Studies On The Influence Of Climate Conditions On The Quality Of Merlot Wines

To highlight the influence of the climatic conditions of the harvest year on the main biochemical parameters, and therefore on the quality of the red wines obtained from the Merlot variety, 4 wines obtained in the Dealu Mare region were analyzed, in 2013, 2014, 2015 and 2016. The climate of the studied years presented differences in temperature and precipitation, leading to different accumulations of sugars and phenolic compounds; climatic conditions also had an influence on the other quality parameters of the wines. The biochemistry analysis of the wines aimed: alcoholic strength (vol% alcohol), total acidity (g/L tartaric acid), volatile acidity (g/L acetic acid), total and reduced dry extract (g/L), glycerol content (g/L), the content in total and free SO2 (mg/L). The influence of climatic conditions on the chromatic characteristics ofMerlot wines was highlighted by spectrophotomefric analysis of the total content of polyphenols (A280), the total content of tannins (g/L), including tannin structure (gelatin index, HCl index and ethanol index, %), content in anthocyanins (mg/L) and coloring intensity.