小麦新品种 ‘皖麦68’ 的密度和行距效应研究

为了明确不同密度和行距对小麦新品种‘皖麦68’产量及产量构成的影响,采用二次D-饱和最优设计,分析了‘皖麦68’密度和行距的产量等效应,得出综合效应方程。结果表明：密度对产量都是正效应,行距对产量是负效应,二者对产量的交互作用是负效应。对产量结构的影响是,密度和行距对穗数是正效应,对穗粒数是负效应,对千粒重的影响较小。密度为357.45万/hm2,行距为19.03 cm时,‘皖麦68’的最高产量达9215.6 kg/hm2;最理想的产量结构是穗数为624.48万/hm2,穗粒数40.05粒,千粒重39.13 g。综合极值区间,确定了淮北地区‘皖麦68’产量在9000 kg/hm2以上的播种密度范围是326.6-360.3万/hm2,行距是19-20cm。

Effects of Density and Row Spacing on the yield of New Wheat Variety ＇ Wanmai 68＇

We adopted 2D - saturation optimum design to determine the effects of density and row spacing on the yield of ＇Wanmai 68＇, and obtained comprehensive effect equation. The results showed that the density has a positive effect on yield, but the effect of the spacing was opposite. The interactions of 2 factors were negative. The density and spacing were positive for spike number, but negative for kernels per spike, and had less effect on the thousand kernel weight. The peak production of ＇Wanmai 68＇ reached 9215.6 kg/hm2, while the density was 3.5745 million/bin2, and the spacing was 19.03 era. The optimal yield components were 6.2448 million for spike number, 40.05 for kernels per spike, and 39.13 g for the thousand kernel weight. Synthesizing the extremum interval, the authors determined the seeding density of ＇Wanmai 68＇ in Huaibei Region was 3.266-3.603 million/hm2, spacing was 19-20 cm, and the production was more than 9000 kg/hm2.