Study On The Restoration Of Uncovering Slopes Of Freeway And Its Mechanism

The Freeway is the areas of population center, be closely bound up people's healthy and traffic safety. The restoration of vegetation for Freeway slope has an important impact on Improvement of the ecological environment, Landscaping and Improving traffic safety.Through the study on the restoration and soils of the road sections K8-K30 km in KunQu Freeway, the paper first appling the ecology research methods to the study on the restoration of freeway uncovering slopes, revolutionary presentation on the mechanism of restoration, which can supply scientific academic basis for freeway landscaping. The results were as follows.In the K8-K30 km road sections of KunQu Freeway, there were 53 families, 115 genus and 148 species on the restoration slopes, with an increase of 130 plant species beyond 1996's reconstruction species. The increase species be comprised of Compositae family, Leguminosa family and Graminea family, and formed six typical plant communities including Eragrostis pilosa, Arthraxon hispidus, tall Festuca, Acroptilon repens(L.)DC, Setaria viridis and Herba Bidentis Pilosae. The diversity and stability order of above six communities was Eragrostis pilosa >Arthraxon hispidus >tall Festuca > Acwptilon repens(L.)DC>Setaria viridis>Herba Bidentis Pilosae. In addition to tall Festuca communities, the other communities were in the aggregated distribution state.Through the study on the niche, the author found that Herba Bidentis Pilosae taked up the greatest niche and had the strongest Competitiveness, being followed by Acwptilon repens(L.)DC, Eupatorium adenophorum, Setaria viridis, Medicago sativa L., tall Festuca, Red Clover and so on. It was showed that vegetation communities in the KunQu freeway slopes were at the state of dominant period.of foreign invasion species.In the K8-K30 km road sections of KunQu Freeway, the species richness and the stability of the...