ABSTRACT
This study aimed to analyse the agronomic performance of 1st and 2nd season of maize grown in the Central West part of Brazil in different climatic scenarios. Climatic data from five cities located in major maize producing regions of Mato Grosso, Mato Grosso do Sul and Goiás were used in Aquacrop 4.0 software to determine the duration of the cycle, yield, water use efficiency, net irrigation requirement and harvest index adjusted for different climatic scenarios, based on the percentile of 25 and 75% of the distribution of ‘ensemble’ between the models used to generate the scenario RCP 4.5 in the near term (2016-2035) and medium term (2046-2065) of the Intergovernmental Panel on Climate Change. In a general context, the first season of maize will have reduction in duration of the cycle and will not suffer from water stress in the Central West of Brazil. The yield and net irrigation requirement of maize in second season should decrease, the greater the reduction in the duration of the crop cycle.
Key words:
Aquacrop; yield; irrigation; harvest index; phenology
