元葱的花为白色小花,每一花序上生五十到数百朵花,中心的花先开放,渐次开向外围。同一花序中种子成熟期不一致,同一块地元葱开花亦有早有晚,将近半个月的时间花才能开完。元葱是虫媒花,花序易存水腐烂,故遇雨会严重影响授粉,种子产量低,质量也差。因此,花期防雨是搞好元葱采种的重要措施。 Yuan onion flowers are white flowers, each inflorescence fifty to hundreds of flowers, the center of the first open flower, gradually open to the periphery. In the same inflorescence, the seed maturation period is inconsistent, with the same piece of onion spring and early blooming also have late, nearly half a month’s time to open the flower. Yuan onion is insect flower, inflorescence easy to store water decay, so the rain will seriously affect the pollination, the seed yield is low, the quality is poor. Therefore, flowering rain is an important measure to do a good job onion seed.