为解决毛白杨无性繁殖难的问题,可采用反袋嫁接法。此法易掌握、又省工(不捆绑)、成活率高,苗木生长健壮。嫁接时间,以砧木皮层易剥离时为宜。一般4月中旬至5月。只要能保持接穗不发芽,还可延长嫁接时间。用粗细不超过1.2cm 的接穗嫁接为好。嫁接方法:先将留床的一年生杨树苗(以小美杨、北京杨为好)齐地面平茬。把留有2个芽的毛白杨接穗,在有下芽的一侧,削长1cm 的斜面,然后轻轻将削面的两边缘修削整齐,再将削面尖端稍削去一点,即 In order to solve the problem of clonal propagation of Populus tomentosa, anti-bag grafting method can be used. This method easy to grasp, but also labor (not tied), high survival rate, robust growth of seedlings. Grafting time to rootstock cortex easy to peel when appropriate. Generally mid-April to May. As long as you can keep the scion does not sprout, but also extend the grafting time. Grafts with a thickness of not more than 1.2 cm are better. Grafting methods: first annual bed of young poplar seedlings (in the United States Yang, Beijing Yang as well) stubble on the ground. Leave the bud with two buds of white poplar scion, in the lower bud side, cut 1cm slant, and then gently trim the two edges of the noodles neatly, and then cut a little rough noodles that point