Abstract
Vegetation selection is one of the key contents of slope ecological restoration, based on the characteristics of climate and soil in South China and the principle of local conditions, this paper studies the selection of vegetation in the ecological restoration project of the residual soil slope. The typical herbs, shrubs and trees suitable for the area are determined by theoretical analysis. At the same time, through field tests, the growth and development of vegetation after the spraying are monitored for a long time, and the interaction relationship between vegetation community after multiple vegetation mix-ups is analyzed. The results show that plant selection should avoid the choice of a single plant, and should try to achieve complementary coordination between species. At the same time, when taking a variety of plant mixing spray, the configuration ratio of different plants should be determined according to the growth cycle of different plants and the results of indoor ratio test, so as to avoid mutual interference.
Highlights
The construction of mountainous highway is often accompanied by a large number of high filling and deep excavation due to topography, forming many exposed engineering slopes
Because of the one-sided pursuit of economic benefits or technical limitations in the early engineering construction projects, most of the above exposed slopes were not treated with ecological restoration works, so that the original ecological system where the project is located has been damaged, and even lead to a large area of ecological degradation and aggravated soil erosion on the surface at the same time
The so-called slope ecological restoration technology refers to the artificial means to create a suitable substrate for vegetation growth on the slope surface, build a vegetation community adapted to the environment, and slowly restore the slope vegetation
Summary
The construction of mountainous highway is often accompanied by a large number of high filling and deep excavation due to topography, forming many exposed engineering slopes. In terms of plant screening methods, it is mainly based on empirical induction[3], analytic hierarchy process(AHP)[4] and other methods to comprehensively screen slope protection vegetation, such as Chen[5], Xie[6], Liu[7] pointed out that grass species such as Eragrostis, Bermuda grass, Bahia grass and ryegrass are ideal grass species suitable for local site conditions. The vegetation community configuration models explored and applied to slope ecological restoration at home and abroad mainly include: (1) herb mixed sowing; (2) herb and shrub mixed sowing;. There are a large number of highways in the mountainous areas of South China For this area, it has its own unique climate, soil and vegetation conditions. The selection of vegetation types in the ecological restoration of residual soil slopes has certain reference value
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