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.

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…

Above and below: soil moisture and soil temperature interact to alter grapevine water relations

The combined effect of soil moisture and soil temperature on grapevine physiology is gaining interest in the context of global warming.

Grapevine gas exchange responses to combined variations of leaf water, nitrogen and carbon status – a case of study of fungi tolerant varieties

In the context of climate change and the need to reduce inputs, optimising photosynthesis and grapevine performance requires a better understanding of the interactions between water status, nitrogen availability, and source-sink relationships.

Mitigation of retronasal smoke flavor carryover in the sensory analysis of smoke affected wines

With the steady rise in wildfire occurrence in wine regions around the world, there are quality issues beginning to face the wine industry. These fires produce clouds of smoke which have the ability to carry organic molecules across vast distances that can be absorbed by grapes. When these compounds make their way into the final wine, unpleasant smokey and burnt flavors are present, along with a lasting ashy finish. Along with the volatile compounds carried by smoke, once incorporated into the fruit these compounds become bound to sugars, forming glycosidic compounds.

Characterization of the thiol aromatic potential of a new resistant grape variety: Floreal

Aims: Due to climate change and the desire to decrease enological inputs (organic farming), the vineyard has to be modified and the selection of new resistant grape varieties as an alternative is researched intensively today. From January 2018, four new grape varieties that are resistant against mildew and odium have been added to the official

Spiders in vineyards show varying effects of inter-row management and the surrounding landscape

In vineyards, management and the surrounding landscape can have different effects on spiders. In temperate regions management (organic vs. conventional) may have less strong effects than for other crops.