The flowering date of rape plants in Nanchang county was studied by using the meteorological data, and the influ-ences of meteorological factors on the flowering date of rape plants were analyzed. The main conclusions were obtained as follows:the average date of initial budding, popular budding, initial bolting, popular bolting, initial flowering, popular flowering, and vig-orous flowering of rape plants was January 5th, January 21st, February 10th, February 17th, March 1st, March 8th, and March 19th, respectively; the average duration from initial budding to popular budding, from initial bolting to popular bolting, from initial flowering to popular flowering, and from popular flowering to vigorous flowering of rape plants was 7, 8, 8 and 11 d, re-spectively. The regression equations established by using the meteorological factors and the duration ( day number) at various stage of rape flowering could be used to predict the flowering date of rape plants. The duration from initial budding to popular budding of rape plants was significantly negatively correlated with the average air temperature and the minimum air temperature in flowering period;the duration from popular flowering to vigorous flowering of rape plants was significantly negatively correlated with the min-imum air temperature during 2～3 weeks before flowering period, but there was no significant correlation between the rainfall and the flowering date of rape plants.%利用气象资料对南昌县油菜花花期进行研究,分析了气象因子对油菜花期的影响.结果表明:油菜花现蕾始期、现蕾普期、抽薹始期、抽薹普期、开花始期、开花普期、开花盛期平均日期分别为1月5日、1月21日、2月10日、2月17日、3月1日、3月8日、3月19日.油菜花现蕾始-普期、抽薹始-普期、开花始-普期、开花普-盛期间隔日平均值分别为7、8、8、11 d.利用气象因子和油菜花期各阶段日数建立的回归方程可用于油菜花花期预测.油菜花现蕾始期至普期间隔日数与开花期平均气温、开花期最低气温呈显著负相关关系,开花普期至盛期间隔日数与开花期前2周最低气温、开花期前3周最低气温呈显著负相关关系,而降水量与油菜花花期相关性不显著.
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