| In order to understand the effects of nitrogen,potassium and their interactions on quality characteristics of winter wheat with different gluten type,two varieties with strong and weak gluten,Zhengmai9023 and Yumai50,were cultivated under the field condition.The results indicated that the regulation effect of nitrogen,potassium and their interactions on main basic quality characteristics,farinograms and extensograms of Zhengmai9023 was higher than on those of Yumai50,but the regulation effect on the properties of starch pasting was opposite.Nitrogen decreased kernel hardness and increased gluten content of two wheat cultivars,and had positive influence on water absorption,development time,degree of softening,extension area and extensibility.Potassium significantly prolonged the development time and stability time of Zhengmai9023.As for the rheological parameters,potassium had negative influence on Yumai50 and positive influence on Zhengmai9023.With the compounded application of nitrogen and potassium,the water absorption,degree of softening,gluten content and extensibility of both Zhengmai9023 and Yumai50 were increased,while the extensible resistance and maximum resistance was reduced;the development time and stability time of Zhengmai9023 was significantly prolonged.Nitrogen,potassium and their compounded application had positive influence on the starch pasting properties of Yumai50 except for breakdown value,and the effect of nitrogen was the highest;however,they had negative influence on the starch pasting properties of Zhengmai9023 except for breakdown value,and the effect of compounded application of nitrogen and potassium was the highest. |