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vol. 11, nr. 1 (2008)
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Influence of mineral fertilization on selected physical features and chemical compo-sition of aronia fruit
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Katarzyna Skupień1, Ireneusz Ochmian2, Józef Grajkowski2
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1 Laboratory of Plant Raw Materials Processing and Storage, Agricultural University, ul. Słowackiego 17, 71-434 Szczecin |
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2 Department of Pomology, Agricultural University, ul. Janosika 8, 71-424 Szczecin |
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vol. 11 (2008), nr. 1,
pp. 213-226
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abstract:
Aronia melanocarpa (Michx) Elliot, called also black chokeberry, is a species with lower cultivation requirements within the Rosaceae family. The purpose of the study was to assess the influence of foliar fertilization with Mn, ‘Alkalin’ (N, K and Si) and Mn + ‘Alkalin’ on physical features and chemical composition of chokeberries. All fertilizers applied exerted stimulating effect on weight of 100 fruits and fruit size, however, the lowest yield was observed for Mn treated bushes. Fertilization with ‘Alkalin’ significantly increased firmness of fruit in comparison to control and other treatments. However, neither Mn nor ‘Alkalin’, nor the combined fertilization increased total sugar content in chokeberries. On the other hand, fruits of the combined treatment showed the highest saccharose content. The treatment did not affect titratable acidity, soluble solids, nitrate and total polyphenol content. The control berries and fruit of Mn treated plants had significantly higher ability of scavenging DPPH radical compared to that of ‘Alkalin’ and combined fertiliza-tion. The tested fertilizers exerted multi-directional changes in physical properties and chemical composition of chokeberries. However, the differences observed between fruit of fertilized variants and control, even when statistically significant, from the practical point of view were not very high.
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keywords:
Aronia melanocarpa, yield, firmness, juice extraction efficiency, phytonutrients
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original in:
English
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