The Influence of Ecoclimatic Conditions on Wood Maturation and Bud's Viability, at Some Grape Varieties for Quality Wine, from Vineyard Târnave

Abstract

During vine's repose period, temperature is the mai n stress factor, which influences plant growth and development, as well as the level and quality of next year's yield. In this paper, we re made observations regarding temperatures during the year 2009 and the level of critic temperature during the winter of 2009-2010, in order to establi sh the quantity of carbohydrates from vine shoots and bud viability for several grape varieties: Musc at Ottonel, Sauvignon blanc, Traminer roz and Neuburger. The critic period for vine was in Januar y, due to 7 consecutive days of frost. Carbohydrates content in vine shoots oscillated bet ween 12.09 g% (Neuburger) and 13.25 g% (Muscat Ottonel). Best viability for bearing buds was regis ter for Muscat Ottonel variety 59.56% and the lowest one for Neuburger variety 25.90%. At Neuburger variety, the highest percentage of viable buds is found in the upper third (37.29% main buds and 5 0% secondary buds).