Vpliv modifikacije gojitvene oblike na rastni in rodni potencial žlahtne vinske trte (Vitis vinifera L.) sorte Rebula

Vodopivec, Andrej (avtor), Rusjan, Denis (mentor)

Zimska rez je v vinogradu zelo pomemben ampelotehnični ukrep, ki daje izhodišče za nov kakovosten vinski letnik. V lastnem vinogradu s sorto 'Rebula' smo leta 2015 opravili bločni poskus s tremi obravnavanji, to so enojni guyot z vodoravno vezanim šparonom (EG), enojni guyot z v loku vezanim šparonom (L) ter cordone speronato (CS). S poskusom smo želeli ugotoviti vpliv modificirane gojitvene oblike na količino in kakovost grozdja ter vina sorte 'Rebula'. V začetku rastne dobe smo beležili rastni in rodni potencial. V številu vseh in odgnanih očes na trto so se med obravnavanji pokazale značilne razlike, saj sta obravnavanji CS in L imeli značilno več vseh očes, kot pa obravnavanje EG, medtem ko pa v številu rodnih in nerodnih očes med obravnavanji ni bilo značilnih razlik. Obravnavanje L je imelo na trto za 20 % značilno večje število kabernikov kot ostali dve obravnavanji. Med rastno dobo smo opravili vsa potrebna ampelotehnična dela. Ob trgatvi se med obravnavanji niso pokazale značilne razlike v kakovosti grozdja. Značilne razlike smo zabeležili med vini v vsebnosti alkohola (CS 11,4 vol.% ostali dve obravnavanji 10,4 vol.%), vsebnosti skupnega ekstrakta (CS 21,6 g/l ostali dve obravnavani približno 20,2 g/l), reducirajočih sladkorjev (CS 1,17 g/l ostali dve obravnavani približno 0,8 g/l), skupnih kislin (CS 4,7 g/l ostali dve obravnavani 5,3 g/l), hlapne kisline (CS 0,09 g/l ostali dve obravnavani približno 0,065 g/l). Pri organskih kislinah je bila značilna razlika samo pri vsebnosti vinske kisline (CS 2,4 g/l ostali dve obravnavani 2,8 g/l). Opravljeni poskus je bil enoleten in za boljše poznavanje vpliva modifikacije vinske trte na kakovost grozdja ter vina pa bi bilo potrebno poskus ponoviti vsaj še nadaljnje leto.

• Jezik: Slovenski jezik
• Ključne besede: vinska trta/Vitis vinifera/modifikacija gojitvene oblike/grozdje/vino/kakovost
• Vrsta gradiva: Magistrsko delo/naloga
• Organizacija: BF - Biotehniška fakulteta
• Leto izida: 2018
• PID: 20.500.12556/RUL-104878
• Datum objave v RUL: 14.10.2018

Sekundarni jezik

• Jezik: Angleški jezik
• Naslov: IMPACT OF TRAINNING SYSTEM MODIFICATION ON GROWTH AND YIELD OF GRAPEVINE (Vitis vinifera L.) 'REBULA' VARIETY

Izvleček

The winter pruning is a very important ampelotechnic measure in the vineyard representing a basis for a new wine quality vintage. In our own vineyard with 'Rebula' grapevine variety a triple block study with three treatments was conducted in 2015. A single guyot with a horizontally bound cane (EG), a single guyot with an arch-shaped cane (L) and a cordone speronato (CS) were introduced. We wanted to determine the impact of the modified training system on the quantity and quality of the ‘Rebula’ grape and wine. At the beginning of the growing season, we recorded a vine growth and fertility potential. Significant differences were observed in the number of buds per vine, where CS and L had a significantly higher number of all buds than EG, while the difference in fertile and unfertile buds among treatment were not noticeable. L had 20% higher number of the inflorescences than the other two treatments. During the growth season, all the ampelotechnic measures were conducted. At harvest, no significant differences in the grape quality among treatments were observed. Significant differences among treatments were found in alcohol content of the wine (11.4 vol.% at CS, 10.4 vol.% at EG and L), total extract content (CS 21.6 g/l; EG and L approx. 20.2 g/l), reducing sugars (CS 1.17 g/l; EG and L approx. 0.8 g/l), total acidity (CS 4.7 g/l; EG and L approx. 5.3 g/l), and volatile acidity (CS 0.09 g/l; EG and L approx. 0,065 g/l). Among organic acids, a significant difference in the tartaric acid content (CS 2.4 g/l; EG and L approx. 2.8 g/l) was recorded, only. The study was conducted only in vintage 2015 and for obtaining a better knowledge regarding the impact of modified training system on ‘Rebula’ grape and wine quality it should be done at least three consecutive vintages.

• Ključne besede: grapevine/Vitis vinifera/grape/wine/quality