Effects of Nitrogen Application Amount on Protein Components in Grain of Different Varieties Wheat

Under the condition of higher soil fertility,effects of nitrogen application amount on protein content,its components content,percentage of each component content to total protein content and processing quality were studied by using two strong-gluten wheat varieties(Linyou145 and Zhengmai9023) and two weak-gluten wheat varieties(Ningmai9 and Baofeng949).The results indicated that adding the amount of N-fertilizer could increased the contents of protein and its components.The contents of total protein,globulin,gliadin and glutenin all increased significantly with the amount of N-fertilizer added,but the effect of nitrogen application amount on albumin content was not remarkable.The effects of nitrogen application amount on the percentage of each protein component content to total protein content were not remarkable,and the percentage of each protein component content to total protein content was relatively stable.Adding the amount of N-fertilizer increased sedimentation volue,wet gluten content,loaf volume and loaf value,and decreased test weight of grain.