一、适宜扦插的树种有。杨树、柳树、桧柏、银杏、杜仲、雪松、龙柏、海桐、葡萄等。 二、条件。嫩枝扦插要求空气和土壤湿度较高,特别是空所湿度对生根起重要作用,一般空气湿度应保持95％左右。温度控制在25—28℃。 三、剪母条。采集母条以6月底至7月下旬为宜。可结合夏剪,从健壮树上选粗壮半木质化的当年生新梢做母条,这类枝条养分充足,扦插容易成活。 四、剪制插穗。插穗长度为4—12厘米,可根据嫩枝节间的长短决定,一般留2—4个芽,节间短的多留几节,节间长少留几节。针叶树应保留顶芽及全部针叶。阔叶树可留2—3片叶,并剪去叶片的2/3, First, suitable for cutting tree species. Poplar, willow, cypress, ginkgo, Eucommia, cedar, cypress, Pittosporum, grapes and so on. Second, conditions. Softwood cuttings require air and soil humidity is high, especially the air humidity plays an important role in rooting, the general air humidity should be maintained at about 95%. Temperature control at 25-28 ℃. Third, cut the parent bar. Acquisition of parent bar by the end of June to late July appropriate. Can be combined with summer scissors, sturdy from the selection of robust semi-lignification of the new year to do the parent shoots, such branches sufficient nutrients, cutting easy to survive. Fourth, cut cuttings. Spike length of 4-12 cm, according to the length of the twig section decided to generally stay 2-4 buds, internodes short stay more than a few, internodal length stay few sections. Conifers should retain the top buds and all needles. Broad leaves can leave 2-3 leaves, and cut the leaves 2/3,