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Published on: December 1, 2023
Dosing oxygen from the early stages of white winemaking: Effect on oxidation-reduction potential, browning stability,
Ilaria Benucci1, Martina Cerreti1, Marco Esti1
1Department of Agriculture and Forest Sciences (DAFNE), Tuscia University, via S. Camillo de Lellis snc, 01100 Viterbo, Italy.
Abstract:
This study investigated the effect of controlled oxygen addition during alcoholic fermentation (4 mg/L, at 2nd, 4th, 6th, 10th, 14th, 16th, 20th day) and aging on lees (2 mg/L, every 15 days for 3 months) in a stainless-steel tank for white wine production from a nearly neutral grape. Under less reductive conditions (Ox), alcoholic fermentation was completed in 27 days, whereas one extra week was required under more reductive conditions (no-Ox). The greatest amount of dissolved oxygen in Ox wine triggered the increase of redox potential (EH) starting from the end of alcoholic fermentation and throughout aging (169 and 150 mV in Ox and no-Ox wine, respectively), also improving the wine resistance to browning. Oxygen addition from the early stages of winemaking significantly modulated volatile composition and sensory attributes, which may contribute to the diversification of wine style.
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