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Effect of bunch thinning and water stress on chemical and sensory characteristics of tempranillo wines

AuthorsGamero, Esther; Moreno, Daniel; Vilanova de la Torre, María del Mar ; Uriarte, David; Prieto, M. H.; Valdés, E.
KeywordsSensory analysis
Wine composition
Yield management
Issue DateJul-2014
PublisherJohn Wiley & Sons
CitationAustralian Journal of Grape and Wine Research 20 (3): 394- 400 (2014)
AbstractBackground and Aims: The influence of water status and bunch thinning on the chemical and sensory properties of Vitis vinifera L. cv. Tempranillo wines was studied. Tempranillo vines from Extremadura (Spain) were subjected to two irrigation treatments (100 and 25% of evapotranspiration) and two bunch-thinning treatments (7-9 and 4-5bunches/m2 of planting area), applied at veraison.
Methods and Results: Both thinning and deficit irrigation significantly affected must and wine chemical composition and wine sensory properties. Deficit irrigation increased floral and fruity aromas and reduced herbaceous aromas. The combination of deficit irrigation with bunch thinning improved the sensory characteristics of wines, showing improved colour intensity, persistence and balance. Partial least squares regression showed a correlation among the sensory attributes and chemical composition of Tempranillo wines from different treatments of irrigation and bunch thinning. The sensory attributes, cherry colour, colour intensity, balance and structure, were strongly predicted by anthocyanins, colour intensity and ethanol.
Conclusions: Deficit irrigation and bunch thinning at veraison improved the sensory characteristics of Tempranillo wines. Improvements due to bunch thinning were independent of those due to irrigation.
Significance of the Study: Deficit irrigation and bunch thinning at veraison can improve grape composition and wine sensory characteristics in Tempranillo wine. Any improvements, however, must be balanced against a lower yield and the increased management costs of bunch thinning.
Publisher version (URL)http://dx.doi.org/10.1111/ajgw.12088
Identifiersdoi: 10.1111/ajgw.12088
issn: 1322-7130
e-issn: 1755-0238
Appears in Collections:(MBG) Artículos
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