Terroir 1996 banner
IVES 9 IVES Conference Series 9 Conduite en Lys: résultats pendant la formation du système avec le cépage Loureiro dans la région des “Vinhos Verdes”

Conduite en Lys: résultats pendant la formation du système avec le cépage Loureiro dans la région des “Vinhos Verdes”

Abstract

[English version below]

Dans la région des “Vinhos Verdes” les études sur les systèmes de conduite de la vigne sont très importantes et beaucoup de travaux ont été faits pendant les dernières années. Cet essai, avec la nouvelle conduite Lys, a été installé en 1996 dans la Station Vitivinicole Amândio Galhano (EVAG) située au nord-ouest du Portugal. Les résultats presentés se rapportent dans les deux premiéres années de formation du système Lys: 1998 et 1999.
On étudie huit clones du cépage Loureiro gréffés sur deux porte-greffes: 101-14 et 1103P. La densité de plantation est de 3.333 ceps par hectare (3,0 m x 1,0 m). Deux niveaux de charge ont été appliqués: C1 = 9.999 vs C2 = 19.998 bourgeons/ha en 1998 et C1 = 33.330 vs C2 = 46.662 bourgeons/ha en 1999.
En ce qui concerne la conduite des jeunes souches, il est très important le choix des unités permanentes (bras et épaules) pendant le développement végétatif, en sélectionnant les sarments les plus vigoureux et les plus bien placés.
Le plus bas niveau de charge en 1998 (C1 = 9.999) fut insuffisant en provoquant des sarments trop vigoureux et conséquemment un pourcentage élevé de sarments cassés, tandis que, le plus haut niveau de charge en 1999 (C2= 46.662) a provoqué des rendements significativement plus élevés mais accompagnés de pertes de qualité du moût. Le système Lys a revélé précocement un élevé potentiel de rendement et qualité (2-3 ans). D’ autre part, le porte-greffe 101-14 dans ce cépage et dans ce système a été au-dessus du porte-greffe 1103P soit au niveau du rendement soit au niveau de la qualité.

In the ‘Vinhos Verdes’ region the studies about vine training systems are very importants and many works were made in the last years. This research, with the new system Lys, was installated in 1996 at the ‘Amândio Galhano Viticulture Station’ in the north-west of Portugal. The results were carried out in the formation system period: 1998-1999.
We are studing eight clones of Loureiro grapevine grefted onto two rootstocks varieties: 101-14 and 1103P. The plants are arranged according to the rectangular plan of 3,0 m x 1,0 m (3.333 plants/ha) and the bud loads were: C1 = 9.999 vs C2 = 19.998 buds/ha in 1998 and C1 = 33.330 vs C2 = 46.662 buds/ha in 1999.
In the formation period, it is very important the choice of the permanent unities during the vegetal development, making a selection about the most vigorous and the best placed shoots.
The lowest bud load in 1998 (C1=9 999) was insufficient making a very vigorous shoots and consecutively many shoots broken by the wind; on the other hand, the highest bud load in 1999 (C2 = 46 662) showed significantly higher yields and lower must weights. Also, the rootstock variety 101-14 was better than 1 103P variety in the yield and quality levels. The training system Lys showed un early produce and quality potential.

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

T. Mota (*), J. Garrido (*), M.J. Pereira (*), M. Lima-Ferreira (**), R. Castro (***)

(*) Comission de Viticulture de la Région des “Vinhos Verdes” (CVRVV). Porto
(**) Faculté de Sciences de l’Université du Porto (FCUP). Porto
(***) Institut Supérieur d’Agronomie (ISA). Lisbonne

Tags

IVES Conference Series | Terroir 2000

Citation

Related articles…

Merging fast sensory profiling with non-targeted GC-MS analysis for multifactorial experimental wine making

Wine aroma is influenced by several viticultural and oenological factors. In this study we used experimental wine making in a full factorial design to determine the impact of grapevine age, must turbidity, and yeast strain on the aroma of Vitis vinifera L. cv. Riesling wines. A recently developed, non-targeted SPME-GC-MS fingerprinting approach for wine volatiles was used. This approach includes the segmentation and mathematical transformation of chromatograms in combination with Parallel Factor Analysis (PARAFAC) and subsequent deconvolution of important chromatogram segments.

Aromatic profile evolution of corvina, corvinone and rondinella grapes during withering

AIM AND METHODS: Grape withering is one of the key steps in the production of the most renowned red wines of the Valpolicella area, namely Amarone and Recioto. This practice, which was already used since Roman times, entails important modifications in grape composition and in the chemical and sensorial characteristics of the corresponding wines, especially in terms of aromatic profile. The aim of this research is evaluating the aromatic evolution during grape withering of the three main varieties used in Valpolicella wines: Corvina, Corvinone and Rondinella.Samples of the three varieties were analyzed at harvest and at different stages of withering, namely10%, 20% and 30% of weight loss. Free and glycosidically bound compounds were extracted and analyzed using Gas Chromatography- Mass Spectrometry (GC-MS). RESULTS: For all the samples the data were normalized to eliminate the effect of concentration due to grape dehydration. Terpene content and evolution varied considerably in relationship to grape variety. Corvinone was richer in cyclic terpenes (including phellandrene, limonene, and cymene) and they decreased during withering.

Influence of edapho-climatic factors on grape quality in Conca de Barberà vineyards (Catalonia, Spain)

Soil and climate of 3 vineyards have been characterised in order to determine their influence on grape quality. These vineyards are located in Conca de Barberà (Catalonia, NE Spain) and belong to Cabernet sauvignon and Grenache noir cultivars. All 3 plots are very close, so only interannual climatic data of the nearest meteorological station have been considered.

Overview on wine and health 32 years after the French paradox 

Phenolic compounds or polyphenols are the most abundant and ubiquitous secondary metabolites present in the plant kingdom with more than 8000 phenolic structures currently known. These compounds play an important role in plant growth and reproduction, providing protection against biotic and abiotic stress such as pathogen and insect attack, UV radiation and wounding. (poly)phenols are widely distributed in the human diet mainly in plant-derived food and beverages (fruits, vegetables, nuts, seeds, herbs, spices, tea and red wine).

Towards the definition of a terroir of grape dehydration for the production of ‘Passito’ wines in Valpolicella (Italy)

Aim: The aim of this study was to investigate the relationship between the molecular response of grapes during postharvest dehydration and the specific environment of two naturally ventilated rooms (called ‘fruttai’), located in two different sites in Valpolicella