Response of crop yield to predicted changes in climate and atmospheric CO2 using simulation

Curry, R.B.; Peart, R.M.; Jones, J.W.; Boote, K.J.; Allen, L.H. Jr

Response of crop yield to predicted changes in climate and atmospheric CO2 using simulation

1990

Curry, R.B. | Peart, R.M. | Jones, J.W. | Boote, K.J. | Allen, L.H. Jr

Soybean growth and yield for 19 locations in southeastern U.S.A. were simulated for 30 years (1951-80) of climate data. Three different climate change scenarios, with and without supplemental irrigation, were used with the SOYGRO crop model. The three climate scenarios were standard historic data and two scenarios based on changes predicted by two general circulation models (GCM) for a doubling of atmospheric carbon dioxide. Results were analyzed for four different conditions; normal weather, doubled CO2 alone, climate change alone, and the combined effect of climate change and doubled CO2. Results indicate 1) yields vary widely with climate scenario; 2) increased water use and irrigation need for the combined case of doubled CO2 and climate change; and 3) simulation is a useful tool for this type of study.

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