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以山西省1996~2015年在生产上大面积推广应用的玉米品种为材料,选取这20年间大面积推广的16个品种,考察株高、穗位高等指标,对所有品种的农艺性状和产量进行方差分析,同时对农艺性状与产量间的相关性进行分析。根据每个年代的各农艺性状、产量的平均值进行回归分析,研究农艺性状与产量随年份的变化趋势。结果表明,山西省20年间主推玉米品种的千粒重和产量随年代的演变总体呈上升趋势;株高、穗位高、穗株比、秃尖长、雌雄穗开花间隔时间和收获时含水量都是随年份的演变呈逐渐下降的趋势;穗长、穗粗、穗行数和行粒数随年代的变化无明显变化。
Taking 16 maize varieties widely popularized and applied in Shanxi Province from 1996 to 2015 as materials, 16 cultivars popularized in large scale during the past 20 years were selected to study agronomic traits and yield of all cultivars Analysis of variance, at the same time, the correlation between agronomic traits and yield was analyzed. Based on the average of each agronomic trait and yield of each generation, the regression analysis was conducted to study the trend of agronomic traits and yield with years. The results showed that the 1000-grain weight and yield of the main maize varieties in Shanxi Province increased with the evolution of the age in 20 years. The plant height, ear height, ear-ear ratio, bald length, the interval between male and male flowers and the water content at harvest were With the years of evolution showed a gradual downward trend; spike length, spike coarse, spike rows and grain number changes with age did not change significantly.