3个玉米杂交种的丰产稳产性分析

Analysis on Productivity and Stability of Three Maize Hybrids

采用Eberhart-Russell模型和高稳系数法,对3个玉米杂交种的丰产稳产性进行了综合评定。结果表明,杂交种正红2号、正红6号和正红115区试平均产量分别为7575.0kg/hm2、7611.8kg/hm2和7304.0kg/hm2,分别比对照增产10.2%、16.6%和6.2%,丰产性突出,稳产性较好,生态适应性强。3个杂交种在环境指数4500～9000kg/hm2时比对照均有不同程度的增产。在生产水平6000kg/hm2以上的地区更能充分发挥正红2号的增产增收潜力。

The productivity and yield stability of three maize hybrids were evaluated through Eberhart-Russell＇ s model and high stable yielding coefficient method. The results showed that the average yield of hybrid Zhenghong 2, Zhenghong 6 and Zhenghong 115 were 7 575.0 kg/ha, 7 611.8 kg/ha and 7 304.0 kg/ha, with 10.2%, 16.6% and 6.2% yield increase respectively compared with the check hybrid, which have high productivity and yield stability with fine ecological adaptation. Three hybrids have some degree yield increase in environment index between 4 500 kg/ha and 9 000 kg/ha, however, it would bring Zhenghong 2 to bear more abundant capacity of yield and income increase in the region of production level over 6 000 kg/ha.