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Water Demand in Maize Is Projected to Decrease under Changing Climate in India
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DOI：10.3390/su14031419.png)
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Abstract
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Crop stage-specific information on the impacts of projected climate change on crop and irrigation water requirements are essential for improving productivity. This study investigated the possible implications of projected climate change on the phenology, effective rainfall (P-eff), crop (CWR) and irrigation water requirements (IWR) of maize in eight locations in India. CWR, P-eff and IWR were estimated for seven crop stages viz., emergence, 5th leaf stage, tasseling, silking, milking, dough and maturity during the baseline (1980-2009) and near-century (2022-39) using climate data derived from a subset of 29 general circulation models. The results indicated that mean seasonal maximum temperature, minimum temperature and rainfall were projected to increase in all the locations. Hence, the total crop duration (3-7 days), CWR (8-69 mm) and IWR (1-54 mm) were projected to decrease. The study could identify the specific stages in which the greatest reduction in crop duration, CWR and IWR would occur. Such information will be of immense help to farmers and varietal improvement programs in the study regions in the near future.
Keywords:
GCMs
weighted average ensemble
phenology
effective rainfall
crop water requirement
irrigation water requirement
Journal
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3.3
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10.7W
Citations:
28.4W
Organization
Cited Papers
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