On Disposition Of Afforestation For Freeway Construction

When the freeway construction brought huge economic and social benefits to human beings, it also made a great harmful impact to ecological environment along the line. In order to eliminate the demolishment, the freeway greening had been an important part of the freeway construction.The essential of freeway afforestation is the ecological recovery engineering actually. Being the premise and main physical foundation to the ecological recovery, plants selection is very crucial, which decides freeway afforestation is whether or not successful. However, lots of problems exit in the current afforestation designing. For example, the original ecological environment is always ignored, species diversity is less considered, native species are not being applied extensively, the research on adaptability of exotic species is absent. Therefore, plants selection needs to be perfected and standardized urgently.Regarding the ecological theory as guidelines, considering the traffic function and landscape synthetically, this thesis researches the question more systematically and deeply from seven aspects, which include selecting the local plants preferentially, choosing exotic plants scientifically, improving biodiversity, soil adaptability, maintenance management facility, the afforestation function analyzation, easy seedlings acquisition and economic feasibility.Based on Suizhou-Yueyang freeway construction, according to above principles, the methods to choose plant species scientifically on freeway side slopes, interchanges, central reserve, and service area are discussed detailedly. Moreover, this thesis proposes some improved suggestions to the original afforestation engineering design. After choosing suitable plant species, plant disposition becomes another key element, which affects ecological function and landscape value directly. Therefore, it's better arrange plants following corresponding principles, such as niche, mutualism and biological diversity and so on, so as to utilize resources completely and maximize the compehensive benefit of green space system.The main purpose of freeway afforestation is to protect, improve and restore the original eco-environment, but in current afforestation project, many factors restrict the realization of this target. As the foundation of the other work, plant selection perfection will promote the further research of other factors and realize the sustainable freeways development together.