Irrigation effects on the sensory perception of wines from three white grapevine cultivars traditional from Galicia (Albariño, Godello and Treixadura)

Abstract

SUMMARYThis study aimed to assess the effect of irrigation on the sensory profile of wines from three Galician white grapevine cultivars. Field experiments were carried out in 2011 and 2012 at the research farm of the Estación de Viticultura e Enoloxía de Galicia (EVEGA), where two treatments were imposed: rain-fed and irrigation to the 50% of potential evapotranspiration. A panel of seven judges tasted the wines in six sessions (one per cultivar and year) for evaluating their sensory profile. In the case of 'Albariño', three descriptors, although not the same for both years, were significantly different between treatments. For 'Godello', several descriptors differed between treatments, and citric was present in both years. In 'Treixadura' white fruit and persistence were present in 2011 and 2012. Several descriptors contributed to the hedonic index, but differed between wines; however, balance was common for all the cultivars and years. In conclusion, 'Albariño' and 'Godello' wines from the rain-fed treatment received higher marks than those from the irrigation treatment; whereas Treixadura wines from the irrigation treatment were better valued. RESUMOEste estudo teve como objetivo avaliar o efeito da rega no perfil sensorial de vinhos procedentes de três castas brancas galegas. As experiências de campo foram realizadas em 2011 e 2012, na quinta da Estación de Viticultura e Enoloxía de Galicia (EVEGA), onde dois tratamentos foram estudados: sem rega e rega a 50% da evapotranspiração potencial. Uma câmara de sete provadores avaliou os vinhos em seis sessões (uma por variedade e ano) para determinar o seu perfil sensorial. No caso da cultivar 'Albariño', três descritores, embora não sendo os mesmos para ambos os anos, foram significativamente diferentes entre tratamentos. Relativamente à cultivar 'Godello', vários descritores diferiram entre tratamentos, estando o cítrico presente nos dois anos. No caso da cultivar 'Treixadura', a fruta branca e a persistência estiveram presentes em 2011 e 2012. Vários descritores contribuíram para o índice hedónico, mas diferentes entre vinhos; porém, o equilíbrio foi comum para todas as cultivares e anos. Em conclusão, os vinhos das cultivares 'Albariño' e 'Godello' procedentes do tratamento sem rega receberam pontuações mais elevadas que os procedentes do tratamento de rega; pelo contrário, os vinhos de 'Treixadura' procedentes de tratamentos com rega foram mais valorizados.

Peculiarities of the Organic Wine in Galicia (NW Spain): Sensory Evaluation and Future Considerations

“…However, the separation or grouping by DO of the samples did not show a total differentiation of the wines analyzed by region. These results would indicate that other parameters, such as aromas by the microbiology present in fermentation or winemaking techniques, farming system, year, etc., should be considered to evaluate this distinction between wines as reported by other authors [25][26][27]. Furthermore, the higher clustering of the samples in the PCA indicates a greater homogeneity of the white wines compared to the red ones in terms of chemical composition.…”

Effects of Vineyard Management Practices on Winegrape Yield Components. A Review Using Meta-analysis

“…composition (Matthews and Anderson 1988, Chaves et al 2007, Oliveira and Nieddu 2013, Trigo-Córdoba et al 2014. In many grapegrowing regions, irrigation is used to modulate production and fruit composition.…”

Influence of non-irrigation and seasonality on wine colour, phenolic composition and sensory quality of a grapevine (<i>Vitis vinifera</i> cv. Callet) in a Mediterranean climate

“…Accordingly, water deficit has been reported to increase the concentration of C13-norisoprenoids and terpenes (Song et al, 2012) by modulating structural and regulatory genes involved in the biosynthesis of volatile compounds (Deluc et al, 2009). However, a lower water supply does not always have a positive effect on the sensory properties of wines (Trigo-Córdoba et al, 2014). Therefore, regulated deficit irrigation (RDI) may be a better strategy to improve wine quality than either full irrigation or no irrigation treatments.…”