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通过田间小区试验,研究不同氮钾配比对玉米不同生育期和不同器官的干物质积累、分配、运转和产量及对品质的影响。结果表明,施氮量为150 kg/hm2、施钾量为100 kg/hm2的处理在成熟期茎、叶、穗干物质量、阶段子粒干物质积累量、茎部转运量、转运率、贡献率以及玉米子粒产量、子粒蛋白质与淀粉含量均高于其他处理。因此,氮、钾肥施用量为150 kg/hm2和100 kg/hm2有利于寒地玉米的干物质积累、产量及其品质的提高。
Field trials were conducted to study the effects of different N and K ratios on dry matter accumulation, distribution, turnover, yield and quality of maize at different growth stages and organs. The results showed that dry matter, dry matter accumulation at stage, dry matter accumulation at stem, translocation, translocation rate, and contribution rate of stems, leaves and ears at maturity were the highest at 150 kg / hm2 and 100 kg / As well as maize grain yield, grain protein content and starch content were higher than other treatments. Therefore, nitrogen and potassium fertilizer application rate of 150 kg / hm2 and 100 kg / hm2 is conducive to dry matter accumulation in winter maize, yield and quality improvement.