辽宁省玉米高密中晚熟和中晚熟区域试验产量变化趋势分析

对辽宁省2006~2012年高密中晚熟组和中晚熟组参试组合的产量数据进行分析,从中看出两密度组参试品种的产量变化趋势,7年间参试组合的平均产量和最高产组合产量高密中晚熟组比中晚熟组增加幅度大,至2011年参试组合最高产量高密中晚熟组已经超过中晚熟组,平均产量接近中晚熟组。由此可见,辽宁省中晚熟高密品种的产量水平已经有了很大提高,密植增产的作用是明显而有效的。提醒育种家在今后的育种实践中,应侧重对耐密品种的选育。

Analysis On Yield Trending of Maize Varieties in High-Density Mid-late-maturing and Mid-Late-maturing Regional Test of Liaoning Areas

The yield of maize have been analyzed in high-density mid-late-maturing group and mid-late-matu- ring group regional test in Liaoning Province during 2006 - 2012. The trend of variety yield was shown be- tween the groups in the seven years. The maize maximum yield and average yield of high density mid-late group increased higher than mid-late group. The maximum yield of high-density mid-late group had been more than mid-late group as of 2011, the average yield of high-density mid-late group had been closed to mid-late. So the production of high-density mid-late varieties has been greatly improved. It was obvious and effective for increasing yield to plant high-density mid-late varieties in Liaoning Province. All these proved that breeders should focus on the variety of dense planting varieties in breeding practice.