Ecological Evaluation And Optimization Of Road Greening Tree Species For In Tongchuan Town

Ordos is a national forest city and national ecological garden city, Tongchuan town in the Ordos City "East Gate", the greening level directly affect people’s impression of Ordos. How to better the construction of the town of Tongchuan ecological environment has become the Ordos City health healthy development of an important part. This paper mainly through to Tongchuan automobile city greening plants status investigation and study, put forward optimization and selection of plant species and for the development of Tongchuan town landscape and ecological environment improvement to provide scientific basis.Due to the arid and semi arid regions environmental conditions, climate characteristics, in road greening, trees, shrubs, grass, etc. to meet the drought, cold resistant features, and reasonable collocation of Joe, shrub and grass, the upper, middle and understorey plant community structure to configure. In arid, semi-arid area of tree species selection, not only to suitable for the local natural environment, but also has a rich landscape, role in improving the ecological environment, increase the ornamental and practicality of urban greening.There were 24 kinds of Ordos Tongchuan town urban road greening tree species, including evergreen tree species in five,11 species of deciduous broad-leaved tree species,8 species of shrub species, at the same time, and clover, Elymus dahuricus, alfalfa and other herbaceous plants. In road greening design build Joe, irrigation, grass composite plant community, extensive use of native tree species, and of some dominant species of introduction and domestication, greatly improving the survival rate of tree species, but also enhance the Tongchuan region economic, social and ecological benefits.Calculated according to the evaluation indexes of evaluation and grey correlation, as the road greening tree species, Platycladus orientalis grey is 0.8624, road green evergreen coniferous species, ecological benefit highest, Xinjiang poplar grey correlation is 0.9110, road greening deciduous broad leaved forest ecological benefit highest, elm Yemei association degree was 0.7576, road greening shrub species ecological benefit of the highest.