青海省林业用地总面积的53.2％为灌木林地。在灌木林地中,分布于海拔3000米以上的高山灌木林地占三分之一以上。高山灌木林地,有保持水土,涵养水源的作用,也有不少经济植物,但是由于温度低,湿度大、生长期短,生产力是很低的。因此,将经济价值不高的灌木林地改造成为乔木林分,对提高土地的生产力,有着重要的现实意义。 53.2% of the total area of ​​forestry land in Qinghai Province is shrub land. In the shrubbery, the alpine shrubbery that covers an area of ​​3000 meters above sea level accounts for more than one third of the total. Alpine shrubbery, there is to maintain soil and water, water conservation role, there are many economic plants, but due to low temperature, humidity, short growth period, the productivity is very low. Therefore, to transform the shrubbery land with low economic value into the arbor forest stand has an important practical significance to improve the productivity of the land.