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IVES 9 IVES Conference Series 9 Etude des effets millésime, situation et sol à partir d’un observatoire du Gamay en beaujolais

Etude des effets millésime, situation et sol à partir d’un observatoire du Gamay en beaujolais

Abstract

Des expérimentations sur Gamay ont été réalisées en Beaujolais de 2000 à 2006 sur 10 parcelles d’AOC différentes. De nombreuses mesures ont été effectuées à différents stades (vigne, baies récoltées, vinification et bouteille avec ou sans vieillissement). Ces mesures sont également de natures différentes (données phénologiques, analytiques, dégustation). Des analyses de la composition des sols sont également disponibles. Des travaux d’analyse de données ont permis d’effectuer une analyse exploratoire de la base de données afin de déterminer et quantifier les effets de divers facteurs (parcelle, millésime) sur certains des paramètres mesurés au cours du procédé de vinification. Ces effets ont également été mis en relation avec l’analyse des sols.

Les résultats confirment l’effet important du millésime. Une typologie des millésimes se dégage grâce aux outils utilisés. Un fort effet parcelle est également mis en évidence. Une corrélation existe entre couleur et acidité. Il est vérifié que la variable de rendement n’est pas responsable de l’effet parcelle pour les témoins. L’effet parcelle est en partie bien expliqué par la précocité, liée en général à l’altitude et au climat. Par contre cet effet est peu expliqué par le type d’AOC. La typologie de composition des sols présente un lien avec le type d’AOC. Les Beaujolais-Villages présentent notamment une bonne homogénéité. La composition des sols semble avoir peu d’impact sur le raisin et le vin produits sur les témoins.

English version: From 2000 to 2006 an important study was carried out on 10 plots in different Beaujolais AOC. Numerous measures were made at different stages (vine, must, vinification) with different nature (phenology, chemical, sensorial analysis). Data analysis have allowed to determine and quantify factor effects such as situation or vintage on wine characteristics. Soil analysis were also used in this study.

Results confirm important effect of vintage and it is possible to classify the different vintages with statistic tools used in this study. An important situation effect, independent of yield, was also highlighted. This effect is well explained by earliness but poorly by AOC. A strong correlation exists between wine color and acidity. There is a good relation between soil type and AOC, particularly with Beaujolais-Villages. But soil composition seems to have a weak influence on grape and wine characteristics.

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Publication date: October 6, 2020

Issue: Terroir 2010

Type: Article

Authors

V. Lempereur (1), S. Preys (2), J.Y. Cahurel (1)

(1) IFV-SICAREX-Beaujolais, 210 boulevard Vermorel, BP 320, 69661 Villefranche Cedex, France
(2) Ondalys, 385 avenue des Baronnes, 34730 Prades-le-Lez, France

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Keywords

Data analysis – earliness – situation – soil – vintage

Tags

IVES Conference Series | Terroir 2010

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