以玉米品种郑单958为试验材料,采用单因素随机区组排列,在田间种植条件下,研究了玉米产量及其穗部性状与种植密度的关系.结果表明,在天津地区以郑单958为代表的夏播玉米的最佳密度为5 483株·667 m-2.在本研究的种植密度范围内,玉米产量随种植密度的增加而增加;当密度达到一定程度之后,随着密度的增加,产量反而下降.种植密度对穗粗的影响达极显著水平,对穗长、行粒数、穗粒数、单穗质量和单穗粒质量的影响达显著水平,而对穗行数的影响不明显.
Taking the high density tolerant maize Zhengdan958 as the test material, an experimental design with a single factor and randomized blocks was used to study the relationship between planting density and yield with panicle traits under the field planting conditions. The results indicated that the best summer planting density for maize varieties represented by Zhengdan958 was 5 483 plants .667 m^-2 in Tianjin. Among the range of planting density in this study, yield increased with planting density increasing, but yield decreased as planting density increased when planting density reached a certain level. Planting density on ear diameter up to extremely significant level, the influence of the ear length, kernels per row and number of grain per ear and panicle weight and single grain weight reached significant level, the influence of the grains of row was not obvious. Planting density increasing made ear length, ear diameter, kernels per row and number of grain per ear and panicle weight and single grain weight decreased following linear falling relation, while yield increased firstly and then decreased following quadric parabola equation.
Tianjin Agricultural Sciences