对于杨树的繁殖育苗,由于种子采集较难,一般多采用无性繁殖。“嫩枝扦插”也属于无性繁殖方法之一:即利用杨树的嫩梢部分,在五月份扦插育苗的方法,北京铁路林场在56年开始应用,它的具体作法是在五月中旬,当杨树萌芽后长出新梢阶段,将嫩梢代叶五、六枝剪下,约长25公分,最好是在下午、气温不太高时,将剪下嫩 Poplar breeding for breeding, due to the harder to collect the seeds, the general use of more asexual reproduction. “Softwood cutting ” is also part of the asexual reproduction method: the use of young shoots of poplar part of the method of cutting propagation in May, Beijing Railway Forest began in 56 years, its practice is in mid-May , When the sprouts grow new shoot stage, the tender shoots on behalf of the leaf five or six cut, about 25 cm long, preferably in the afternoon, the temperature is not too high, will cut the tender