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该项研究采用多父本杂交方式，培育了杂种后代２８１４３株。在低产立地条件下利用杂种的可塑性，经定向培育和选择，选育出了速生期长、后期生长旺盛的冀廊杨１、２、３号３个工业用材杨树杂种新无性系。３个冀廊杨平均材积生长量超过对比种山海关杨１倍以上；扦插成活率９０％以上，超过山海关杨、Ⅰ—６３杨、Ⅰ—６９杨及同类研究成果中的其它杂交种；木材纤维变幅１．０６３８～１．２２９２ｍｍ，在阔叶树材种中均属长纤维，其中冀廊杨３号木材纤维长度高达１．２２９２ｍｍ，分别超过中林４６、Ⅰ—２１４、露伊莎１２％、１５％、１９％；木材基本密度变幅０．３４４～０．４１０ｇ／ｃｍ３，其中冀廊杨２号分别超过中林４６、Ⅰ—２１４、露伊莎２６％、４１％、２３％。
In this study, a polyploid cross was used to breed 28,143 hybrid offspring. Based on the plasticity of hybrids, the new clones of poplar hybrids were popularized by directional breeding and selection. The average volumetric growth of the three JI corridor poplars was over 1 times higher than that of the corresponding species, and the survival rate of cuttings was more than 90%, exceeding that of the other hybrids in Shanhaiguan Yang, Ⅰ-63 and I-69, and similar research results. The amplitude ranged from 1.0638 to 1.2292 mm, belonging to long fiber in broad-leaved tree species. The length of lumber from Ji-lang-Yang 3 was 1.2292 mm, which exceeded that of Zhonglin 46, Ⅰ-214 and Luisa respectively, 15% and 19%, respectively. The basic density of lumber ranged from 0.344 to 0.410g / cm3, of which, Lujuan Yang 2 exceeded Zhonglian 46, I-214 and Luisa respectively by 26%, 41% and 23% respectively.