The Research On Plant Selection And Landscape Construction Of Road Green Space Based On Construction Of Urban Forest

As the fastest economic developmental and the maximum population density region, the ecological environment of cities come in for the extremely great challenge. Therefore, the environmental protection should be paid highly attention. Therein as a sort of natural recourses, the urban forest play a very important protecting part of ecological environment in the life and production of human beings. It can be not only the important environmental basis of Eco-city and urban suitable for living, but also the bridge of accomplishing harmonious existence between human beings and the nature. Urban forest is considered as a significant symbol of the modern civilized city. And the road forest-network can be an important part in the construction of urban forest, the construction of the road "Forest Network" not only prettified the entire city, but also make the great contribution to improve the living environmental quality of citizens.Changsha, the capital of Hunan province, is the political, economic and cultural center. Under the direct of the policy to construct "Urban Forest" and "Ecological City", the leaderships of this city pay much more attentions to build the ecological environment in order to create a route of reforming the image and enhancing the competitive power of it.Through studying the related concepts of the urban forest at home and broad, base on the method of choice and the demand of allocation, in the range of Changsha, the author of this paper made the spot check for the condition of growth of green belt plants in the 19 relief and main roads of this city, from the start of the distribution of tree DBH(diameter at breast height),tree stratum and five functions of urban forest, analyze the tree species composition and the health condition of urban forest thoroughly present the method of choosing plants in the street trees and the principle of plants allocation.On this basis, according to the present situation of the green areas on the road of Changsha, the author of this paper presents the reasonable and viable advice for constructing and optimizing. This measure has improved the quality of the road forest network of Changsha. This result not only make the important reference value and practical value of the urban forest construction in Changsha, but also provide the theoretical basis for other cities in Hunan Province's urban forest road forest network construction and ecological environment construction.