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Enhancing Grain Protein Late in Season for Irrigated Durum in Arizona

Learn about optimizing nitrogen scheduling during late season for improved protein content in durum wheat in Arizona. Explore the impact of nitrogen application and irrigation on pasta quality, cooking tolerance, firmness, color, and grain protein content.

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Enhancing Grain Protein Late in Season for Irrigated Durum in Arizona

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  1. Late Season N for Grain Protein Enhancement for Irrigated Durum M. J. Ottman, T. A. Doerge, T. L. Thompson, E. A. Riley-Saxton, E. C. Martin, S. H. Husman, and S. A. White University of Arizona

  2. Nitrogen Scheduling

  3. Pasta Quality • Cooking tolerance • Firmness • Color

  4. Crop N Content

  5. N application at anthesis (Average of 20 site years, 9 on-farm, 11 on-station)

  6. N rate at anthesis (Average of 3 cultivars, 3 irrigation levels, and 2 years)

  7. Irrigation during grain fill (Average of 3 cultivars, 3 N rates at anthesis, and 2 years)

  8. N application during grain fill (Average of 3 cultivars)

  9. Arizona Wheat • Mostly durum (> 90%) • 75% exported • Yield ~ 5500 lbs/a • Quality = General and IP

  10. Early N effects on late N Late N (lbs/a)

  11. Flag leaf N vs. Protein

  12. Stem nitrate vs. Protein

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