Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 2
Written by Liliana PÎRCĂLABU, Marian ION, Steliana Paula BARBU, Georgeta TUDOR, Alexandra BUCUR
The researches were carried out in the period 2020-2024, at the wine center Valea Calugareasca within six viticultural plantations with the varieties Feteasca neagra, Cabernet Sauvignon, Merlot, Negru aromat, Novac and Olivia, particularly valuable varieties from an oenological point of view, which are part of the basic assortment for the production of quality red wines. In the last 4 years, the climate has changed in the sense that the thermal regime has increased and the water deficit was accentuated especially during the vegetation period of the vine. The level of the sugars in grape juice has varied between 270.4 g/l (Negru aromat), 254.4 g/l (Novac) and 237 g/l (Merlot), but secondary metabolites such as anthocyanins, negatively affected by high temperatures and with oscillations between 1854 mg/l (Novac), 1540 mg/l (Cabernet Sauvignon) and 1155 mg/l (Olivia). Regarding the content in total polyphenols, the maximum was obtained by the varieties Olivia (81 mg/l), Novac (78 mg/l), Negru aromat (73 mg/l) compared to the variety Cabernet Sauvignon, in which the content in total polyphenols was only 41 mg/l.
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