Quality Evolution of Turpan Dry Red Wine During Aging Under Controlled Micro-Oxygenation

Area of Science:

• Enology
• Food Chemistry
• Sensory Science

Background:

• Oxygen management is crucial during winemaking, especially for red wines like Cabernet Sauvignon.
• The Turpan region's unique climate presents specific challenges and opportunities for viticulture and enology.
• Understanding oxygen's impact on wine aging is key to optimizing quality.

Purpose of the Study:

• To investigate the effects of different oxygen concentrations on the quality of Cabernet Sauvignon dry red wine from the Turpan region.
• To determine the optimal oxygen level for improving wine flavor and sensory characteristics.
• To provide practical insights for winemaking in similar climatic conditions.

Main Methods:

• Physicochemical analysis to assess wine composition.
• Headspace solid-phase microextraction and gas chromatography-mass spectrometry (HS-SPME-GC-MS) for volatile compound analysis.
• Sensory evaluation to gauge consumer perception and overall quality.

Main Results:

• Oxygen regulation promoted phenolic polymerization, increased color intensity, and decreased total sulfur and anthocyanin content.
• Oxygen infusion reduced green and earthy notes, enhancing floral and nutty aromas, and positively influenced ethyl decanoate levels.
• An optimal oxygen concentration of 1 mL/L/month resulted in a more harmonious taste, fuller body, and superior sensory scores, without significantly affecting basic physicochemical indicators.

Conclusions:

• Controlled oxygen application is an effective strategy for enhancing the quality and sensory profile of Turpan Cabernet Sauvignon dry red wine.
• Optimal oxygen levels can mitigate negative sensory attributes and promote desirable aromatic complexity.
• The findings offer valuable theoretical and practical references for winemakers in regions with similar environmental conditions.