Research On Rapid Vegetation Restoration Technology Of Gneiss Mountain Land Slope

In this paper,aiming at the problems of soil erosion and landslides caused by the slope of developing the Taihang Mountain's gneiss,this paper selected the new reclamation slope of gneiss mountain in Wangpo Country Village,Pingshan County,Hebei Province as the research object,chosen Zoysia japonica,crown flower,Festuca rubra and Amorpha fruticose as the slope protection plants,single and mixed sowing were adopted in the field,by comparing the amount of vegetation growth,soil moisture content and the capacity of erosion resistance under different slope protection modes,a suitable vegetation restoration model was selected to provide datas supporting for the new land reclamation project vegetation protection technology in this area.The following conclusions were reached:?1?The difference of vegetation coverage on slope with different plant arrangement was great.After sowing in 120 days,the vegetation coverage was Amorpha fruticose's sample plot?95.3%?>crown flower and Amorpha fruticose's sample plot?91.3%?>crown flower's sample plot?82.7%?>Festuca rubra and Amorpha fruticose's sample plot?74%?>Festuca rubra's sample plot?65.7%?>Zoysia japonica and Amorpha fruticose's sample plot?55.7%?>Zoysia japonica's sample plot?40.3%?.After 6 months of growth,The below-ground biomass of Zoysia japonica,crown flower,Festuca rubra and Amorpha fruticose were 101.97 g/m^2?,196.83 g/m^2?,602.03 g/m²,1474.96 g/m².?2?Single factor analysis of soil water content in the surface layer of plant allocation model plot 16cm deep showed that the soil moisture content of slope decreased obviously after vegetation reconstruction,and the influence of different plant combinations on surface soil water content was significant.In the single plots,there were significant difference between the plots of planting Amorpha fruticose and other vegetation plots,and the difference was not significant between different plant mixed up,there was a significant difference between the mixed sowing and the single plots.?3?The difference of different plant arrangement on soil erosion resistance of surface soil is significant.The runoff coefficient of the sample plot of Zoysia japonica,crown flower,Festuca rubra,Zoysia japonica and Amorpha fruticose,crown flower and Amorpha fruticose,Festuca rubra and Amorpha fruticose were 15.06%,16.47%,10.07%,3.06%,15.15%,3.56%,8.35%,the contrast is lower than the slope for 2.05%,0.64%,7.04%,14.05%,1.96%,13.55%,8.76;The soil erosion modulus were102.24t/km²,89.47 t/km²,17.87 t/km²,2.44 t/km²,88.71 t/km²,2.92 t/km²,15.39 t/km²,the contrast is lower than the slope for 90.14 t/km²,102.91 t/km²,174.51 t/km²,189.94 t/km²,103.67 t/km²,189.46 t/km²,176.99 t/km².Using the fitting formula,simulated the root resistance of Zoysia japonica and Coronilla varia under the same root diameter condition,the root strength of Coronilla varia root system was higher than Zoysia japonica.But the root tensile strength of Zoysia japonica was higher than Coronilla varia.