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本项白杨派树种的杂交育种工作始于七十年代初期,先后进行了白杨派种间及杂种间30多个杂交组合的试验,获得杂种苗6千余株。经过多次优选,到1986年已建成对比试验林9处。1986年8月由山东省林业厅主持进行了成果鉴定,认为选育出的4个窄冠型白杨新品种(中27、4—4、19—7、22—6)速生、抗性强、树冠窄(胸径20厘米左右时,冠幅1.5—2.0米),适合农田林网及林粮间作种植(此结果已发表在山东林业科技1986年第四期)。
This poplar tree species hybrid breeding work began in the early 1970s, has conducted a white poplar inter-species and hybrids more than 30 hybrid combinations of trials, access to more than 6 hybrid seedlings. After many times of preference, by 1986, it has built 9 comparative experimental forests. 1986 August by the Shandong Provincial Department of Forestry presided over the identification of the results that the breeding of four narrow-crown poplar new varieties (27,4-4,19-7,22-6) fast-growing, strong resistance, The crown is narrow (diameter of about 20 cm, the crown of 1.5-2.0 m), suitable for farmland forest and intercropping forest (this result has been published in Shandong Forestry Science and Technology in 1986 fourth issue).