Effect of Three Rootstocks on Grapevine (Vitis vinifera L.) cv. Negrette, Grown Hydroponically. II. Acidity of Musts and Wines

  • M. Garcia Ecole Nationale Superieure Agronomique de Toulouse, Centre de Viticulture et d'Oenologie de Midi Pyrenees, Avenue de l' Agrobiopole-Auzeville-Tolosane. B.P.107 F-31326 Castanet-Tolosan Cedex-France
  • H. Ibrahim Ecole Nationale Superieure Agronomique de Toulouse, Centre de Viticulture et d'Oenologie de Midi Pyrenees, Avenue de l' Agrobiopole-Auzeville-Tolosane. B.P.107 F-31326 Castanet-Tolosan Cedex-France
  • P. Gallego Ecole Nationale Superieure Agronomique de Toulouse, Centre de Viticulture et d'Oenologie de Midi Pyrenees, Avenue de l' Agrobiopole-Auzeville-Tolosane. B.P.107 F-31326 Castanet-Tolosan Cedex-France
  • P.H. Puig Ecole Nationale Superieure Agronomique de Toulouse, Centre de Viticulture et d'Oenologie de Midi Pyrenees, Avenue de l' Agrobiopole-Auzeville-Tolosane. B.P.107 F-31326 Castanet-Tolosan Cedex-France

Abstract

The cultivar was found to have high potassium content in leaves, musts and wines. To study the contribution of rootstock to this problem, Negrette was grafted onto 101-14 Mgt, 3309 C and SO 4 and grown in the same nutrient solution.  The Negrette/3309 combination produced wines with the highest total acidity and tartaric acid content. This graft combination seems to be the best suited to increase the acidity of the must and wine of Negrette.

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