更新造林是林业扩大再生产的手段,是发展林业的根本途径。牙克石林管局规划到本世纪末,振兴林业的四个战略目标之一就是要将森林覆盖率由目前的60％,提高到70％;年更新造林面积由50万亩,增加到100万亩;有林地面积由628万公顷,增加到728万公顷。牙克石林区从1954年至1980年更新造林总面积为33万公顷,1981年调查,成材面积仅为 Reforestation is the means by which forestry expands reproduction and is the fundamental way to develop forestry. Yakeshi Forest Bureau Planning By the end of this century, one of the four strategic objectives of rejuvenating forestry is to increase the forest coverage from the current 60% to 70%; and the annual reforestation area will increase from 500,000 mu to 100 mu The area of ​​forest land increased from 6.28 million hectares to 7.28 million hectares. Yakushi Forest area from 1954 to 1980 a total area of ​​330,000 hectares of afforestation, 1981 survey, timber area only