一、引言: 为了满足祖国社会主义建设日益增长的需要,我们林业生产战线上的重要任务之一是生产更多品质优良的木材。要完成这一个光荣任务,不仅在于提高抚育采伐的技术,更重要的是林业生产技术与品种改良相结合;其具体方法是积极扩大造林面积,研究营林技术,提高 I. Introduction: In order to meet the growing needs of socialist construction in the motherland, one of the important tasks in our forestry production front is to produce more wood of good quality. To accomplish this glorious task, not only lies in raising the technology of tending and harvesting, but more importantly, the combination of forestry production technology and variety improvement; the specific method is to actively expand the area of ​​afforestation, study the technology of silviculture and improve