以松玉419为试验材料,田间设置5万、6万、7万、8万、9万株/hm2五个播种密度,重点研究机播密度对春玉米农艺性状和产量及其构成因素的影响。结果表明,随机播密度增加,松玉419产量呈现先增加后降低趋势,但各处理间无显著差异。松玉419是一个大穗、中等耐密型玉米新品种,在吉林地区最佳种植密度为67 762株/hm2(即6.5万~7.0万株/hm2),获得高产的关键栽培措施为降低空秆率、减少秃尖长度。 Taking Songyu 419 as experimental material, five planting densities of 50,000, 60,000, 70,000, 80,000 and 90,000 plants / hm2 were set up in the field. The effects of planting density on agronomic characters, yield and its components of spring maize . The results showed that the yield of Songyu 419 increased at first and then decreased with the increase of random sowing density, but there was no significant difference among treatments. Songyu 419 is a new large-spike, medium-density and tight-tolerance maize cultivar. The optimal planting density in Jilin is 67 762 plants / hm2 (ie 65000 ~ 70000 plants / hm2). The key cultivation measures for high yield are as follows: Crate rate, reduce bald length.