Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat
The effect of the different treatments on the production of grape and wood, and the characteristics of the wines produced in a vineyard of Tannat variety, situated in the south region of Uruguay, were studied during 4 years (1997-2000). The experimental design was in parcels at random, with 30 plants per treatment. The plants wereconducted in high trellis, with double Guyot pruning. The treatments were 6: manual cluster thinning at 50% in setting or veraison, chemical cluster thinning (Etephon applications) at the same moments, and pruning at 4 and 6 bud for rod, being this last one considered as witness. 80 kilos of red grape per treatment were wine-made, with identical conditions of elaboration for all the cases. A month after the alcoholic fermentation was finished, the wines were analysed and the oenological classic parameters, the phenolic composition and the colour were determined. There were significant differences in the behaviour of the different treatments in the different years. There were statistical differences between the treatments for all the parameters considered in each year. The highest contents of alcohol in the wines were obtained with the chemical cluster thinning in settings and with the cluster thinning in veraison. However, the highest contents of total polyphenols, anthocyanins, flavanols and proanthocyanidins, and therefore the higher colour intensities of the wines, were obtained with the application of Etephon in veraison. This treatment had no effect of cluster thinning itself, so it did not have any incidence on the production, which was similar to the witness for all the years. The other treatments determined a significant decrease of the production with regard to the 6-bud pruning.
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Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA)
2002
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| Online Access: | https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1357 |
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Ferrer, M. González Neves, G. |
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Ferrer, M. González Neves, G. Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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Ferrer, M. González Neves, G. |
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Ferrer, M. |
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Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat |
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oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in vitis vinifera l. cv tannat |
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The effect of the different treatments on the production of grape and wood, and the characteristics of the wines produced in a vineyard of Tannat variety, situated in the south region of Uruguay, were studied during 4 years (1997-2000). The experimental design was in parcels at random, with 30 plants per treatment. The plants wereconducted in high trellis, with double Guyot pruning. The treatments were 6: manual cluster thinning at 50% in setting or veraison, chemical cluster thinning (Etephon applications) at the same moments, and pruning at 4 and 6 bud for rod, being this last one considered as witness. 80 kilos of red grape per treatment were wine-made, with identical conditions of elaboration for all the cases. A month after the alcoholic fermentation was finished, the wines were analysed and the oenological classic parameters, the phenolic composition and the colour were determined. There were significant differences in the behaviour of the different treatments in the different years. There were statistical differences between the treatments for all the parameters considered in each year. The highest contents of alcohol in the wines were obtained with the chemical cluster thinning in settings and with the cluster thinning in veraison. However, the highest contents of total polyphenols, anthocyanins, flavanols and proanthocyanidins, and therefore the higher colour intensities of the wines, were obtained with the application of Etephon in veraison. This treatment had no effect of cluster thinning itself, so it did not have any incidence on the production, which was similar to the witness for all the years. The other treatments determined a significant decrease of the production with regard to the 6-bud pruning. |
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Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) |
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2002 |
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https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1357 |
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oai:oai.agrocienciauruguay.uy:article-13572024-02-05T13:58:26Z Oenological and productive results of the application of different cluster thinning alternatives and different wintry pruning intensities in Vitis vinifera L. cv Tannat Resultados enológicos y productivos de la aplicación de diversas alternativas de raleo de racimos y distintas intensidades de poda invernal en Vitis vinifera L. cv. Tannat Ferrer, M. González Neves, G. Tannat Cluster thinning Etephon Red Wines Tannat Raleo de racimos Etefón Vinos tintos The effect of the different treatments on the production of grape and wood, and the characteristics of the wines produced in a vineyard of Tannat variety, situated in the south region of Uruguay, were studied during 4 years (1997-2000). The experimental design was in parcels at random, with 30 plants per treatment. The plants wereconducted in high trellis, with double Guyot pruning. The treatments were 6: manual cluster thinning at 50% in setting or veraison, chemical cluster thinning (Etephon applications) at the same moments, and pruning at 4 and 6 bud for rod, being this last one considered as witness. 80 kilos of red grape per treatment were wine-made, with identical conditions of elaboration for all the cases. A month after the alcoholic fermentation was finished, the wines were analysed and the oenological classic parameters, the phenolic composition and the colour were determined. There were significant differences in the behaviour of the different treatments in the different years. There were statistical differences between the treatments for all the parameters considered in each year. The highest contents of alcohol in the wines were obtained with the chemical cluster thinning in settings and with the cluster thinning in veraison. However, the highest contents of total polyphenols, anthocyanins, flavanols and proanthocyanidins, and therefore the higher colour intensities of the wines, were obtained with the application of Etephon in veraison. This treatment had no effect of cluster thinning itself, so it did not have any incidence on the production, which was similar to the witness for all the years. The other treatments determined a significant decrease of the production with regard to the 6-bud pruning. En un viñedo de Tannat ubicado en la región Sur de Uruguay se estudió, durante cuatro años (1997 a 2000), el efecto de distintos tratamientos sobre la producción de uva y madera y las características de los vinos. El diseño experimental fue de parcelas al azar, con 30 plantas por tratamiento. Las plantas se condujeron en espaldera alta, con poda Guyot doble. Los tratamientos considerados fueron seis: raleo manual de racimos al 50 % en cuajado o en envero, raleo químico (aplicaciones de etefón) en los mismos momentos, y podas a 4 y a 6 yemas por cargador, tomando este último como testigo. Se vinificaron en tinto 80 kilos de uva por tratamiento, con idénticas condiciones de elaboración en todos los casos. Los vinos se analizaron al mes del final de la fermentación alcohólica, determinándose la composición global, la composición fenólica y el color. Se observaron diferencias significativas en el comportamiento de los distintos tratamientos en los distintos años. En cada año, hubo diferencias estadísticas entre tratamientos para los distintos parámetros considerados. Los mayores contenidos de alcohol en los vinos se obtuvieron con el raleo químico en cuajado y con el raleo manual en envero.En cambio, los mayores contenidos de polifenoles totales, antocianos, flavanos y proantocianidinas, y por consiguiente las mayores intensidades colorantes de los vinos, se obtuvieron con la aplicación de etefón en envero. Este tratamiento no tuvo un efecto de raleo propiamente, por lo que no incidió sobre la producción, que fue similar a la del testigo en todos los años. Los demás tratamientos determinaron una disminución significativade la producción con respecto a la poda a 6 yemas. Coeditada entre Facultad de Agronomía - Udelar y el Instituto Nacional de Investigación Agropecuaria (INIA) 2002-06-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1357 10.31285/AGRO.06.1357 Agrociencia Uruguay; Vol. 6 No. 1 (2002); 53- 62 Agrociencia Uruguay; Vol. 6 Núm. 1 (2002); 53- 62 Agrociencia Uruguay; v. 6 n. 1 (2002); 53- 62 2730-5066 spa https://agrocienciauruguay.uy/index.php/agrociencia/article/view/1357/1646 Copyright (c) 2024 Agrociencia Uruguay https://creativecommons.org/licenses/by/4.0 |