A Study On High Altitude And Cold Mountainous Region Slope's Vegetation Restoration Of Ya'an-Lugu Expressway

In the high altitude and cold mountainous region, due to harsh environmental conditions, recovery the natural vegetation that damaged in the process of expressway construction is difficult. But the vegetation system recover, especially the expressway slope vegetation restoration plays an important role in keeping the local ecological environment. At the present time, the research about high altitude and cold mountainous region expressway slope's vegetation restoration is lack, so it is very meaningful to research.In the high altitude and cold mountainous region of Ya'an-Lugu expressway,compare with low altitude or warm area, vegetation restoration's difficulties come from to the climate factors, geographical factors, slope conditions, such as plants resources. Through to improve the highway slope greening techniques of the hills, mountainous aream choose the suitable measures to local conditions, and through the experimentation of planting filtration suitable slope plants, and apply in the slope greening construction practice,to obtained better effect of vegetation recovery, solve the high altitude and cold mountainous region vegetation restoration's difficulties such as plants overwintering, hard to restoration vegetation on sand with stone steep slope and some other problems, worked out a set of effective high altitude and cold mountainous region expressway slope vegetation restoration and construction technology. Summarize how to choose the appropriate plants and engineering method in order to obtain a better effect of greening and vegetation restoration effect:(1) According to the local climate, soil, geological conditions, selection the plants which can growing well in the adverse slope environment, take the correct vegetation restoration and construction technology, and choose the reasonable planting construction time, to create a favorable slope vegetation restoration conditions, to choose the suitable measures to local conditions, in order to recover the slope as soon as possible the purpose.(2) Pay attention to short-term greening effect, but should pay more attention to the long-term effect of vegetation recovery. To minimize the use of exotic species, and use the local species who are adapt to the local environment as much as possible. Local species introduction and invasion of the slope, can formed stability slope plant community system that do not have much difference form local plant community system, reduce expressway's artificial marks, formation harmonious landscape effect. After a few years,when the maintenance intensity is greatly reduced, can still turnover naturally, gradually adapted to the low maintenance even non-maintenance, to achieve real vegetation restoration.(3) Improved plant cultivation technology. Development the applicable slope construction technology and cultivation methods that suit local environment conditions, can make the maximization vegetation restoration, construction environment benefit and economic benefit.