宜机收玉米新品种‘豫单132’适宜种植密度的筛选

为了筛选宜机收玉米新品种‘豫单132’的适宜种植密度,在长葛和原阳试验基地设置5个不同种植密度处理,分别为60000、64500、67500、72000、75000株/hm²,研究不同种植密度对其产量及农艺性状的影响。结果表明,随着种植密度的增加,‘豫单132’的株高和穗位高逐渐增高,茎粗减小;穗长、穗粗、穗行数和行粒数整体呈降低趋势,秃尖长随种植密度的增加而增大;随着种植密度的增加籽粒产量表现出先增加后降低,在67500株/hm²时产量表现最高,呈近似抛物线状分布。因此,玉米新品种‘豫单132’的适宜种植密度为67500株/hm²,这为该品种的推广应用提供了参考。

Suitable Planting Density of New Maize Variety ‘Yudan 132’ for Mechanical Harvesting

In order to screen suitable planting density of new maize variety ‘Yudan 132’ for mechanical harvesting, five planting densities, including 60000, 64500, 67500, 72000 and 75000 plants per hectare, were set in Changge and Yuanyang experimental bases, to study the effects of different planting densities on yield and agronomic traits. The results showed that with the increase of planting density, the plant height and ear height of ‘Yudan 132’ gradually increased, while the stalk diameter decreased. The ear tip-barrenness length increased with the increase of planting density, while ear length, ear diameter, kernel row number and kernel number per row showed a downward trend. With the increase of planting density, grain yield increased first and then decreased, and reached the maximum at 67500plants/hm², showing an approximately parabolic distribution. Therefore, the suitable planting density of new maize variety ‘Yudan 132’ is 67500plants/hm². This study will provide reference for the promotion and application of ‘Yudan 132’.