terclim by ICS banner
IVES 9 IVES Conference Series 9 Investigating water stress-related seasonal and spatial patterns and the possible links with juice and wine compositional parameters

Investigating water stress-related seasonal and spatial patterns and the possible links with juice and wine compositional parameters

Abstract

The mapping of spatial variability in vineyards offers the potential to implement zonal management strategies with the aim to optimize economic benefits and increase sustainability by managing natural resources, such as water used for irrigation, more optimally. This study characterized the (natural) variability in plant water status in a commercial Cabernet Sauvignon block, using remote sensing techniques, and identified the impact of this variability on the yield, and juice and wine composition. From the field data collected over two growing seasons, we demonstrated that remote sensing techniques are a practical and powerful tool for mapping spatial variability within vineyard blocks. The results of this study show the presence of consistent spatial patterns over seasons and highlight the potential of using monitoring techniques to categorize distinct zones within the vineyard with a clear impact on quality parameters, especially in the most water stressed vines, exhibiting higher levels of anthocyanins, tannins, polymeric pigments, total phenolic index, and colour density compared to low water stress vines. Correlation analysis demonstrated significant and complex relationships between water stress and various parameters. Notably, canopy parameters determined by remote sensing techniques emerged as a key influencer, showing correlations with vinicultural parameters like pruning weight, number of bunches, and yield.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Anke Berry1, Melane A. Vivier1, Carlos Poblete-Echeverria1*

1 South African Grape and Wine Research Institute (SAGWRI), Faculty of AgriSciences, Stellenbosch University, Matieland 7602, South Africa

Contact the author*

Keywords

Spatial variability, Precision viticulture, Remote sensing, water stress, juice and wine composition

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Cultures des vignobles en forte pente: possibilités de mécanisation. Effet de l’exposition et de l’orientation des rangs

Plus de la moitié du vignoble suisse (14’000 ha) est situé sur des coteaux en forte pente (> 30%). Dans certains vignobles, la pente naturelle du terrain a été réduite par la construction de terrasses soutenues par des murs.

Read More

The role of terroir in tourism led amenity migration: contrasting effects in Tuscany and the Okanagan valley of British Columbia

Definitions of terroir elude consistent agreement. As defined geographical space the common denominators of its conceptualization include natural and cultural elements of life

Read More

WINE FERMENTATION METABOLITES PRODUCED BY TWO TORULASPORA DELBRUECKII STRAINS ISOLATED FROM OKANAGAN VALLEY, BC, CANADA VINEYARDS

Wine aroma is influenced by various factors, from agricultural practices in the vineyard to the enological choices made by winemakers throughout the vinification process. Spontaneous fermentations have a characteristically deeper complexity of aromas when compared to fermentations that have been inoculated with Saccharomyces (S.) cerevisiae because of the diversity of microflora naturally present on grape skins. Non-Saccharomyces yeast are being extensively studied for their ability to positively contribute to wine aroma and flavour. These yeasts are known to liberate more bound volatile compounds present in grape must than S. cerevisiae through the enzymatic action of β-glucosidases and β-lyases1.

Read More

Sensory analysis in oenology: the role of methodological differences in expert panel evaluations

Sensory analysis is an essential component of oenology, offering valuable insights into wine quality that influence decision-making in viticulture and winemaking.

Read More

Evaluation of Polarized Projective Mapping as a possible tool for attributing South African Chenin blanc dry wine styles

Multiple Factor Analysis (MFA) According to the Chenin blanc Association of South Africa, there are three recognized dry wine styles, Fresh and Fruity (FF), Rich and Ripe Unwooded (RRU), and Rich and Ripe Wooded (RRW), classically attributed with the help of sensory evaluation. One of the “rapid methods” has drawn our attention for the purpose of simplifying and making style attribution for large sample sets, evaluated during different sessions, more robust. Polarized Projective Mapping (PPM) is a hybrid of Projective Mapping (PM) and Polarised Sensory Positioning (PSP). It is a reference-based method in which poles
(references) are used for the evaluation of similarities and dissimilarities between samples.

Read More