Issue |
E3S Web Conf.
Volume 50, 2018
XII Congreso Internacional Terroir
|
|
---|---|---|
Article Number | 01002 | |
Number of page(s) | 6 | |
Section | Componentes de los Terroir | |
DOI | https://doi.org/10.1051/e3sconf/20185001002 | |
Published online | 22 August 2018 |
Variación del clima de un Terroir y su consecuencia sobre la respuesta de la vid
Variation of the climate of a Terroir and its consequence on the vine’s response
Departamento de Producción Vegetal, Facultad de Agronomía,
Av. Garzón 780 Montevideo, Uruguay
El clima vitícola, un componente mayor del Terroir, fue identificado en la región sur del Uruguay: sequía moderada, templado cálido, noches templadas, sometido a la influencia de la brisa marina. En el período 1994-2016, se analizó el régimen térmico e hídrico y su influencia sobre el rendimiento, sanidad y composición de la uva, de viñedos comerciales de Tannat. ACP mostró 3 grupos de años: Grupo 1 (húmedo), precipitaciones del ciclo del cultivo superiores a la media, sanidad limitante, acidez y rendimiento mayores a la media y azúcares inferiores, cosechas tardías. Grupo 2 (cálido y seco), condiciones térmicas superiores al promedio y la componente hídrica por debajo, sanidad superior a la media, azúcares y acidez inferiores, cosechas adelantadas. Grupo 3 (fresco, húmedo en primavera y seco en maduración), condiciones térmicas inferiores a la media, precipitaciones superiores a la media en brotación –cuajado e inferiores en el mes previo a cosecha, superiores a la media azúcares y tamaño de baya, cosecha atrasada. Se establecieron correlaciones entre las variables del clima, rendimiento y la calidad de la uva. En la serie de años estudiada, la variabilidad climática de la región fue muy marcada y la respuesta de Tannat acompañó dicha variabilidad.
Abstract
Viticultural climate, a major component of Terroir, in Uruguay southern region was classified as moderately dry, temperate-warm, with temperate nights and influenced by sea breeze. During the 1994-2016 period, thermal and water regimes and their influence on grapevine yield, sanitary status and berry composition was analyzed for Tannat cultivar grown in commercial vineyards. Principal component analysis (PCA) separated years in three groups: Group 1 (wet), rainfall over the growing season higher than the average, sanitary status is limiting, acidity and yield higher than the average, whereas sugar content is lower, late harvest. Group 2 (warm and dry), thermal conditions greater and water component lower than the average, better sanitary status, sugar contents and acidity lower than the average, early harvest. Group 3 (fresh, wet in spring and dry during ripening), thermal conditions lower than the average, rainfall higher during budbreak-fruitset and lower than the average in the month previous to harvest, berry size and sugar contents greater than the average, late ripening. Correlations among climate, yield and berry quality variables were established. In the studied years, climate variability within the region was high and the response of the Tannat cultivar was in accordance to this variability.
Palabras claves : Palabras clave / Variabilidad climática / rendimiento / sanidad / composición de la uva / Tannat
Key words: climate variability / yield / sanitary status / berry composition / Tannat
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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