The results of a research on specific qualitative features of berries of the large cranberry cultivars ‘Ben Lear’, ‘Pilgrim’, ‘Searles’ and ‘Stevens’ grown on the artificially prepared peat solum obtained from highmoor peatbog in the conditions of north-eastern part of Poland (Olsztyn) are presented. The following features were examined: the mass of 100 berries, dry matter content, the content of saccharides, the content of organic acids and pectins. The highest mass of berries was found in cv. ‘Stevens’ and the lowest in cv. ‘Searles’. Application of nitrogen and potassium (10 kg/ha) increased the mass of berries. The content of dry matter varied depending on cultivars and nutrition. The highest content of dry matter and sugars was found in berries of cv. ‘Searles’. Higher doses of fertilizers reduced the content of dry matter. The highest content of acids was found in berries of cv. ‘Ben Lear’ and the lowest in berries of cv. ‘Searles’. Higher dozes of N and K increased the content of acids in berries. Berries of cv. ‘Pilgrim’ contained the highest levels of pectins. Higher doses of nitrogen and potassium fertilizers had a positive effect on pectin accumulation.

Raktažodžiai: large cranberry, nutrition, cultivars, mass of berries, dry matter, total sugars, acids, pertins