稀有珍贵树种黄桷兰,学名白兰花,又称白玉兰,是庭园中名贵的观赏树.但因母种稀少,种子繁殖困难,多用无性繁殖方法.(一)空中压条法:初夏,选健壮母树树冠中、上部无病虫害,生命力旺盛的一年生4cm壮枝(头年生春梢最好),取梢上35—50cm的枝,于叶柄基部下3分处,用小刀作环状上切口,向下距4cm左右作环状下切口,剥净皮层, Rare and precious tree species Paphiopedilum, orchid white orchid, also known as Magnolia, is a valuable ornamental trees in the garden, but because of rare mother, seed breeding difficulties, the use of asexual reproduction method (a) air pressure method: early summer, choose robust mother tree Tree crown, the upper part of the pests and diseases, vitality of the annual 4cm Zhuangzhi (first-year spring shoots best), take shoots on the branches of 35-50cm, 3 points at the base of the petioles, with a knife for annular incision, down About 4cm away from the ring under the incision, stripping net skin,