Vitis vinifera Gewürztraminer (white variety) and Cabemet Sauvignon (red) growned in Santana do Livramento, RS, and Garibaldi, RS, were added with different nitrogen treatments in the vineyard during me 1992-1993 season. After harvest and crushing, the musts were divided into four lots each one added with a different yeast. The volatiles were analyzed through GC. Maximum amount of methanol was found with the red variety (225.6mg/l). Increasing nitrogen in the soil increased (mg/l) propanol-1 (min. 25-max. 78.2) and decreased methyl-2 propanol-1 (min. 60.8-max. 125.9) and methyl-3+methyl-2 butanol-1 (min. 85.8-max. 407.8). The fusel alcohol fraction showed, also, differences between region,grape variety and yeast used.
wines; fusel alcohols; vineyard; nitrogen
