Hydroxycinnamic acids as affected by different fertilization of Rebula grapevines |
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Authors: | Kristina Brataševec Branka Mozetič Vodopivec Marko Petek Paolo Sivilotti |
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Affiliation: | 1. Regional development agency of Northern Primorska Ltd Nova Gorica, Trg Edvarda Kardelja 3, 5000 Nova Gorica, Slovenia;2. University of Nova Gorica, Wine Research Centre, Glavni trg 8, 5271 Vipava, Slovenia;3. University of Zagreb, Faculty of Agriculture, Department of Plant Nutrition, Svetosimunska cesta 25, 10000 Zagreb, Croatia;4. Individual business, via D. Alighieri 12, 34072 Farra d'Isonzo, Italy |
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Abstract: | The phenolic composition of white grapes is important since browning reactions may dramatically compromise the overall quality of musts and wines. Only few scientific contributions are available, which investigated how fertilization can influence this class of compounds. Thus, the aim of this work was to examine the effects of NPK soil fertilization coupled with soil or foliar applications of Mg, Fe, and Zn on the concentrations of K, Mg, Fe, and Zn of grape berries and leaf petioles of potted Rebula grapevines (Vitis vinifera L.), also revealing the change of hydroxycinnamic acids in grape juice. The results obtained over the three‐year study (2009–2011) showed that NPK fertilization positively affected K and Zn concentrations of petioles and grape berries, and negatively Mg. In addition, K (synergistic) and Mg (antagonistic) had an influence on Zn uptake. Our findings suggest that the supply of NPK was profitable for a reduction of trans‐caftaric acid in grape juice, while only few differences were observed with further application of nutrients. |
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Keywords: | calcareous soil foliar fertilization phenols Vitis vinifera |
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