Utjecaj ampelotehničkih zahvata na kemijski sastav grožđa sorata "Zlatarica vrgorska" i " Trnjak" u vinogorju Vrgorac

master's thesis

• Title (english): The influence of ampelotehnical measures on the chemical compositions of grapes of the varieties ‘Zlatarica vrgorska’ and ‘Trnjak’ in the Vrgorac vineyard
• Author: Marija Brkljačić
• Mentor: Željko Andabaka (mentor)
• Committee member: Željko Andabaka (predsjednik povjerenstva)
• Committee member: Marko Karoglan (član povjerenstva)
• Committee member: Domagoj Stupić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Viticulture and Enology); Zagreb
• Defense date and country: 2023-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

'Zlatarica vrgorska' i 'Trnjak' autohtone su sorte vinove loze koje se uzgajaju na području
vinogorja Vrgorac. Zbog njihove ugroženosti aktivno se radi na očuvanju sorti. Defolijacija i
prorjeđivanje grozdova zahvati su zelene rezidbe. Ovisno o periodu defolijacija može biti rana
ili kasna. Defolijacija se može provoditi u zoni grozdova i iznad zone grozdova. Prorjeđivanje
grozdova provodi se najčešće od kraja cvatnje (oplodnje) pa do pojave šare. U ovom radu
istraživan je utjecaj ampelotehničkih zahvata na kemijski sastav grožđa. Postavljeni su
ampelotehnički pokusi na dvije lokacije. Pokusi su uključivali defolijaciju i prorjeđivanje
grozdova kod sorte 'Zlatarica vrgorska', dok su kod sorte 'Trnjak crni' uključivali defolijaciju
provedenu na dva načina. Defolijacija u zoni grožđa pokazala je statistički značajan utjecaj na
sadržaj šećera i ukupnih kiselina, dok defolijacija iznad zone grožđa nije pokazala značajan
utjecj na kemijski sastav grožđa sorte 'Trnjak'. Analiza kemijskih pokazatelja kvalitete mošta
ukazala je na povećanje šećera u moštu, a smanjenje ukupnih kiselina u obje varijante na
lokaciji Topolac te u varijanti prorjeđivanja i defolijacije na lokaciji Telčuša kod sorte 'Zlatarica
vrgorska'. Kod analize hlapljivih spojeva lokacija je imala značajan utjecaj.

Abstract (english)

'Zlatarica vrgorska' and 'Trnjak' are autochthonous grape varieties grown in the Vrgorac
vineyard area. Due to their danger, active efforts are being made to preserve the varieties.
Defoliation and cluster thinning are interventions of green pruning. Depending on the period,
defoliation can be early or late. Defoliation can be carried out in the cluster zone and above
the cluster zone. Cluster thinning is usually carried out from the end of flowering (fertilization)
until the appearance of the pattern. In this paper, the influence of ampelotechnical
procedures on the chemical composition of grapes was investigated. Ampelotechnical
experiments were set up at two locations. Experiments included defoliation and cluster
thinning in the variety 'Zlatarica vrgorska', while in the variety 'Trnjak crni' they included
defoliation carried out in two ways. Defoliation in the grape zone showed a statistically
significant effect on the content of sugar and total acids, while defoliation above the grape
zone did not show a significant effect on the chemical composition of grapes of the 'Trnjak'
variety. The chemical analysis of must quality indicated an increase in sugar in the must, and
a decrease in total acids in both varieties at the Topolac location and in the thinning and
defoliation variant at the Telčuša location for the variety 'Zlatarica vrgorska'. In the analysis of
volatile compounds, the location had a significant influence.

• Keywords: 'Zlatarica Vrgorska'; 'Trnjak'; ampelotehnički zahvati; defolijacija
• Keywords (english): 'Zlatarica Vrgorska'; 'Trnjak'; ampelotehnical measures; defoliation
• Language: croatian
• URN:NBN: urn:nbn:hr:204:144176
• 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: 2023-10-27 08:39:35