Terroir 1996 banner
IVES 9 IVES Conference Series 9 Viticultural zoning in the province of San Juan, Argentina. Preliminary results, year 2000

Viticultural zoning in the province of San Juan, Argentina. Preliminary results, year 2000

Abstract

[English version below]

La région viticole de San Juan (Argentine) est marquée par des températures très élevées et des variations diurnes faibles. La valorisation de la connaissance de cet environnement et de ses interactions avec le fonctionnement de la vigne et le lien au vin passent par l’étude de ses terroirs et de leur caractérisation. Le point de départ de ce travail est l’étude des zones mésoclimatiques aptes à la culture de la vigne de la Province de San Juan et à la caractérisation des sols de cette même région. L’objectif est de définir le potentiel vitivinicole des zones considérées. Le croisement d’un type de climat et d’une série de sols est à l’origine de l’identification des Unités de Zonage. Le travail est réalisé à l’échelle d’une oasis sur un ensemble de 31 parcelles viticoles de cépages Syrah qui constitue un réseau de parcelles d’observation, situées dans les différentes vallées de Tulum, Ullum, Zonda et Pedernal. Des aspects concernant les relations entre les indices climatiques, le sol, les variables agronomiques de comportement de la plante et la qualité du raisin et des vins, sont étudiés pour la définition des zones et de leur typicité. A la suite d’une première année d’étude, 16 Unités de Zonages regroupées en 5 grandes zones homogènes ont pu être identifiées dans cette région viticole. Ce travail sera poursuivi pour préciser les résultats et caractériser ces zones.

The viticultural region of San Juan province (Argentina) is characterized by high temperatures during summer with small variations along the day. The knowledge about this environment and its interaction with vineyards and wine can be valorized by the study of its “terroirs” and their characteristics. This study is based on the study of soils and those mesoclimatic zones that are competent for vineyards. The aim is to define agricultural and enological potential of zones. The comparison among different climate and soil data bases leads to the identification of Zoning Units. These units have been elected within the region based on an observatory net of 31 Syrah vineyards. They were located in the valleys of Tulum, Zonda Ullum and Pedemal.
In order to define different Zoning Units and their typicity, relations between climatic indixes, soil characteristics, agronomic variables of the plant behaviours, and the quality of grapes and wines have been studied. Sixteen Zoning Units have yet been identified and gathered in five big homogeneous zores. Further studies are foreseen to precise the results and better characterize these zones.

DOI:

Publication date: February 15, 2022

Issue: Terroir 2002

Type: Article

Authors

M. GRASSIN, J. NAZRALA, H. VILA, C. TROILO

Station Expérimentale Agronomique (EEA) INTA Mendoza – Av. San Martin 3853 – 5507 Chacras de Coria

Keywords

zonage, vigne, terroir, climat, sol, typicité
zone, grapevine, Terroir, climate, soil, typicity

Tags

IVES Conference Series | Terroir 2002

Citation

Related articles…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.