Utjecaj djelomične defolijacije i pinciranja na prinos i kvalitetu grožđa sorte vinove loze 'Belina starohrvatska'

master's thesis

• Title (english): Influence of partial defoliation and shoot topping on the yield and quality of the grapes variety ‘Belina starohrvatska’
• Author: Sara Šima Matković
• Mentor: Darko Preiner (mentor)
• Committee member: Darko Preiner (predsjednik povjerenstva)
• Committee member: Edi Maletić (član povjerenstva)
• Committee member: Jasminka Karoglan Kontić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Agriculture; (Department of Viticulture and Enology); Zagreb
• Defense date and country: 2019-09-11, Croatia
• Scientific / art field, discipline and subdiscipline: BIOTECHNICAL SCIENCES; Agronomy

Abstract

Programom revitalizacije autohtonih sorata Hrvatskog zagorja (2006. – 2020.) pronađene su pojedine autohtone sorte koje su se smatrale nestalima. Uspjelo se razlučiti skupinu sorata koje su se prije nazivale 'Belinama', a jedna se posebno istaknula: 'Belina starohrvatska'. Njezin najstariji trs je pronađen blizu rodne kuće Ljudevita Gaja u Krapini njezin najstariji trs. Kako bi se ova stara i zanemarena sorta mogla vratiti u modernu vinogradarsku proizvodnju, potrebna su istraživanja u odgovarajućem podneblju i potrebnim ampelotehničkim zahvatima.
Na području Hrvatskog zagorja, na lokalitetu Komor Začretski podignut je pokus radi evaluacije autohtonih sorata, među kojima je i 'Belina starohrvatska'. Budući da je sorta sklona osipanju, u 2017. se izvodilo pinciranje, a te i iduće godine i defolijacija kako bi se vidio utjecaj na prinos, kakvoću i pojavu Botrytisa. Tako su 2017. godine bile postavljene različite varijante pokusa: defolijacija prije cvatnje sa i bez pinciranja, pinciranje bez defolijacije, pinciranje s defolijacijom poslije cvatnje i kontrolom.
Na trsovima na kojima su se provodili zahvati defolijacije bilo je mnogo manje štete od sive plijesni i kisele truleži nego u kontroli. Zbog tih je šteta prinos u kontrolnoj varijanti bio reduciran u 2017. godine, dok su sve druge varijante imale veći prinos i sadržaj šećera. Također je ukupna kiselost mošta bila niža od kontrole. Budući da je bilo više oborina u 2017. godini nego u 2018. godini, prinosi su bili veći, ali slabije kakvoće sa manjim sadržajem šećera. Pinciranje se nije pokazalo potrebnim zahvatom jer 2017. godine nije imalo utjecaja na zametanje plodova te se nije provodilo u 2018.
Iako se ne može utjecati na vremenske prilike u pojedinoj godini, defolijacija se pokazala kao uspješnim zahvatom u borbi protiv Botrytisa pritom ne smanjujući prinos grožđa i kakvoću mošta.

Abstract (english)

Within the program of revitalization autochthonous varieties of Hrvatsko Zagorje (2006 – 2020)., some varieties were discovered which have been considered lost. In this project it was determined that one of the group of varieties known as ‘Beline’ and within them, one stood out, ‘Belina starohrvatska’. The oldest vine from this variety was found near the birthplace of Ljudevit Gaj in city of Krapina. In order to put this old and neglected variety back in modern viticultural production research on suitable sites, and growing practices are required.
In the area of Hrvatsko Zagorje at the site of Komor Začretski the experimental vineyard was established for the evaluation of autochthonous varieties including ‘Belina starohrvatska’. Due to the poor fruit set in 2017., shoot topping and defoliation was performed and in next year defoliation only to evaluate its effects on yield, fruit quality and occurrence of Botrytis. In 2017, different variations of experiments were set up: defoliation before flowering with and without topping, topping without defoliation, topping with defoliation after flowering, and control.
On the vines which have been defoliated there were less damage of grey mold and sour rot then in the control. Because of the damages yield in the control variation was reduced in 2017 year while all the others had higher yield and concentrations of sugars. Furthermore, total acidity of the must was lower than in the control. Since there was more precipitation in 2017, then in 2018., yield was higher but with lower quality followed with less concentration of the sugars. Topping has showed not to be necessary in 2017. because it did not affect fruit set, so it was not performed in 2018.
Even though we cannot influence the weather conditions in a specific year, defoliation showed to be a successful in fight against Botrytis and that it doesn’t reduce grape yield and quality of the must.

• Keywords: autohtoni sortiment; 'Belina starohrvatska'; defolijacija; pinciranje
• Keywords (english): native varieties; 'Belina starohrvatska'; defoliation; topping
• Language: croatian
• URN:NBN: urn:nbn:hr:204:037893
• 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: 2019-11-28 10:14:33