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为了解银杏叶片中黄酮及内酯含量以及其变化规律对叶用园的建立、管理、对EBG提取，我们对贵州部分地区银杏树龄、性别、繁殖方式及采叶期对银杏叶片黄酮、内酯含量的影响进行了研究，为银杏叶的合理利用提供依据。1材料与方法供试的银杏叶片，于1995～1996年分别采自贵州农学
In order to understand the content of flavonoids and lactones in Ginkgo biloba leaves and their changing rules, we studied the establishment of ginkgo biloba leaves, the management and extraction of EBG. Content of the impact of research to provide a basis for the rational use of Ginkgo biloba. 1 Materials and Methods Ginkgo biloba leaves were collected from Guizhou Agricultural Science from 1995 to 1996