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Effect of the harvest season on phenolic composition and oenological parameters of grapes and wines cv. Touriga Nacional (Vitis vinifera L.) produced under tropical semi-arid climate, in the state of Pernambuco, Brazil
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Orientador(es)
Resumo(s)
The northeastern region of São Francisco Valley is the third largest wine producer in Brazil, differentiated by the production of at least two harvests per
year, generally in the first and second semesters, respectively. The productive cycle of the vine in the first semester is higher than in the second semester,
mainly due to differences in temperature, with maximum and average temperatures of approximately 30 ºC and 26 ºC, respectively. Second semester is
characterized by higher temperatures (summer season) and that promote a rapid maturation of the grapes. The objective of this work was to evaluate the
phenolic composition, other oenological parameters and the sensorial profile of grapes and wines of cv. 'Touriga Nacional' (Vitis vinifera L.), characterizing
grapes and wines from four harvest seasons, two of them referring to the first half of the year and two referring to the second half of the year, using a broad
analytical approach. The experimental design consisted of three randomized blocks, with sixty plants marked in different lines and positions (twenty plants
in each block at the beginning, middle and end of the vineyard). The results showed that there was a harvesting effect for some of the grape chemical
compounds (monomeric anthocyanins, organic acids, condensed tannins and monomeric flavanols, for example) as well as in wines (calcium, monomeric
anthocyanins, condensed tannins and monomeric flavanols). Regarding the sensorial profile of the wines, it was possible to observe that higher scores were
attributed to floral aroma in wines from the first harvest (first half of the year). Fruity, spice and empyreumatic aromas were higher in wines from second
harvest season (second half of the year). For other attributes, there was a tendency for higher variations between the period of study (2014 – 2017) than
between the harvest seasons
Descrição
Palavras-chave
phenolic compounds red wines sensory profile Touriga nacional tropical semi-arid grape
Contexto Educativo
Citação
Ciência Téc. Vitiv. 33(2) 145-166. 2018
Editora
INIAV