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Agronomy 2017, 7(1), 20; doi:10.3390/agronomy7010020

Using FACE Systems to Screen Wheat Cultivars for Yield Increases at Elevated CO2

Crop Systems and Global Change Laboratory, USDA-ARS, Beltsville Agricultural Research Center, 10300 Baltimore Avenue, Beltsville, MD 20705-2350, USA
Academic Editor: Peter Langridge
Received: 21 November 2016 / Revised: 27 January 2017 / Accepted: 20 February 2017 / Published: 24 February 2017
(This article belongs to the Special Issue Impact of CO2 Concentration and Enrichment on Crops)
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Abstract

Because of continuing increases in atmospheric CO2, identifying cultivars of crops with larger yield increases at elevated CO2 may provide an avenue to increase crop yield potential in future climates. Free-air CO2 enrichment (FACE) systems have most often been used with multiple replications of each CO2 treatment in order to increase confidence in the effect of elevated CO2. For screening of cultivars for yield increases at elevated CO2, less precision about the CO2 effect, but more precision about cultivar ranking within CO2 treatments is appropriate. As a small-scale test of this approach, three plots, each of four cultivars of wheat, were grown in single FACE and control plots over two years, and the cultivar rankings of yield at elevated and ambient CO2 were compared. Each replicate plot was the size used in traditional cultivar comparisons. An additional test using four smaller replicate plots per cultivar within one FACE and one ambient plot was used to compare nine cultivars in another year. In all cases, elevated CO2 altered the ranking of cultivars for yield. This approach may provide a more efficient way to utilize FACE systems for the screening of CO2 responsiveness. View Full-Text
Keywords: wheat; elevated CO2; free-air carbon dioxide enrichment; screening; yield wheat; elevated CO2; free-air carbon dioxide enrichment; screening; yield
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bunce, J. Using FACE Systems to Screen Wheat Cultivars for Yield Increases at Elevated CO2. Agronomy 2017, 7, 20.

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