氮钾配施对强筋小麦济麦20产量和品质的影响

为了给强筋小麦品种济麦20优质高产配套栽培提供理论依据及技术支撑，在大田高产栽培条件下，研究了氮钾肥施用量及其配比对强筋小麦品种济麦20产量和品质的影响。结果表明，氮和钾及其互作对小麦籽粒产量及其构成因素的影响均达到显著或极显著水平，以每公顷施氮225kg、K2O150kg的处理产量最高。随着氮和钾肥的增加出粉率和容重均呈先增加后降低的变化趋势，籽粒蛋白质含量和湿面筋含量、沉降值均随施氮量增加而增加，籽粒蛋白质含量和湿面筋含量在每公顷施K2O 0-150Kg范围内随施钾量的增加而增多，到每公顷施K2O 210kg的处理反而降低，而沉降值随着钾肥的增加而降低。氮钾配比对籽粒蛋白质含量的影响未达到显著水平，但对湿面筋含量、沉降值的影响达到显著水平。氮肥能提高小麦面团的弹性，钾肥则提高了面团的延伸性，氮钾配比极显著提高了拉伸面积。

Effects of nitrogen application combined with potassium on yield and quality of strong gluten wheat 'Jimai 20'

Abstract: In order to provide theoretical basis and technological for high-quality and high-yield cultivation of a strong gluten wheat variety,Jimai 20,the experiment studied effects of the radio of nitrogenous fertilizer and potassic fertilizer on yield and qualitly of Jimai 20 under the field conditions with High-yield cultivation。The results showed that the effects of nitrogen and potassium and their interaction on wheat grain yield and its component factors had reached significant level or very significant level,and the handling of N 225 kg、K2O 150kg per hectare had the highest yield. With the increasing application of nitrogen and potassium , flour yideld and bulk density showed the trend of first increase then decrease, grain protein content and wet gluten content, the sedimentation value increased with the nitrogen . In the range of application K2O 0 to 150 Kg per hectare ,Grain protein content and wet gluten content increased with the potassium, When reached to 210 per hectare they decreased,and sedimentation value decreased with the potassium. The combined application of N and K haven’t significant effects on grain protein content, but the effects have achieved significant levels on wet gluten content and sedimentation value. Nitrogen fertilizer can increase the elasticof wheat dough, potassium fertilizer can improve the doughy extensibility,and the combined application of N and K can significantly increase the extension area.