利用杨树的一年生枝或萌条的一部分插入土壤或埋入土壤中进行繁殖的方法称为插条繁殖法.此法操作简便,容易成活,目前生产中已被广泛采用.(一)插条育苗的原理插条成活的原理 插条成活与否的关键决定于根的形成.皮部生根的原理 如杨、柳等在正常生长情况下,在枝条的形成层部位,能形成特殊的薄壁细胞,称为根原始体.这些特殊的细胞群,将成为产生大量不定根的物质基础.它在适宜的温度、湿度和通气条件下,即从皮孔中生长出不定根,为插条成活创造了先决条件.愈合组织生根原理 任何植物受伤以后,均有恢复生机、保护伤口形成愈合组织的能 The use of poplar or branch of the annual branch of the sprout into the soil or buried in the soil for breeding method known as the cuttings propagation method. This method is simple and easy to survive, the current production has been widely used. The principle of nursery The principle of survival of cuttings Cuttings live or not depends on the key to the formation of the root of the principle of rooting such as Yang, Liu and other growth in the case of the formation of branches in the formation of special thin-walled Cells, called the root primordia, these particular cell populations, which will become the material basis for a large number of adventitious roots, create adventitious roots that grow under the optimum temperature, humidity and aeration conditions, ie, from lenticels Prerequisites Healing Principle of Root Rooting Any plant that has been injured can be revived to protect the wound from forming healing tissue