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Which agriculture can face climate change? Focus on varietal adaptation

Authors
Publication Date
Keywords
  • Life Sciences :: Agriculture & Agronomy [F01]
  • Sciences Du Vivant :: Agriculture & Agronomie [F01]
  • Life Sciences :: Environmental Sciences & Ecology [F08]
  • Sciences Du Vivant :: Sciences De L'Environnement & écologie [F08]
Disciplines
  • Agricultural Science

Abstract

AMICE final event_1.pub A. Bauwens, C. Sohier, A.Degré Which agriculture can face climate change? Focus on varietal adaptation Study context Heat wave, drought, more rain and higher temperature are just few hazards agriculture may face on at the end of the century. Negative effects as well as opportunities may be encountered . But in all case, ADAPTATION will be necessary. Study area Adaptation of maize is considered in Wallonia, Belgium for the end of the century under 2 climate change scenarios wet/ dry (CCI-HYDR). Maize is present in all regions of the Meuse catchment. Key factors for crop growth  Accumulation of heat  Length of the day  Availability of the water  Nutrients  Atmospheric CO2  Variety of the crop  Management practices Stresses / positive effects of CC  Faster start of the crop  Heat and drought stress in summer  Shortened growing season  Increased yield variability  CO2 fertilization Optimization of the crop  Adaptation of seeding and harvesting dates  Development of varieties more resistant to drought and/or heat  Varieties with longer growing season Effects of climate change on actual maize and consequences of adaptation Adaptation of optimal temperature for growth: Final Event 13‐15 March 2013 Sedan, France Soil‐Water Systems Passage des Déportés, 2 2030 Gembloux, Belgium 2070-2100 High 2070-2100 Low 12.60 12.70 12.80 12.90 13.00 13.10 13.20 15 16 17 18 19 20 21 22 23 yi el ds (t /h a) optimal temperature (°C) Evolution of maize yields in 2070‐2100 high in function of optimal temperature 13.20 13.40 13.60 13.80 14.00 14.20 14.40 14.60 14.80 15 16 17 18 19 20 21 22 23 yi el ds (t /h a) optimal temperature (°C) Evolution of maize yields in 2070‐2100 low in function of optimal temperature 0 0.2 0.4 0.6 0.8 1 01 ‐Ja n 01 ‐Fe b 01 ‐M ar 01 ‐Ap r 01 ‐M ay 01 ‐Ju n 01

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