terclim by ICS banner
IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2013 9 GiESCO 2013 – Session 6: Training systems 9 Reducing yield loss in grapevine with partial shading of the canopy

Reducing yield loss in grapevine with partial shading of the canopy

Abstract

The grapevines of the Demarcated Region of Douro are exposed to high temperatures and intense solar radiation during the growing season with negative consequences for yield, berry composition and wine quality. The hypothesis that partial shading of the canopy could reduce this loss and increase the must quality was tested in an experimental field set up in the Douro Superior in 2010. This communication reports on the yield of partially shaded grapevines during three growing seasons and the conclusion is that shading can significantly reduce yield loss due to dehydration of the berries.

Download the extended abstract
Publication date: 07/09/2026

Issue: GiESCO 2013

Type: Oral

Authors

Manuel Oliveira1,*, José Teles2, Pedro Barbosa3, Francisco Olazabal3, Jorge Queiroz2,4

1 Universidade Trás-os-Montes Alto Douro – CITAB, Agronomy. Vila Real, Portugal

2 Universidade do Porto – Faculdade de Ciências, Departamento Geociências Ambiente Ordenamento Território

3 Quinta do Vale Meão, 5150-501 Vila nova de Foz Coa, Portugal

4 Laboratório Associado REQUIMTE, Faculdade de Ciências, Universidade do Porto, Portugal

Contact the author*

Keywords

Douro, shading, must quality, production

Tags

GiESCO | GiESCO 2013 | IVES Conference Series

Citation

Related articles…

Risk of late frost events in viticulture – temperature trends, phenological observations and spatial analysis based on digital terrain models in Franconia/Germany

In the course of global warming a general decrease of frost days per year and in spring can be stated. However, in viticulture this matter of fact doesn´t lead to a reduction of the risk of damages to grapevines by late spring frost events.

Read More

Impact of leaf to fruit ratio on grape composition in Merlot grapevines

Adjustments of viticultural practices are required to adapt to climate change. In particular, vineyard management that vary the fruit to leaf area ratio is an important option to maintain and enhance fruit quality.

Read More

Modelling water and sugar flux to developing berries suggests early cessation of sugar accumulation and substantial xylem backflow

A model of the developing berry was constructed with data from published studies as well as 13 varieties grown in Davis, CA (USA).

Read More

Estimating leaf area and leaf area index in VSP trained grapevines under different management systems (Vitis vinifera L. cv. Riesling)

The aim of this study was to validate and implement different non-destructive methods of leaf area and leaf area index (LAI) determination in VSP trained grapevines (Vitis vinifera L. cv. Riesling) in a field trial comparing different management systems (i.e. integrated (GAP) and two different organic (European Union Regulation 834/07) management systems).

Read More

Classification for timing of flowering and veraison of a wide range of Vitis vinifera cultivars with the “GFV” model

In viticulture, the timing of phenology is critical to optimize grape quality potential particularly so in cool climates. Flowering and veraison are key phenological stages for grapevines.

Read More