Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 2
Written by Liana-Maria ROPAN, Raluca-Iuliana TRUŞCĂ (POPESCU), Nicolae GIUGEA, Alina-Mariana ȘIMON, Claudia-Adriana HORȘIA
Global warming and climate change are leading to disruptions in the viticultural ecosystem, with grapevine varieties having to modify their biological life cycle, in particular to adapt to a shorter growing season, with consequences for harvest quality. The study was carried out between 20 9 and 202 in the Jidvei wine-growing center, Târnave wine-growing region in Romania. The Fetească regală variety, the most cultivated white grape variety in Romania, was studied. The compounds in grape juice have a small amount of energy in their molecule, estimated using the heat of reaction. Their synthesis in a balanced relationship is with the climatic requirements of the biotope, the place where the vine grows and ripens, to which abiotic factors are added. In the first part it was necessary to evaluate the climatic resources. Also, the estimation of solar radiation was carried out with the help of the global radiation indicator and the coefficient of conversion of solar energy into chemical energy in life was calculated. In the second part, the grape variety Fetească regală was analyzed. The applied research methods were the ANOVA analysis and the Pearson method. Through the analysis of variance (ANOVA), the smallest significant differences - LSD - (5%, % and 0. %) were established for the parameters of grapes at full maturity: sugars and total acidity. The ANOVA analysis was also applied for the following parameters of young wine: alcohol concentration, reducing sugar, total acidity in tartaric acid, non-reducing dry extract. Using linear regression and correlation coefficient, several trends were established between global radiation and analyzed variables. It was found that global radiation and grape parameters (sugars and total acidity) were very strongly associated. Stability relationships between global radiation and several young wine parameters (alcoholic concentration, total acidity and non-reduced dry extract) also revealed very strong relationships. The limited data for only three years (20 9-202 ), revealed insignificant statistical correlations, but the linear relationships between several variables suggest continuing the study for more years.
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