Organic acid, ascorbic acid and sugar content of arctic bramble depending on variety and its cultivation place
2000
Starast, M. | Karp, K. | Pae, A. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Horticulture)
Organic acids (expressed as citric acid), ascorbic acid and sugars of frozen arctic bramble berries were analysed in the winters of 1996, 1997 and 1998. The Estonian natural arctic bramble under the name Kaansoo was included. The berries from three different growing places were analysed in the experiment. Two experiments were located on production fields, and the growing method with plastic mulch was used there. In Tartu the experimental field lay in the experimental garden of Department of Horticulture of the Estonian Agricultural University. Growing without plastic mulch was used there. The fruit quality characteristics were determined in 1997 and 1998. The organic acid content of arctic bramble and its hybrid berries, expressed as citric, was 0.19...0.29 per cent. The organic acid content was highest in the arctic bramble hybrid varieties 'Astra' and 'Aura'. The average ascorbic acid content in berries was 19.0...25.2 m per cent. The content of sugars was 4.9...5.8 per cent. The varieties 'Astra' and 'Aura' had lowest sugar content. The berries of Estonian natural arctic bramble clone are not essentially different from well-known arctic bramble cultivars in Finland
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