Effect of Nitrogen Application Rate on Dynamic Changes of Grain Protein and Composition Content in Wheat

Linyou 7287 were used to study protein content and the accumulation of its components under the different levels of nitrogen in the process of wheat grain formation.The results showed that the changes of wheat grain protein content had the same tendency of high-low-high under different levels of nitrogen.Content of protein components showed two types of high-low and low-high,of which,albumin and globulin showed a high-low trend,gliadin and glutenin showed low-high trend.Nitrogen application rate showed less effect on the accumulation laws of grain protein content and its components,but improving their accumulation in volume.Study of mature grain protein components indicated that the best-quality grain was obtained when application of nitrogen reached to 225 kg/hm2.