Published in Scientific Papers. Series B, Horticulture, Vol. LXVIV, Issue 2
Written by Eleonora NISTOR, Alina DOBREI, Dragoş George CONSTANTINESCU, Gabriel CIORICA, Marcel DANCI, Simion ALDA, Alin DOBREI
The study was conducted between 2021 and 2023 and evaluated the influence of potassium on the quality of 'Victoria’ and 'Perla de Csaba’ table grapes. The samples were collected from a private vineyard in Masca, Arad County. Three doses of potassium (120, 130, and 140 kg/ha) were applied at three critical phenological stages (before flowering, pre-veraison, and post-harvest). The results indicated that the different potassium (K) doses significantly (p ≤ 0.05) influenced the grapes' quality. Notably, the dose of 130 kg (K) had a major impact on varieties, influencing sugar content, aromas, and berry size uniformity. The 140 kg/ha potassium dose increased the average bunch weight and significantly (p ≤ 0.05) decreased berry acidity, particularly in the 'Perla de Csaba’ variety. The study highlights the importance of balanced potassium fertilisation to improve key grape quality parameters, such as sugar content and bunch weight. The results suggest that adjusting potassium doses according to grape variety may optimise grape quality outcomes.
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