Resumen

RIVANEIRA, M. F. Concentración de nutrientes en hojas de diferente estado de desarrollo en arándano. RIA. Rev. investig. agropecu. [online]. 2012, vol.38, n.3, pp.247-250. ISSN 1669-2314.

It is very important to define the appropriate tissue and sample time for nutritional diagnosis in order to prevent possible mistakes in taking decisions. There is little information about the mineral composition and nutrition of blueberries varieties in the producing areas in Argentina. The aim of this study was to determine the concentration of nutrients in blueberry leaves of commercial cultivars (Vaccinium corymbosum L. cvs Misty, Jewel and Emerald) in two different stages. Sampling was performed in commercials orchards located in Concordia, Entre Ríos Argentina in 2008. Fully expanded leaves without damage or injuries were collected from 70 to 90 days after full bloom (Full Bloom: 15/08/2008) in two leaf stages (leaf located in the previous season spring flush canes with fruit and leaf located in the current spring flush canes, without fruit). Leaf nutrient concentration (g/100 g DM) of N, P, K, Ca and Mg were determined. The data were analyzed with ANOVA, with cultivar and leaf age as fixed factors and leaf nutrient concentration as the dependent variable. The concentration of Mg depended on the variety with Misty having the highest concentration of 0.30% Mg, Emerald 0.24% and Jewel presented the lowest concentration of 0.16% Mg (p = 0.008). Older leaves had higher Mg concentrations (p = 0.009). It is necessary to consider these differences in sampling procedures and in making nutritional diagnosis.

Palabras clave : Southern highbush; Blueberry; Vaccinium corymbosum.

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