Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime
The authors present the results of an experimentation realized on Chiraz grapes with the aims to study the thermal regime supported by berries and clusters during their maturation and to determine the main factors responsible for the observed modifications. The results show that two important factor...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
International Viticulture and Enology Society
1995-12-01
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| Series: | OENO One |
| Subjects: | |
| Online Access: | https://oeno-one.eu/article/view/1120 |
| _version_ | 1819182000072818688 |
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| author | Olivier Igounet Charles Baldy Benoît Suard François-Xavier Sauvage François López Jean-Claude Boulet Jean-Pierre Robin |
| author_facet | Olivier Igounet Charles Baldy Benoît Suard François-Xavier Sauvage François López Jean-Claude Boulet Jean-Pierre Robin |
| author_sort | Olivier Igounet |
| collection | DOAJ |
| description | The authors present the results of an experimentation realized on Chiraz grapes with the aims to study the thermal regime supported by berries and clusters during their maturation and to determine the main factors responsible for the observed modifications. The results show that two important factors explain these modifications, firstly, the albedo of the berries which is strongly decreasing as a consequence of the light absorption and subsequent coloration of the berries during the veraison phase and secondly, the increase of the cluster compactness. Two thermic parameters allowing the characterization of the thermal regime of the Chiraz grapes have been defined:
- the thermal sensibility of the clusters towards the wind velocity directly depending on the compactness or aeration degrees of the grapes,
and
- the maximum capacity to accumulate heat which is also linked to cluster compactness but essentially depending on the berries coloration.
The effect of the compactness or aeration degree of the grape on the thermal regime in relation with the local wind regime has also been described. In practice, it would have been better to take attention to any cultural intervention modifying the wind regime around the vine stocks or surrounding the parcel. A photographic method for estimating the compactness degree of the grape clusters on the vine stock has been used. |
| first_indexed | 2024-12-22T22:39:10Z |
| format | Article |
| id | doaj.art-3de68a309d544e24a3ad0a568a62a582 |
| institution | Directory Open Access Journal |
| issn | 2494-1271 |
| language | English |
| last_indexed | 2024-12-22T22:39:10Z |
| publishDate | 1995-12-01 |
| publisher | International Viticulture and Enology Society |
| record_format | Article |
| series | OENO One |
| spelling | doaj.art-3de68a309d544e24a3ad0a568a62a5822022-12-21T18:10:14ZengInternational Viticulture and Enology SocietyOENO One2494-12711995-12-0129419320410.20870/oeno-one.1995.29.4.11201120Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regimeOlivier Igounet0Charles Baldy1Benoît Suard2François-Xavier Sauvage3François López4Jean-Claude Boulet5Jean-Pierre Robin6ULP, Centre d'études et de Recherches Eco-Géographiques, URA9S CNRS, 67083 Strasbourg (France)INRA, Laboratoire d'Étude des Plantes sous Stress Environnementaux, 34060 Montpellier (France)INRA, Laboratoire d'Étude des Plantes sous Stress Environnementaux, 34060 Montpellier (France)Unité de Recherche sur les Produits de la Vigne, ENSAM-INRA, 2 place Viala, 34060 Montpellier, FranceChaire de Viticulture et d'OEnologie, AGRO Montpellier, 2 place P. Viala, 34060 Montpellier cedex, FranceINRA Unité Expérimentale d’OEnologie de Pech-Rouge 11430 Gruissan, FranceUnité de Recherche sur les Produits de la Vigne, ENSAM-INRA, 2 place Viala, 34060 Montpellier, FranceThe authors present the results of an experimentation realized on Chiraz grapes with the aims to study the thermal regime supported by berries and clusters during their maturation and to determine the main factors responsible for the observed modifications. The results show that two important factors explain these modifications, firstly, the albedo of the berries which is strongly decreasing as a consequence of the light absorption and subsequent coloration of the berries during the veraison phase and secondly, the increase of the cluster compactness. Two thermic parameters allowing the characterization of the thermal regime of the Chiraz grapes have been defined: - the thermal sensibility of the clusters towards the wind velocity directly depending on the compactness or aeration degrees of the grapes, and - the maximum capacity to accumulate heat which is also linked to cluster compactness but essentially depending on the berries coloration. The effect of the compactness or aeration degree of the grape on the thermal regime in relation with the local wind regime has also been described. In practice, it would have been better to take attention to any cultural intervention modifying the wind regime around the vine stocks or surrounding the parcel. A photographic method for estimating the compactness degree of the grape clusters on the vine stock has been used.https://oeno-one.eu/article/view/1120Vitis viniferatemperaturemicroclimatewind regimematurationalbedoberry colorationgrape compactness |
| spellingShingle | Olivier Igounet Charles Baldy Benoît Suard François-Xavier Sauvage François López Jean-Claude Boulet Jean-Pierre Robin Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime OENO One Vitis vinifera temperature microclimate wind regime maturation albedo berry coloration grape compactness |
| title | Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime |
| title_full | Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime |
| title_fullStr | Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime |
| title_full_unstemmed | Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime |
| title_short | Thermal regime of the grape (<em>Vitis vinifera</em> L. Syrah grapes) during maturation. Influence of the berry coloration, the compactness degree of the grape and the local wind regime |
| title_sort | thermal regime of the grape em vitis vinifera em l syrah grapes during maturation influence of the berry coloration the compactness degree of the grape and the local wind regime |
| topic | Vitis vinifera temperature microclimate wind regime maturation albedo berry coloration grape compactness |
| url | https://oeno-one.eu/article/view/1120 |
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