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Pesquisa Agropecuária Brasileira

Print version ISSN 0100-204XOn-line version ISSN 1678-3921


SOUSA, Valdemício Ferreira de et al. Nitrogen and potassium applied by fertirrigation on the yield characteristics of banana 'Grand Naine'. Pesq. agropec. bras. [online]. 2004, vol.39, n.9, pp.865-869. ISSN 0100-204X.

The objective of this work was to evaluate the effect of nitrogen and potassium, applied through irrigation water by microsprinkler, on the production characteristics of banana, cv. Grand Naine. The experimental design was a randomized block with four replications. The treatments consisted of 30, 180, 300, 420 and 570 kg ha-1 year-1 of N and of 55, 330, 550, 770 and 1,045 kg ha-1 year-1 of K2O and a control treatment (no fertilizers), totalizing 11 treatments, according to the Plan Puebla III experimental matrix model. The following characteristics were evaluated: average fruit mass, average bunch mass, and fruit yield, referent to the first and the second production cycles. In the first and second production cycle, average fruit mass, average bunch mass and fruit yield were influenced only by the potassium. Higher values of average fruit mass (253.47 g), average bunch mass (28 kg) and fruit yield (55.42 t ha-1), for the first production cycle, were obtained with the application of 938.46, 665.38 and 635.00 kg ha-1 of K2O, respectively. In the second cycle, higher values in relation average fruit mass (174.22 g), average bunch mass (32.04 kg) and yield (60.89 t ha-1) were gathered with the application of 725.50, 907.50 and 933.33 kg ha-1 of K2O, respectively. There was no response of evaluated characteristics to nitrogen.

Keywords : Musa spp.; fertirrigation; plant nutrition; micro-sprinkler irrigation.

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