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

Luigi Bavaresco, F Battista, L Lovat, D Porro, E Tosi, D. Tomasi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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%).
Original languageEnglish
Title of host publicationActes IXe Congrès International des Terroirs vitivinicoles 2012
Pages7-10
Number of pages4
Publication statusPublished - 2012
EventIXe Congrès International des Terroirs vitivinicoles 2012 - Dijon - Reims
Duration: 25 Jun 201229 Jun 2012

Conference

ConferenceIXe Congrès International des Terroirs vitivinicoles 2012
CityDijon - Reims
Period25/6/1229/6/12

Keywords

  • epicuticular wax
  • grapevine
  • postharvest weight loss
  • skin thickness

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