“三北”防护林工程是在中国三北地区(西北、华北和东北)建设的大型人工林业生态工程,是中国跨世纪生态建设的重要项目。工程规划期限为70年,分七期工程进行,目前正在实施第五期工程建设。自1978年“三北”一期工程启动至今,新疆“三北”防护林工程建设至今已走过39年的发展历程,“三北”防 The “Three Norths” shelterbelt project is a large-scale artificial forestry ecological project constructed in the Three North regions of China (northwest, north and northeast) and is an important project for the cross-century ecological construction in China. The project planning period is 70 years and is carried out in seven phases. The fifth phase of the project is currently under construction. Since the start of the “Three Norths” Phase I Project in 1978, the development of the “Three Norths” shelterbelt project in Xinjiang has now gone through 39 years of development, and the “Three Norths”