Coeficiente de redução da evapotranspiração em citros no cerrado

Abstract

There are coefficients that improve the water requirement of the plant in order to properly manage irrigation. In this context, this work aimed to verify the citrus water consumption estimated by different evapotranspiration reduction coefficient methodologies. The study was carried out in a commercial citrus (orange and tangerine) property in Itaberaí-GO, in 7x4 m spacing, with different ages. The evapotranspiration reduction coefficient (Kr) was estimated by seven different methodologies. The difference in water volume to be applied, estimated by different methodologies, varied up to 28% in fourteen year old orange plants, 30% in eleven year old orange plants, 31% in nine year old orange plants, 36% in nine-year-old tangerine plants, 47% in three-year orange plants and 92% in one-year orange plants. Depending on the reduction coefficient applied in irrigation management 14-year-old orange plants require between 96 and 124 L.day-1 of water, 11-year-old plants consume from 93 to 133 L.day-1, 9 years between 63 and 98 L.day-1 and 3 years 52 to 85 L.day-1.