Study On Plant Restoration Of Perturbation Side Slope In Karst Region

The paper, with a special reference to perturbation side slope of expressway in karst region of Guizhou, selects the representative ecosystem with different side slope in those various highways which are Guixin highway, Guizun highway, Guihuang highway, and so on, and obtaines the monitoring data for summer and winter these two periods from 2005 according to the fifty-three fixed monitorings in the research section. And drew the relevant section for these 53 fixed monitorings(see appendix 1).The paper investigates and monitors the changing course of vegetation of perturbation side slope of expressway in karst region by the means of consulting date, ecological dynamic monitor and experiment, and quantitatively analyzes the natural repairing course of vegetation of side slope of expressway in karst region by the mean of combining space with time.This paper mainly includes the contents as follows:(1)the study on classification of perturbation side slope in karst region;(2)the speed of natural recovery of the vegetation of perturbation stone side slope under different categorised conditions;(3) the speed of natural recovery of the vegetation of perturbation soil side slope under different categorised conditions;(4)the comparison of plants growing in perturbation slope and natural slope;(5)the suitable performance of perturbation slope.(6) the discussion of mathematical model of Influence factor of perturbation slope.The conclusions can be drawn as follows:1 Classified conclusion: According to lithological character side slope will be divided into stone perturbation slope and soil perturbation slope; according to the soil's and rock's condition side slope will be divided into…the dolomite side slope and the limestone side slope; according to the relations of slope face and the occurrence of rock layer in the perturbation slope side slope will be divided into thin layer rock side slope, thinly to heavy film rock side slope and heavy film rock side slope; according to the occurrence of rock layer side slope will be divided into obliquely slope, obey-slope and reverse slope; according to slope side slope will be divided into gentle slope, pitch, steep slope, extremely steep slope.2 The vegetation restoration of road side slope is mainly related to the following factors:Lothological factor: In the spatial criterion, the soil side slope's restoration situation is better than the stone side slope.Rock layer occurrence factor: The situation of the side slope's vegetation restoration is the obliquely slope > the reverse slope > the obey-slope.Slope condition factor: The slope's influence is that, the situation of the side slope's vegetation restoration is gentle slope > pitch > steep slope > extremely steep slope.Soil and rock factor: The situation of side slope's vegetation restoration is dolomite side slope > limestone side slope; thinly to heavy film rock side slope > thin layer rock side slope > heavy film rock side slope.The research proposes the soil side slope's vegetation restores well, may carry on the naturul restoration; The vegetation of gentle slope and pitch with big roughness of the stone side slope restores good , may carry on the naturul restoration; Regarding to the steep slope, the extremely steep slope, the obey-slope, and the small roughness side slope, ther may be planted the vegetation extremely to carry on the slope protection suitably.