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.

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…

Physiological and growth reaction of Shiraz/101-14 Mgt to row orientation and soil water status

Advanced knowledge on grapevine row orientation is required to improve establishment, management and outcomes of vineyards on terroirs with different environmental conditions (climate, soil, topography) and in view of a future change to more extreme climatic conditions. The purpose of this study was to determine the combined effect of row orientation, plant water status and ripeness level on the physiological and viticultural reaction of Shiraz/101-14 Mgt.

Effects of mechanical leafing and deficit irrigation on Cabernet Sauvignon grown in warm climate of California

San Joaquin Valley accounts for 40% of wine grape acreage and produces 70% of wine grape in California. Fruit quality is one of most important factors which impact the economical sustainability of farming wine grapes in this region. Due to the recent drought and expected labor cost increase, the wine industry is thrilled to understand how to improve fruit quality while maintaining the yield with less water and labor input. The present study aims to study the interactive effects of mechanical leafing and deficit irrigation on yield and berry compositions of Cabernet Sauvignon grown in warm climate of California.

The effects of cane girdling on berry texture properties and the concentration of some aroma compounds in three table grape cultivars

The marketability of the table grapes is highly influenced by the consumer demand; therefore the market value of the table grapes is mainly characterized by its berry size, colour, taste and texture. Girdling could cause accumulation of several components in plants above the ringing of the phloem including clusters and resulting improved maturity. The aim of the experiments was to examine the effect of girdling on berry texture characteristics and aroma concentration.

Application of a fluorescence-based method to evaluate the ripening process and quality of Pinot Blanc grape

The chemical composition of grape berries at harvest is one of the most important factors that should be considered to produce high quality wines. Among the different chemical classes which characterize the grape juice, the polyphenolic compound, such as flavonoids, contribute to the final taste and color of wines. Recently, an innovative non-destructive method, based on chlorophyll fluorescence, was developed to estimate the phenolic maturity of red grape varieties through the evaluation of anthocyanins accumulated in the berry skin. To date, only few data are available about the application of this method on white grape varieties.

Different yield regulation strategies in semi-minimal-pruned hedge (SMPH) and impact on bunch architecture

Yields in the novel viticulture training system Semi-Minimal-Pruned Hedge (SMPH) are generally higher compared to the traditional Vertical Shoot Positioning (VSP). Excessive yields have a negative impact on the vine and wine quality, which can result in substantial losses in yield in subsequent vintages (alternate bearing) or penalties in fruit quality. Therefore yield regulation is essential. The bunch architecture in SMPH differs from VSP. Generally there is a higher amount but smaller bunches with lower single berry weights in SMPH compared to VSP.