Effects of Sowing Dates and Planting Densities on Yield and Yield Components of Winter Wheat New Cultivar Heng4399
Objective] To clarify the high-yield and efficient cultivation technical measures of winter wheat new cultivar Heng4399, and to provide theoretical basis for large-scale application of the cultivar.[ Method] Split plot design was used to carry out treatments of seven sowing periods and six planting densities.Effects of sowing dates and planting densities on the yield and yield components of cultivar Heng4399 were researched in in Dry-farming and Water-saving Experiment Station located at Hujiachi Town in Shenzhou City of Hebei Province during 2008-2009.[Result] Sowing date had significant effects on the number of spikes per unit area, 1 000-kernel weight and grain yield, but showed no significant effects on kernels per spike.Planting density had significant effects on both yield and yield components.With the delay of sowing date and the increase of planting density, yield firstly enhanced and then reduced.Within a certain range, the number of spikes per unit area reduced as the sowing date delayed, and increased as the planting density enhanced.Kernels per spike was less affected by sowing date and planting density.1 000-kernel weight increased as the sowing date delayed, but declined as the planting density increased.[Conclusion] Through the regression equation simulation calculation, it is recommended that the suitable sowing date of Heng4399 is October 6-21, and its reasonable basic planting density is 2 100 thousand-3 600 thousand plants/hm2 .
国家科技期刊平台
NSTL
万方数据
维普
