Vpliv ampelotehničnih ukrepov na količino in kakovost grozdja in vina sorte 'Malvazija' v vinorodnem okolišu Vipavska dolina

Bizjak, Ema (author), Rusjan, Denis (mentor)

V bločnem poskusu leta 2023 smo v vinogradu HCBF v Vipavski dolini poskušali ugotoviti, kako različni ampelotehnični ukrepi vplivajo na količino in kakovost grozdja in vina sorte 'Malvazija'. Poskus je zajemal štiri obravnavanja, in sicer kontrolo (K), zgodnje vršičkanje (ZV), ovijanje mladik (OVM) in razlistanje mladih listov (RML). Največjo povprečno maso 100 jagod smo stehtali na trtah obravnavanja OVM (268±3,18 g), najmanjšo povprečno maso (232±4,18 g) pa na trtah obravnavanja ZV. Povprečna vsebnost sladkorjev v jagodah je bila največja pri obravnavanjih K (18,1±0,44 °Brix) in ZV (18,1±0,93 °Brix), najmanjša pa pri obravnavanju RML (15,8±0,26 °Brix). Najvišji povprečni pH v jagodah smo izmerili pri obravnavanju ZV (3,37±0,02), najnižji pa pri obravnavanju OVM (3,33±0,02).V povprečju smo največjo vsebnost kislin v jagodah izmerili pri obravnavanju RML (6,58±0,04 g/l), najmanjšo pa pri obravnavanju ZV (5,77±0,44 g/l). Povprečna vsebnost reducirajočih sladkorjev je bila največja v vinu K (3,2 g/l), najmanjša pa v vinu RML (0,5 g/l). Najvišji povprečni pH smo izmerili v vinu ZV (3,43), najnižji pa v vinu RML (3,34). Vini RML in OVM sta vsebovali povprečno največ skupnih kislin (7,0 g/l), vino K pa najmanj (6,5 g/L). Največjo povprečno vsebnost alkohola smo izmerili v vinu K (10,8 vol. %), najmanjšo pa v vinu RML (9,0 vol. %). Obravnavanje RML je edino pokazalo vpliv na kakovost grozdja in vina sorte 'Malvazija'. Za pridobitev uporabnih podatkov, ki bi pomagali vinogradnikom pri pridelavi bolj kakovostnega grozdja, bi morali poskus izvesti večkrat.

• Language: Slovenian
• Keywords: vinska trta, rast, rodnost, kakovost, grozdje, vino, sorta, 'Malvazija'
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Year: 2024
• PID: 20.500.12556/RUL-162239
• COBISS.SI-ID: 208323331
• Publication date in RUL: 20.09.2024

Secondary language

• Language: English
• Title: The impact of ampelotechnic measures on the quantity and quality of grape and wine of 'Malvazija' variety in the Vipavska dolina winegrowing district

Abstract

In a block trial in 2023 in HCBF in the Vipava Valley, we studied how different ampelotechnic measures affect the quantity and quality of grapes and wine of the 'Malvazija' variety. The trial consisted of four treatments, control (K), early shoot topping (ZV), shoot wrapping (OVM) and young leaf removal (RML). The highest mass of 100 berries was weighed in the OVM treatment (268±3.18 g) and the lowest in the ZV treatment (232±4.18 g). The average sugar content of the berries was highest in the K (18.1±0.44 °Brix) and ZV treatments (18.1±0.93 °Brix) and lowest in the RML treatment (15.8±0.26 °Brix). The highest average pH value of the berries was measured in the ZV treatment (3.37±0.02) and the lowest in the OVM treatment (3.33±0,02). On average, the highest acidity of the berries was measured in the RML treatment (6.58±0.04 g/l) and the lowest in the ZV treatment (5.77±0.44 g/l). The average content of reducing sugars of the wine was highest in the K treatment (3.2 g/l) and lowest in the RML treatment (0.5 g/l). The highest average pH value was measured in the ZV treatment wine (3.43) and the lowest in the RML treatment (3.34). The wines of the treatments RML and OMV contained on average the highest total acidity (7.0 g/l) and the K treatment contained the lowest total acidity (6.5 g/l). The highest average alcohol content was measured in the K treatment (10.8 vol. %) and the lowest in the RML treatment (9.0 vol. %). The RML treatment was the only one to show an effect on the quality of the grapes and the wine of the 'Malvasia' variety. The experiment should be repeated several times in order to obtain useful data to help growers produce better quality grapes.

• Keywords: grapevine, growth, yield, quality, grapes, wine, variety, 'Malvazija'