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.

青海是一个聚居的地区，属于典型的高原大陆性气候，具有干燥、少雨、、冷、日照时数长等特征。

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.

摘要 ： 在干旱或荒漠地区造林，降雨稀少，大，加之人力、物力的贫乏等原因，导致造林成活率低。