Effect of Nitrogen Apllication Amount on Protein and Its Components in Grain of Winter Wheat

Under the condition of high organic matters(OM) soil,effects of nitrogen application amount on protein content,its components content and percentage of each component content to total protein content were studied using two strong-gluten wheat varieties(Linyou 145 and Zhengmai 9023) and two weak-gluten wheat varieties(Ningmai 9 and Baofeng 949).The results indicated that increasing the amount of N-fertilizer could increase 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 increasing,but the effect of nitrogen application amount on albumin content was not remarkable.The difference of storage protein content between strong-gluten wheat and weak-gluten wheat was remarkable,but the difference of soluble protein content was not remarkable.The difference of soluble protein content among varieties increased with the amount of N-fertilizer increase,but the difference of storage protein content decreased.The effects of nitrogen application amount on the percentage of each protein component content to total protein content were not remarkable,and the effects of nitrogen application amount on the percentage of each protein component content to total protein content were different among different varieties.