烟台市林科所自1969年开始板栗良种选育工作,历时17个年头,1985年9月底由省级鉴定,决选出6个最佳良种,即清丰、东丰、玉丰、金丰、石丰和上丰。这几个品种的特点是:产量高,适应性强;除玉丰树冠较开张外,余者皆矮小紧凑,适于密植;东丰、石丰和玉丰都有较强的基部芽结果能力,适于 Forest Branch of Yantai City since 1969 chestnut seed selection and breeding work lasted 17 years, at the end of September 1985 by the provincial appraisal, the final elected six best breed, namely Qingfeng, Dongfeng, Yufeng, Jinfeng , Shi Feng and the abundance. The characteristics of these varieties are: high yield, adaptable; In addition to the opening of Yufeng canopy, the remaining are compact and suitable for close planting; Dongfeng, Shi Feng and Yufeng have a strong base bud ability Suitable