Authors: Proloy Deb Duong Anh Tran Parmeshwar D Udmale
Publish Date: 2015/06/21
Volume: 125, Issue: 3-4, Pages: 641-656
Abstract
This study investigates the temporal impacts of climate change on rice yield for summerautumn SA and autumnwinter AW cropping pattern along with implication of brackish irrigation water for the SA season Furthermore evaluation of different agroadaptations to overcome negative impacts of climate change was also done for Ca Mau province of Vietnam Climatic variables were derived from six general circulation models which were further bias corrected at Ca Mau city station for three future time periods 2025s 2055s and 2085s Calibrated AquaCrop 40 was used to project the future rice yield under climate change and different salinity levels in irrigation water Simulation shows a decline in rice yield ranging from 160 to 2369 and 806 to 2015 by 2085s relative to baseline climate for A2 and B2 scenarios respectively in the case of the SA cropping season However an increase in rice yield ranging from 329 to 1235 and 664 to 1723 is observed for the corresponding time period and scenarios Further simulations for the SA cropping season under climate change and increasing salinity in irrigation water suggest an insignificant increase in yield relative to the yield obtained without irrigation Moreover proper management practices namely forward and early shifts in transplanting dates along with increasing fertilizer application rates are observed to be beneficial to enhance the rice yield under climate changeThe financial support provided by the APEC climate center Busan South Korea and the Swedish International Development Agency SIDA provided to the second author is acknowledged In addition wholehearted thanks are also given to the Department of Agriculture and Rural Development of Ca Mau city Southern Regional Hydrometeorological Center and Can Tho University Vietnam for providing all necessary data
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