Terroir 1996 banner
IVES 9 IVES Conference Series 9 Efectos del deshojado y de su combinación con el aclareo de Racimos en los componentes básicos de la producción y del Mosto, sobre cv. Tempranillo en la D.O. Ribera del Duero

Efectos del deshojado y de su combinación con el aclareo de Racimos en los componentes básicos de la producción y del Mosto, sobre cv. Tempranillo en la D.O. Ribera del Duero

Abstract

[English version below]

Las técnicas de manejo del canopy de la vid pueden favorecer la adaptación de los sistemas de conducción a diversas condiciones de cultivo para obtener uva de calidad. Con este objetivo se desarrolló a lo largo de 3 años un ensayo en secano con la variedad Tempranillo conducida en espaldera, en la región vitivinícola de Denominación de Origen Ribera del Duero (España).
Se estudiaron los efectos del deshojado basal (aplicado en la fase de maduración, una vez pasado el envero), suprimiendo unas 4 hojas de la base de los pámpanos, y de su combinación con el aclareo de racimos (suprimiendo el 35 % de los racimos existentes en la cepa en el momento del envero) en el rendimiento, en el desarrollo vegetativo y en la composición del mosto.
Se ha observado que la combinación del aclareo con el deshojado redujo el rendimiento final en uva sólo un 20%, debido a la compensación producida por el aumento del peso de la baya. Dicho tratamiento presentó una tendencia a incrementar ligeramente el peso de madera de poda.
La concentración de azúcares en el mosto puede verse beneficiada por el deshojado basal, pero su combinación con el aclareo de racimos mostró un efecto muy claro a aumentar el grado alcohólico probable del mosto. La acidez total puede ser reducida por el deshojado, pero sobre todo cuando se practica junto con el aclareo de racimos.
En general, los efectos del aclareo de racimos en el envero combinado con el deshojado favorecen la evolución de la maduración, a costa de una reducción del rendimiento en uva, mientras que los efectos del deshojado simple en la variedad Tempranillo, a través de una reducción de los ácidos, dependen de las condiciones ambientales anuales en zonas como la D.O. Ribera del Duero.

The techniques of grapevine canopy management can help the training systems to become adapted to different growth conditions in order to improve the quality of the grapes. Focused on this objective, a trial was carried out over 3 years in the A.O. Ribera del Duero with the variety Tempranillo grown under non-irrigation conditions and trained as a vertical trellis system.
We have studied the effects of the basal leaf removal (in the ripening period, after veraison), taking out 4 leaves from the base of shoots, and of its combination with the cluster thinning (removing 35 %of vine clusters at veraison) in yield, vegetative development and must composition.
It was observed that the combination of cluster thinning and leaf removal reduced the final yield by only 20 %, due to the compensation caused by the increase of berry weight. This treatment showed a tendency to lightly increase the pruning weight.
Sugar concentration can be increased by the basal leaf removal, but the combination with the cluster thinning exhibited a clear effect to increase the probable alcoholic degree. Total acidity can be reduced by leaf removal, but basically in combination with cluster thinning.

DOI:

Publication date: February 24, 2022

Issue: Terroir 2000

Type: Article

Authors

Yuste, J.*, Rubio, J.A.*, Baeza, P.** and Lissarrague, J.R.**

*Servicio de Investigación Agraria de Castilla y León. Aptdo. 172. 47080 – Valladolid
** Dpto. Producción Vegetal. E.T.S.I. Agrónomos. Univ. Politécnica. 28040 – Madrid

Tags

IVES Conference Series | Terroir 2000

Citation

Related articles…

NACs intra-family hierarchical transcriptional regulatory network orchestrating grape berry ripening

Considering that global warming is changing berry ripening timing and progression, uncovering the molecular mechanisms and identifying key regulators governing berry ripening could provide important tools in maintaining high quality grapes and wine. NAC (NAM/ATAF/CUC) transcription factors represent an interesting family due to their key role in the developmental processes control, such as fruit-ripening-associated genes expression, and in the regulation of multiple stress responses. Between the 74 NAC family members, we selected 12 of them as putative regulators of berry ripening: NAC01, NAC03, NAC05, NAC11, NAC13, NAC17, NAC18, NAC26, NAC33, NAC37, NAC60 and NAC61.

‘Cabernet Sauvignon’ (Vitis vinifera L.) berry skin flavonol and anthocyanin composition is affected by trellis systems and applied water amounts

Trellis systems are selected in wine grape vineyards to mainly maximize vineyard yield and maintain berry quality. This study was conducted in 2020 and 2021 to evaluate six commonly utilized trellis systems including a vertical shoot positioning (VSP), two relaxed VSPs (VSP60 and VSP80), a single high wire (SH), a high quadrilateral (HQ), and a guyot (GY), combined with three levels of irrigation regimes based on different crop evapotranspiration (ETc) replacements, including a 25% ETc, 50% ETc, and 100% ETc. The results indicated SH yielded the most fruits and accumulated the most total soluble solids (TSS) at harvest in 2020, however, it showed the lowest TSS in the second season. In 2020, SH and HQ showed higher concentrations in most of the anthocyanin derivatives compared to the VSPs. Similar comparisons were noticed in 2021 as well. SH and HQ also accumulated more flavonols in both years compared to other trellis systems. Overall, this study provides information on the efficacy of trellis systems on grapevine yield and berry flavonoid accumulation in a currently warming climate.

Characterisation of Sicilian Nero d’Avola grape and wine: A preliminary study

The chemical composition and the sensory characteristics of wine result from dynamic interactions between several factors including grape variety, soil, viticultural techniques, climate conditions, yeasts metabolism, oenological approaches. Recently, Grigg et al.

Wine growing regions global climate analysis

We depict the main features of five viticulture agroclimatic indices for 626 wine growing regions within 41 countries.

Dormancy conundrum: thermal requirements plasticity to reach budburst may be explained by annual environmental dynamics

Deciphering grapevine dormancy is crucial in the current context of climatic challenges: advancing budburst phenology and increased late frost probabilities, observed in the last decades and expected to further increase, require deeper understanding. Beyond higher mean temperatures, abiotic stresses such as water deficit have also been emphasized as actors. In this framework, we aimed at exploring new methodologies for tracking dormancy cycle and testing the interplay on its regulation of temperature dynamics and drought.
In a first experiment, twenty-one Vitis vinifera varieties were monitored during ecodormancy and budburst over three years.