The work had as objective to define the most adequate irrigation system to banana crop in the third cycle under Bahia Coast Tableland conditions. The experiment followed a random block design with four replications and 10 treatments, in a 5 x 2 factorial scheme with five levels of water depths and two banana cultivars: "Prata Anã" (Prata Group) and "Grande Naine" (Cavendish Group). The treatments or irrigation systems were defined from five fractions of the crop evapotranspiration, defined by the product of potential evapotranspiration and the recommended crop coefficients. The Grande Naine cultivar was harvested 45 days earlier than the Prata Ana, under irrigation. The irrigation depth of 415 mm was considered the most adequate to be applied to the Grande Naine cv., while the water depth of 554 mm was the most adequate for the 'Prata Anã'. The crop coefficients had limits from 0.44 to 0.89 and 0.58 to 1.18 for Grande Naine and Prata Anã cultivars respectively.
evapotranspiration; crop coefficient; irrigation management
