Soil and climate zoning determining grapevine resource yield-gaps in Languedoc-Roussillon vineyards - Archive ouverte HAL Access content directly
Conference Poster Year : 2022

Soil and climate zoning determining grapevine resource yield-gaps in Languedoc-Roussillon vineyards

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Renan Le Roux
Christian Gary

Abstract

Grapevine yield has been historically overlooked, assuming a strong trade-off between grape yield and wine quality. At present, menaced by climate change, many vineyards in Southern France are far from the quality label threshold, becoming grapevine yield-gaps a major subject of concern. Although yieldgaps are well studied in arable crops, we know very little about grapevine yield-gaps. In the present study, we analysed the environmental component of grapevine yield-gaps linked to climate and soil resources in the Languedoc Roussillon. We used SAFRAN data and IGP Pays d’Oc wine yields from 2010 to 2018. We selected climate and soil indicators proving to have a significant effect on average wine yield-gaps at the municipality scale. The most significant factors of grapevine yield were the Soil Available Water Capacity; followed by the Huglin Index and the Climatic Dryness Index. The Days of Frost; the Soil pH; and the Very Hot Days were also significant. Then, we clustered geographical zones presenting similar indicators, facilitating the identification of resources yield-gaps. We discussed the number of zones with the experts of IGP Pays d'Oc label, obtaining 7 zones with similar limitations for grapevine yield. Finally, we analysed the main resources causing yield-gaps and the grapevine varieties planted on each zone. Mapping grapevine resource yield-gaps are the first stage for understanding grapevine yield-gaps at the regional scale.
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Dates and versions

hal-03869137 , version 1 (24-11-2022)

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  • HAL Id : hal-03869137 , version 1

Cite

Hugo Fernandez-Mena, Nicolas Guilpart, Philippe Lagacherie, Renan Le Roux, Mayeul Plaige, et al.. Soil and climate zoning determining grapevine resource yield-gaps in Languedoc-Roussillon vineyards. Montpellier Vine & WIne sciences - International seminar: Sharing knowledge & designing research programs to address key challenges of the vine-wine sector, Oct 2022, Montpellier (FR), France. , pp.39-39, 2022, Seminar proceedings of Montpellier Vine & WIne sciences - International seminar: Sharing knowledge & designing research programs to address key challenges of the vine-wine sector. ⟨hal-03869137⟩
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