玉米秃顶可造成减产10～15%。造成玉米秃顶的原因主要是雌蕊发育不良和花粉不足。生产上可采取相应措施予以防止。一、重视穗肥抽穗前约10～15天,即中熟品种展开叶约10～11片,晚熟品种展开叶约12片时,每亩用12～14公斤尿素根外追肥。吐丝前,每亩再追施3公斤尿素作攻粒肥。 Bald head of corn can cause 10 to 15% cut. The main cause of baldness in corn is pistil dysplasia and pollen deficiency. Production can take appropriate measures to prevent it. First, pay attention to ear before heading about 10 to 15 days, that is, medium maturing varieties about 10 to 11 leaves, late maturing varieties about 12 leaves, with 12 to 14 kg of urea per mu top dressing. Before silking, each kilogram and then chase 3 kilograms of urea for attack grain fertilizer.