DOI: 10.1016/j.eja.2020.126008
论文题名: Nitrogen utilization efficiency in wheat: A global perspective
作者: de Oliveira Silva A. ; Ciampitti I.A. ; Slafer G.A. ; Lollato R.P.
刊名: European Journal of Agronomy
ISSN: 11610301
出版年: 2020
卷: 114 语种: 英语
英文关键词: Nitrogen economy
; Nitrogen use efficiency
; Synthesis analysis
; Triticum aestivum L.
; Wheat
Scopus关键词: benchmarking
; concentration (composition)
; crop yield
; experimental study
; global perspective
; nitrogen
; nonlinearity
; nutrient use efficiency
; protein
; wheat
; Triticum aestivum
英文摘要: 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. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158851
Appears in Collections: 气候变化与战略
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作者单位: Department of Agronomy, Kansas State University, 2004 Claflin Rd, Manhattan, KS 66506-0110, United States; Department of Crop and Forest Sciences, University of Lleida - AGROTECNIO Center, Av. Rovira Roure 191, Lleida, 25198, Spain; ICREA (Catalonian Institution for Research and Advanced Studies), Barcelona, Spain
Recommended Citation:
de Oliveira Silva A.,Ciampitti I.A.,Slafer G.A.,et al. Nitrogen utilization efficiency in wheat: A global perspective[J]. European Journal of Agronomy,2020-01-01,114