Irrigation offsets wheat yield reductions from warming temperatures

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Video in TIB AV-Portal: Irrigation offsets wheat yield reductions from warming temperatures

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Irrigation offsets wheat yield reductions from warming temperatures
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CC Attribution 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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2017
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English

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Abstract
Temperature increases due to climate change are expected to cause substantial reductions in global wheat yields. However, uncertainty remains regarding the potential role for irrigation as an adaptation strategy to offset heat impacts. Here we utilize over 7000 observations spanning eleven Kansas field-trial locations, 180 varieties, and 29 years to show that irrigation significantly reduces the negative impact of warming temperatures on winter wheat yields. Dryland wheat yields are estimated to decrease about eight percent for every one-degree Celsius increase in temperature, yet irrigation completely offsets this negative impact in our sample. As in previous studies, we find that important interactions exist between heat stress and precipitation for dryland production. Here, uniquely, we observe both dryland and irrigated trials side-by-side at the same locations and find that precipitation does not provide the same reduction in heat stress as irrigation. This is likely to be because the timing, intensity, and volume of water applications influence wheat yields, so the ability to irrigate—rather than relying on rainfall alone—has a stronger influence on heat stress. We find evidence of extensive differences of water-deficit stress impacts across varieties. This provides some evidence of the potential for adapting to hotter and drier climate conditions using optimal variety selection. Overall, our results highlight the critical role of water management for future global food security. Water scarcity not only reduces crop yields through water-deficit stress, but also amplifies the negative effects of warming temperatures.

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irrigation offsets will yield reductions from warming temperatures an
article published in the environment research letters in 2017 the
authors are Jesse Tak in Berkeley and in Endre in the Department of Agricultural Economics at Kansas State University climate change is expected to result
in lower wheat yields in the future here we studied the impact of irrigation on wheat deals with careful attention to the interactions between temperature rainfall irrigation We'll data are taken from
Kansas where we parade tests shown here where each frame was identified by a white sign dataset is huge with 29 years covering 1985 to 2013 11 locations of drying land in irrigated plots at identical locations which is a major strength of the dataset and we also have 180 varieties Ryland we
overestimated decrease about 8 per cent for every 1 degree Celsius increase in temperature yet irrigation is found to completely offset this negative impact in our sample and this diagram you can
see a large and significant effects of heat on dry land we yields at higher temperatures whereas irrigated wheat yields remain about the same in this figure we
can see the increasing impact of heat on trial and reveals where it's irrigated riyals stage about the same demonstrating that irrigation can completely offset the impacts of warming temperatures a new research result which we find in this paper
precipitation does not provide the same reduction in heat stresses irrigation likely because the timing the intensity and volume water applications effect we yields there wide differences in water deficit stress acts across varieties demonstrating some evidence for the potential to adapt to he and will precipitation using variety selection Our results highlight the critical role water future global food security water scarcity reduces crop yields the water deficit stress can
amplifies the negative effects of warmer temperatures we hope that you find this interesting and take a look at the new article in environmental research letters and
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