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，风多且风大，加之人、的贫乏等原因，致造林成活率。

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.

是一个多民族聚居的地区，属于典型的高原大陆性气候，具有干燥、少雨、多风、寒冷、日照时数长等特征。