Articles
The impact of climatic conditions on the phenology and physiology of some sweet cherry cultivars from the north-east of Romania
Article number
1457_22
Pages
169 – 176
Language
English
Abstract
The sweet cherry (Prunus avium L.) is a tree species widely distributed throughout the world, fully adapted to the climatic conditions of mid-latitudes and specific to the temperate climate zone, known primarily for its distinctive qualities of the fruit.
The study was conducted over two consecutive years (2022-2023) using three cultivars (‘Van’, ‘Andreiaș’, and ‘Margonia’) from the Romanian sweet cherry collection at the Research Station for Fruit Growing (RSFG) in Iaşi, Romania, as biological material.
The effect of climatic parameters on phenology was studied by recording phenological data according to the BBCH scales (Biologische Bundesanstalt, Bundessortenamt and Chemical Industry): 65 (full flowering); 78 (fruits approximately 80% of final size) and 89 (fruit ripening), by determining the heat requirement by calculating the sum of active temperature (SAT) and growing degree-days (GDD) and the light intensity (lux) in the studied period.
The evaluation of physiological processes is of great importance for the improvement of the phenological models of the sweet cherry crop, which is why the content of chlorophyll pigments of the leaves from two different areas of the crown (internal and external) was also studied.
The Duncan’s test (p≤0.05) and the Pearson correlation coefficient were used for the statistical analysis.
The analyzed indices demonstrated a high degree of variability due to the climatic conditions of the studied years (2022-2023), in which average values of 11.4°C, the annual average temperature, +1.7°C more than the multiannual average (2000-2020) and total precipitation of 440 mm were recorded, with a deficit of -77.5 mm compared to the multiannual values causing significant statistical differences between the results obtained.
The study was conducted over two consecutive years (2022-2023) using three cultivars (‘Van’, ‘Andreiaș’, and ‘Margonia’) from the Romanian sweet cherry collection at the Research Station for Fruit Growing (RSFG) in Iaşi, Romania, as biological material.
The effect of climatic parameters on phenology was studied by recording phenological data according to the BBCH scales (Biologische Bundesanstalt, Bundessortenamt and Chemical Industry): 65 (full flowering); 78 (fruits approximately 80% of final size) and 89 (fruit ripening), by determining the heat requirement by calculating the sum of active temperature (SAT) and growing degree-days (GDD) and the light intensity (lux) in the studied period.
The evaluation of physiological processes is of great importance for the improvement of the phenological models of the sweet cherry crop, which is why the content of chlorophyll pigments of the leaves from two different areas of the crown (internal and external) was also studied.
The Duncan’s test (p≤0.05) and the Pearson correlation coefficient were used for the statistical analysis.
The analyzed indices demonstrated a high degree of variability due to the climatic conditions of the studied years (2022-2023), in which average values of 11.4°C, the annual average temperature, +1.7°C more than the multiannual average (2000-2020) and total precipitation of 440 mm were recorded, with a deficit of -77.5 mm compared to the multiannual values causing significant statistical differences between the results obtained.
Publication
Authors
I. Perju, I. Mineață, S. Sîrbu, I.E. Golache, I.V. Ungureanu, E. Iurea, C.D. Jităreanu
Keywords
climate, chlorophyll pigments, leaves, phenological phases, sweet cherry
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