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为了揭示银杏种子生长发育对矿物质养分的需求规律，研究了不同生长发育时期银杏种子中Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ等矿质营养元素含量的季节变化。结果表明，银杏种子中Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ元素的含量随时间呈从高到低的规律性变化，但不同元素间变化的幅度不同，整个生长季中４月底至５月下旬和５月下旬至６月上旬银杏种子中营养元素含量变化较大。微量元素的含量变化各有其特点。同一时期正常发育种子和脱落种子中营养元素含量存在明显差异。成熟种子中８种主要营养元素含量为Ｎ１０．４ｇ／ｋｇ，Ｐ１．３ｇ／ｋｇ，Ｋ１４．９ｇ／ｋｇ，Ｃａ１．３ｇ／ｋｇ，Ｍｇ０．９ｇ／ｋｇ，Ｍｎ３．２ｍｇ／ｋｇ，Ｚｎ２７．６ｍｇ／ｋｇ，Ｆｅ１０．０ｍｇ／ｋｇ。
In order to reveal the regularity of mineral nutrients requirement of Ginkgo seed growth and development, the seasonal changes of N, P, K, Ca, Mg and other mineral nutrients in Ginkgo biloba seeds at different growth and development stages were studied. The results showed that the contents of N, P, K, Ca and Mg in seeds of Ginkgo biloba changed regularly from high to low, but the variation range of different elements varied from the end of April to the end of May In late May to early June, the content of nutrients in Ginkgo biloba seeds varied greatly. Trace element content changes have their own characteristics. During the same period, there was a significant difference in the content of nutrients between normal seed and detached seed. The content of 8 main nutrients in mature seeds was N10.4g / kg, P1.3g / kg, K14.9g / kg, Ca1.3g / kg, Mg0.9g / kg, Mn3.2mg / kg, Zn27.6mg / kg, Fe10.0 mg / kg.