杨树种类繁多，仅黑龙江省就达几十种。对于杨树的分类、识别一般常以形态特征为依据。但由于杨树极易自然杂交和人工杂交，故杂种及各种自然类型就特别多，这给分类上带来很多困难。本研究通过对杨树同工过氧化物酶的分析，为杨树品系进行鉴别提供了科学依据，进而为杨树的群 A wide variety of poplar, Heilongjiang province alone reached dozens of species. For poplar classification, identification is usually based on morphological characteristics. However, due to the extremely easy natural hybridization and artificial hybridization of poplar, hybrids and various natural types are particularly numerous, which brings many difficulties in classification. In this study, through the analysis of the peroxidase in Poplar, it provided a scientific basis for the identification of poplar strains,