同时具有适应范围广、抗病虫强的特性，是大连地区杨树造林优良无性系。
At the same time they had strong adaptability in wide area, and characteristics of anti-disease and pest and were outstanding clones of poplar in Dalian area.
杨树是世界上分布广、适应性强的树种，主要分布在北半球温带、寒温带区域。
Poplar is the species which are widely distributed in the world, adaptable and mainly in northern temperate, cold temperate regions.
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