Abstract

BLANCO, Giomar et al. Chemical characterization of leachates pseudostems and leaf blades of 'Harton' plantain in Yaracuy state. Agronomía Trop. [online]. 2013, vol.63, n.3-4, pp.121-134. ISSN 0002-192X.

Leachate obtaining effective against diseases of interest, like its potential as growth stimulators in Musa, it emerges as an alternative to the use of crop residues bananas (Musa AAB). To chemically characterize the pseudostems and leaf blades leachate of 'Harton' plantain biomass from two locations with different management were placed in plastic containers for decomposition, under a completely randomized design and factorial arrangement 2x2 (type of leachate and locality) with three replications. Protein concentration, macro and microminerals, humic and fulvic acids, absorption spectra of each leachate, in comparison with the absorption spectra of growth regulators and the presence of secondary metabolites were determined. It was found that, regardless of the locality, the analyzed compounds were present in leachates. The highest concentration of protein was obtained in leaf blades, reaching values of 128 μg ml^-1. Potassium was the most abundant element in both extracts, representing 77% of the composition of macroelements. Only in leaf blades leachates humic and fulvic acids were detected, at concentrations of 0.06 and 0.35%, respectively. The maxima absorptions obtained for leachates were between 220 and 250 nm, coinciding with auxin and cytokinin absortions. The higher intensity secondary metabolites observed were flavonoids, alkaloids, carboxylic acids, phenols and anthraquinones. The presence of protein, nutrients, secondary metabolites and growth regulators in the plantain leachates had properties for disease control and promoting growth in plants.

Keywords : Musa AAB; secondary metabolites; nutrients; proteins; growth regulators.

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