根蘗是颤杨和大齿杨更新的基本方式。将这两种树种的茎砍伐以后,便能形成大量根蘗,当年可长至3—5呎高。蓄积量丰富的大齿杨林分皆伐后,每亩可产生20,000株根蘗苗。目前一般认为,皆伐是保证更新成功的必要条件。有人认为,在秋季,冬季和早春采伐,比在夏季采伐能形成较多的根蘗苗。有不少文献报导了关于促进根蘗形成的方法及发生根蘗的环境 Root tillering is the basic method of poplar and poplar poplar regeneration. After the stems of both species have been cut down, a large number of root tillers can be formed, up to 3-5 feet in height. Populus euphratica, rich in abundance, can produce 20,000 root tillers per acre after it is cleared. It is generally believed that clear cutting is necessary to ensure the success of the update. Some people think that harvesting in autumn, winter and early spring can result in more root tillers than harvesting in summer. There are many reports on the methods of promoting the formation of root tillers and the environment in which root tillers occur