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%).
Lingua originale | English |
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Titolo della pubblicazione ospite | Actes IXe Congrès International des Terroirs vitivinicoles 2012 |
Pagine | 7-10 |
Numero di pagine | 4 |
Stato di pubblicazione | Pubblicato - 2012 |
Evento | IXe Congrès International des Terroirs vitivinicoles 2012 - Dijon - Reims Durata: 25 giu 2012 → 29 giu 2012 |
Convegno
Convegno | IXe Congrès International des Terroirs vitivinicoles 2012 |
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Città | Dijon - Reims |
Periodo | 25/6/12 → 29/6/12 |
Keywords
- epicuticular wax
- grapevine
- postharvest weight loss
- skin thickness