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１９９５～１９９７年采用摘叶法和石蜡切片法对苹果梨花芽生理分化及形态分化进行了系统观察。结果表明，苹果梨花芽生理分化期从短枝停长后开始（６月初），一直持续到形态分化开始期。花芽形态分化从７月中下旬开始，经历了分化初期，花蕾形成期，花萼形成期，花瓣形成期，雄蕊形成期和雌蕊形成期，落叶前雌蕊分化一般都已完成。
From 1995 to 1997, the methods of pick leaf and paraffin section were used to systematically observe the physiological differentiation and morphological differentiation of apple pear flower buds. The results showed that the physiological differentiation of apple pear flower buds started from the short branch stopped (early June) and continued until the beginning of morphological differentiation. Flower bud morphogenesis began in late July and experienced the stages of differentiation, flower bud formation, calyx formation, petal formation, stamen formation and pistil formation, and the pistil differentiation before deciduous has generally been completed.