Naslov
Fermentation rate in White Riesling (Vitis vinifera L.) grape juice as affected by vineyard nitrogen fertilization

Autori
Karoglan, Marko ; Maslov, Luna ; Jeromel, Ana ; Osrečak, Mirela ; Kozina, Bernard ; Marijanović, Josip

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings. 46th Croatian and 6th International Symposium on Agriculture. Opatija. Croatia / Milan Pospišil - Zagreb : Regata d.o.o. Zagreb, 2011, 941-945

ISBN
978-953-6135-90-5

Skup
46. hrvatski i 6. međunarodni simpozij agronoma

Mjesto i datum
Opatija, Hrvatska, 14.02.2011. - 18.02.2011

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
brzina fermentacije; dušik; gnojidba; mošt
(fermentation rate; fertilization; grape juice; nitrogen)

Sažetak
Nitrogen (N) fertilizer (urea) was applied by hand to vineyard of White Riesling grapes at rates of 0, 23, 70 or 117 kg N/ha/year from 2006 to 2009. Fermentation rate increased with increasing N fertilization, although only one of four juices from 0 kg N/ha completed fermentation, while only two of four 23 kg N/ha completed fermentation. All juices from 70 and 117 kg N/ha completed fermentation, but fermentation rate was unecceptable slow. Long fermentation time was strongly correlated with low free amino nitrogen levels in all juices, varying from 13 to 40 mg/L. Nitrogen fertilization rate affected higher titratable acidity.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

POVEZANOST RADA