Articles
The evolution of the main climatic factors in 2014-2023 period and their influence on grape production in the Murfatlar wine growing center
Article number
1418_37
Pages
295 – 302
Language
English
Abstract
Among the factors that influence the favorability of a vineyard, the climatic ones become more and more expressive, causing changes in the manifestation of the biological potential of the grapevine cultivars.
The study carried out in Murfatlar in the period 2014-2023 revealed changes in the thermal values consisting of increases in the average annual temperature by 2.1°C and in the vegetation period by 1.7°C compared to the multi-year average recorded in the period of reference, 1984-2013 interval.
There is an increase in the annual frequency of days with maximums >30.0°C, a decrease in the frequency of winter days (maximum of the day <0.0°C), an increase in maximum temperatures both in winter and in summer.
The amount of annual precipitation is reduced by 60.6 mm on average, and a change in their distribution is noted, especially during the growing season.
The combined effect of climatic factors, expressed with the help of synthetic indicators calculated for the study period, describes a climate with sufficient heliothermal resources (the average value of the viticultural bioclimatic index (Ibcv) was 13.4) but with a water deficit (the average value of the hydrothermal coefficient (CH) was 0.7 compared to 0.93 the previous average value). These climate changes have led to changes in the development of the phenophases, the current study presenting the evolution of 4 representative cultivars for the vineyard, two for white wines, ‘Fetească regală’ and ‘Columna’, and two for red wines, ‘Fetească neagră’ and ‘Mamaia’. An early ripening of the cultivars is recorded, the harvest being carried out 5 to 7 days earlier for the white and red cultivars, respectively simultaneously with an increase in the concentration of sugars in the must, reaching values of 230-240 g L-1 correlated with a decrease in total acidity.
The study carried out in Murfatlar in the period 2014-2023 revealed changes in the thermal values consisting of increases in the average annual temperature by 2.1°C and in the vegetation period by 1.7°C compared to the multi-year average recorded in the period of reference, 1984-2013 interval.
There is an increase in the annual frequency of days with maximums >30.0°C, a decrease in the frequency of winter days (maximum of the day <0.0°C), an increase in maximum temperatures both in winter and in summer.
The amount of annual precipitation is reduced by 60.6 mm on average, and a change in their distribution is noted, especially during the growing season.
The combined effect of climatic factors, expressed with the help of synthetic indicators calculated for the study period, describes a climate with sufficient heliothermal resources (the average value of the viticultural bioclimatic index (Ibcv) was 13.4) but with a water deficit (the average value of the hydrothermal coefficient (CH) was 0.7 compared to 0.93 the previous average value). These climate changes have led to changes in the development of the phenophases, the current study presenting the evolution of 4 representative cultivars for the vineyard, two for white wines, ‘Fetească regală’ and ‘Columna’, and two for red wines, ‘Fetească neagră’ and ‘Mamaia’. An early ripening of the cultivars is recorded, the harvest being carried out 5 to 7 days earlier for the white and red cultivars, respectively simultaneously with an increase in the concentration of sugars in the must, reaching values of 230-240 g L-1 correlated with a decrease in total acidity.
Publication
Authors
I. Dina, A. Ranca, S.A. Ene, V. Artem
Keywords
heliothermal resources, water deficit, synthetic climate indices, ripening cultivars, grape quality
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