目前世界上每年造林以1450万公顷的速度增加,所用种苗大部分是经过遗传改良过的材料。现在,尽管遗传改良过的人工林中部分成熟林正在采代利用,但只有等到下一世纪其木材数量才会占有较大比例。由于人工林生产力高和可采性,再过10-20年经过遗传改良的人工林生产的木材将占世界木材消费量的很大比例。 At present, the annual afforestation in the world is increased by 14.5 million hectares. Most of the seedlings used are genetically modified materials. Now, while some of the mature forests in genetically modified plantations are being tapped, they will not be accounted for by a large percentage until the next century. Due to the high productivity and accessibility of plantations, wood produced by genetically modified plantations in another 10-20 years will account for a large proportion of the world’s timber consumption.