terclim by ICS banner
IVES 9 IVES Conference Series 9 Modulation of berry composition by different vineyard management practices

Modulation of berry composition by different vineyard management practices

Abstract

High concentration of sugars in grapes and alcohol in wines is one of the consequences of climate change on viticulture production in several wine-growing regions. In order to investigate the possibilities of adaptation of vineyard management practices aimed to reduce the accumulation of sugar during the maturation phase without reducing the accumulation of anthocyanins in grapes, a study with severe shoot trimming, shoot thinning, cluster thinning and date of harvest was conducted on Merlot variety in Istria region (Croatia), under the Mediterranean climate. Four factors which may affect grape maturation and its composition at harvest were investigated in a two-years experiment; severe shoot trimming applied at veraison when >80% of berries changed colour (in comparison to untreated control), shoot thinning (0 and 30%), cluster thinning (0 and 30%), and the date of harvest (early and standard harvest dates). Shoot thinning had no significant impact on berry composition, despite the obtained reduction in yield per vine. Lower Brix in grapes were obtained with earlier harvest date and if no cluster thinning was applied, although at the same time a reduction in the concentration of anthocyanins in berries was observed in these treatments. On the other hand, if severe shoot trimming was applied when >80% of berries changed colour, a reduction of Brix was obtained without a negative impact on berry anthocyanins concentration. We conclude that in cases when undesirably high sugar concentrations at harvest are expected, severe shoot trimming at 80% veraison may effectively be used in order to obtain moderate sugar concentration in berries together with the adequate phenolic composition.

DOI:

Publication date: May 31, 2022

Issue: Terclim 2022

Type: Poster

Authors

Marijan Bubola1, Tomislav Plavša1, Goran Zdunić2, Sara Rossi1, Ena Bestulić1 and Sanja Radeka1
1Institute of Agriculture and Tourism, Poreč, Croatia
2Institute for Adriatic Crops and Karst Reclamation, Split, Croatia

Contact the author



Keywords

severe shoot trimming, shoot thinning, cluster thinning, harvest date, berry composition

Tags

IVES Conference Series | Terclim 2022

Citation

Related articles…

Water retention properties of viticultural calcisols from D. O. P. Valdepeñas (Spain)

A good knowledge of the soil physicochemical properties, as well as its ability to retain and put the necessary water available to the plants, is essential when it comes at the design of an irrigation plan.

Read More

First results obtained with a terrain model to characterize the viticultural «terroirs» in Anjou (France)

En Anjou, une méthode de caractérisation des terroirs viticoles a été développée. Elle utilise un modèle de terrain basé sur la profondeur de sol et son degré d’argilisation.

Read More

Vintage influence on Grenache N, Syrah N and Mourvedre N in Côtes du Rhône (France)

Vintage is part of « terroir ». The aim of this work is to study, through vine and berry parameters, the effect of vintage on the three major red grape varieties in Côtes du Rhône : Grenache N, Syrah N and Mourvedre N. We first characterized vintages 1997 to 2003, highlighting similar features in grape development across the different cultivars since 2001 only.

Read More

Effect of foliar treatment of methyl jasmonate and nanoparticles doped with methyl jasmonate on Monastrell grape skin cell wall

The use of elicitors to promote the biosynthesis of secondary metabolites in grapes has been tackled in several reports, however its study linked to nanotechnology is less developed.

Read More

Preliminary studies of zoning applications in Goriška Brda (Collio) winegrowing region, Slovenia

Goriška Brda est la région viticole située le plus à l’ouest de la Slovénie, attenante au Collio d’Italie. Goriška Brda (2020 ha de vignobles) a une longue tradition d’élevage viticole. La proximité de la mer Adriatique (Golfe de Trieste) au sud-ouest et des Alpes Juliennes au nord contribue à un climat caractéristique et unique qui influe sur la croissance et la fertilité de la vigne. La constitution des sols, un climat typique et un relief mouvementé provoquent des différences dans la production du raisin, sa quantité et sa qualité. L’utilisation du zonage ou du microzonage permettraient d’atténuer les influences des facteurs climatiques et du sol sur la production de la vigne ou d’en profiter. Pour évaluer la signification des différents facteurs, nous avons résumé et réuni les modèles de différents auteurs.

Read More