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O objetivo do presente trabalho foi determinar a demanda hídrica e os coeficientes de cultura (Kc) para macieiras cultivadas na região de Vacaria, RS. O trabalho foi desenvolvido na Estação Experimental de Fruticultura Temperada (EEFT) da Embrapa Uva e Vinho, localizada em Vacaria, RS, em plantas da cultivar 'Royal Gala' (Malus domestica) sobre porta-enxerto M9. Foram determinados os valores do potencial matricial da água no solo, empregando-se tensiômetros de punção. Com base nesses valores, determinou-se a umidade volumétrica e o balanço hídrico mensal. O consumo hídrico da cultura variou entre 0,3mm dia-1 a 4,5mm dia-1, com média de 1,9mm dia-1. O coeficiente da cultura (Kc) apresentou tendência quadrática, variando entre 0,19 e 0,88, com média igual a 0,58. The objective of this study was to determine the water requirement and the crop coefficients (Kc) values for apple trees cultivated in Vacaria, RS. The study was conducted at the Experimental Station of Temperate Fruits (EEFT) of Embrapa Grape and Wine, located in Vacaria, RS, in plants of the cultivar 'Royal Gala' (Malus domestica) on the rootstock M9. The soil water matric potential values, that were determined employing tensiometers, were used to obtain the soil moisture and the monthly soil water balance. The water consumption of the culture ranged from 0.3mm day-1 to 4.5mm day-1, with an average of 1.9mm day-1. The crop coefficient (Kc) presented a quadratic trend, ranging between 0.19 and 0.88, with mean value of 0.58

Demanda hídrica e coeficientes de cultura (Kc) para macieiras em Vacaria, RS