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Cet essai concerne les effets de la suppression continue, apres la nouaison, des entre-coeurs de souches de vigne sur le microclimat lumineux et la recolte.II apparait que l'amputation de la part importante de surface foliaire representee par les entre-coeurs (1/4 a 1/2) est compensee par une meilleure exposition du feuillage conserve.La production et la richesse en sucres des raisins ne sont pas influencees par le traitement alors que l'acidite totale semble plutot diminuee.En definitive, le facteur determinant du potentiel de production de la vigne, notamment du taux de sucres des raisins est moins la surface totale du feuillage que la « surface foliaire exposee ».+++The purpose of this trial was to measure the effects of a continuous lateral shoots removing, after berry set, on grapevine microlimate and crop.It was found that suppression of the lateral shoots which represent an important part of the leaf area (1/4 to 1/2) is balanced by a better exposure of the remaining foliage.Yield and sugar content of the grapes were not affected by the handling whereas the total acidity seemed to be decreased.Finally, it is less the total leaf area than the « exposed leaf area » which fixes the potentialities of grapevines especially the sugar content of the grapes.

Influence de la suppression des entre-coeurs de souches de vigne sur le microclimat lumineux et la récolte