Intensity of heat stress in winter wheat—phenology compensates for the adverse effect of global warming

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Video in TIB AV-Portal: Intensity of heat stress in winter wheat—phenology compensates for the adverse effect of global warming

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Intensity of heat stress in winter wheat—phenology compensates for the adverse effect of global warming
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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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2015
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English

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Abstract
Higher temperatures during the growing season are likely to reduce crop yields with implications for crop production and food security. The negative impact of heat stress has also been predicted to increase even further for cereals such as wheat under climate change. Previous empirical modeling studies have focused on the magnitude and frequency of extreme events during the growth period but did not consider the effect of higher temperature on crop phenology. Based on an extensive set of climate and phenology observations for Germany and period 1951–2009, interpolated to 1 × 1 km resolution and provided as supplementary data to this article (available at stacks.iop.org/ERL/10/024012/mmedia), we demonstrate a strong relationship between the mean temperature in spring and the day of heading (DOH) of winter wheat. We show that the cooling effect due to the 14 days earlier DOH almost fully compensates for the adverse effect of global warming on frequency and magnitude of crop heat stress. Earlier heading caused by the warmer spring period can prevent exposure to extreme heat events around anthesis, which is the most sensitive growth stage to heat stress. Consequently, the intensity of heat stress around anthesis in winter crops cultivated in Germany may not increase under climate change even if the number and duration of extreme heat waves increase. However, this does not mean that global warning would not harm crop production because of other impacts, e.g. shortening of the grain filling period. Based on the trends for the last 34 years in Germany, heat stress (stress thermal time) around anthesis would be 59% higher in year 2009 if the effect of high temperatures on accelerating wheat phenology were ignored. We conclude that climate impact assessments need to consider both the effect of high temperature on grain set at anthesis but also on crop phenology.
Impact event Phenology Video Winter Sound intensity Winter Global warming Stress (mechanics) Global warming
Audio frequency Stagecoach Musical development Grey Day Winter Global warming Global warming Spring (season) Axle Separation process Heat Phenology Heat Temperature Stress (mechanics)
Sensor Winter Magnetic core Refractive index Day Sound intensity Relative articulation Spring (season) Spring (season) Heat Phenology Alcohol proof Temperature Spare part Orbital period Temperature Absolute threshold of hearing Contrast (vision) Week
Effects unit Stress (mechanics) Winter Sound intensity Year Global warming Power (physics) Sound intensity Klemmverbindung Relative articulation Collar (clothing) Pattern (sewing) Rutschung Negation Stress (mechanics) Chronologie
Winter Thermal Global warming Global warming Command-line interface Climate Heat Phenology Adapter pattern Bahnelement Hour Orbital period Stress (mechanics) Angeregter Zustand
Universe
my name is Sinai she resigned from the Cook Science Group at University of Born Germany together with Michael Ortiz Siobhan Ziebarth and Frank Aaron I investigated the impact of global warming on he too stressed in winter wheat even shot episodes of a
high temperature can reduce the number of grays in this year's event according flowering and consequently declined crop yields It's them along
that the frequency and severity of heat events is increasing as a consequence of global warming however noble warming also axle rates crop development rates so that flowing time is no days earlier in the cooler spring season soul which of the 2 X is a strong
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we would like to 10 University of all and the German Research Foundation for farming of this study
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