Effect of Partial Grapevine Defoliation (Vitis vinifera) on Wine Quality

Published

2013-01-01

Efecto de la Defoliación Parcial en Uva (Vitis vinifera) sobre la Calidad del Vino

Keywords:

Ecophysiology, quality characteristics, abiotic factors, maturity index (en)
Ecofisiología, características de calidad, factores abióticos, índice de madurez (es)

Downloads

Authors

Jaime Ernesto Peña Olmos
Fánor Casierra Posada
Martin Herzberg

Abstract (en)
Abstract (es)

The wine quality was determined for partially-defoliated

grapevines grown in Villa de Leyva, Colombia at an elevation of

2,143 masl. The experimental design was totally randomized,

with two treatments (50% defoliation and 0% defoliation) and

three repetitions per treatment. The planting material consisted

of five-year-old vines of Vitis vinifera cv. Chardonnay, trained

to trellises, with a spacing of 2.1 m x 1 m. Every fifteen days,

the plants in the defoliation treatment underwent the removal

of half of the newly-emerged leaves. Before undertaking the

micro-vinification process, the total soluble solids (TSS) were

measured in the grape must, and after a fermentation of 100

days, wine quality parameters were measured, namely: residual sugars (TSS of the wine), pH, total titratable acid (TTA), and potential alcohol content of the wine. In the plants undergoing partial defoliation, the total soluble solids in the grape must increased, as well as the wine pH and potential alcohol content. At the same time, total titratable acid decreased in the wine of partially-defoliated plants. These results demonstrate that the wine quality was greatly improved by the reduction of leaf area in Chardonnay variety grape plants.

Con el uso de un diseño completamente aleatorizado, con dos tratamientos (defoliación al 50% y sin defoliación parcial) y tres repeticiones por tratamiento, se determinó la calidad del vino en plantas de uva sometidas a defoliación parcial temprana en Villa de Leyva – Colombia a una altitud de 2.143 msnm. Como material vegetal se utilizaron plantas de Vitis vinifera L. cv. Chardonnay de cinco años de edad, sembradas en un sistema de espalderas a 2,1 x 1 m. Quincenalmente, se realizó la defoliación parcial a las plantas, la cual consistió en retirar una de cada dos

hojas recién emergidas en cada una de las plantas sometidas al tratamiento de defoliación. Antes de iniciar el proceso de microvinificación se determinaron los sólidos solubles totales (SST) del mosto, y posterior a la fermentación alcohólica, la cual tuvo una duración de 100 d, se determinaron los parámetros de calidad del vino, como: azucares residuales (SST del vino), pH, acidez total titulable (ATT) y contenido potencial de alcohol del vino. Se encontró un aumento en los SST del mosto, el pH y el contenido potencial de alcohol del vino procedente de las plantas defoliadas. A su vez, la ATT del mismo disminuyó en las plantas defoliadas. Estos resultados demuestran que la calidad del vino

se vio favorecida fuertemente por la disminución del área foliar en plantas de uva cv. Chardonnay.

Downloads

Download data is not yet available.

License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

The journal allows the author(s) to maintain the exploitation rights (copyright) of their articles without restrictions. The author(s) accept the distribution of their articles on the web and in paper support (25 copies per issue) under open access at local, regional, and international levels. The full paper will be included and disseminated through the Portal of Journals and Institutional Repository of the Universidad Nacional de Colombia, and in all the specialized databases that the journal considers pertinent for its indexation, to provide visibility and positioning to the article. All articles must comply with Colombian and international legislation, related to copyright.

Author Commitments

The author(s) undertake to assign the rights of printing and reprinting of the material published to the journal Revista Facultad Nacional de Agronomía Medellín. Any quotation of the articles published in the journal should be made given the respective credits to the journal and its content. In case content duplication of the journal or its partial or total publication in another language, there must be written permission of the Director.

Content Responsibility

The Faculty of Agricultural Sciences and the journal are not necessarily responsible or in solidarity with the concepts issued in the published articles, whose responsibility will be entirely the author or the authors.