播期播量对冬小麦新品种衡H116021产量及相关因素的影响

The Effects of Sowing Dates and Planting Densities on Yield and Yield Components of Winter Wheat New Cultivar “Heng H116021”

明确冬小麦新品种衡H116021的配套高产高效栽培技术措施,可为该品种推广应用提供理论依据,为此特进行不同播期和播量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5个播量处理,于2016~2017年在河北省深州市莲花池村进行。结果表明:1) 播期对穗数、穗粒数及产量有显著影响,但对千粒重影响不显著;播量对穗数、穗粒数、千粒重及产量有显著影响。2) 产量随播期推迟呈现先升高后降低趋势,随播量增加亦呈现先升高后降低趋势;在一定范围内,衡H116021穗数随播期推迟而减少,随播量增加而增加,穗粒数随播期推迟而增加,随播量增加而减少,千粒重变化随播期变化不显著。综合分析表明:衡H116021的适宜播期为10月7日~19日,相应的合理播量为11万~23万/亩基本苗。

In order to clarify the high yield and efficiency cultivation technical measures of winter wheat new cultivar “Heng H116021”, and provide a theoretical basis for large-scale application of the cultivar, it was carried out that study on the effects of sowing dates and planting densities to yield and its components of the cultivar. The trail was made use of split-plot design, including 5 sowing dates and 5 sowing rate. The trail was carried in Dry-farming and Water-saving Experiment Station located at Lianhuachi town Shenzhou City of Hebei Province during 2016~2017. The results showed: 1) The effects of sowing dates were significant on number of spike per hm2, kernels per spike, and grain yield, but not on 1000-kernel weight. The effects of planting densities were significant on kernels per spike, 1000-kernel weight, and grain yield. 2) The yield increased first and then decreased with the delay of sowing time, and also with the increase of sowing rate. In a certain range, the number of spikelets of Heng H116021 decreased with the delay of sowing time, and increased with the increase of sowing rate;the number of grains per year increased with the delay of sowing time, and decreased with the increase of sowing rate;and the change of 1000 grain weight did not change significantly with the sowing time. Analyses showed: the suitable sowing date of “Heng H116021” was October 7~19th, and the suitable sowing rate was 110~230 thousand seedlings per mu.