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”


[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.


Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article


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


IVES Conference Series | Terroir 2000


Related articles…

A new AI-based system for early and accurate vineyard yield forecasting

Vineyard yield forecasting is a key issue for vintage scheduling and optimization of winemaking operations. High errors in yield forecasting can be found in the wine industry, mainly due to the high spatial variability in vineyards, strong dependency on historical yield data, insufficient use of agroclimatic data and inadequate sampling methods

Fleurtai, Soreli and Tocai Friulano: perspectives for quality integration of wine together with protection of the DOCG Lison Classico appellation

In modern viticulture, sustainability must be considered not only into the winery, but in the vineyard as well, being that with the most attentive interventions in order to protect the environment. In this context, the new “fungi resistant” varieties represent a valid option for reducing the negative environmental impact of agrochemicals used in viticulture, including those ones used in organic farming (given the copper accumulation into soils). Several application studies have demonstrated the enological validity of many resistant varieties, both in price and as a blend. Also, under the production point of view, the feasibility and economical sustainability of the new resistant varieties was verified. The aim of this work was to deepen the knowledge on the organoleptic characteristics of wines obtained from the Fleurtai and Soreli varieties and to compare them with the wine obtained from Tocai Friulano, the mother variety in the area destined for the production of the Lison Classico DOCG appellation. The purpose of the work is then to verify the possibility of introducing resistant varieties into the DOCG while maintaining the wine name of the appellation linked to the territory.

What do we know about the kerosene/petrol aroma in riesling wines?

1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) is a controversial aroma component found in Riesling wines. It belongs to the family of C13-norisoprenoids and is mainly associated with kerosene/petrol notes. TDN can add complexity to the wine aroma at medium – low concentrations and deteriorate the wine bouquet when its content is high. No TDN aromas are usually perceived in young Riesling wines, but they can appear after several years of aging due to the gradual formation of TDN. Management of TDN in Riesling wines is an actual task, since global warming can promote formation of this compound and compromise the aromatic composition of wine. Therefore, the aim of the current work was, firstly, to study the sensory particularities of TDN in Riesling wine at various concentrations. Secondly, to investigate the ability of bottle closures to absorb (scalp) TDN from Riesling wine under various storage conditions. These studies also include the comparative assessment of our findings with previously published data. METHODS: sensory analysis, GC-MS (SBSE), HPLC,1H-NMR and other methods related to the synthesis and determination of TDN. RESULTS: First of all, the method of the synthesis of highly purified TDN (95% and 99.5%) was optimized [1].

Effect of the winemaking technology on the phenolic compounds, foam parameters in sparklig wines

Contribution Sparkling wines elaborated following the traditional method undergo a second fermentation in closed bottles of base wines, followed by aging of wines with lees for at least 9 months. Most of the sparkling wines elaborated are white and rosé ones, although the production of red ones is highly increasing. One of the initial problems in red sparkling wine processing is to obtain suitable base wines that should have moderate alcohol content and astringency and adequate color intensity; which is difficult to obtain when grapes must be harvested at low phenolic and industrial maturity stage. The low phenolic maturity degree in the red grapes makes essential to choose an adequate winemaking methodology to obtain the base wines because the extracted polyphenols will vary according the winemaking technique: carbonic maceration or destemmed-crushed grapes.

Integration of the AOC and terroir concepts by future professionals of the international wine sector

A survey has been conducted on 32 students and 25 former students of 28 nationalities of an international master course training executives of the international Wine sector.