本文以 2 5年生大明栗为材料 ,采用石蜡切片法 ,于 1997～ 1998年对其雄花芽分化进行了较系统的观察和研究。结果表明 :板栗雄花芽形态分化自 5～ 6月到翌年 4～ 5月结束 ,持续 10个月左右。分化过程分为雄花序原基形成期 ,花簇原基形成期、花朵原基形成期、花被原基形成期、雄蕊原基形成期、花药形成期 6个时期 In this paper, 25-year-old Dali chestnut as material, using paraffin section method, from 1997 to 1998 male flower bud differentiation were more systematic observation and research. The results showed that male chestnut flower bud morphological differentiation from May to June the following year from April to May, for 10 months. The differentiation process was divided into male inflorescence primordia forming stage, primordia forming stage, primordium forming stage, primordia forming stage, primordium forming stage and anther formation stage