Abstract
The aim of this research was to determine the physic-chemical and productive characteristics of ‘Cabernet Sauvignon’ and ‘Tannat’ grapes (Vitis vinifera) cultivated in the north of Paraná. The experimental area was established in a commercial vineyard owned by Intervin® Cellar, located in Maringá, state of Paraná. The vineyard was established in July, 2000, using the ‘IAC 766 Campinas’ as the rootstock. For each variety, 20 uniform grapevines were used, cultivated in pergola system in a 4.0 x 1.5 m spacing. The maturation of the grapes was evaluated considering the evolution of the following contents of the must overtime: pH, total soluble solids (TSS), titratable acidity (TA) and the TSS/TA ratio, from around 50 days after flowering up to 7 days after harvest. Considering the total cluster per tree, cluster mass and number of trees per hectare, the production per tree and productivity of each variety were estimated. The diameter and the mass of berries were also characterized. It was verified that ‘Tannat’ showed appropriate characteristics for grape processing. The behavior of ripening of both varieties was better fitted to the cubic regression. At harvest, it was determined that the pH, TSS content, TA, TSS/TA ratio, estimates of production per tree, productivity, cluster mass, number of cluster per tree, diameter and mass of berries of the ‘Cabernet Sauvignon’ and ‘Tannat’ grapes were 3.3 and 3.2; 14.1 and 17.2°Brix; 0.76 and 0.70% of tartaric acid, 18.7 and 29.6, 9.5 and 6.1 kg; 15.9 and 10.1 t ha-1; 0.12 and 0.16 kg; 78 and 36 clusters per tree; 12.0 and 12.9 mm, respectively.
Highlights
As uvas ‘Cabernet Sauvignon’ e ‘Tannat’ são de origem francesa, da região de Bordeaux e Madiran, respectivamente (Rizzon e Miele, 2002 e 2004)
The experimental area was established in a commercial vineyard owned by Intervin® Cellar, located in Maringá, state of Paraná
The vineyard was established in July, 2000, using the ‘IAC 766 Campinas’ as the rootstock
Summary
O experimento foi conduzido em vinhedos comerciais das uvas ‘Cabernet Sauvignon’ e ‘Tannat’ (Vitis vinifera) pertencente à Vinícola Intervin®, localizada em Maringá, Estado do Paraná. As características químicas das bagas das cultivares, como pH, teor de sólidos solúveis totais (SST), acidez titulável (AT) e o índice de maturação (SST/AT) do mosto foram avaliadas semanalmente, a partir dos 50 dias após o florescimento, aproximadamente, estendendo-se até 7 dias após a colheita, pela análise de 300 bagas (10 sub-amostras de 30 bagas cada) por métodos físico-químicos (Instituto Adolfo Lutz, 1985). As amostras foram trituradas para a retirada do mosto, e este foi em seguida filtrado com algodão para se determinar o teor de SST em refratômetro digital de bancada com compensação automática de temperatura (Krüss Optronic, Modelo DR 301-95, Alemanha), sendo o resultado expresso em °Brix. A determinação da AT foi realizada por titulação do mosto com solução padronizada de NaOH 0,1N em titulador potenciométrico digital (Schott Geräte, Modelo Tritoline Easy, Alemanha), com ponto final de titulação ajustado para pH = 8,2, e o resultado expresso em porcentagem de ácido tartárico. O momento da colheita de cada cultivar foi definido quando verificou-se que a partir daquela fase os cachos não poderiam ser mantidos nas plantas em virtude do início da ocorrência de abelhas e de doenças fúngicas nos mesmos
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