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英国梧桐(Platanus acerifolia)是城市绿化的主要树种,近些年来,各地都出现了一些衰退现象。衰退的原因,分纯粹生理性病因和寄生生物病因。一、纯粹生理性病因
Platanus acerifolia is a major tree species in urban greening and some recessions have taken place in recent years. Reasons for the decline, divided into purely physiological causes and parasitic etiology. First, purely physiological causes