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通过测定分析银杏叶片中不同生育期中氮、磷、钾的含量 ,基本找出了这 3要素的年动态变化规律。结果表明 :银杏叶片中氮的含量呈逐步降低 ,磷含量逐渐升高之势 ,与同期果实中含量逐步升高正好相对应 ,各月含量间差异较大 ;钾在 5月份含量最低 ,其后各月含量相对稍高 ,并且含量较稳定。同一年份中 ,氮平均含量为 2 .883%、磷0 .352 %、钾 1.0 13%。
By analyzing and analyzing the contents of nitrogen, phosphorus and potassium in different growth stages of Ginkgo biloba leaves, we basically found the annual dynamic changes of these three elements. The results showed that the contents of nitrogen in the leaves of Ginkgo biloba decreased gradually and the content of phosphorus increased gradually, which corresponded with the gradual increase of the content in the fruits of the same period, with a significant difference among the contents in the months. The content of potassium in May was the lowest, Relatively high content of each month, and the content is more stable. In the same year, the average content of nitrogen was 2.883%, phosphorus 0.352%, potassium 1.0 13%.