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IVES 9 IVES Conference Series 9 Corvina and Corvinone grape berries grown in different areas and their aptitude to postharvest dehydration

Corvina and Corvinone grape berries grown in different areas and their aptitude to postharvest dehydration

Abstract

The Valpolicella area (Veneto Region, Italy) is famous for its high quality wines: Amarone and Recioto, both obtained from partial post-harvest dehydrated red grapes. The main cultivars used for these wines are Corvina and Corvinone. In this region hundreds of years ago a particular wine making process was developed to dehydrate the grape after the harvest.

The aim of this innovative work was to study how the environmental factors affected the post-harvest dehydration process.
Different vocation units were defined from a pedological survey using landscape genesis. Afterwards Corvina and Corvinone vineyards, trained with simple Guyot, were selected and observed for a three year period (2009-2011). New parameters correlated to grape dehydration rate were evaluated: quantity of epicutiuolar wax (Ew), skin thickness (ThS), bunch density (BD) and berry surface to volume ratio (S/V).

The results showed a variation of these parameters depending on the environmental variability, mainly due to pedological soil characteristics (texture, depth, soil water availability), site-altitude and exposure. The Ew, BD and S/V showed a good correlation with the kinetic of post-harvest weight loss, so the evaluation of these parameters can be used as a prediction model. This new information is useful for winemakers so they can separate the grapes depending on the growing area to reach an optimum post-harvest weight loss (from 35 % to 45 %).

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DOI:

Publication date: October 1, 2020

Issue: Terroir 2012

Type: Article

Authors

Fabrizio BATTISTA (1) , Lorenzo LOVAT (1), Duilio PORRO (2), Emanuele TOSI (3), Luigi BAVARESCO (1), Diego TOMASI (1)

(1) Centro di Ricerca per la Viticoltura, Consiglio per la Ricerca e la Sperimentazione in Agricoltura, Viale 28 Aprile 26, Conegliano (TV), Italy
(2) Fondazione Edmund Mach, Centro di Trasferimento Tecnologico, via Mach 1, S.Michele a/A (TN), Italy
(3) Centro per la sperimentazione in Vitivinicultura, Provincia di Verona, Via della Pieve 64, S. Pietro in Cariano (VR), Italy

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Keywords

grapevine, epicuticular wax, skin thickness, postharvest weight loss

Tags

IVES Conference Series | Terroir 2012

Citation

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