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杉木雄球花芽分化中前期核酸含量比雌球花芽和叶芽高１７％～３３％，后期雄的下降而雌的上升。ＲＮＡ／ＤＮＡ前期为２～３，后期为５～６。初期花芽的蛋白质含量与叶芽相近，随后增加。花芽中有１６种氨基酸，脯氦酸与花芽分化关系密切。雄球花芽发生赤霉酸（ＧＡ３）水平很高而脱落酸（ＡＢＡ）很低。雌球花芽的ＧＡ３稍低于叶芽而ＡＢＡ相近。开花时的雌球花ＡＢＡ显著减少而雄球花ＡＢＡ、吲哚乙酸（ＩＡＡ）上升，ＧＡ３下降。花芽中玉米素（ＺＴ）变化平稳，仅略高于叶芽。文章讨论了花芽分化与各类含氮物质及其内源激素的生理作用。
In the early stage of flower bud differentiation, the content of nucleic acid in Chinese fir was 17% ~ 33% higher than that in female flower buds and buds, but decreased in late male and increased in female. RNA / DNA pre-2 to 3, the late 5 to 6. Early flower bud protein content and leaf buds similar, then increased. There are 16 kinds of amino acids in flower buds, and there is close relationship between proline and flower bud differentiation. The male flower buds produce high levels of GA3 and low abscisic acid (ABA). GA3 of female flower buds is slightly lower than leaf buds and ABA is similar. ABA, ABA, IAA increased and GA3 decreased at flowering. Zea mays (ZT) in flower buds changed steadily, only slightly higher than leaf buds. The article discusses the physiological role of floral bud differentiation and various nitrogenous substances and their endogenous hormones.