4.3 Article

Response of Wheat Cultivars to Nitrogen and Sulfur for Crop Yield, Nitrogen Use Efficiency, and Protein Quality in the Semiarid Region

Journal

JOURNAL OF PLANT NUTRITION
Volume 32, Issue 10, Pages 1768-1787

Publisher

TAYLOR & FRANCIS INC
DOI: 10.1080/01904160903152616

Keywords

amino acid composition; N-S interaction; N:S ratio and nitrogen use efficiency

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Funding

  1. Ministry of Foreign Affairs, Norway
  2. Mekelle University
  3. Norwegian Education Loan Bank (Lanekassen, Norway)

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The effects of nitrogen (N at 0, 100 and 180 kg N ha-1) and sulfur (S at 0, 20, 40 and 60 kg S ha-1) on crop yield, nutrient uptake, nitrogen use efficiency (NUE), and amino acid composition of two bread wheat cultivars, 'Shehan' and 'Enkoy,' grown in Andisols and Cambisols in randomized blocks with three replications were evaluated. Both cultivars responded significantly (P 0.05) to N and S applications and S application with N improved the NUE by 28%. The yield increase for the two cultivars by N and S application ranged between 0.8 to 2.4 Mg ha-1. The N concentration increased significantly from N0 to N2 in both cultivars. Sulfur fertilization increased the concentration of cysteine and methionine by 27% and 14%, respectively, as compared to N alone. The grain yield, NUE, N, and S uptake, and the S-amino acid concentration of 'Enkoy' were significantly higher than 'Shehan' cultivar.

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