eng Science and Education Publishing Journal of Food and Nutrition Research 2333-1240 2022-04-28 10 4 321 331 10.12691/jfnr-10-4-9 JFNR20221049 article Ruixuan Hao 1 2 Hafeez Noor 2 2 3 Peiru Wang 3 3 Min Sun sm_sunmin@126.com 3 3 Fida Noor 3 Sana Ullah 3 Zhiqiang Gao 3 3 College of Agriculture, Shanxi Agriculture University, No.1, Minxian South Road, Taigu, 030801, Shanxi, China Wheat (Triticum aestivum L.) is a staple crop worldwide, and yield improvement since the green revolution was attributed to chemical nitrogen (N) fertilizer application. We conducted field experiments in Yuncheng County, Shanxi Province, under planting density (2 million plants ha每1, 2.25 million plants ha每1, 2.5 million plants ha每1) and topdressing nitrogen (12 kg ha每1, 22 kg ha每1, 32 kg ha每1). The results shown that the starch content of grains with a density of 2.5 million plants ha每1 increased by 1.9%-7.5%, which improved the water absorption of flour and the processing quality of flour, but decreased the protein content, and gluten properties of grains. The nitrogen topdressing amount of 22 kg ha每1 wheat tiller increased by 6.3%-33.3%, and the dry matter accumulation increased by 1.0%-9.5%. The number of spikes increased by 3.7%-19.2%, and the yield increased by 3.7%-17.8% with the nitrogen topping amount of 22 kg ha每1 the protein content increased by 2.0%-4.2% with the nitrogen topping amount of 22 kg ha每1, the starch content increased by 1.2%-7.2%, and the gluten index increased by 4.3%-21.5%. http://pubs.sciepub.com/jfnr/10/4/9/jfnr-10-4-9.pdf albumin protein content planting density soluble sugar wheat