Composi??o físico-química de uvas para vinho fino em ciclos de ver?o e inverno

摘要

This work aimed to evaluate some ripening parameters of cultivars Pinot Noir, Tempranillo, Merlot, Cabernet Sauvignon, Syrah, Chardonnay and Sauvignon Blanc submitted to the double-pruning management in Cordislandia, in the coffee region of the south of Minas Gerais State. Grapevines were cultivated in two different growing seasons, spring-summer from August to January and autumn-winter from January to July. Quality parameters such as berry transversal and longitudinal diameters, acidity, tartaric and malic acids, pH, soluble solids, anthocyanins, phenolic compounds, glucose, fructose and sucrose were evaluated. All cultivars showed higher pH, soluble solids, sugars, anthocyanins and phenolic compounds levels and lower transversal and longitudinal diameters in winter cycle. Syrah cultivar pointed out with higher anthocyanin and phenolic compounds levels in summer and winter cycles however showed lower reducing sugars levels in must. The alteration of the production cycle through double-pruning management in order to harvest grapes in the winter in the coffee region of Minas Gerais favours the ripening of the fruits and improves the quality of wine grapes.