【摘要】 利用改进的深松旋耕整地机械,研究深松分层施肥技术对冬小麦分蘖、次生根、冻害、产量以及产量构成因子的影响。试验结果表明:在施肥量相同的条件下,越冬期和起身期深松处理的冬小麦单株分蘖和单株次生根数均显著高于旋耕处理。深松分层施肥技术可以促使冬小麦个体健壮,抗冻害能力增强;群体质量有所提高,单位面积穗数增加显著,增幅为8.91%,而穗粒数和千粒重变化不明显;增产效果达到显著水平,增幅为10.37%,其中深松对冬小麦增产作用显著,其贡献率为62.53%,而肥料分层深施的贡献率为37.47%。同时,深松分层施肥技术促进了肥料施用方式从撒施向机械化深施的转变,提高了肥料利用率,肥料偏生产力提高10.34%。更多还原

【Abstract】 The effects of subsoiling and layered fertilization technology on tillering,secondary root,freezing injury,yield and its components of winter wheat were studied using improved subsoiling rotary soil preparation machine.The results showed that under the same fertilizer amount,the tillering number and secondary root number per plant of subsoiling treatment in the wintering and standing periods were both significantly greater than those of rotary tillage treatment.With the subsoiling and layered fertilization technology,the winter wheat plants became stronger and the freezing resistance was enhanced; the winter wheat population quality was improved and the spikes per unit area were significantly increased by 8.91%; but the gain number per spike and 1 000- grain weight had no significant change.The yield per unit area increased by 10.37%,which reached significant level.And to which,the contribution rate of subsoiling was 62.53% while that of layered fertilization was 37.47%.Meanwhile,the subsoiling and layered fertilization technology promoted the transformation of fertilization mode from broadcasting to mechanized deep fertilizing,improved the fertilizer use efficiency,and increased the partial factor productivity by 10.34%.更多还原