在玉米授粉期间，一旦遇到低温、无风天气，且持续在５天以上，秃顶玉米棒率会高达４０％以上，甚至有的玉米棒只有极少数籽粒。 防止玉米秃顶，主要措施是搞好人工授粉。玉米是雌雄同株、异花授粉作物。玉米同株上的雄花比雌花早熟３－５天，同株授粉的机会较少，增产手段是实 During the period of pollination of corn, bald corn cobs can be as high as 40% or more even in low temperature, windless weather for more than 5 days, and even some corn kernels have only a few seeds. Prevent corn bald, the main measure is to do a good job of artificial pollination. Corn is monoecious, cross-pollination crops. Males on the same strain of maize 3-5 days earlier than female flowers, with less chance of pollination, the means of production increase is real