RESUMOAvaliou-se, com o presente trabalho, a influência de diferentes lâminas de irrigação sob o crescimento da cultura da bananeira Grande Naine. O experimento foi conduzido no campo experimental do Centro Nacional de Pesquisa Mandioca e Fruticultura. Utilizou-se delineamento experimental blocos casualizados com seis lâminas de irrigação e oito repetições. A lâmina de irrigação L1 correspondeu à chuva. A lâmina L6 foi determinada com o uso do Kc e ETo. As demais lâminas foram determinadas pela fórmula NH = K x AF x ETo, em que NH é a necessidade hídrica da cultura (L planta -1 ), K (coeficiente empírico de transpiração da planta) e AF -área foliar (m 2 planta -1 ) e ETo -evapotranspiração de referência (mm). Foram avaliados: altura da planta; circunferência do pseudocaule; área foliar; número de folhas vivas e duração do ciclo da cultura. O melhor crescimento da cultura foi obtido com o coeficiente de transpiração de 0,57 e uma lâmina de irrigação estimada em 1247 mm. Palavras-chave: Musa spp., manejo de água, transpiraçãoGrowth of banana Grande Naine under different irrigation levels in Coastal Plain ABSTRACT This study evaluated the influence of different irrigation levels on the growth of the banana crop cv. Grande Naine. The experiment was conducted in the experimental field of the Centro Nacional de Pesquisa Mandioca e Fruticultura. A randomized block design was used with six levels of irrigation and eight replications. The irrigation L1 corresponded to rain. The irrigation L6 was determined using the Kc and ETo. The other irrigation levels were determined by the formula NH = K x AF x ETo, where NH is the water requirement of the crop (L plant -1 ), K (empirical coefficient of plant transpiration), AF -leaf area (m 2 plant -1 ) and ETo -reference evapotranspiration (mm). The parameters evaluated were: plant height, pseudostem circumference, leaf area, alive leaf number and duration of the crop cycle. The growth of cv. Grande Naine was influenced by irrigation, it is possible to estimate the water requirement of the banana crop, based on knowledge of leaf area and ETo. The best crop growth was obtained with a transpiration coefficient of 0.57 and irrigation depth estimated in 1247 mm.
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