Modelling the impact of climate change on maize yield under rainfed conditions in sub-humid Ghana
Fosu-Mensah, Benedicta (2013). Modelling the impact of climate change on maize yield under rainfed conditions in sub-humid Ghana. UNU-INRA Working Paper. UNU-INRA.
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Sub-type Research report Author Fosu-Mensah, Benedicta Title Modelling the impact of climate change on maize yield under rainfed conditions in sub-humid Ghana Series Title UNU-INRA Working Paper Volume/Issue No. 1 Publication Date 2013-03-01 Place of Publication Ghana Publisher UNU-INRA Pages 38 Language eng Abstract Climate change and variability pose a serious threat to food production in Sub-Saharan Africa (SSA). The projected changes in spatio-temporal patterns of rainfall and temperature are likely to affect water and nutrients availability, crop growth, and yield. This paper presents the simulated effects of climate change on maize (Zea mays L.) yield under rainfed conditions in Ejura, Ghana, known as one of the major food baskets of the country. Experimental data from maize grown under various nitrogen (N) and phosphorus (P) regimes in the 2008 major and minor seasons at two sites in Ejura were used to set parameters for and evaluate the cropping systems model APSIM. Daily climatic data for the period 2030-2050 under the scenarios A1B* and B1** (2030-2050) were obtained from the regional mesoscale model MM5. Assessment of the impact of climate change on the onset of the rainy season (ORS) suggested a likely six-week shift in the onset of the rainy season from week 3 of March (1980-2000) to week 2 of May for simulated data. This six-week delay in sowing resulted in a significant yield reduction and a significant increase in yield variability under both scenarios. Potential adaptation measures include early planting, introduction of fallow rotation and supplemental irrigation. UNBIS Thesaurus NITROGEN
MAIZE
PHOSPHORUSKeyword Simulation
Modelling
Nitrogen
Phosphorus
Sowing date
Maize
Climate changeCopyright Holder United Nations University Copyright Year 2013 Copyright type All rights reserved ISBN 9789988633721 -
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