GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Effect of climate and soil on phenology and ripening of Vitis vinifera cv Touriga acional in the Dão region

Effect of climate and soil on phenology and ripening of Vitis vinifera cv Touriga acional in the Dão region

Abstract

Context and purpose of the study – “Terroir” has been acknowledged as an important factor in wine quality and style. It can be defined as an interaction between climate, soil, vine (cultivar, rootstock) and human factors such as viticultural and enological techniques. Soil and climate are the two components of the “Terroir” with an important role on the vine development and berries ripening. The present study is focused on the effects of the weather conditions and the soil characteristics on the phenological and berries ripening dynamics of the “Touriga Nacional” in Dão region.

Material and methods – This assay was carried out during 2017 and 2018 in four commercial vineyards at different places at Dão Region, centre of Portugal, with red grapevine variety Touriga Nacional. For each field were defined 3 plots were defined, and the observations were carried out in 10 plants per plot. Meteorological data was recorded at automatic stations localized next each vineyard. For the soil characterization, soil samples were taken in three layers until the 200 cm depths. Between budburst and veraison, the phenological stages were monitored using the E-L modify scale. During the ripening period, weekly, samples with 200 berries per plot were taken, determined their weights and juice volumes, and analysed their sugar contents, total acidity and pH. The anthocyanins accumulation was indirectly monitored, using the fluorescence optical sensor Multiplex, on six clusters per plot.

Results – The results showed similar characteristics of soils at the different vineyard, but different weather condition between places and years. The lag of the chronological evolution of the phenology and ripening between places and years was mainly due to the different thermal conditions of each place in each year.

Download the PDF

DOI:

Publication date: September 8, 2023

Issue: GiESCO 2019

Type: Poster

Authors

Pedro RODRIGUES1,2,3, Vanda PEDROSO4, Alexandre PINA1, Gonçalo LOURENÇO1, António CAMPOS1, Sérgio SANTOS1, Tiago SANTOS1, Sílvia LOPES 1, João GOUVEIA1, Carla HENRIQUES1,2, Ana MATOS1,2, Cristina AMARO DA COSTA1,2, Fernando GONÇALVES1,2,3

1 Instituto Politécnico de Viseu, Campus Politécnico, Viseu, Portugal
2 Centro de Estudos em Educação, Tecnologia e Saúde, Instituto Politécnico de Viseu, Viseu, Portugal
3 CERNAS, Centro de Estudos de Recursos Naturais, Ambiente e Sociedade, Instituto Politécnico de Viseu, Campus Politécnico, Viseu, Portugal
4 Centro Estudos Vitivinícola do Dão. Direção Regional de Agricultura e Pescas do Centro, Nelas, Portugal

Contact the author

Keywords

soil, climate, phenology, ripening, Touriga Nacional

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Reconocimiento geoedafológico para la zonificación vitivinícola de la D.O. Montilla-Moriles

En la región vitivinícola con D.O. Montilla-Moriles (Córdoba) la variabilidad geologico-petrográfica de los terrenos es grande (ROLDÁN GARCÍA y DIVAR RODRÍGUEZ, 1988 a; roldán garcía et al.
Read More

UHPLC-HRMS analysis for the evaluation of formation and degradation of polysulfides in wine 

The contribution of sulfur compounds to wine aroma has been studied for several years, as their role can be either positive, contributing to the fruitiness and typicity of some white wines like Sauvignon blanc, or negative when related to off-flavours caused by H2S.

Read More

Temperature effects on the biosynthesis of aroma compounds in glera grapes

This paper describes the first year results of a study that investigated the effects of altitude and related temperature parameters on the biosynthesis of aromas in the Italian cultivar Glera.

Read More

Nitrogen partitioning among vine organs as a consequence of cluster thinning

Agroscope is investigating the impact of yield on nitrogen (N) partitioning in grapevine and on must composition. The mechanism of N assimilation

Read More

The combined effects of climate, soils, and deficit irrigation on yield and quality of Touriga Nacional under high atmospheric demand in the Douro Region

Global warming is one of the biggest environmental, social and economic threats in several viticultural regions. In the Douro Valley, changes are expected in the coming years, namely an increase in temperature and a decrease in precipitation. These changes are likely to have consequences for the production and quality of wine.
The aim of this study was to explore the effects of different soil characteristics combined with several deficit irrigation strategies, managed throughout ETc references and predawn leaf water potentials thresholds, on physiology, yield, and qualitative attributes on the Touriga Nacional variety under years of mild to severe water and heat stress.
The studies were conducted over seven years (2015 to 2021) in two plots of a commercial vineyard located at Quinta do Ataíde (Symington Family Estates) planted in 2011 and 2014 at 170 meters elevation, growing under three water regimes: non-irrigated (NI) and two deficit irrigation strategies (30% and 60% ETc) assessed weekly by Ψpd. The site has an annual rainfall below 500 mm, with high atmospheric demand. Climate data was collected from a weather station, located on site. Berry ripening was followed weekly for fruit analysis. At harvest, yield, vigour and pruning weight per vine were determined from 90 vines by treatment. Each season at veraison the NDVI Index was accessed by a drone. The soils physic-chemistry in the experimental blocs were analysed and grouped by SWHC. Delta C-13 analyses were also performed per treatment in two years.Irrigation had a positive effect on yield per vine, mostly due to an increase in berry and cluster weight, and fertility index through the years. A significant increase in sugar content, colour and phenols was observed with deficit irrigation in some years, but vine vigour related to soil characteristics had by far the greatest impact on quality.

Read More