大葱半成株来种产量高、成本低、周期短、效益好，葱种种性完全符合生产要求，因此，被广泛应用。山东省主要是利用麦若地育苗，利用秋玉米茬定植，翌年6月收大葱种子，即在一年的时间内完成育苗到收种的全过程。自1989年以来，我们对影响大葱半成株果种量的措施进行了探讨，现 Welsh onion is a kind of plant with high yield, low cost, short cycle and good efficiency. All kinds of onions are in full compliance with production requirements. Therefore, it is widely used. Shandong Province is mainly used Mairuo nursery, the use of autumn corn stubble planting, the next year in June received onion seeds, that is, within a year’s time to complete the nursery to harvest the whole process. Since 1989, we have discussed the measures that affect the amount of half-grown green onions