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Original scientific paper

IMPACT OF NITROGEN FERTILIZATION ON THE CHEMICAL COMPOSITION OF CHARDONNAY, ITALIAN RIESLING AND WHITE RIESLING GRAPE CULTIVARS

Marko Karoglan ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Marin Mihaljević ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Luna Maslov ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Mirela Osrečak ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Ana Jeromel ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Bernard Kozina ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia
Rikard Petrić ; Faculty of Agriculture, University of Zagreb, Zagreb, Croatia


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Abstract

Nitrogen fertilization is one of the common farming practices in vine production which may affect the increase in vegetative mass of vine and grape yield, but also the dynamics of maturation related primaryly to differences in the concentrations of sugar, total acidity, and content of organic acids in grapes. The experiment was conducted in 2006 – 2007 years on cultivars Chardonnay, Riesling and Italian Riesling, with three different intensities of nitrogen fertilization 23 kg, 70 kg and 117 kg N/ha. The concentrations of sugar, malic and citric acid have not been changed due to nitrogen fertilization. Differences were observed in the Riesling grapes from 2006th year with 23 kg and 70 kg N/ha fertilization, and in the Chardonnay grapes with 117 kg N / ha fertilization.

Keywords

nitrogen fertilization, sugar, total acidity, malic, tartaric, citric acid, Chardonnay, Italian Riesling, White Riesling

Hrčak ID:

53772

URI

https://hrcak.srce.hr/53772

Article data in other languages: croatian

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