STUDY ON THE FACTORS INFLUENCING THE HYDROLOGICAL EFFECTS FOR SLOPE PROTECTION OF FIVE SHRUBS AROUND XINING BASIN

Five shrubs planted for five years in the testing areas were studied.They are Caragana korshinskii,Zygophyllum xanthoxylon,Nitraria tangutorum,Atriplex canescens and Lycium chinense.Through the observation of the up-ground growing increment and the statistics results of the five shrubs,the factors influencing the hydrological effects for slope protection were explored.The results show: the up-ground growing increment of shrubs have an effect on their hydrological effects and the slope protection; plant height and diameter have different effects on the shrubs hydrological effects,and although the shrubs have the same growing period,their influences about their up-ground growing increment on the effects of both hydrological and slope protection are quite different.The study helps to choose the kind of shrubs which have better effects in the hydrological effect and slope protection.