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鲁克斯杨(Populus deltoides cv. ‘Lux’)×山海关杨(P. delioides cv. ‘Shanhaiguan’)(简称鲁×山),山海关杨×哈佛杨(P. deltoides cv. ‘Harvard’)(简称山×哈),圣马丁诺杨(又称Ⅰ-72)(P.×euramericana cv.‘Sanmartino’)×山海关杨(简称72×山),是1982年人工切枝水培杂交集团选择的。它们的特点生长快、主干直、抗病性强,是当前速生丰产林和造纸林的优良品种,深受群众的欢迎。这3个优良品种均属美洲黑杨类,目前国内外美洲黑杨类的品种,硬枝扦插成活率较低。例如,意大利卡萨列蒙菲拉托的杨树栽培研究,在1957～1969年的哈佛杨扦插成活率平均为41％,鲁克斯杨扦插成活率平均为62％,
Populus deltoides cv. ’Lux’ × P. delioides cv. ’Shanhaiguan’ (referred to as Lu × mountains), Shanhaiguan Yang × P. deltoides cv. ’Harvard’ (referred to as Shan × ha), San Martino (also known as Ⅰ-72) (P. × euramericana cv.’Sanmartino ’× Shanhaiguan Yang (referred to as 72 × mountains), 1982 artificial seeding hydroponic hybrid group selection. They are characterized by fast growth, straight stems and strong disease resistance. They are excellent varieties of fast-growing and high-yield forests and paper-making forests and are well received by the masses. These three fine varieties are American black poplar species, the current domestic and international species of black poplar, hardwood cutting survival rate is low. For example, poplar cultivation in Casa le Monferrato, Italy, showed an average survival rate of 41% for Harvard poplar cuttings from 1957 to 1969, an average survival rate of 62%