Macrowine 2021
IVES 9 IVES Conference Series 9 Which heat test really represents the haze risk of a white Sauvignon wine ?

Which heat test really represents the haze risk of a white Sauvignon wine ?

Abstract

AIM: Different heat tests are used to predict a white wine haze risk after bottling. The most used tests are 30-60 min. at 80°C. Nevertheless, there is a lack of information about the relationship between the wine haze observed after such tests and the turbidities observed in the bottles after the storage/transport of the wines in more realistic Summer conditions (35-46°C during 3-12 days).

 METHODS: 24 Sauvignon wines (Loire Valley – France) produced during the vintages 2018 and 2019 were studied. Six heat tests were applied on during 5-30-60 min. at 80°C and during 30-60-120 min. at 50°C. The results were compared with the turbidity reached by the wines under Summer conditions (35 to 46°C, from 1 to 14 days) and representing 6 tests too. The Pearson correlation coefficients (PCC) were calculated for all of these 12 heat tests when compared two by two.

RESULTS: The turbidities of the wines subjected to Summer temperature conditions (35-43°C) were highly correlated with the turbidities developed by the Sauvignon wines after heating 30 or 60 min. at 50°C (0.980

DOI:

Publication date: September 7, 2021

Issue: Macrowine 2021

Type: Article

Authors

Marchal Richard

Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France., Lecomte Marine  Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France.  Salmon Thomas Laboratoire d’Œnologie, Université de Reims, Reims, France. LVBE, Université de Haute-Alsace, Colmar, France.  Robillard Bertrand Institut Oenologique de Champagne, Mardeuil, France.

Contact the author

Keywords

wine haze, heat tests, sauvignon, pearson correlations

Citation

Related articles…

Effect of different canopy managements on microclimate and carbon allocation in Vitis vinifera cv Chardonnay

Climate change strongly affects the wine-growing sector which increasingly requires in situ adaptation strategies aimed at preserving the sustainability of production. Investigating microclimate becomes crucial in comprehending environmental pressures on plants. The microclimatic investigation conducted in the Orvieto PDO (central Italy) allowed us to highlight the climatic dynamics occurring in the last 25 years and the frequency and intensity of abiotic stresses. Two management strategies for the canopy were identified: early defoliation (ELR) and foliar application of Basalt Flour ® (FB) compared to the ordinary management (C) of the company (bud selection and topping). The effects on plant vigour indices (LAI), resource allocation in terms of carbon stored in the above-ground organs of the vine, and the microclimate of the canopy and the berry were evaluated. In particular, microclimate was evaluated through a network of sensors connected wirelessly (Wireless Sensor Network), dedicated to collecting information on temperature and humidity in the canopy and clusters.

From precursor identification to the study of the distribution of 3-methyl-2,4-nonanedione in red wines and spirits

Prematurely aged red wines are marked by intense prune and fig aromatic nuances that dominate the complex bouquet that can be achieved through bottle aging.

Precision viticultural strategy for managing intra-vineyard variability in grape aroma using UAV-based vigour indices

In several cultivars, such as Gewürztraminer and Riesling, grape and wine aromas are determined by volatile terpenoids.

Baccus: from framework to web platform for self-assessment of wine sustainability

Sustainability is becoming an increasingly present challenge, whether due to an increase in the level of perception and demand from consumers and stakeholders or the rise of events linked to climate change, which directly impacts agricultural-based sectors such as the vine and wine industry.

Impact des systèmes de conduite, de la gestion des sols et de la capacité de rétention d’eau des sols sur l’état hydrique de la vigne à Cognac

Dans le cadre de TerclimPro 2025, Sébastien Zito a présenté un article IVES Technical Reviews. Retrouvez la présentation ci-dessous ainsi que l’article associé : https://ives-technicalreviews.eu/article/view/9161