetation for the city,making the preparation for the beautification for the city.The main conclusion of this thesis as follow:(1) There are about 71 kinds of landscape trees in Xilinhot,among them 9 are evergreen trees,62 are deciduous;and among them there are 7 kinds of evergreen arbores,31 kinds of deciduous arbores,2 kinds of evergreen shrubs,29kinds of deciduous shrubs,2 kinds of lianas;(2) It indicates that numerous floral elements compose in the trees in Xilinhot through flora analysis.Two familes,including Rosaceae(7genera,20 species) and Oleaceae(3 genera 6species),which are considered as obviously advantage families in trees for urban landscaping,each accounting for 8.7%,25%,36.62%of total number of families,genera and species.(3)According to the results of the weight value of landscape trees by means ofAHP, the weight value of ecological adaptability is the most important part of landscape trees comprehensive evaluation index system and the ftrst choice of choosing landscape trees. View and admire capability is less important,which will be a considerable factor of choosing and using landscape trees.The last is growth capability,which shows that growth capability has least in fluence on comprehensive evaluation index system.The weight values of cold and frozen endurance,dryness endurance,high temperature endurance, coronal type and tincture in variable layer are obviously higher than the others.It can be regarded that those factors have important influence on the comprehensive evaluation of landscape trees inXilinhot.(4) The comprehensive index of each landscape trees can be calculated according to the weight value of various evaluations from AHP.With the distribution of various comprehensive indexes,four grades of landscape trees in Xilinhot can be determined.The results show that the number of first class trees is 22,the second is 27,the third isl2 and the fourth is10,all of them are graded according to their integral performance.