Abstract
Elevated wine pH is one of the main problems affecting Tannat's wine quality in Uruguay. High soil fertility, promoting vigorous vines, as well as high potassium availability result in high pH grapes and wine. The main objective of this work was to determine the effects of partial leaf and lateral shoot removal practices to reduce juice and wine pH over three growing seasons. Partial defoliation in shaded canopies significantly reduced grape potassium accumulation, malic to tartaric acid ratio and wine pH, without negatively affecting other quality parameters of soluble solids, organic acids, anthocyanins and phenolics.
- ©2012 by the American Society for Enology and Viticulture
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