大乌圆龙眼开花特性观察

Flowering characteristics of longan Dawuyuan

从单穗、单株和植株群体3个方面调查分析大乌圆龙眼雌雄花开花特性。结果表明，大乌圆龙眼雌雄花交替开放的顺序是雄-雌-雄，植株群体雌雄花开放相遇时间比单穗和单株长；雌花在开花后5-14d为落花高峰期。雄花在开花后8-18d、19-26d分别出现两个落花高峰。因此，生产上大乌圆龙眼园种植株数要在10株以上，以增加雌雄花花期相遇天数。促进授粉受精,实现丰产。

The investigation and analysis of the flowering characteristics of male and female flowers of longan variety Dawuyuan were conducted from single ear, single plant and plant population. The results showed that the flowering order was from male flower to female flower to male flower. The flowering period of male flower synchronous with female flower in the population were longer than that in a single ear or a single plant. The peak time of female flower dropping was 5-14 days after flowering, and two peaks of male flower dropping was 8-18 days and 19-26 days after flowering, respectively. It was recommended to an orchard that at least ten plants should be planted to increase the synchronous days of flowering period for male and female flower, promote the pollination and fertilization and get high yield.