terclim by ICS banner
IVES 9 IVES Conference Series 9 Withering of the ‘Moscato giallo’ grapes under covered space

Withering of the ‘Moscato giallo’ grapes under covered space

Abstract

For the purpose of producing predicate wines in northern part of Croatia, grapes are traditionally left on the vine unpicked. However, grapes on the vine are exposed to unfavorable environmental conditions that affect rapid rotting and attacked by birds. To eliminate the mentioned risks, the grapes can be picked and placed in a protected space (loft, greenhouse, etc.) suitable for drying. This study presents the results of research on withering grapes of the ‘Moscato giallo’ variety in two tretment: sun drying (under covered terrace) and drying in the shade (loft). The following quality parameters were monitored: mass of grapes, sugar concentration, content of total acids, pH, content of organic acids. The total sugar content was determined refractometrically, the acid content was determined by neutralization with 0.1M NaOH and bromo-thymol as an indicator of pH change, the analysis of organic acids was carried out on an HPLC device. The research proved that in both treatment weight of the grapes and concentration of tartaric acid decreased during withering, while the concentration of sugar, malic acid, citric acid, and the content of total acids increased. Process of withering was shorter in sun drying treatment. Also, final concentration of sugar was higher in sun drying treatment. Final concentration of total acids, tartaric and malic acid was higher by drying in shade.

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Domagoj Stupić1*, Laura Banović1, Iva Šikuten1, Petra Štambuk1, Ivana Tomaz1, Darko Preiner1, Zvjezdana Marković1, Željko Andabaka1, Edi Maletić1, Jasminka Karoglan Kontić1

1 University of Zagreb Faculty of Agriculture, Svetošimunska cesta 25, Zagreb, Croatia

Contact the author*

Keywords

withering, Moscato giallo, sun drying, shade drying, organic acids

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

La zonazione viticola e i compiti dell’amministrazione regionale

Solo attraverso un adeguato intervento di estirpazione e reimpianto dei vigneti è possibile preservare, adeguare e valorizzare il patrimonio viticolo e le produzioni che da esso derivano.
Il reimpianto dei vigneti è pertanto da intendersi come una normale pratica agricola, alla pari della rimonta di stalla in campo zootecnico, ma può assumere toni problematici quando, come si verifica adesso in Toscana per una serie di circostanze legate alla profonda trasfor­mazione della viticoltura avvenuta negli ultimi 30 anni, troppi impianti giungono contem­poraneamente a fine ciclo produttivo e devono essere rinnovati.

“Un grande theatro di amenissimi colli”: “tutti coltivati et abondanti di frutti eccellentissimi e di buonissime viti”

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" text_orientation="center" custom_margin="65px||18px||false|false"...

Significance of factors making Riesling an iconic grape variety

Riesling is the iconic grape variety of Germany and accounts for 23% of the German viticulture acreage, which comprises 45% of the worldwide Riesling plantings. Riesling wines offer a wide array of styles from crisp sparkling wines to highly concentrated and sweet Trockenbeerenauslese or Icewines. However, its thin berry skin makes Riesling more vulnerable to detrimental environmental threats than other white wine varieties.  

New tool to evaluate color modifications during oxygen consumption in white and red wines

Measuring the effect of oxygen consumption on the color of wines as the level of dissolved oxygen decreases over time is very useful to know how much oxygen a wine can consume without significantly altering its color. The changes produced in wine after being exposed to high oxygen concentrations have been studied by different authors, but in all cases the wine has been analyzed once the oxygen consumption process has been completed. This work presents the results obtained with the use of an equipment designed and made to measure simultaneously the level of dissolved oxygen and the spectrum of the wine, during the oxygen consumption process from saturation levels with air to very low levels, which indicate the total consumption of the dosed oxygen[1,2].

Diagnosis of soil quality and evaluation of the impact of viticultural practices on soil biodiversity in a Southwestern France vineyard

The soil plays a pivotal role in the agroecological transition processes, due to its numerous implications in production support, water regulation, air and nutrient supply, and its function of reservoir for the major part of planet biodiversity. Therefore, soil quality and adequate soil management are key levers for an ecologically and economically sustainable viticulture. Gascogn’Innov (2017-2022) is an Operational Group funded by the European Innovation Partnership for Agriculture. As such, it gathered winegrowers from the south-west of France (Gascony), scientists, advisors and technicians, around a project focused on the biological functioning of viticultural soil and the design of better-adapted technical paths for soil protection.