1.Abstract: Qinghai is a multi-ethnic-populated areas with the typical plateau continental climate such as drying, less rain, windiness, cold, long sunshine hours and so on.
青海是一个多民族聚居的地区,属于典型的高原大性气候,具有干燥、少雨、多风、寒冷、日照时数长等特征。
2.Abstract : In dry area or sandy dryland, for the reason of scarce rainfall, windiness and lack of labor power and material resources, the low survivor ratio of afforestation were common.