Impact of Change in Temperature on Yield and Water Requirement of Winter Maize using FAO-AquaCrop Model for North Bihar
Unknown authors
Abstract
The simulation analysis was made for three seasons 2016-17,2017-18 and 2018-19 and for five levels of maximum and winter minimum temperature increase and compared with the performance of maize crop with actual temperature level using the FAOwinter Aquacrop model.The five levels of maximum and minimum temperature increases were T +1 C, T +2 C, T +3 C,T +4 C, T +5 C and max max max max max 0 0 0 0 0 T +1 C, T +2 C, T +3 C,T +4 C, T +5 C respectively.For , model prediction for the future temperature increases in min.min min min min 0 0 0 0 0 winter maize maximum temperature for five levels T +1 C, T +2 C, T +3 C,T +4 C, T +5 C showed a positive response on simulated crop yield max max max max max 0 0 0 0 0 and biomass.The increase in yield and biomass of maize varied from 5.6 to 23.7 % for 2016-17, 4.3 to 19.6 % for 2017-18 and 6.4 to winter 27.3 % for 2018-19 for five levels of temperature increase T +1 C, T +2 C, T +3 C,T +4 C, T +5 C respectively.The average increase in max max max max max 0 0 0 0 0 simulated yield and biomass of maize 3.73 % for 2016-17, 3.06 % for 2017-18 and 4.19 % for 2018-19 for one degree winterwas found to be (1 C) rise in maximum temperature.Model prediction for the future temperature increase in minimum temperature for five levels also showed a 0 positive response on simulated crop yield and biomass.But the predicted yield and biomass increase are more pronounced in case of increase due to maximum temperature elevation.The average increase in simulated yield and biomass of maize was found 4.07 % for 2016-17, winter 3.37 % for 2017-18 and 4.47 % for 2018-19 for one degree (1 C) increase in minimum temperature.Crop water requirement increased with 0 increasing level of maximum temperature for all three years.With the increase in temperature simulated yield also increased for winter maize alongside crop water requirement.