The Application Analysis And Comprehensive Evaluation Of The Main Greening Trees Of Jincheng

Urban landscaping plays an important part on ecological balance and landscape treatments.In this paper,based on a large number of related literatures,the stratified random sampling survey method was used to investigate to the application of the greening trees of Jincheng.Then the Delphi method was used to comprehensive evaluation and classification to the main greening trees.On this basis,the problems was found out and the suggestion was put forward which would be a reference of the future greening trees application of Jincheng.The results show that:(1)There were 104sprcies in 73 genera and 33families in Jincheng.The species of deciduous trees were 87 and the proportion of the whole trees was 64.42 percent.The tree species were 57 and the proportion of the trees and shrubs were 1:0.74.The species of hardwood were 96 and the proportion was 92.31 percent.The native tree species were 67 and it was 2 times of the exotic trees.At the same time,the greening trees of Jincheng were mainly distributed in Rosaceae and the proportion was 23.08 percent,followed by a number of subjects,such as Leguminosae,Pinaceae and Salicaceae.(2)The composition,species,source and life type of the greening trees of four greenbelt types were investigated.The results showed that the greenbelt which has rich tree species selection was the garden greenbelt and ecological greenbelt.Among the two,the trees and shrubs were rich,the evergreen trees and deciduous trees were diverse and the native trees and exotic trees were also rich.But the tree species of street greenbelt was relatively less.(3)The frequency of the greening trees of Jincheng were Salix babylonica,Sabina chinensis,Sophora japonica,Populus tomentosa,Lagerstroemia speciosa,Buxus sinica,Euonymus bungeanus,Berberis thunbergii,Ligustrum vicaryi,Rosa xanthina,Parthenocissus tricuspidata and Hedera nepalensis.All these trees constituted the main trees of Jincheng.In addition,the richness index and diversity index of the different greenbelts was all performance of article greenbelt,garden greenbelt and street greenbelt.The trees of the two index was the highest,the shrubs was the second and the vines was the last.(4)The comprehensive evaluation and classification of the main greening trees was got.The lever of the first was 5,such as Salix babylonica,Sophora japonica,Sabina chinensis,Buxus sinica,Syringa oblate which was the backbone trees of Jincheng.The lever of the second was 8 and the lever of the third was 23,such as Ailanthus altissima,Prunus cerasiferacv,Pinus tabulaeformis,Lagerstroemia speciosa,Sorbaria sorbifolia,Spiraea salicifolia,Wisteria sinensis which were widely used in Jincheng.The lever of the fourth was 6,such as Cerasus yedoensis,Magnolia denudate,Jasminum nudiflorum and Ampelopsis sinica which provided more selections of the greening trees of Jincheng.