The Application And Landscape Evaluation Of Evergreen Tree Species In Northeast Urban Greening

The construction of landscape architect in the world is the design by foliage, which can decontaminate atmosphere, regulate climate, remove dust, exterminate bacterium and reduce noises and so on , all above have an ecological effect on environment and supply a graceful amenity .With the proceeding of civic construction and the advance of civic development ,the effect of plant in landscape architecture is more and more important, the status of evergreen arborescence is the same, how to have the evergreen arborescence best applied to virescence , how to take the graceful effect, ecological effect, economic effect, cultural effect of evergreen arborescence are still needed to considerate.In this article, through investigating trees species, implantation way, especially analyzing the position and role of evergreen trees in whole expression result of scenery, application number, implantation way and scenery expression of evergreen trees in the greening construction are found. Based on investigations on the status of evergreen trees use, doing deep researches and analyses on urban plant landscape by LCJ (Law of Comparative Judgment), the ecological regulation that landscape designing should follow is discussed. Additionally, the joint of beautifying and ecological functions in evergreen trees use is found, which make landscape designing have relation with art, history, culture and architecture. With the help of this, we can discover more reasonable methods for landscape designing in urban greening construction.In addition, through the contrast of the situation of evergreen trees use and investigations on the applied number of evergreen trees and applied way, we find the evergreen trees varieties and its ratio relation and some excellent evergreen trees landscape, such as the campus of Shenyang medicine university, Renmin street in Changchun city, Northeast normal university, Northeast forestry university and so on. By the methods of mathematical analysis, we get excellent and poor landscaping method, and through contrast, this article find some problems that should be noticed in evergreen trees landscaping as well as this article brings forward some feasible resolutions.In Northeast China the climate character is cold and long wintertime. So how to solve the situation of lack of green plants and singleness of plant landscape in winter is one of important problem of improving the environment in northeast city. These years, with the development of evergreen trees resources and the introduction of foreign evergreen trees, more and more evergreen trees appears in gardens, but its applied situation is not very good. So we do a contrast for the application of evergreen trees in the three of capital city, in order to find problems and put forward feasible resolutions. At the same time, how to landscape scientifically and reduce the expenses of urban construction are also discussed in this article.