毛白杨是我省优良的速生用材树种,为广大贫下中农所喜爱。由于繁殖困难,种源不足,故影响了大面积发展。我大队在大搞方田化的农业学大寨运动中,大力推广了毛白杨炮捻嫁接法。仅以1974年为例,共接20万株,成活率达80％以上,有的地块高达90％以上。嫁接苗当年高2—3米,粗约2厘米。三年来的实践使我们体会到炮捻接有很多好处: Populus tomentosa is the province of excellent fast-growing timber species, favorite for the majority of poor middle peasants. Due to breeding difficulties, lack of provenances, it affected the large-scale development. During the campaign to popularize Fangtianhua’s Dazhai Agriculture, my brigade vigorously popularized Populus tomentosa twisting and grafting. Only in 1974, for example, a total of 200,000 were connected, the survival rate of 80% or more, and some plots up to 90%. Grafted seedlings year high 2-3 meters, roughly 2 cm. Three years of practice so that we understand the many advantages of gun splicing: