金叶风箱果开花结实生物学特性

The Biological Characteristics of Flowering and Fruiting of Physocarpus opulifolius 'Lutein'

在野外定位观测金叶风箱果的单花、单花序、单株花朵的开放动态，利用去雄、套袋、人工授粉对金叶风箱果结实生物学特性进行了观测与调查。结果表明：金叶风箱果的单花花期为（5．6±0．68）d，花序花期为（11．8±0．35）d，全树花期为25-35d。在常温条件下，金叶风箱果花粉生活力可保存2d。自然结实率、自花结实率和异花结实率都很高，相互之间差异不显著。

A field observations was made on the flowering process of single flower, single inflorescence, individual flower, and the fruiting characteristics of Physocarpus opulifolius‘Lutein＇ by means of castration, bagging and artificial pollination. The results showed that the one flower was （5.6±0.68） d, flowering period of single inflorescence was （11.8±0. 35） d and that of the whole tree was 25-35 days in the white variety. The pollen could be stored for at room temperature 2 days without loss of viability. Fruit setting percentages of natural pollination was quite high. Although lilacs being naturally cross pollinated plants, the percentages of artificial self pollination were high. Furthermore, the percentages of artificial cross pollination were also high.