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１９９８年春从中国林科院的实验点甘肃临夏回族自治州林科所引入北方型美洲黑杨（Ｐ．ｄｅｌｔｏｉｄｅｓ）×青杨（Ｐ．ｃａｔｈａｙａｎａ）杂种无性系 １３７个，扦插在内蒙奈曼旗兴隆沼林场二分场。１９９８年秋选出 １３个无性系，加入我地区新近确定的推广无性系──白城 ４１作对照，１９９９年建无性系测试圃，２０００年春平茬，２０００年秋对这 １３个无性系生长量和抗性的调查与评价，以白城 ４１为对照，初步选择出 １０个无性系，高生长较对照大 ３０％以上的有 ４个，２０％以上 ５个；径生长大 ５０％的 ３个，３０％以上 ２个，２０％以上 ４个；所有无性系的抗锈病情况都好于对照。为丰富三北地区营造杨树农田防护林品种和改善三北地区杨树品种单一的问题有望选出新无性系。
In the spring of 1998, 137 clones of P. deltoides × P. chenhayana hybrid clones were introduced from Linke Autonomous Prefecture of Linxia, Gansu, China, from the experiment point of the Chinese Academy of Forestry in the spring of 1998. Cuttings were excavated in Inner Mongolia Naiman Banner Xinglong Marsh Forest field two field. Thirteen clones were selected in the autumn of 1998 to join the recently established clones in our region - Baicheng 41 as a control, clonal nurseries in 1999, spring stubble in 2000 and autumn 2000. According to the investigation and evaluation of Baicheng 41, 10 clones were initially selected, 4 of which grew more than 30% and 5 of more than 20% More than 2, more than 20% 4; rust resistance of all clones are better than the control. To enrich the Three North region to create poplar farmland shelterbelt varieties and improve the three northern poplar species is expected to single out the new clones.