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  The upper homeostatic range for the temperature–yield response of irrigated US wheat down revised from a theoretical and experimental perspective

Wechsung, F., Ritter, M., Wall, G. W. (2021): The upper homeostatic range for the temperature–yield response of irrigated US wheat down revised from a theoretical and experimental perspective. - Agricultural and Forest Meteorology, 307, 108478.
https://doi.org/10.1016/j.agrformet.2021.108478

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 Creators:
Wechsung, Frank1, Author              
Ritter, M.2, Author
Wall, G. W.2, Author
Affiliations:
1Potsdam Institute for Climate Impact Research, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: High temperature (HT) and drought (D) have detrimental effects on growth and phenology that result in reductions of the yields of agricultural crops. Nevertheless, homeostatic ranges of tolerance exist. Recent analysis of survey data and simulations suggest US wheat (Triticum aestivum L.) yields remain relatively stable under irrigation in the range of 35°– 40°C. Applying analogue statistical procedures on experimental data and simulations from the Hot Serial Cereal Experiment (HSC) we demonstrate that failed incorporation of the corresponding phenological acceleration due to HT and a low interannual temperature variability lead to this result. Here, we incorporate the phenological effect into the used binned temperature exposure yield model by rescaling (normalizing) the absolute seasonal temperature counts to a maximum season length. The application to observed and simulated HSC data with a wide temperature range reveals that the suggested upper homeostatic response limit of US wheat yields to HT requires a down–revision. HT stress can be reduced by transpirational cooling. However, the effect is currently not sufficient to expand the homeostatic range of irrigated wheat markedly beyond 25°C taking our analysis of the HSC experiment.

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 Dates: 2021-05-102021-06-102021-06-10
 Publication Status: Finally published
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: MDB-ID: No data to archive
Organisational keyword: RD2 - Climate Resilience
Working Group: Hydroclimatic Risks
PIKDOMAIN: RD2 - Climate Resilience
DOI: 10.1016/j.agrformet.2021.108478
Research topic keyword: Climate impacts
Research topic keyword: Extremes
Research topic keyword: Food & Agriculture
Regional keyword: North America
Model / method: Qualitative Methods
 Degree: -

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Title: Agricultural and Forest Meteorology
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 307 Sequence Number: 108478 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals15
Publisher: Elsevier