Investigation And Analysis Of The Structure Of Landscaping Tree Species In Xiaoyi City

With the vigorous development of urban construction,urban landscaping construction is also in full swing,and the selection and configuration of tree species in urban landscaping plays an important role in the establishment of urban ecosystem and the improvement of landscape effects.This paper investigates the composition,quantity and application of tree species in 33 main urban roads,5 large park squares and 35 small street gardens in Xiaoyi City.Through the summary statistics,the composition,application quantity and application frequency of each tree species are analyzed.Life style and source structure,the conclusions of the study:1.There are 49 families,86 genera and 144 species in the urban built-up area of Xiaoyi City.Among them,there are 13 species of 8 genera and 4 genera of gymnosperms,and 131 species of 78 genera and 45 families of angiosperms.Among all angiosperms,dicots are dominant.2.Among the three types of trees used in landscaping in Xiaoyi City,the application frequency and application number of arbor species are the highest.The number of applications and application frequency of the three types of tree species are comprehensively analyzed,and the main tree species of landscaping in Xiaoyi City are obtained.The main arbor species are Sophora japonica,Salix matsudacernegundo,Populus tomentosa,Pinus tabulaeformis,Amygdalus persica,Pinus bungeana,Robinia pseudoacacia,Prunus Cerasifera,Fraxinus chinensis;the main shrub species are Syringa oblate,Hibiscus syriacus,Syringa oblata var.alba,Forsythia suspense,Amygdalus triloba,Swida alba,Ligustrum obtusifolium,Rosa xanthina,Weigela florida,Sorbaria sorbifolia,Amygdalus triloba,Lagerstroemia indica;the main tree species in the hedge are in turn,Euonymus kiautschovicus,Ligustrum vicaryi,Berberis thunbergii var.atropurpurea,Rosa chinensis,Amorpha fruticosa,Sabina procumbens,Euonymus maackii,Buxus megistophylla,Yucca gloriosa,Canna indica,Rosa bella Rehd.3.There are 88 species of landscaping arbor trees in Xiaoyi City and 39 species of shrub species.The proportion of landscaping trees in Xiaoyi City is 6.9:3.1.The amount of arbor species was 478,000,the amount of shrub species was 163,000,and the ratio of trees to shrubs was 7.5:2.5.4.The ratio of evergreen to deciduous trees in the landscaping of Xiaoyi City is 1.3:8.7.The ratio of evergreen to deciduous tree species in arbor species is 1.4:8.6,the ratio of evergreen deciduous tree species is 1.9:8.1;the ratio of evergreen deciduous tree species in shrub species is 0.5:9.5,and the ratio of evergreen deciduous trees is 0.2:9.8;hedgerow species The ratio and ratio of the evergreen deciduous trees in the middle are 2.5:7.5 and 4.9:5.1,respectively.5.There are 80 kinds of native species in the landscaping tree species in Xiaoyi City,accounting for 55.56%of the total tree species.The domesticated species ranks second among all tree species,with 40 species,accounting for 27.78%of all tree species,followed by naturalized species.There are 16 species,accounting for 11.11%,and the least exotic species,with 8 species,accounting for 5.56%.