采用二次回归旋转组合设计,以丹东地区主栽玉米品种丹大17为试材,研究钾肥施用量与施用方式对玉米品质的影响.结果表明:硫酸钾做基肥时施用量为183.33～211.00 kg/hm2,做追肥时施用量为32.75～65.76 kg/hm2,在此施肥水平下玉米籽粒的蛋白质含量增加0.99％,脂肪含量增加0.50％,淀粉含量增加5.06％.钾肥做基肥和追肥分别在播种和大喇叭口期施用,可明显改善玉米品质,各项品质指标达到最佳.%With Dandal7,the commonly cultivated maize variety in Dandong district,as material, the effect of application amount and method of potassium fertilizer on maize quality was researched by quadratic regression rotation composite design. The results showed that the perfect application amount of potassium sulfate was 183. 33 - 211. 00 kg/ha as base fertilizer and 32. 75 - 65. 76 kg/ha as additional fertilizer. Under the application mode, the protein content in maize grain increased by 0. 99%, the fatty content increased by 0. 50%, and the starch content increased by 5. 06%. Potassium fertilizer used as base fertilizer in sowing period and additional fertilizer in big trumpet period could improve maize quality obviously,and all the quality indexes reached the best.
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