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辽西地区杨树常发生冻害现象,经调查研究,是由多种因素引起的,采取相应的预防措施,可有效地控制杨树冻害发生。
Poplar frost damage occurs frequently in western Liaoning. After investigation and study, it is caused by many factors, and corresponding precautionary measures can be taken to effectively control the frost damage of poplar.