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Nitrogen utilization efficiency in wheat: A global perspective

de Oliveira Silva, Amanda ; Ciampitti, Ignacio A. ; Slafer, Gustavo A. ; Lollato, Romulo P.

European journal of agronomy, 2020-03, Vol.114, p.126008, Article 126008 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Nitrogen utilization efficiency in wheat: A global perspective
  • Autor: de Oliveira Silva, Amanda ; Ciampitti, Ignacio A. ; Slafer, Gustavo A. ; Lollato, Romulo P.
  • Assuntos: Nitrogen economy ; Nitrogen use efficiency ; Synthesis analysis ; Triticum aestivum L ; Wheat
  • É parte de: European journal of agronomy, 2020-03, Vol.114, p.126008, Article 126008
  • Descrição: •New synthesis-analysis offers insights on trends in wheat N utilization efficiency.•A nonlinear model explained wheat grain yield as a function of N uptake (i.e. NUtE).•There are greater opportunities to increase NUtE in fall- than winter-sown wheat.•Increases in NUtE originated from dilution of grain protein concentration.•Identifying the determinants of NUtE will increase yield limited by N uptake. Understanding factors underpinning the variability in nitrogen (N) utilization efficiency (NUtE) [i.e. grain yield per unit of N uptake at maturity (NupMAT)] is critical to direct future improvements in breeding and agronomic management. To our knowledge, no study has summarized changes in wheat NUtE across a wide range of experimental conditions. We performed a synthesis-analysis using published data to provide a global perspective of NUtE trends in wheat by (i) benchmarking against yield limited by NupMAT, and (ii) assessing factors contributing to the variation in NUtE. The final database encompassed 55 studies (n = 529). A nonlinear model explained yield as a function of NupMAT. The gap between actual yield and NupMAT-limited yield was negligible at the lowest range of NupMAT and increased to ∼2000 kg ha−1 as NupMAT levels increased. Hence, opportunities to enhance yield through improving NUtE would be more likely at greater-than-average yield and NupMAT levels. The negative correlation between grain protein concentration and the residuals between NUtE and NupMAT indicated a challenge to increase yield without penalizing grain protein. Further, there are greater opportunities to increase NUtE in fall- than winter-sown wheat. Identifying the determinants of NUtE will enable to narrow the gap between actual and NupMAT-limited yields.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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