凉城地区过去营造的人工林以小叶杨为主。绝大多数生长不良,出现未老先衰的“小老树”,生长量低。近年来,我们发现有一种开黄花的小青杨,对凉城地区的生境条件有高度的适应能力,比其它青杨派树种有明显的优点,比小叶杨更为优良。黄花小青杨主要分布在凉城六苏木公社南房子大队。我们初步认为黄花小青杨系青杨的一个优良自然类型。在分类上有待进一步核实。 Liangcheng area in the past to create a plantation of Populus mainly. The vast majority of poor growth, there is not premature aging “little old tree”, low growth. In recent years, we found that there is a kind of small yellow poplar which has a high adaptability to the habitat conditions in Liangcheng area. It has obvious advantages over other Populus euphratica trees and is more excellent than Populus simonii. Little Yellow Poplar mainly distributed in Liangcheng six Sumu commune South House Brigade. We initially believe that the small green Qing Yang Qingyang a good natural type. In the classification to be further verified.