01704naa a2200325 a 450000100080000000500110000800800410001902200140006002400330007410000180010724501040012526000090022950000910023852007540032965000120108365000070109565000220110265000120112465000110113665000190114765300220116665300140118870000160120270000160121870000150123470000190124970000140126870000160128277300800129810503672019-11-04       2012    bl uuuu     u00u1 u    #d  a0002-92547 a10.5344/ajev.2012.111072DOI1 aCONIBERTI, A.  aRole of canopy management in controlling high pH in Tannat grapes and wines.h[electronic resource]  c2012  aArticle history: Manuscript submitted Oct 2011 / Revised Jun 2012 / Accepted Jul 2012.  aABSTRACT.  Elevated wine pH is one of the main problems affecting the quality of Vitis vinifera L. Tannat wines in Uruguay. High soil fertility, promoting vigorous vines, and 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 on the reduction of 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. All rights reserved.  aFOLLAJE  aPH  aPLANTAS DE SOMBRA  aPOTASIO  aTANNAT  aVITIS VINIFERA  aCanopy management  aPotassium1 aFERRARI, V.1 aFARIÑA, L.1 aCARRAU, F.1 aDELLACASSA, E.1 aBOIDO, E.1 aDISEGNA, E.  tAmerican Journal of Enology and Viticulture, 2012, vol.63, no.4, p.554-558.