Terroir 2008 banner
IVES 9 IVES Conference Series 9 Ripening potential of Touriga Nacional variety with different canopy management techniques and in different regions (Dão, Bairrada and Vinhos Verdes)

Ripening potential of Touriga Nacional variety with different canopy management techniques and in different regions (Dão, Bairrada and Vinhos Verdes)

Abstract

Foreseeing climatic changes, the abnormally hot and dry year of 2005 can be revealer of some varieties behavior in different climatic conditions. In three experiments, done in private companies, (Dão Sul, Caves Messias and Quinta de Lourosa), the behavior of ‘Touriga Nacional’ vine variety, with different technological itineraries, was studied.
In Dão, it was evaluated the influence of shoot density (23, 17 and 11 for linear meter of canopy) and qualitative cluster thinning at veraison. In Bairrada, the traditional vine trellising has been compared with the Lys system. In both conduction systems has been evaluated the influence of qualitative cluster thinning at veraison. In Vinhos Verdes, in the system LYS 2/3, has been studied the effect of shoot density (29 and 20 for linear meter of canopy) and leaf removal associated to qualitative cluster thinning at veraison.
In these three regions, two of them that are not traditional places for this variety, the ‘Touriga Nacional’ reached high levels of yield and quality, in adjusted technological itineraries. Cluster thinning reduced yield in all cases, as it was expectable, with gains of PAC only in Bairrada. In a general way, different levels of canopy management (leaf removal and shoot suppression) didn’t play an important role. In Dão, the greatest shoot density originated a higher yield, without quality decrease.
In these three regions, two of which not traditional of this chaste one, the Touriga Nacional disclosed high levels of
In a global way, the ‘Touriga Nacional’ vine variety demonstrated high potentials of yield and maturation, in all regions. But in situations of high hydric stress, as verified in Bairrada, the reduction of production lead to significant improvements of quality.

Download the PDF

DOI:

Publication date: December 8, 2021

Issue: Terroir 2008

Type: Article

Authors

Rogério de CASTRO, Manuel BOTELHO, Amândio CRUZ

Instituto Superior de Agronomia – Viticultura

Contact the author

Keywords

Vinhos Verdes, Dão, Bairrada, Touriga Nacional, LYS

Tags

IVES Conference Series | Terroir 2008

Citation

Related articles…

Comparison of integrated, organic and biodynamic viticultural practices

In this video recording of the IVES science meeting 2021, Johanna Döring (Hochschule Geisenheim University Department of General and Organic Viticulture, Geisenheim, Germany) speaks about the comparison of integrated, organic and biodynamic viticultural practices. This presentation is based on an original article accessible for free on OENO One.

Read More

Climat et sol: critères d’évaluation et effets sur le comportement de la vigne

Le zonage viticole aborde en premier lieu la caractérisation des macroclimats aux échelles des grandes régions, pays, continents ou monde (géoviticulture).

Read More

Il sistema vigneto del Lago di Bolsena: caratterizzazione della produzione di Cannaiola di Marta

Il comprensorio del Lago di Bolsena (VT) è un territorio ad elevata vocazione vitivinicola in cui il paesaggio della vite storicamente persiste e caratterizza la fisionomia dei luoghi. Qui gli agroecosistemi viticoli possiedono una valenza ecologico-ambientale, storico-culturale ed economica di rilievo.

Read More

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.

Read More

Biodiversity and biocontrol ability of Trichoderma natural populations in soil vineyards from Castilla y León region (Spain)

Trichoderma is a microorganism present in many agricultural soils and some of its species could be used as natural biological control agents. In this work, the presence of natural populations of Trichoderma was estimated in soil vineyard and its biocontrol capacity against Phaeoacremonium minimum, one of the main agent causals of grapevine trunk diseases instead of using pesticides. Moreover, physicochemical variables in soil such as pH, organic matter and nutrients were evaluated to determine a possible correlation to natural populations of Trichoderma.

Read More