对我区封山（沙）育林与生态建设问题的探讨武智双，马瑞清，马华芳封山（沙）育林是人们利用自然资源、自然力以及森林群落演替规律培育森林的一种重要手段。封山（沙）育林是将疏林、灌木林、荒山、荒沙、采伐迹地和火烧迹地地界封禁，限制开垦、樵采和放牧、禁绝山火，... Discussion on Closing Hillsides for Forest and Ecological Construction in Wu District WU Zhi-Shuang, MA Rui-Qing, MA Hua-Fang Afforestation (sand) afforestation is an important means of cultivating forests by utilizing the natural resources, natural forces and the law of forest community succession. Closing hillsides (sand) is forbidding forests, shrubbery, barren hills, waste sand, cuttings and burial sites, banning reclamation, firewood cutting and grazing, banning fires, ...