种植密度对不同玉米性状和产量的影响

为探明重庆地区玉米种植最佳密度，选有代表性的3个玉米品种采用裂区试验设计，研究种植密度对不同玉米品种田间主要农艺性状和产量的影响。结果表明：‘渝青玉3号’在重庆地区的适宜种植密度为45000~52500株/hm2，产量达到最高的12506.25 kg/hm2‘渝单16号’在重庆地区的最适种植密度为52500~60000株/hm2，产量达到最高的11255.7 kg/hm2，‘渝糯851’的最适种植密度在52500~60000株/hm2。产量达到最高的9209.1 kg/hm2，同品种在不同密度下产量先增后减，说明重庆地区生产上的种植密度没有达到该品种发挥高产潜力的密度。因此，重庆地区可适当增加种植密度。

Effects on Agronomic Characteristics and Yield of Maize Planting Density

In order to study the impact of planting density of major agronomic characteristics and yield of different maize varieties field, choose a local representative of the 3 maize varieties by split plot design, The results showed that, the suitable planting density of ‘Yuqingyu3＇ was 45000-52500 strain/hm2 in Chongqing, yield reached a maximum of 12506.25 kg/hm2; the suitable planting density of ‘Yudan 16＇ was 52500- 60000 strain/hm2 in Chongqing area, yield reached a maximum of 11255.7 kg/hm2; the suitable planting density of ‘Yunuo851＇ was 52500-60000 strain/bin2. The yield reached a maximum of 9209.1 kg/hm2. The same species in different density yield first increased and then decreased. Explain planting density did not reach the varieties play a high yield potential density on production. Therefore, the Chongqing area could be appropriately increased planting density.