氮肥运筹对小麦光明麦1号群体指标及籽粒产量的影响

目的]筛选适宜中筋小麦光明麦1号高产高效栽培的氮肥运筹方式。方法]研究不同施氮量和基追比例对光明麦1号群体指标及籽粒产量的影响。结果]随施氮量增加,光明麦1号群体茎蘖数、籽粒产量呈先上升后下降的趋势。同一施氮水平下,基追比例为5∶5的处理成熟期茎蘖数和茎蘖成穗率最高;籽粒产量也显著高于基追比例为6∶4、7∶3、8∶2的处理。结论]在该试验条件下,施氮量为300 kg/hm2、基追比例为5∶5时,穗下节间长占总长比例最高,籽粒产量也最高。

Effects of Nitrogen Management on Population Traits and Grain Yield of Wheat Cultivar Guangmingmai 1

Objective]To screen nitrogen management for high yield and superior quality cultivation of wheat Guangmingmai 1.Method]Effects of nitrogen amounts and ratio of nitrogen on population traits and grain yield were studied.Result]With the increase of nitrogen content,stem tiller number and grain yield showed a changing trend of up at first and then down .Under the same nitrogen application level,the stem tiller num-ber and stem tillers earing rate under the ratio of 5∶5 treatment were the highest,grain yield was also significantly higher than the treatment of 6∶4、7∶3 and 8∶2.Conclusion]Under the conditions of this experiment,when the nitrogen amounts was 300 kg/hm2 and the ratio of base N to dressing N was 5∶5,the percentage of internode length below spike was the highest,and the grain yield was also the highest.