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为了明确冬小麦新品种‘衡6632’的高产高效栽培技术措施,为该品种大面积应用提供理论依据,进行了不同播期和种植密度对该品种产量及其构成因素影响的研究。试验采用裂区设计,设5个播期和6个种植密度处理,于2014—2015年在河北省深州市护驾迟镇旱作节水试验站进行试验。结果表明:(1)播期对单位面积穗数、千粒重及产量有显著影响,但对穗粒数影响不显著;种植密度对产量及其构成因素均有显著影响。(2)产量随着播期的推迟和种植密度增加呈现先升高后降低的趋势。在一定范围内,‘衡6632’单位面积穗数随着播期的推迟而减少,随密度的增加而增加;穗粒数、千粒重随播期的推迟而增加。穗粒数在种植密度300万/hm~2以上时随种植密度增加而减少。千粒重随种植密度的增加而降低。研究分析表明:‘衡6632’在春一水条件下,适宜播期为10月7—19日,最佳播期为10月10—15日,相应的种植密度为225万~300万/hm~2。
In order to clarify the high-yielding and efficient cultivation techniques for a new winter wheat cultivar ’Heng 6632’, a theoretical basis for large-scale application of this variety was provided. The effects of different sowing dates and planting densities on yield and its components were studied. The experiment was conducted in a split-plot design with 5 sowing dates and 6 planting densities. The experiment was conducted in 2014-15 in the water conservancy pilot station of Guadaozao Dry Farming in Shenzhen, Hebei Province. The results showed that: (1) Sowing date had a significant effect on spikes per panicle, 1000-grain weight and yield, but had no significant effect on grain number per spike. Planting density had a significant effect on yield and its components. (2) With the delay of sowing date and the increase of planting density, the yield first increased and then decreased. Within a certain range, the panicle number per unit area of ’Heng 6632’ decreased with the delay of sowing date and increased with the increase of density. The number of grains per spike and the 1000-grain weight increased with the delay of sowing date. Spike grain number in the planting density of 3000000 / hm ~ 2 or more with planting density increases. Thousand grain weight decreased with increasing planting density. The results showed that the suitable sowing date of ’Heng 6632’ in spring and one water condition was October 7-19, the best sowing date was October 10-15, and the corresponding planting density was 2.25-3 million / hm ~ 2.