1972年,我国从意大利引进6个杨树新品种。1977年在江苏北部泗阳县引种试栽首创成功,各地纷纷引种,特别是江汉平原、江淮平原和长江下游一带,扩大了杨树栽培区,促进了平原绿化的发展。但是,对国外杨树引种还存在着一些问题:种源不清,名称混乱,盲目引种,对新品种基本特性缺少了解,因而不能发挥良种优势与增产潜 In 1972, China imported 6 new poplar varieties from Italy. In 1977, the trial planting planted in Siyang County, northern Jiangsu Province was first successful. Various places were introduced, especially the Jianghan Plain, the Jianghuai Plain and the lower reaches of the Yangtze River. Poplar cultivation areas were expanded and the plains greening was promoted. However, the introduction of poplar foreign countries, there are still some problems: unclear provenance, chaotic name, blind introduction, lack of understanding of the basic characteristics of new varieties, which can not play a good seed and yield potential