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…

Effects of regulated deficit irrigation (RDI) on grape composition in Monastrell grapevines under semiarid conditions

The influence of two pre-veraison and post-veraison regulated deficit irrigation (RDI) strategies on yield and grape quality was analyzed during a two year period for mature grapevines (cv. Monastrell) in Southeastern of Spain

Read More

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.

Read More

On the losses of dissolved CO2 from laser-etched champagne glasses under standard tasting conditions

Under standard champagne tasting conditions, the complex interplay between the level of dissolved CO2 found in champagne, its temperature, the glass shape, and the bubbling rate, definitely impacts champagne tasting by modifying the neuro-physico-chemical mechanisms responsible for aroma release and flavor perception. Based on theoretical principles combining heterogeneous bubble nucleation, ascending bubble dynamics and mass transfer equations, a global model is proposed (depending on various parameters of both the wine and the glass itself), which quantitatively provides the progressive losses of dissolved CO2 from laser-etched champagne glasses.

Read More

Cultivation site effect on the quality of Moscato di Pantelleria

n 1997 and 1999, sixteen cultivation sites of cv. Muscat of Alexandria different for pedological conditions, altitude and exposition were selected through all Pantelleria isle. In 1997 in each site

Read More

Relevance of an immunoassay test for rapid detection of Botrytis cinerea in ‘Ugni blanc’ musts and wines

A new immunoassay kit, called Botrytis Lateral Flow Device has been tested to detect Botrytis cinerea on musts and wines. The comparison of the immunoassay result with the quantitative analysis of usual markers (gluconic acid, sugars and polyols) showed the relevance of this innovative tool.

Read More