Wheat responses to a wide range of temperatures: The hot serial cereal experiment

B. A. Kimball, J. W. White, G. W. Wall, M. J. Ottman

Research output: Chapter in Book/Report/Conference proceedingChapter

5 Scopus citations

Abstract

Concomitant with the increase in Earth's atmospheric CO2 concentration, temperatures are warming on a global scale. Crop growth models are useful tools to predict the likely effects of these global changes on agricultural productivity and to develop strategies to maximize the benefits and minimize the detriments of such changes. However, few models have been tested at the higher temperatures expected in the future. Therefore, we conducted an experiment, termed the Hot Serial Cereal Experiment, on wheat (Triticum aestivum L.)-the world's foremost food and feed crop-to obtain a dataset appropriate for testing the high-temperature performance of wheat growth models. Wheat was planted serially about every 6 wk for over 2 yr at Maricopa, AZ, USA, which experiences the whole range of temperatures at which plants grow on Earth. In addition, on six planting dates, infrared heaters in a temperature free-air controlled enhancement (T-FACE) system were deployed over one-third of the plots to warm the plots by an additional 1.5°C during daytime and 3.0°C at night. Overall, a dataset covering 27 differently treated wheat crops was obtained covering an air temperature range from -2 to +42°C. Crop grain yields ranged from 0 to 800 g m-2. Crops planted in midwinter (normal planting time) yielded the most, as expected. Crops planted in fall suffered frost damage that was ameliorated by T-FACE warming, whereas spring-planted crops had lower yields that were exacerbated by T-FACE. Summer-planted crops failed. Regressions against season-long average air temperature revealed a lethal temperature of 32°C or higher.

Original languageEnglish (US)
Title of host publicationImproving Modeling Tools to Assess Climate Change Effects on Crop Response
PublisherWiley
Pages33-44
Number of pages12
Volume7
ISBN (Electronic)9780891183525
ISBN (Print)9780891183518
DOIs
StatePublished - Dec 12 2016

Keywords

  • Air temperature
  • Canopy temperature
  • High-temperature performance
  • Hot Serial Cereal Experiment
  • Soil temperature
  • Temperature free-air controlled enhancement system
  • Wheat growth models

ASJC Scopus subject areas

  • Engineering(all)
  • Agricultural and Biological Sciences(all)

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