封山育林是恢复发展植被、扩大林地面积的重要途径。建国以来,我区在“普遍护林,大力造林”方针指导下,广泛开展了封山育林工作。50年代到60年代初,封育面积累计达到4300万亩。60年代中期后的“十年浩劫”曾使封育工作一度中断,并使部分封育成果遭到破坏。党的十一届三中全会以 Closing hillsides for afforestation is an important way to restore the development of vegetation and expand the area of ​​forest land. Since the founding of the People’s Republic, our region has carried out a wide range of work on closing off hillsides for afforestation under the guidance of the principle of “universal forest protection and afforestation.” From the 1950s to the early 1960s, the enclosed area totaled 43 million mu. The “10-year Holocaust” after the mid-1960s once interrupted the sealing work and damaged some of the sealing work. The Third Plenary Session of the Eleventh Central Committee