“三北”防护林体系建设是国家一项改造自然的巨大工程。青海是“三北”防护林体系建设的重点省(区)之一。据青海省1978—1985年林业发展规划(初稿),东部浅山地区的造林任务占全省造林总面积的近三分之二。保证质量按时或提前完成这一任务,从而增加这一地区的森林覆盖率,对于控制水土流失,改变生产条件,促 The construction of the “Three Norths” shelterbelt system is a huge national project to transform nature. Qinghai is one of the key provinces (districts) in the “Three North” shelterbelt system construction. According to the plan of forestry development from 1978 to 1985 in Qinghai Province (preliminary draft), afforestation in the eastern part of the shallow mountains accounted for nearly two-thirds of the total afforestation area in the province. Ensure quality to accomplish this task on time or ahead of schedule, thus increasing forest cover in the area, controlling soil and water loss, changing production conditions and promoting