本文综合分析了淮阴地区历年来有关春玉米密植定额和种植方式的试验资料。在密植定额问题上,研究了密度与产量、品种、生产水平间的关系,并从田间小气候、植株生长发育、光能利用、群体与个体关系等方面探索了密植增产的原因;在种植方式问题上,比较了不同生产水平和不同密度下,宽窄行和等行距的效果,并从根系发育、植株性状、田间小气候、光能利用等方面分析了宽窄行减产的原因。 This paper comprehensively analyzed the experimental data on the planting quotas and planting methods of spring maize over the years in Huaiyin area. On the issue of planting quota, the relationship between density and yield, variety and production level was studied. The reason of close planting and yield increase was explored from the field microclimate, plant growth and development, light energy utilization, population and individual relationship. The effects of different widths and widths on width, width and spacing were compared. The reasons for the decrease of yield were analyzed from aspects of root development, plant traits, field microclimates and light energy utilization.