苹果果实形状和重量的早期预测研究

Study on the Forecasting of Apple Fruit Form Index and Fruit Weight during the Early Growing Season

通过果实生育早期的果形指数和果实纵径+横径可以成功预测苹果果实成熟时的果形指数和单个果实的重量。红富士苹果通过盛花后30d时的果形指数(X)预测成熟时的果形指数(Y)的回归方程为幂函数Y=0.805X0.278,果形指数随盛花后天数的变化拟合抛物线函数Y=1.36-0.009X+0.000035X2。在中国西北黄土高原旱原地区,红富士苹果在盛花后约50d以前果形指数大于1;之后逐渐降低,盛花后约129d时降低至最小0.7814;果实成熟前有所回升,至成熟采收时约为0.8740。通过测量盛花后50d时的果实纵径+横径(X,cm),可以预测成熟时的单果重(Y,g),其回归方程为幂函数Y=0.677X3.2。

The fruit form index and individual fruit weight at harvest time were forecasted by fruit form index and fruit length + diameter respectively during the early growing season. The fruit form index at 30 days after full bloom (DAFB) was correlated with that at harvest by power function Y=0.805X0.278.And the fruit form index in different growing season was correlated with the DAFB by equation Y=1.36-0.009X+0.000035X2.The fruit length + diameter at 50 DAFB(X ,cm) was correlated with the individual fruit weight at harvest (Y ,g)by power function Y=0.677X3.2?