对森林后备资源的抚育工作,在建国初期,黑龙江省曾经采取过在次生林林区封山育林的措施,收效较好。之后,又在次生林林区建立国营经营林场,对次生天然林进行卫生伐和抚育伐,用人工促进更新的办法,恢复森林的再生能力。这项工作开始阶段,由于按照合理经营的要求,以抚育和营造为主,为实现 In the early days after the founding of the People’s Republic of China, the work of raising reserve resources for forests has taken the measures of closing hillsides and afforestation in secondary forestry and forestry areas and has achieved good results. After that, a state-owned forest farm was established in the secondary forest area to sanitize and tending the secondary natural forest and restore the regenerative capacity of the forest by means of artificial promotion of renewal. The beginning of this work, due to the requirements of reasonable management, to tending and construction-oriented, to achieve