栽培措施对弱筋小麦品种扬麦20产量、品质和氮肥农学利用率的影响

摘要

A weak-gluten wheat cultivar Yangmai 20 was used to investigate the effects of sowing date, plant density and nitrogen rate on yield, quality and nitrogen agronomic efficiency(NAE) in a field experiment. The results showed that sowing date, nitrogen rate and plant density had significant effect on the yield. The spike number and thousand grain weight were the key factors in the formation of Yangmai 20, the quality traits and NAE were mainly affected by sowing date and nitrogen rate. Grain protein content increased significantly and NAE reduced significantly with the increase of nitrogen rate. In this experiment, when sown on November 4, the recommended plant density and nitrogen rate were 2.25×106 plants per hectare and 180 kg/hm2, the yield and quality of Yangmai 20 were most coordinated, and the NAE could reach 12. 92 kg/kg.%以弱筋小麦扬麦20为研究对象,采取田间裂区试验,研究了播期、播种密度和施氮量对其产量、品质和氮肥农学利用率的影响.结果表明,播期、施氮量和密度都对产量具有显著影响,穗数和千粒质量是扬麦20产量形成的关键因子,品质性状和氮肥农学利用率主要受播期和施氮量影响,随着施氮量增加,籽粒蛋白质含量显著升高,氮肥农学利用率显著降低.本试验中扬麦20在播期11月4日,密度每1 hm22.25×106,施氮量180 kg/hm2处理下,产量和弱筋品质最为协调,氮肥农学利用率可达12. 92 kg/kg.