玉米花粒期的管理以提高结实率,延长根叶功能期,防止植株早衰,力争穗大、粒多、粒重为目标,主要管理技术如下。补施粒肥在早施穗肥或穗肥用量不足,出现叶色转淡,有早衰现象甚至中下部叶片发黄、有干枯可能时,应及时补施速效性氮素化肥,也可用1%～2%的尿素 Management of poplar period to improve seed setting rate, to extend the function of root and leaf, to prevent premature aging plants, and strive to spike, grain and grain weight as the goal, the main management techniques are as follows. Fill fertilizer in the early panicle or panicle insufficient amount of application, the emergence of leaf color downturn, premature aging or yellow leaves in the middle and lower, there is the possibility of dry, it should be promptly supplemented with quick-acting nitrogen fertilizer can also be used 1% 2% urea