Effects of Nitrogen Application Strategy on Nitrogen Enzyme Activities and Protein Content in Spring Wheat Grain

Rongrong Wang, Haiqi Wang, Guiying Jiang (), Haojie Yin and Ziqiang Che
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Rongrong Wang: College of Agriculture, Shihezi University, Shihezi 832003, China
Haiqi Wang: College of Agriculture, Shihezi University, Shihezi 832003, China
Guiying Jiang: College of Agriculture, Shihezi University, Shihezi 832003, China
Haojie Yin: College of Agriculture, Shihezi University, Shihezi 832003, China
Ziqiang Che: College of Agriculture, Shihezi University, Shihezi 832003, China

Agriculture, 2022, vol. 12, issue 11, 1-17

Abstract: The aim of this study was to determine the regulatory effect of different nitrogen (N) fertilizer application rates on the grain N metabolism enzymes and protein content of drip-irrigated spring wheat under the climatic conditions in Xinjiang, China. A split plot experiment was conducted with strong gluten wheat Xinchun 38 (XC 38) and medium gluten wheat Xinchun 49 (XC 49) as experimental materials. We set up seven nitrogen treatments, in amounts of 300 (Nck), 285 (N5), 270 (N10), 255 (N15), 240 (N20), 225 (N25) and 0 (N0) kg hm −2 . The effects of N application rate on nitrate reductase (NR), glutamine synthetase (GS), glutamate-pyruvate aminotransferase (GPT), protein content, protein composition, and yield of wheat grain were studied. The results showed that NR, GS, GPT, protein content, albumin, globulin, glutenin, gliadin, and yield first increased and then decreased with the decrease in N application. Furthermore, different responses to different applications between different wheat varieties was also observed. The indexes of XC 38 reached the maximum in the N15 treatment, and the yield increased 2.99~81.45%. XC 49 showed the best indicators under the N25 treatment and the yield increased 0.37~71.29%. Under the same N level, all indicators of XC 38 were better than XC 49. Correlation analysis showed that the yield and protein yield were significantly positively correlated with NR, GS, and GPT. The interaction of N fertilizer and variety had significant effects on NR, GS, GPT, protein content, components, and yield. These results show that the protein content and yield of wheat grain can be improved by reasonably adjusting the N fertilizer application strategy.

Keywords: Triticum aestivum L.; nutrient; nitrogen metabolism; yield (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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