Utjecaj roka berbe i vinogradarskog položaja na polifenolni i kiselinski profil mošta kultivara 'Malvazija istarska'

master's thesis

• Title (english): The influence of harvest date and vineyard position on polyphenol and acidic profile of must of cultivar 'Malvazija istarska'
• Author: Dominik Anđelini
• Mentor: Ana Jeromel (mentor)
• Committee member: Ana Jeromel (predsjednik povjerenstva)
• Committee member: Ana Marija Jagatić Korenika (član povjerenstva)
• Committee member: Marko Karoglan (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Viticulture and Enology); Zagreb
• Defense date and country: 2020-07-03, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Cilj ovog istraživanja bio je analizirati utjecaj roka berbe i vinogradarskog položaja, prvenstveno na polifenolni i kiselinski profil mošta kultivara 'Malvazija istarska', ali i na sadržaj šećera, pH te ukupne i pojedinačne organske kiseline. Istraživanje je provedeno na tri vinogradarska položaja 'Draškove njive', 'Križ 1' i 'Križ 2' u vinogradarskoj podregiji Hrvatska Istra. U jesen 2019. godine grožđe je pobrano u dva roka s razmakom 15-ak dana. Kemijska analiza mošta provedena je na Zavodu za vinogradarstvo i vinarstvo Agronomskog fakulteta u Zagrebu. 'Križ 1' imao je najveću ukupnu kiselost, sadržaj ukupnih fenola, ukupnih proteina i vinske kiseline te najniži pH. 'Draškove njive' imao je viši sadržaj šećera, te manje koncentracije ukupnih proteina i pojedinačnih organskih kiselina. Dobiveni rezultati ovog istraživanja potvrdili su utjecaj vinogradarskog položaja i roka berbe na kvalitetu grožđa te mogu poslužiti vinarima u određivanju roka berbe.

Abstract (english)

The aim of this study was to analyze the impact of harvest date and vineyard position on the polyphenolic and acidic profile, sugar content, pH and total and individual organic acids of the must of the cultivar ‘Malvazija istarska’. The research was conducted on three vineyard positions 'Draškove njive', 'Križ 1' and 'Križ 2' in the subregion Hrvatska Istra. In 2019, the harvest took place in two terms with 15 days interval. Chemical analysis of the must were done at the Department of Viticulture and Enology, Faculty of Agriculture in Zagreb. ‘Križ 1’ had the highest levels of total acidity, total phenols, total proteins, tartaric acid content and lower levels of pH. 'Draškove njive' had a higher sugar content, and a lower content of total proteins and organic acids. The results of this research confirmed the effect of vineyard position and harvest date on the quality of grapes and can serve winemakers in determining the harvest date.

• Keywords: 'Malvazija istarska'; vinogradarski položaj; rok berbe; polifenoli; kiselinski profil
• Keywords (english): 'Malvazija istarska'; vineyard position; harvest date; polyphenols; acidic profile
• Language: croatian
• URN:NBN: urn:nbn:hr:204:239563
• Study programme: Title: Horticulture; Study programme type: university; Study level: graduate; Academic / professional title: magistar/ magistra inženjer/inženjerka hortikulture (magistar/ magistra inženjer/inženjerka hortikulture)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-10-02 07:12:19