Temperature-based grapevine sugar ripeness modelling for a wide range of Vitis vinifera L. cultivars

Parker, Amber; Cortázar-Atauri, I. García de; Gény, Laurence; Spring, Jean-Laurent; Destrac, Agnes; Schultz, Hans R.; Molitor, Daniel; Lacombe, Thierry; Graça, António; Monamy, Christine; Stoll, Manfred; Storchi, Paolo; Trought, Michael C. T.; Hofmann, Rainer; Leeuwen, Cornelis van

doi:10.1016/j.agrformet.2020.107902

Cited by 65 publications

(111 citation statements)

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“…Among the varieties of cluster 2, heat requirements for Moschofilero are possibly underestimated because in the Mantinia PDO area, one of the coolest in Greece (Koufos et al, 2017), it is commonly harvested at suboptimal sugar levels. In such cases, data for budbreak, flowering and véraison stages could be used or the approach proposed by Parker et al (2020) targeting for specific sugar content. However, since such observations are rarely recorded on a regular basis by Greek producers and if so, they are limited to only few varieties and years.…”

Section: Discussionmentioning

confidence: 99%

Adaptive capacity of winegrape varieties cultivated in Greece to climate change: current trends and future projections

et al. 2020

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Aim: This research aimed to: (1) investigate the relationships between harvest dates and berry composition with air temperature during important periods during the growing season, across a range of indigenous and international winegrape varieties grown in wine regions over the majority of Greece; (2) calculate growing degree-days (GDD) from 1st of April until the harvest date of each variety and group the winegrape varieties according to their heat requirements; and (3) predict future harvest dates based upon these heat requirements under different representative emission pathways (i.e., RCP4.5 and RCP8.5) and future time periods (2041-2065 and 2071-2095) using an ensemble projection dataset.Methods and results: The analysis of heat requirements based on GDD from 1st of April to harvest date identified consistent maturity groups of the varieties studied, especially for indigenous Greek varieties. Trend analysis using the basic linear regression model showed that harvest dates have shifted earlier, during the last few decades, due to warmer conditions (especially during the ripening period) in most cases. In addition, trends in potential alcohol (acid) levels were found to be positively (negatively) correlated with maximum air temperatures in the majority of cases. Analysis of future projections using a global multi-climate model ensemble dataset (10 regional climate models) showed that harvest dates are projected to shift earlier up to 40 days in two future time periods (i.e., 2041-2065 and 2071-2095) depending on the variety and the emission pathway.Conclusions: Harvest dates of the early ripening varieties were associated more with the variations in maximum air temperatures during March to July, while mid- and late ripening varieties appeared to be affected more by maximum air temperatures during the ripening period. In addition, late ripening, mostly indigenous, varieties were less impacted by temperature increases compared to international varieties.Significance of the study: The indigenous Greek varieties appear better adapted to the recent and projected future climate of the region, responding less to warming as compared to international varieties in the majority of the study cases.

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Section: Discussionmentioning

confidence: 99%

Adaptive capacity of winegrape varieties cultivated in Greece to climate change: current trends and future projections

et al. 2020

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“…In Bordeaux, major grapevine varieties include Sauvignon blanc, Merlot, Cabernet franc and Cabernet-Sauvignon. Harvest dates can be modelled by using the Grapevine Sugar Ripeness model (GSR) to predict sugar ripeness [55]. According to this model, 200 g/L of grape sugar is attained when a daily mean temperature summation reaches a value F * (base temperature of 0 • C, start date day of the year 91, which is 1st of April in the Northern Hemisphere).…”

Section: Temperature Effectsmentioning

confidence: 99%

“…In the following example, the GSR model was used to predict the day when four major grapevine varieties grown in Bordeaux, i.e., Merlot, Cabernet-Sauvignon, Cabernet franc, and Sauvignon blanc, reach 200 g/L of sugar, with input temperature data from Bordeaux Mérignac weather station and F * values retrieved from [55] (Figure 3). To predict harvest dates, five days were added for Sauvignon blanc, which is picked around 210 g/L of grape sugar (12.5% potential alcohol).…”

Section: Temperature Effectsmentioning

confidence: 99%

An Update on the Impact of Climate Change in Viticulture and Potential Adaptations

Leeuwen

Destrac-Irvine

Dubernet³

et al. 2019

Agronomy

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Climate change will impose increasingly warm and dry conditions on vineyards. Wine quality and yield are strongly influenced by climatic conditions and depend on complex interactions between temperatures, water availability, plant material, and viticultural techniques. In established winegrowing regions, growers have optimized yield and quality by choosing plant material and viticultural techniques according to local climatic conditions, but as the climate changes, these will need to be adjusted. Adaptations to higher temperatures include changing plant material (e.g., rootstocks, cultivars and clones) and modifying viticultural techniques (e.g., changing trunk height, leaf area to fruit weight ratio, timing of pruning) such that harvest dates are maintained in the optimal period at the end of September or early October in the Northern Hemisphere. Vineyards can be made more resilient to drought by planting drought resistant plant material, modifying training systems (e.g., goblet bush vines, or trellised vineyards at wider row spacing), or selecting soils with greater soil water holding capacity. While most vineyards in Europe are currently dry-farmed, irrigation may also be an option to grow sustainable yields under increasingly dry conditions but consideration must be given to associated impacts on water resources and the environment.

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“…First, the plant material must be chosen according to local climate to guarantee full ripeness of the grapes at the end of the season (van Leeuwen and Seguin, 2006). Climatic indices, such as the heliothermal index (Huglin, 1978), or the Grapevine Sugar Ripeness model (Parker et al, 2020) can be used for this purpose. Second, the plant material should be chosen according to soil N availability to guarantee balanced N nutrition.…”

Section: Genetics and Agementioning

confidence: 99%

Understanding and managing nitrogen nutrition in grapevine: a review

et al. 2021

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This review addresses the role of nitrogen (N) in vine balance and grape composition. It offers an integrative approach to managing grapevine N nutrition. Keeping in mind that N excess is just as detrimental to wine quality as N depletion, the control of grapevine N status, and ultimately must N composition, is critical for high-quality grape production. N fertilisation has been intensively used in the past century, despite plants absorbing only 30 to 40 % of applied N. By adapting plant material, soil management and vine balance to environmental conditions, it would be possible for grape growers to improve plant N use efficiency and minimise N input in the vineyard. Vineyard N management is a complex exercise involving a search for a balance between controlling vigour, optimising grape composition, regulating production costs and limiting pollution. The first part of this review describes grapevine N metabolism from root N uptake to vine development and grape ripening, including the formation of grape aroma compounds. The advantages and limits of methods available for measuring plant N status are addressed. The second part focuses on the parameters that influence grapevine N metabolism, distinguishing the impacts of environmental factors from those of vineyard management practices. Areas for further research are also identified.

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Temperature-based grapevine sugar ripeness modelling for a wide range of Vitis vinifera L. cultivars

Cited by 65 publications

References 65 publications

Adaptive capacity of winegrape varieties cultivated in Greece to climate change: current trends and future projections

Adaptive capacity of winegrape varieties cultivated in Greece to climate change: current trends and future projections

An Update on the Impact of Climate Change in Viticulture and Potential Adaptations

Understanding and managing nitrogen nutrition in grapevine: a review

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