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…

Smoke tainted wine – what now?

The frequency of bushfires close to wine regions around the world has increased in the last two decades. The economic losses incurred when grapes and wines are discarded due to ‘smoke taint’ are substantial (i.e., hundreds of millions of dollars). Efforts to mitigate and ameliorate smoke taint are therefore crucial. Chardonnay, rosé and cabernet sauvignon wines made from grapes exposed to smoke during the 2020 wildfires in eastern Australia were subjected to various amelioration techniques: the addition of activated carbons, molecularly imprinted polymers (mips), and a proprietary resin (either directly, or following membrane filtration); spinning cone column (scc) distillation; and finally, transformation into vinegar.

Tasting soils in Pinot noir wines of the Willamette valley, Oregon

The conventional wisdom of vintners is that alkalinity, and thus less sour and more rounded taste, are enhanced in wine and grapes challenged by low-nutrient soils.

Can the satellite image resolution be improved to support precision agriculture in the vineyard through vegetation indices?

Aim: This study aims to show the application of a new methodological approach to improve the resolution of Sentinel-2A images and derived vegetation indices through the results from different vineyards. 

Vineyard Landscape in Vale dos Vinhedos: Pressure and Protection

The region with Origin Indication Vale dos Vinhedos (IPVV) is located in the cities of Bento Gonçalves, Garibaldi and Monte Belo do Sul. It was established in November 2002, through an act of Instituto Nacional de Propriedade Industrial, according to Resolução INPI Nº. 75, of 2000, and Law Nº. 9.279 of 1996. The changes on the grape growing and wine making in the last 15 years, with the expansion of grapevines Vitis viníferas cultivation, the installation of several modern family wine companies, making wine with competitive quality, among other aspects, have enabled the implementation of concepts of Geographical Indications.

Influence of the different cork stoppers and sulfur dose in champagne quality

As is well known, Champagne is a product of the highest quality recognized in the international market. Champagne is a type of sparkling wine made in the Champagne region