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THE EFFECT OF FOLIAR APPLICATION WITH ORGANIC AND INORGANIC PRODUCTS ON THE BIOCHEMICAL QUALITY INDICATORS OF HIGHBUSH BLUEBERRY (VACCINIUM CORYMBOSUM L.)

Published in Scientific Papers. Series B, Horticulture, Vol. LXV, Issue 1
Written by Mihaela CIUCU-PARASCHIV, Dorel HOZA

Foliar fertilization is applied quite frequently in combination with soil fertilization. The objective of this study was to evaluate the influence of two foliar organic fertilizers and one chemical on the biochemical quality of fruit of highbush blueberry (Vaccinium corymbosum L.). The experiment was performed on a farm in the meadow Argeș, in 2020 on a three-year plantation and was presented in a randomized block design, with three repetitions and four fertilization treatments:control (untreated), Poly-Feed 19–19–19 + ME (10 kg/ha), Algacifo 3000 (2 L/ha) and ERT 23 Plus (1 L/ha), repeated four times at every 10-14 days, from the formation of the bud to the beginning of fruit ripening. The blueberry varieties studied were: 'Blueray’, 'Duke’, 'Elliott’ and 'Hannah’s Choice’. Data were recorded on the following biochemical quality indicators: total dry matter content, soluble dry matter, total titratable acidity, sugar content, vitamin C, total anthocyanin content and polyphenols. The study showed that organic fertilizers had a superior effect on the biochemical quality of the fruit than the chemical one.

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