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二、杨树新品种自1975、1977年黑龙江省杨树委员会建议推广杨树六个新品种后,牡丹江、合江、松花江等许多地区从省内科研单位、北京、辽宁、吉林、河北等地引进小×黑、小青×黑、北京605、白城2号、俄罗斯杨、美×青、加×香、小青×美黑、马氏×美黑等杨树品种和杂交种进行区域性栽培试验。经7—8年的区域性栽培试验,初步证明其中一些杨树品种适于林区生长。据牡丹江林管局林口林业局科
Second, the new varieties of poplar Since 1975, 1977, Heilongjiang Province Poplar Committee recommended Poplar six new varieties, Mudanjiang, Hejiang, Songhua River and many other areas from the province’s scientific research units, Beijing, Liaoning, Jilin, Hebei and other places to introduce Small × black, Xiaoqing × black, Beijing 605, Baicheng 2, Russia Yang, the United States × blue, plus × Hong, Xiaoqing × Black, Marsh × the United States and other black poplar varieties and hybrids for regional cultivation trials . After 7-8 years of regional cultivation experiments, some of them proves that some poplar varieties are suitable for forest growth. According to Mudanjiang Forestry Bureau Linkou Forestry Bureau