长梗郁李花芽分化的观察

对长梗郁李的花芽进行观察,确定了花芽分化的特征,并对北方长梗郁李花芽分化不同发育阶段同季节的关系进行了分析.结果表明,长梗郁李的芽为混合芽,花序簇生.同枝上不同节位的花芽分化时期不同,同一花芽内数个花芽原始体分化时期也存在差异.长梗郁李单个花芽分化从开始到雌蕊原始体出现,大概需1个月时间.但整个花序的发育时期延续时间较长,从7月中旬果实成熟开始到翌年4月都为发育期,共9个月.由于长梗郁李果实成熟后即进入花芽分化期,因此,在栽培管理上应准确把握花芽分化时期的养分和水分供应,以促进花芽分化量的积累.

Observations on the Flower-Bud Differentiation of Cerasus japonica (Thunb.)Lois. var. nakaii

The characteristics of Cerasus japonica flower-bud differentiation were observed.The relationship between different periods of flower-bud differentiation and seasons was analysed.The results showed that the flower-buds of Cerasus japonica were mixed buds,a cluster of inflorescence.The processes of differentiation on the same branch were different because of the different locations of the buds;the several original buds of the different periods of buds differetiation were observed in one flower bud.It took ap...