目前在一些高寒干旱的石质山区搞绿化十分困难。由于岩石裸露,山高坡陡,土层薄,干旱少雨,年年造林不见活,浪费了国家大量投资,又挫伤了广大山区群众造林的积极性,使山区生态环境日益恶化,影响当地农牧业生产水平的提 At present, it is very difficult to engage in afforestation in some alpine and arid stony mountainous areas. Due to the exposed rock, the steep slopes, thin soil layers, arid and rainy days and afforestation year after year, the State has wasted a lot of investment and dampened the enthusiasm of mass afforestation in mountainous areas to worsen the ecological environment in mountainous areas and affect the local agricultural and livestock husbandry production Horizontal mention