Wheat grain yield decreased over the past 35 years, but protein content did not change

Author:

Bloom Arnold J1ORCID,Plant Richard E2

Affiliation:

1. Department of Plant Sciences, University of California at Davis, Davis, CA, USA

2. Department of Plant Sciences and Biological and Agricultural Engineering, University of California at Davis, Davis, CA, USA

Abstract

Abstract The extent to which rising atmospheric CO2 concentration has already influenced food production and quality is uncertain. Here, we analyzed annual field trials of autumn-planted common wheat in California from 1985 to 2019, a period during which the global atmospheric CO2 concentration increased 19%. Even after accounting for other major factors (cultivar, location, degree-days, soil temperature, total water applied, nitrogen fertilization, and pathogen infestation), wheat grain yield and protein yield declined 13% over this period, but grain protein content did not change. These results suggest that exposure to gradual CO2 enrichment over the past 35 years has adversely affected wheat grain and protein yield, but not grain protein content.

Funder

USDA

NSF

Publisher

Oxford University Press (OUP)

Subject

Plant Science,Physiology

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