为了探索适宜本地区种植的玉米品种与播期，于2015年在山西省早熟玉米区以特早熟、早熟、中熟3个不同熟期玉米品种为测试材料，测定不同播期下玉米的生育期和产量及其构成。结果表明，在本试验设置的4个播期中，特早熟和早熟品种都能安全成熟，而中熟品种4月21日以后播种不能正常成熟。随着播期的提前，所有不同熟期的玉米品种产量均呈上升趋势。早熟和中熟品种的产量显著大于特早熟，但早熟与中熟品种之间的产量差异不显著。产量差异的主要原因是由于百粒重之间的不同引起的。在产量与相关环境因子之间的关系中，生育期积温与产量呈显著正相关，产量随积温增加而增加。由此可见，本地区适宜种植早熟品种，最佳播期一般在4月20号左右，产量最高。%In order to explore the suitable sowing dates and maize varieties, in the early matured district of Shanxi Province in 2015, the earliest matured and early matured and middle matured maize varieties were used as materials. The growth stage and yield and yield components were detected at different sowing stages. The results showed that, at the four stages, the earliest matured and early matured maize varieties could mature normally, but middle matured maize varieties could not mature which were sowed after April 21. With the sowing date moving up, the yield of the different growth stage varieties were all increased significantly. Yields of early matured and middle matured maize varieties were significantly greater than the earliest matured maize varieties, but there was not significant difference between early matured and middle matured maize varieties. The main reason of yield difference was the difference of the kernel weight of different maize varieties. In the relationship of yield and related environment factors, the accumulated temperature of growth stage has the significant positive correlation with yield, and yield was increased with the accumulated temperature increase. In conclusion, this area was suitable for planting early maturity varieties, the suitable sowing date was on April 20, and the yield could reached the highest.
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