GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Influence of trellis system and shoot density in yield and grape composition of a vineyard of Cabernet Sauvignon, in warm climate

Influence of trellis system and shoot density in yield and grape composition of a vineyard of Cabernet Sauvignon, in warm climate

Abstract

Context and purpose of the study – In vineyards grown in warm areas, it is usual that the stage of maturity of the grapes is fast and easily reach a high concentration of sugar and low acidity, but not a adequate phenolic maturation. The geometry of the trellis system and the shoot density can modify the microclimate of the cluster and, therefore, the maturation process.

Material and methods – In order to know whether, in warm areas, free or semi-free foliage systems are most appropriate to achieve a maturity more balanced than systems with guided foliage, such as the vertical shoot positioned, during 2013 and 2014 developed a test in a vineyard of Cabernet Sauvignon in Albacete (Spain). Comparing two trellis systems – vertical shoot positioned and sprawl -, each of them with three shoot densities – 35000, 55000 and 70000 shoots per hectare-. During maturation were determined the weight of the grape and the basic composition of the must (° Brix, pH and total acidity). Yield components and the grape phenolic components were determined at harvest.

Results – In both trellis systems the increased of crop load generated a proporcional increase in yield respect number of shoot, in addition to a delay in maturation, with lower concentrations of sugar and total phenols, and higher acidity. The vineyard in sprawl reached, usually, higher concentrations of sugar, but with equal or lower levels of acidity on vertical shoot positioned, which means a better sugar/acidity balance. The effect of the trellis system on the grape phenolic components was not consistent for the two years of study.

Download the PDF

DOI:

Publication date: September 27, 2023

Issue: GiESCO 2019

Type: Poster

Authors

Emilio PEIRO1,2*, Pedro JUNQUERA1,2, José Ramón LISSARRAGUE1,2

1 Grupo de Investigación en Viticultura. E.T.S.I.A.A.B. Universidad Politécnica de Madrid. C/ Senda del Rey s/n, 28040. Madrid, Spain
2 Gestión Integral de Viticultura (GIVITI), C/ Alcántara nº 46, bajo drcha, 28006, Madrid, Spain

Contact the author

Keywords

trellis systems, shoot density, yield, berry composition

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

Les terroirs viticoles ont une histoire

The historian starts from a scientific, rigorous and recent definition of the wine-growing region. “A viticultural terroir is made up of several homogeneous units: geological and pedological elements (texture,
grain size, thickness, mineralogical nature, chemical components), geomorphological (altitude, slope, exposure), climatological (rainfall, temperature, insolation)”. Absent from this definition, the man is fortunately reintroduced a little further. By associating viticulture and winemaking, it forms a “couple” with the terroir and this couple.

Read More

Spiders in vineyards show varying effects of inter-row management and the surrounding landscape

In vineyards, management and the surrounding landscape can have different effects on spiders. In temperate regions management (organic vs. conventional) may have less strong effects than for other crops.

Read More

Preliminary results of the effect of post veraison pre-pruning on grape and wine composition in Tannat and Merlot

The seasonal’s climatic conditions determine the composition of grapes at harvest as they affect the vine’s physiology and development. High temperatures during the grape ripening period cause a high accumulation of sugars and degradation of fruit acidity ,and alter the synthesis of polyphenols. Therefore, some vineyard management can be applied in order to modify grapevine impact on climate variability. One example is the pre-pruning at the beginning of grape ripening, which can delay the ripening period and modify the composition of the grapes at harvest. This work aims to evaluate the pre-pruning field technique on yield components and alcohol content in wines of Tannat and Merlot varieties.

Read More

Effects of soil characteristics on manganese transfer from soil to vine and wine

Aim: In recent times the export of Beaujolais wines has been jeopardised due to a limit of manganese content (Mn) in wine implemented by China (2 mg/L), related to suspicions of potassium permanganate fraud. Nevertheless, soil Mn content may be high in some soil types in Beaujolais. The aim of this study was to improve knowledge of manganese transfer from soil to vine and wine because data on this subject is scarce.

Read More

Valutazione comparativa di cloni di Pinot nero per la produzione di vini base spumante in alcuni ambienti del Piemonte

Un vasto programma si riferisce alla verifica di 28 selezioni clonali di Pinot nero atte a vini base spumante. Gli impianti sono stati realizzati in diversi ambienti delle Langhe e del Monferrato nel periodo 1992-1996, in 57 vigneti diversi e su una superficie complessiva di circa 50 Ha.

Read More