云杉幼树对云杉林的形成具有重大作用,因此必须全面深入地研究它的生物学及生态学特性。在营林实践中经常有这种情况,即在近熟林和成熟林林冠下幼树不够,需要采取措施宋增加幼树株数。那些从林冠下先长出来的云杉幼树,在采伐迹地上有时死亡。因此在森林砍伐前必须正确地鉴定幼树的质量和数量。为了阐明林冠下云杉更新的特点及云杉幼树的发 Spruce sapling has a significant effect on the formation of spruce forest, so its biological and ecological characteristics must be fully and thoroughly studied. In the practice of silviculture it is often the case that there are not enough young trees under canopies in mature and mature forests and that measures need to be taken to increase the number of saplings. Spruce saplings, emerging from under canopy, sometimes die on deforested land. Therefore, the quality and quantity of saplings must be correctly identified before deforestation. In order to clarify the spruce canopy renewal characteristics and spruce sapling hair