eng Science and Education Publishing Journal of Food and Nutrition Research 2333-1240 2022-03-01 10 3 188 199 10.12691/jfnr-10-3-3 JFNR20221033 article Hafeez Noor 1 2 3 Ruixuan Hao 3 3 Peiru Wang 3 3 Aixia Ren 3 3 Min Sun sm_sunmin@126.com 3 3 Kong Weilin 3 3 Zhang Jing Jing 3 3 Sana Ullah 3 Fida Noor 3 Pengcheng Ding 3 3 Zhiqiang Gao 3 3 College of Agriculture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China In order to explore the optimum amount of nitrogen application of winter wheat, a field experiment was conducted at Wenxi experimental site of Shanxi Agriculture Wenxi. Nitrogen application significantly increased the Net Photosynthesis Rate (PN), intercellular carbon dioxide concentration (Ci) and transpiration rate (E) of post-anthesis flag leaves. Compared to other nitrogen application rates, 210 kg ha每1 was the best compared to other nitrogen application rates, with the nitrogen of 210 kg ha每1 nitrogen application increased nitrogen accumulation in all growth stages. The content of each protein component increased. With 210 kg ha每1 of nitrogen application, the albumin, globulin, prolamin, and glutenin was high in content and showed no significant with those of 240 kg ha每1 application rate. The protein yield at 210 kg ha每1 were significantly improved compared to other nitrogen application rates. The prolamin and glutenin (storage protein) were the highest at 210 kg ha每1. Significantly improved the protein yield at 210 kg ha每1 compared to other nitrogen application rates. http://pubs.sciepub.com/jfnr/10/3/3/jfnr-10-3-3.pdf Dryland wheat N uptake efficiency protein soluble sugar starch photosynthesis characteristic