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试验设 5 0 0 0 ,5 5 0 0 ,6 0 0 0 ,6 5 0 0 ,70 0 0 ,75 0 0株 6 6 6 .7m2 共 6个密度 ,研究鲜食玉米沪玉糯 1号在西北地区高产制种的合理密度。结果表明 ,不同密度处理制种产量间差异达极显著水平 ,在一定范围内 ,制种产量随密度增加而增加 ,呈二次曲线变化。由回归模型得出沪玉糯 1号最佳制种密度为 74 15株 6 6 6 .7m2 。株高和穗位高随密度增加而上升 ,茎粗则略有下降 ,果穗变化较小 ,未有倒伏现象 ,表明沪玉糯 1号母本申W 2 2耐密植性好 ,合理高密度制种能获得高产量。
A total of 6 densities of 6 6 6 .7m 2 of 5 0 0 0, 5 5 0 0, 6 0 0 0, 6 5 0 0, 70 0 0, 75 0 0 were studied to study the effect of fresh corn Yuyao NO.1 Reasonable Density of High Yield Seed Production in Northwest China. The results showed that there was a significant difference in seed yield between treatments with different densities. Within a certain range, the seed yield increased with the increase of density, showing a quadratic curve. The regression model showed that the optimal seed production density of Shanghai Yuyou No. 1 was 74 15 plants 6 6 6 .7m2. The plant height and ear height increased with the increase of density, but the stem diameter decreased slightly, the change of ear diameter was small and there was no lodging phenomenon, which indicated that W 2 2 of Shanghai Yuyou No. 1 female parent was good in density tolerance and reasonable high density High yield can be obtained.