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银杏雌花芽形态分化前的５月初，ＺＴ（玉米素）、ＡＢＡ（脱落酸）处于高峰，ｉＰＡｓ（异戊烯腺嘌呤类）的高峰晚２０ｄ出现；６月份，随着形态分化开始，ＺＴ、ｉＰＡｓ和ＡＢＡ的含量下降并维持低水平；１１月开始落叶时ＡＢＡ含量迅速上升。ＩＡＡ（吲哚乙酸）在５月中旬出现峰值，进入６月形态分化开始后则在略低水平上波动，９月底开始缓慢下降。
ZT (zeatin) and ABA (abscisic acid) peaked at the beginning of May before the morphological differentiation of female flower buds of Ginkgo biloba, and peak occurred at 20 days after the peak of iPAs (isopentenyladenine). In June, with morphological differentiation, ZT, The contents of iPAs and ABA decreased and remained low. The content of ABA increased rapidly when leaves began to fall in November. IAA (indoleacetic acid) peaked in mid-May and entered a slightly lower level after it started to morphonally differentiated in June and began to decline slowly at the end of September.