二月中旬至三月底,在10年生以内的母树上选择树冠中、下层的冠外枝,剪成6～8厘米长的插穗,并保留好顶芽。扦插前,每30～50根扎成一捆,放在100ppm的2、4—D溶液中浸12～24小时(基部浸没2厘米左右)。然后,在事先准备好的插床上按8×10厘米的株行距扦插,插入深度约为穗长的三分之二左右。扦插后至生根前,一般情况 From mid-February to the end of March, the crown branches of middle and lower canopy are selected on mother trees within 10 years old, cut into 6 ~ 8 cm long cuttings, and retain the top bud. Before cutting, every 30 to 50 tie into a bundle, put in 100ppm of 2,4-D solution soak for 12 to 24 hours (basal immersion 2 cm or so). Then, cuttings were cut into 8 × 10 cm rows on a prepared bed, and the insertion depth was about two-thirds of the spike length. Cuttings to take root before, the general situation