Original research articles

Effects of artificial soil covers on the internal temperatures of grape berries during the grape maturation

Abstract

Air temperature as well as internal and surface temperatures (by infrared radiothermometry) of grape berries of vineyards (var. Syrah) under which we place different soil cover : bare soil, polyethylene and aluminium were monitored during the swelling and the ripening stages at the « Institut National de la Recherche Agronomique » experimental station at Pech Rouge, Gruissan (France). Results showed there were significant differences in the thermal responses of the grapes with respect to the type of soil cover and degree of fruit ripening. High differences in temperatures between grape and air were observed in soil covered with aluminium sheet which reflected most of the incident solar radiation. For this cover, biochemical analysis of berries and must indicate an increase of sugars grade and alcoholic degree. Statistical analysis were carried out to determine the influence of climatic variables on the grape temperatures. Solar radiation, wind and air temperature are the parameters which seem the main factors, nevertheless, their influence evolve during the process of grape maturation.

Authors


Olivier Igounet

Affiliation : ULP, Centre d'études et de Recherches Eco-Géographiques, URA9S CNRS, 67083 Strasbourg (France)


Charles Baldy

Affiliation : INRA, Laboratoire d'Étude des Plantes sous Stress Environnementaux, 34060 Montpellier (France)


Jean-Pierre Robin

Affiliation : Unité de Recherche sur les Produits de la Vigne, ENSAM-INRA, 2 place Viala, 34060 Montpellier, France

robin@ensam.inra.fr

Jean-Claude Boulet

Affiliation : INRA Unité Expérimentale d’OEnologie de Pech-Rouge 11430 Gruissan, France


M. Sanon

Affiliation : INERA, Station de Di, 03 BP 7192, Ouagadougou 03 (Burkina Faso)


Benoît Suard

Affiliation : INRA, Laboratoire d'Étude des Plantes sous Stress Environnementaux, 34060 Montpellier (France)

Attachments

No supporting information for this article

Article statistics

Views: 193

Downloads

PDF: 36

Citations

PlumX