夏玉米进入孕穗期,由于气温逐渐增高,光照充足,植株营养体迅速增大,即长根、又长叶,是营养生长与生殖生长并进的时期。为了促进玉米生育良好,满足雌穗分化对养分和水分的需要,延长穗分化时间,减少小花退化,从而达到穗大、粒多、粒饱和提高后期玉米产量,因此,在田间管理上应着重抓好以下四个方面的关键技术措施。 Summer corn into the booting stage, due to the gradual increase in temperature, adequate light, vegetative body rapidly increased, that is, long roots, and long leaves, vegetative and reproductive growth of the times. In order to promote good maternal fertility, meet the needs of nutrient differentiation and water conservation of ear differentiation, extend the differentiation time of spikes and reduce the degeneration of florets, so as to achieve large spike, more grain and more grain saturation to increase the yield of maize in the late stage. Therefore, attention should be paid to field management Good in the following four aspects of the key technical measures.