本研究以大粒、早实、丰产、质优为选种标准，首次推出山东省第二批大粒核用品种，其中魁铃单核重达4g，其综合指标与日本的“藤九郎”相当。本文对银杏良种评选的理论与技术，银杏良种快繁，尤其是砧禾苗培育、扦插和嫁接育苗的理论和技术进行了研究。 In this study, the second batch of large-kernel nuclear cultivars in Shandong Province were introduced for the first time with the criteria of selecting large seeds, early growing seeds, high yielding seeds and high quality, in which the single calluses of the calluses were 4g, the comprehensive indexes of them were comparable with those of Japan. In this paper, the theory and technology of ginkgo variety selection, fast propagation of ginkgo variety, especially the theory and technology of cultivating, cutting, grafting and grafting of anvil seedling were studied.