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Abstract
Devido à crescente importância de uvas finas para vinho no Estado de São Paulo foi feita a caracterização da fenologia, produtividade, curva de maturação e características químicas do mosto numa vinha de ‘Cabernet Sauvignon’ para diferentes épocas de poda na região de São Roque, SP. O delineamento experimental foi inteiramente casualizado com amostragem de trinta plantas e os valores médios das variáveis fitotécnicas e químicas do mosto foram comparados pelo teste ‘t’. As épocas de poda avaliadas foram 5/Ago; 6/Set; 22/Set e 19/Nov. A duração média do ciclo total da ‘Cabernet Sauvignon’ foi de 183 dias e a do período de maturação foi de 63 dias. A produtividade da ‘Cabernet Sauvignon’ diminuiu a partir da época de poda 5/8 (13,3 t.ha−1) até a de 19/11 (8,4 t.ha−1). O teor de sólidos solúveis (TSS) variou, para as diferentes épocas de poda, entre 18,7 e 19,9° Brix, enquanto os valores de acidez titulável total (ATT) ficaram entre os extremos de 96 e 111 meq.L−1. Foram desenvolvidas equações de estimativa do teor de sólidos solúveis e da acidez total em função de graus-dia acumulados a partir da data de floração. Os valores de produtividade, TSS e de ATT obtidos indicam ter a ‘Cabernet Sauvignon’ potencial para utilização pelos viticultores visando produção de vinhos de qualidade na região.
The increasing importance in producing fine grapes for wine purposes in the State of São Paulo (Brazil) induced the development of a field trial aiming to characterized phenology, yield, maturation curve and must chemical properties for the grapevine ‘Cabernet Sauvignon’ considering different pruning dates in the county of São Roque (São Paulo State, Brazil). The experimental design was completely randomized using a sample of thirty plants and the average values of agronomic parameters and must chemical variables were compared by the statistical ‘t’ test. The pruning dates evaluated were: Aug, 5th; Sept, 6th; Sept, 22nd and Nov, 19th. The average cycle length for the ‘Cabernet Sauvignon’ grapevine was 182 days while the ripening period lasted 63 days. The yield decreased from the pruning date Aug, 5th (13.3 t.ha−1) to Nov, 19th (8.4 t.ha−1). The total soluble solids (TSS) varied for the different pruning dates from 18.7 to 19.9° Brix, while the total titratable acidity (ATT) values varied from 96 to 111 meq.L−1. Equations were developed to estimate the TSS and ATT as a function of accumulated degree-days starting at the flowering date. According to the obtained values of yield, TSS and ATT it was verified the potential of ‘Cabernet Sauvignon’ for the growers aiming to produce better quality wines in the grape growing region of São Roque (São Paulo, Brazil).
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