含笑发根比较困难,故采用高空压条法繁殖,是一种周期短、速度快、株形美、不变异、不退化、成活率高的好方法。但在技术措施上必须有所讲究。一、母株的选择和肥水管理母株必须健壮,枝繁叶茂,自身营养充足。高压前,做好母株的日常肥水管理,并在高压前3天施以氮磷混合肥一次,补充枝条营养。二、准备包土发根用的盆土以7份疏松、肥沃、富含腐殖质的沙质壤土,拌以3份细煤渣(烧过的细煤渣, Laughing hair root is more difficult, so the use of high-pressure method of breeding, is a short cycle, fast, plant-shaped beauty, no variation, no degradation, a good method of survival rate. However, technical measures must be some attention. First, the choice of parent plants and fertilizer and water management The mother plant must be robust, flourishing, adequate nutrition. Before high-pressure, make good management of the daily fertility of the parent plant and apply nitrogen and phosphorus fertilizer three days before the high pressure to supplement the nutrition of the branches. Second, the preparation of soil for the root tuber with 7 loose, fertile, rich in humus sandy loam, mixed with 3 copies of cinder (burned cinder,