在大森林里,有些树种不仅可用种子进行有性繁殖,而且也能用营养器官如根、茎等进行萌芽、根蘖、压条、插条等无性繁殖。后者为我们在无种源的情况下更新无林地或疏林地创造了有利条件。现择其中的两种介绍如下: 萌芽更新杉木、柳杉、冲天柏、桉、杨、柳、桦木、桤木、滇楸、刺槐、栎、黑荆树、铁刀木等许许多多树种伐去树干后,伐根上的不定芽和休眠芽会萌发形成萌条,将萌条培育成小径材、薪炭材、 In large forests, some tree species can not only be sexually propagated with seeds, but also germinate with vegetative organs such as roots and stems, and vegetative propagation of root tillers, battens and cuttings. The latter created favorable conditions for us to update no woodlands or open forests in the absence of provenance. Now choose two of them are as follows: sprout update fir, cedar, red cypress, eucalyptus, poplar, willow, birch, alder, berberine, acacia, oak, black wattle, Go to the trunk, the sprouting of adventitious buds and buds will germinate sprouting buds, the sprouts into small trails, firewood,