Influence of irrigation on grapevine behaviour and on wine quality of white grape varieties in central Valais | Irrigation: comportement de la vigne et qualité des vins de cépages dans le Valais central
2011
Spring, J.-L. | Zufferey, V., Agroscope Changins-Waedenswil (ACW), Conthey (Switzerland). Centre de recherche Conthey
Several irrigation treatments were conducted in Leytron (central Valais) on an homogeneous plantation of white grape cultivars Chasselas, Sylvaner et Arvine. Moderated water restriction led to a better accumulation of residual sugars in the berries. However, a strong and consistent water stress led to a decrease in the gaseous exchanges as well as to lower concentrations of residual sugars in the must. Malic acid and potassium rates in the must were lower when grapevines were not irrigated, while tartaric acid in the wine rate was higher under the same conditions. Sylvaner and Arvine wines had less bouquet and were bitterer when cultivars suffered without irrigation from a strong water restriction, but also sometimes from moderated water restriction.
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Este registro bibliográfico ha sido proporcionado por Agroscope Reckenholz-Tänikon Research Station