Greater sensitivity to drought accompanies maize yield increase in the U.S. Midwest

Lobell, David B., Roberts, Michael J., Schlenker, Wolfram, Braun, Noah, Little, Bertis B., Rejesus, Roderick M. and Hammer, Graeme L. (2014) Greater sensitivity to drought accompanies maize yield increase in the U.S. Midwest. Science, 344 6183: 516-519. doi:10.1126/science.1251423


Author Lobell, David B.
Roberts, Michael J.
Schlenker, Wolfram
Braun, Noah
Little, Bertis B.
Rejesus, Roderick M.
Hammer, Graeme L.
Title Greater sensitivity to drought accompanies maize yield increase in the U.S. Midwest
Journal name Science   Check publisher's open access policy
ISSN 1095-9203
0036-8075
Publication date 2014-05-02
Year available 2014
Sub-type Article (original research)
DOI 10.1126/science.1251423
Open Access Status DOI
Volume 344
Issue 6183
Start page 516
End page 519
Total pages 4
Place of publication Washington, DC, United States
Publisher American Association for the Advancement of Science
Language eng
Abstract A key question for climate change adaptation is whether existing cropping systems can become less sensitive to climate variations. We use a field-level data set on maize and soybean yields in the central United States for 1995 through 2012 to examine changes in drought sensitivity. Although yields have increased in absolute value under all levels of stress for both crops, the sensitivity of maize yields to drought stress associated with high vapor pressure deficits has increased. The greater sensitivity has occurred despite cultivar improvements and increased carbon dioxide and reflects the agronomic trend toward higher sowing densities. The results suggest that agronomic changes tend to translate improved drought tolerance of plants to higher average yields but not to decreasing drought sensitivity of yields at the field scale.
Keyword Multidisciplinary Sciences
Science & Technology - Other Topics
MULTIDISCIPLINARY SCIENCES
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID SES-0962625
NA11OAR4310095
LP100100495
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Queensland Alliance for Agriculture and Food Innovation
Official 2015 Collection
 
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