1．浇攻粒水俗话说“春旱不算旱，秋旱减一半”，这是因为抽穗开花是玉米需水最多的时期，也是增粒重的关键时期。此期有充足的水分，既能促进灌浆强度，又能延续灌浆时间，而灌浆期越长，粒重越大，产量就越高。反之，此期高温干旱，就会使不孕花粉量增加，花丝抽不出来，授粉 1. Water pouring water As the saying goes, “Spring drought is not dry, fall drought by half,” This is because the flowering of corn is the most water-demanding period, but also a critical period of grain weight. This period has sufficient moisture, both to promote grouting strength, but also to extend the filling time, and the longer the filling period, the greater the grain weight, the higher the yield. On the contrary, this period of high temperature and drought, it will increase the amount of infertile pollen, filaments can not smoke out, pollination