Resumo

ROMAN BRITEZ, Pedro Antonio; RASCHE ALVAREZ, Jimmy Walter  e  FATECHA FOIS, Diego Augusto. Nitrogen and potassium fertilization in banana crop (Musa paradisiaca L.) in the District of Guajayvi, Department of San Pedro. Rev. ciente. UCSA [online]. 2023, vol.10, n.2, pp.3-13. ISSN 2409-8752.  https://doi.org/10.18004/ucsa/2409-8752/2023.010.02.003.

Chemical fertilization can considerably increase banana production, however, it is important to determine the correct doses for a better use of nutrients. In order to evaluate the effect of nitrogenous and potassium fertilization on growth and yield variables of the banana crop and the potassium content in the soil, an experiment was installed in the district of Guajayvi, Department of San Pedro. A randomized complete block bifactorial experimental design was obtained, where Factor 1 corresponded to N doses (0, 60, 120 kg ha-1) and Factor 2 to K2O doses (0, 100, 200 kg ha-1), totaling 9 treatments with 4 repetitions. The evaluated variables were pseudostem circumference (cm), bunch weight (kg), number of hands per bunch (ud), length of the middle finger of the second hand (cm), plant height (cm) and potassium content in the soil (cmolc kg-1), which were subjected to a normality test by the Kormogorov method, and considering that the distribution of the data was normal, they were subjected to the analysis of variance (ANOVA) and the Tukey test at 5 % when there were significant differences. Significant statistical differences were observed in all the agronomic variables, but not in the potassium content in the soil. The interaction between the factors of pseudostem circumference and plant height was broken, for which the highest dose of N and K2O allowed the largest diameters and plant height. Bunch weight increased 22.4 % with the application of 120 kg ha-1 of N and 15.0 % with 200 kg ha-1 of K2O, compared to the control. The number of stalks per bunch also increased with the application of the highest doses of N and K2O individually, and the length of the central finger increased 11% with the application of K2O, being not influenced by the application of N. There was no effect of the application of K2O on its concentration in the soil. Both the application of N and K2O in their highest doses increase the growth and production of bananas.

Palavras-chave : nitrogen; potassium; K: N ratio; banana productivity.

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