Análise agrometeorológica em regiões de Alagoas para a cultura do mamão (Carica papaya L.)

Abstract

The objective this study is to determine the agrometeorological potential of the microregions of Água Branca, Pão de Açúcar, Palmeira dos Índios, Rio Largo and Porto de Pedras in Alagoas state, Brazil for papaya crops (Carica papaya). Daily sunshine duration, maximum and minimum air temperature, relative humidity, wind speed and rainfall, data from the National Institute of Meteorology (INMET) and the Agrometeorological Station of Campus Delza Gitaí/UFAL Campus (09° 28' 02" S; 35° 49' 43" W; 107m) in Rio Largo. In discribing the climatology of these regions, the radiation budget was determined as well as thedistribuitions of the meteorological variables and reference evapotranspiration to 25, 50 and 75% of probability (percentile technique). The energy budget, reference evapotranspiration and the crop coefficient were calculated for a papaya orchad in Pilar (09°36' S; 35°53' W; 107m). It was observad that the rainfall is only meteorological parameter that does not satisfy the optimal development criteria for papaya growth. The averege daily annual reference evapotranspiration, changed from 3.98 mmday-1 (Rio largo) to 4.50 mmday-1 (Pão de açúcar). The average were evapotranspiration of papaya crop in Pilar were 5.30 mm and the maximum 8.61 mm (Penman-Monteith method) while the values using the bowen ratio technique were 5.50 mm and 7.10, respectively. The crop coefficient for papaya using the reference evapotrasnpiration methods during the blooming and fruition periods change from 0.81 to 1.32.