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合理地进行封山封沙育林育草,能加速植被再生产的自然过程,恢复和扩大植被覆盖度,是用少量的物化劳动和活劳动消耗取得大量森林资源的重要途径。锡林郭勒盟解放初期只有20万亩天然次生林。后经封山育林,到1975年天然次生林面积发展到75.5万亩,平均每年增加2万多亩。25年扩大的森林面积相当于同期全盟造林保存面积的5倍多。有些林场的效果更好。例如,宝
It is an important way to obtain a large amount of forest resources with a small amount of materialized labor and live labor consumption by reasonably carrying out sealing and sand-cutting and afforestation and grass-raising, which can accelerate the natural process of vegetation reproduction and restore and expand the vegetation coverage. Xilin Gol League liberation of only 20 million mu of natural secondary forest. After the closure of Hillsides, to 1975 natural secondary forest area developed to 755000 acres, an average annual increase of 20000 acres. The forest area expanded in 25 years is equivalent to more than five times the area reserved for afforestation in the same period. Some farms work better. For example, treasure