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连续三年对引进的燕红、燕奎、燕山短枝等 6个品种的生物学特性、生长发育规律作了观察测定。参试品种各物候期相近 ,雌雄花盛花期相差 1～ 3天 ,唯成熟期差异最大 ,早、晚熟品种成熟期相差 3 0余天。树冠外围结果新梢快速加长、加粗生长期分别为 4月中旬至 5月上旬、4月中下旬至 5月初。栗实鲜重增长高峰在采收前 1 0～ 7天 ,干物质积累则主要在采收前 7～ 3天
For three consecutive years the introduction of the Yan Hong, Yan Kui, Yanshan short branch of six species of biological characteristics, growth and development were observed and measured. The phenophases of the tested cultivars were similar, the difference between the male and female flowers was from 1 to 3 days, the difference was the largest among the mature stages, and the difference between mature and late maturing varieties was more than 30 days. Peripheral results canopy rapid shoot extension, bold growth period from mid-April to early May, mid-April to early May. Fresh chestnut weight growth peak 10 ~ 7 days before harvest, dry matter accumulation is mainly 7 to 3 days before harvest