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传统木材采运只利用树干,约占整个树木的60～70%。遗留林内的带叶和皮的梢头枝丫占20～25%,伐根占10～15%。世界上可利用的森林资源已经不多,受土地的限制,扩大森林资源较为困难。
Traditional timber harvesting uses only the trunk, accounting for about 60 to 70% of the entire tree. Leaves with the leaves and the skin of the branches in the leftovers accounted for 20 to 25%, spiked 10 to 15%. There is not much available forest resources in the world and it is more difficult to expand forest resources because of land restrictions.