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Anais da Academia Brasileira de Ciências
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MOREIRA, Adônis; CASTRO, César de and FAGERIA, Nand K.. Efficiency of boron application in an Oxisol cultivated with banana in the Central Amazon. An. Acad. Bras. Ciênc. [online]. 2010, vol.82, n.4, pp. 1137-1145. ISSN 0001-3765. http://dx.doi.org/10.1590/S0001-37652010000400030.
In the Amazon region, there is no information on the fertilization of banana plants with boron (B). Besides this, the extractant (hot water) currently used to test B concentrations has many limitations. The aim of this work was to study the effect of B on the fruit yield and quality of banana plants of the Cavendish (AAA) sub-group, grown in dystrophic Yellow Latosol (Oxisol or Xanthic Ferralsol), in the Amazonas State, Brazil. The experimental design was completely randomized split plot in a 4 x 2 factorial scheme, composed of four B rates (0, 4, 8 and 12 kg ha-1) and two harvest cycles (sub-treatments), with four replicates. The B availability in the soil was determined by three extractants: Mehlich 3, hot water and KCl 1.0 mol L-1. The application of B influences the fruit yield, pulp/peel ratio, pulp resistance and B content in the leaves and fruits. The KCl 1.0 mol L-1 extractant was similar to the hot water in the evaluation of available B. To obtain maximum yield, it is necessary to apply 4.1 and 6.1 kg ha-1 of B in the first and second cycles, respectively.
Keywords : Musa spp.; yield; methods of soil analysis; post-harvest.