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IVES 9 IVES Conference Series 9 Evaluation of Valdadige DOC “Terra dei Forti” vineyards by zoning approach

Evaluation of Valdadige DOC “Terra dei Forti” vineyards by zoning approach

Abstract

[English version below]

La conoscenza dell’interazione genotipo x ambiente e pertanto della caratterizzazione territoriale è di prioritaria importanza nella valutazione dei siti. Grazie alla combinazione di dati GIS spazializzati con quelli viticoli (zonazione) si può aggiornare il concetto di “terroir” ottimizzando la produzione di vini caratterizzati da alta tipicità.
Al fine di aumentare la conoscenza dell’area viticola compresa nella DOC Valdadige “Terra dei Forti” (circa 1250 ettari vitati dislocati nelle regioni Veneto e Trentino Alto Adige del Nord-est dell’Italia) e trarne utili informazioni per ottimizzare le produzioni di vino in relazione all’ambiente, nel periodo 2005-2007 si è intrapreso un lavoro di zonazione. L’approccio dello studio si è basato su una classica indagine pedologica che ha classificato i suoli in funzione dell’origine dei materiali parentali dei terreni, arrivando in seguito a definire Unità di Paesaggio (UdP). Le diverse tipologie di suolo sono poi state utilizzate per realizzare una cartografia basata sui diversi parametri pedologici e individuare aree omogenee. Nelle differenti aree derivate sono stati monitorati più di 30 vigneti coltivati con Chardonnay, Pinot grigio ed Enantio. Nel corso del triennio d’indagine, annualmente venivano raccolti dati meteorologici, quantitativi e qualitativi. I risultati dello studio di zonazione hanno evidenziato che alcuni parametri qualitativi così come alcuni composti aromatici dei vini venivano fortemente modificati in relazione alle UdP, alla disponibilità idrica (AWC), alla profondità e permeabilità dei suoli, alla quota altimetrica, all’inclinazione dei versanti, all’indice di Winkler e alle precipitazioni. La sintesi delle informazioni ottenute ha permesso di creare unità vocazionali (UV), distinte per le diverse varietà, in grado di valorizzare i diversi areali produttivi definendo ove produrre la miglior qualità e tipicità. Le diverse UV sono state formate aggregando rispettivamente: UdP, inclinazione, AWC, permeabilità e Winkler per l’Enantio; altitudine e profondità dei suoli per lo Chardonnay; AWC, altitudine, precipitazioni e Winkler per Pinot grigio.

 

A viticultural terroir is seldom defined as a region which is related to a particular area with a distinct quality of grapes and their wines. Also typicality refers to geographically referenced products. So, in site evaluation becomes very important the knowledge of interaction genotype x environment. The combination of spatial modeling, of geographical information system (GIS) data, and of viticultural data can update the concept of terroir, optimizing the production of wines characterized by organoleptic typicality. For these reasons the zoning approach becomes an important commercial vector for the wine productive sector linked to a specific viticultural production area.
In the 2005-2007 period a job of zoning was undertaken in order to improve the knowledge of Valdadige DOC “Terra dei Forti” (1250 hectares) viticultural area and to give better information able to optimize wine production and to make good use of the environment. The area is located in Veneto and Trentino Alto Adige regions in North-Eastern Italy. The approach of the study was based on a classic pedological survey using landscape genesis that defined different landscape units (UdP). The different soil types were then used to create maps based on different soil parameters and to identify homogeneous areas. In the derived areas more than 30 vineyards cultivated with Chardonnay, Pinot gris, and Enantio varieties were tested. Meteorological data, quantitative (yield), and qualitative data (musts and wines) were yearly collected for three years.
Results of the zoning study showed a strong effect of both qualitative and aromatic parameters due to UdP, soil water availability (AWC), soil depth and permeability, site-altitude, inclination of the slopes, Winkler index and rainfall. The synthesis of obtained information allowed to create different vocational units (UV) for the three cultivars, able to valorize the peculiar characteristics of the production areas in a different way obtaining the best quality products. The different UV were formed by aggregating respectively: UdP, inclination of the slopes, AWC, soil permeability and Winkler for Enantio; site-altitude and soil-depth for Chardonnay; AWC, site-altitude, rainfall and Winkler for Pinot gris.
Data reported confirmed that zoning study allows to combine in a multidimensional analysis all the factors involving variability and to consider the system terroir-vine-wine as a whole, with effective results. The correct interpretation of the effects due to soil origin and to the changes in soil water availability affecting the expression of terroir characters, particularly fruit composition and aromatic compounds, can give information useful building up maps of soil use (UV
).

DOI:

Publication date: December 3, 2021

Issue: Terroir 2010

Type: Article

Authors

D. Porro (1), J. Cricco (2), F. Gasperi (3), R. Larcher (1), L. Toninato (2), R. Zorer (3), A. Scienza (4)

(1) Fondazione Edmund Mach, Centro di Trasferimento Tecnologico, via Mach 1, 38010 – S.Michele a/A (TN)), Italia
(2) AGER s.c., via Tucidide 56, 20134 – Milano, Italia
(3) Fondazione Edmund Mach, Centro Ricerca e Innovazione, via E. Mach 1, 38010 – S. Michele a/A (TN), Italia
(4) Facoltà di Agraria, Dipartimento di Produzione Vegetale, Università di Milano, via Celoria 2, 20133 Milano, Italia

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Keywords

Parametri pedologici, clima, composti aromatici, unità vocazionali, qualità del vino
Soil parameters, climate, aromatic compounds, vocational units, wine quality

Tags

IVES Conference Series | Terroir 2010

Citation

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