Vineyard age. II. Influence on grape and wine quality | Age de la vigne. II. Influence sur la qualité des raisins et des vins
2008
Zufferey, V. | Maigre, D., Station de recherche Agroscope Changins-Waedenswil ACW, Nyon (Switzerland)
A comparison of old and young vine plants, with respect to their viticultural and oenological properties, was made between 2002 and 2006 at the experimental estate of Leytron (Wallis, Switzerland), in a trial study set up by the Research Station Agroscope Changins-Wädenswil ACW. Six rootstocks were included in the study: Chasselas, Pinot blanc, Arvine, Gamay, Syrah and Humagne rouge. Grape sugar content was found to be equivalent irrespective of vine plant age. Both total must acidity and values of the formol index were greater in old vine plants. Generally speaking, old vine plants of red wine rootstocks produced better noted wines than young ones, particularly in relation to tannin quality, judged to be fuller and more firm, and to their better structure. At tasting, white wines didn't show much difference between those issued from old and young vines. After several years in bottle, wines produced from old grapevines were slightly preferred to those of young vines, for both red or white wine root stocks.
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