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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

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