Terroir 1996 banner
IVES 9 IVES Conference Series 9 Preliminary studies of zoning applications in Goriška Brda (Collio) winegrowing region, Slovenia

Preliminary studies of zoning applications in Goriška Brda (Collio) winegrowing region, Slovenia

Abstract

[English version below]

Goriška Brda est la région viticole située le plus à l’ouest de la Slovénie, attenante au Collio d’Italie. Goriška Brda (2020 ha de vignobles) a une longue tradition d’élevage viticole. La proximité de la mer Adriatique (Golfe de Trieste) au sud-ouest et des Alpes Juliennes au nord contribue à un climat caractéristique et unique qui influe sur la croissance et la fertilité de la vigne. La constitution des sols, un climat typique et un relief mouvementé provoquent des différences dans la production du raisin, sa quantité et sa qualité. L’utilisation du zonage ou du microzonage permettraient d’atténuer les influences des facteurs climatiques et du sol sur la production de la vigne ou d’en profiter. Pour évaluer la signification des différents facteurs, nous avons résumé et réuni les modèles de différents auteurs. Nous avons déterminé la somme des températures effectives d’après WINKLER l’index héliothermique selon BRANAS et HUGLIN, le coefficient thermique d’après Kerner, le coefficient hydrothermique selon SELJANOV et l’index bioclimatique avec l’aide des données hydrométéorologiques de la moyenne de trente ans et de la moyenne de sept stations météorologiques pour 2000 et 2001. Pour une évaluation plus exacte des influences, nous avons utilisé des cartes pédologiques, de relief et des cartes digitales cadastrales. Avec les photographies aériennes digitales et le registre des producteurs de raisin et de vin, nous y avons déterminé la superficie totale des vignobles, la manière de production et la diffusion des différentes espèces. À cause de sa diffusion et de sa production exigeante, nous avons incorporé dans le modèle le cépage rouge cv. ‘Merlot’. À l’intérieur de la région, les différences de températures moyennes mensuelles, les précipitations moyennes et l’humidité moyenne de l’air dans la croissance de la vigne ont été démontrées à l’aide des mesures faites par les stations hydrométéorologiques. Les résultats des coefficients et des index ont montré des différences partiellement significatives statistiquement entre les stations (Statgraphics 4.0). Les différences statistiquement significatives sont apparues dans la quantité et la qualité du produit dans les vignobles en expérimentation.

Goriška brda is the most west winegrowing region in Slovenia; geographically it is the extension of the Italian winegrowing area known as Collio. The region comprehends 2020 ha of vineyards and is known as a traditional viticulture land since ever. The Adriatic Sea from Southwest and Julian Alps from North booth form the unique climate that has an important role upon the grapevine performance. The uneven soil types, the unique climate and the folded slopes cause the differential grapevine reaction giving a variety of quantity and quality of grapes. Defining the region into small regional units-‘microregionalisation’ could be the way to minimize the bad and turn to our account the good factors of the soil-climate combination. Different models were taken to evaluate the influential factors. We calculated the Winkler’s heat summation above 10°C threshold, heliotermical indexes (BRANAS, HUGLIN), termical coefficient (KERNER), hidrotermical coefficient (SELJANINOV) and bioclimatic index using the two years (2000 and 2001) meteorological data of seven weather stations in the region as well as the average data of the 30 years period (1961-1990). The digital pedological, geological, relief and cadastre maps were used to locate the vineyards and the examined factors. The complete vineyard sites were supervised with the data from vineyard practice to the varieties structure and their range. We included cv. ‘Merlot’ in our experiment, because of its growing expansion and climate demanding. Differences in average month temperature, average precipitation and average relative humidity are present within the winegrowing région. Results of calculate indexes and coefficients proved significant statistic differences in the data among different meteorological stations (Statgraphics 4.0). Also quantity and quality differences of yield among vineyards are statistic significant. Ail climatic and harvest differences within Goriska brda winegrowing region confirm a necessity by dividing this region into smaller winegrowing places (cca. 80 ha) and winegrowing positions (cca. 15 ha). Such ‘microregionalisation’ assures proper, cheaper wine growing and better quality of grape.

DOI:

Publication date: February 15, 2022

Issue: Terroir 2002

Type: Article

Authors

Denis RUSJAN (1), doc. dr. Zora KOROSEC-KORUZA (1), prof. dr. Lucka KAJFEZ-BOGATAJ (2)

(1) University of Ljubljana, Biotechnical Faculty, Agronomy Department, Viticulture Group, Jamnikarjeva 101, Ljubljana, Slovenija
(2) University of Ljubljana, Biotechnical Faculty, Agronomy Department, Jamnikarjeva 101, Ljubljana, Slovenija

Contact the author

Keywords

viticulture, région viticole, zonage, index météorologique, merlot
viticulture, winegrowing region, zonage, meteorological index, merlot

Tags

IVES Conference Series | Terroir 2002

Citation

Related articles…

Lead levels in fortified wines

AIM The main lead exposure route is the intake of contaminated food, water, and alcoholic beverages, in particular wine. At the gastric level, Pb is transformed into a soluble compound which, when conveyed into the bloodstream, is the long-term cause of saturnism, intoxication with neurotoxic, nephrotoxic and hematopoietic effects, and with the neurological developmental delay of children. Pb is classified by the International Agency for Research on Cancer as a 2A class, possible carcinogenic to humans. In an opinion on possible health risks, CONTAM considered that cereals, vegetables, drinking water, and wine give a greater contribute to dietary exposure to Pb in Europe. Large quantities of wine, beer, and other alcoholic products drinking can increase daily Pb intake above the maximum permitted levels.

Mesoclimate impact on Tannat in the Atlantic terroir of Uruguay

The study of climate is relevant as an element conditioning the typicity of a product, its quality and sustainability over the years. The grapevine development and growth and the final grape and wine composition are closely related to temperature, while climate components vary at mesoscale according to topography and/or proximity to large bodies of water. The objective of this work is to assess the mesoclimate of the Atlantic region of Uruguay and to determine the effect of topography and the ocean on temperature and consequently on Tannat grapevine behavior.

Chemical markers in wine related to low levels of yeast available nitrogen in the grape

Nitrogen is an important nutrient of yeast and its low content in grape must is a major cause for sluggish fermentations. To prevent problems during fermentation, a supplementation of the must with ammonium salts or more complex nitrogen mixtures is practiced in the cellar. However this correction seems to improve only partially the quality of wine [1]. In fact, yeast is using nitrogen in many of its metabolic pathways and depending of the sort of the nitrogen source (ammonium or amino acids) it produces different flavor active compounds. A limitation in amino acids can lead to a change in the metabolic pathways of yeast and consequently alter wine quality.

From precursor identification to the study of the distribution of 3-methyl-2,4-nonanedione in red wines and spirits

Prematurely aged red wines are marked by intense prune and fig aromatic nuances that dominate the complex bouquet that can be achieved through bottle aging.

Managing nitrogen balance in cover-cropped vineyard

In this audio recording of the IVES science meeting 2022, Thibaut Verdenal (Agroscope, Pully, Switzerland) speaks about managing nitrogen balance in cover-cropped vineyard. This presentation is based on an original article accessible for free on OENO One.