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瑞光3号,母本为京玉,父本为NJN76.1997年自北京市农林科学院林业果树研究所引进,当年春在费县果树研究所科技示范基地建园666．7m2,株行距2m×4m.试验园土壤有机质含量0．65%,pH值6．8,年平均气温13．4℃,最低－18．3℃,无霜期197d,年降雨量856．4mm,日照时数2532．1h.第二年开
Ruiguang 3, the mother of Jing Yu, the father of NJN76.1997 years since the Kyrgyzstan city of curative effect research, study, spring then in Feixian Institute of Technology Science and Technology demonstration base construction park 666.7m2, spacing of 2m × 4m The content of soil organic matter in the test garden is 0.65%, the pH value is 6.8, the annual average temperature is 13.4 ℃, the lowest is -18.3 ℃, the frost-free period is 197 days, the annual rainfall is 856.4mm and the sunshine duration is 2532.1h. Two years to open