Tempos diferentes de maceração pelicular com uvas Cabernet Sauvignon da Campanha Gaúcha, Rio Grande do Sul

Abstract

The objective of the present investigation was to evaluate the phenolic potential of wine made with the Cabernet Sauvignon, cultivated in the vineyard of the municipality of Dom Pedrito, Campanha Gaúcha, from different times of pelicular maceration, 5 days, 7 days, 15 days and 30 days. The grapes were harvested on March 3, 2018, with a concentration of 19,4 brix, pH of 3,4 and total acidity, in tartaric acid, of 3,5 g.L-1, divided into 4 treatments, each with 3 repetitions. Microvinifications were carried out, and for each one, 13 kilos of grapes were used. Treatment 1 had 5 days of film maceration, treatment 2 had 7 days, treatment 3 with 15 days and treatment 4 with 30. analysis of total anthocyanins, intensity and color tone, and total tannins in equipment Spectrophotometer through absorbance measurements using 420, 520, 550 and 620 nanometers. For the results we used the analysis of variance (ANOVA) and the comparison of means made through the Turkey test, at 5% probability. For the T2 with 7 days maceration the amount of total deanthocyanins (average of 222,32 mg/L) was greater than the amounts of T3 and T4 (15-day maceration), average of 180,41 mg/L and average 30 day maceration of 156.61 mg/L, respectively, for the treatment 1 maceration of 5 days (average of 192,80 mg/L) the result was close to T2 as for T3 and T4. Regarding total tannins, T4 presented a higher result than the other treatments (1,39g/L), T2 (0,93 g/L) and T3 (1,01 g/L) had averages similar to T4 and with T1, the latter had the lowest amount (0,63g/L), being lower than the others. The color intensity is statistically the same for all the treatments and the color tonality, for T1 and T2 are equal to average of 0,82% and 0,94%, but lower than treatments 3 and 4, which in turn are equal, with greater intensity of color, 1,11% and 1,13% respectively. The macaroni of 5 days (T1) and 7 days (T2) present similarity in the amounts of extracted compounds, as well as periods of 15 days (T3) and 30 days (T4) are also similar.