播期与密度对襄麦D51产量及其构成因素的影响

Effects of Sowing Date and Planting Density on Yield and Yield Components of Wheat Variety Xiangmai D51

为探索小麦新品种襄麦D51的适宜播期与密度组合,于2016—2017年在襄阳市农业科学院以襄麦D51为材料进行了播期与密度的裂区二因素试验。结果表明,不同播期处理条件下,单位面积有效穗数差异不显著,每穗粒数和平均产量随播期推迟显著提高,千粒重随播期推迟显著下降;不同播种密度条件下,有效穗数、千粒重和平均产量差异均不显著,每穗粒数随密度增加显著下降。平均产量的播期与密度互作效应显著,最佳播期为11月4日、播种密度为每公顷315万基本苗。

To investigate the optimum combination of sowing date and planting density for a newly bred wheat variety Xiangmai D51, a field experiment with split plot design was conducted at Xiangyang Academy of Agricultural Sciences in Hubei province during 2016-2017 growing season with Xiangmai D51 as material. Results showed that the spike number per hm^2 had no significant difference under different sowing date treatment, the number of grains per spike and the average yield were significantly increased, and the 1000-grain weight was decreased significantly with the delay of sowing date; under different planting density, no significant difference was found in the spike number per hm^2, 1000-grain weight and the average yield. The number of grains per spike was significantly decreased by increasing planting density. The average yield had significant interaction effect between sowing date and planting density, the best combination of sowing date and planting density was November 4 th and 315×10~4/hm^2.