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Changes of chilling and heat accumulation of apple and their effects on the first flowering date in the main planting areas of northern China
LIU Lu, GUO Liang, LI Man-hua, FU Wei-dong, LUAN Qing
Chinese Journal of Applied Ecology . 2020, (7): 2457 -2463 .  DOI: 10.13287/j.1001-9332.202007.026