The study of irrigation influence on nutritional value of Lonicera kamtschatica - cultivar Gerda 25 and Lonicera edulis berries under the Nitra conditions during 2001-2003

Abstract

Two species of edible honeysuckle were studied in the trial established in the autumn 1994. The spacing used was 2.0 × 1.5 m and the experiment included irrigated as well as non- irrigated variants. The aim of this study was to provide a summary of nutritional values of <i>Lonicera kamtschatica</i> and <i>Lonicera edulis</i> berries under the Nitra conditions during the period 2001−2003. The berries were examined for the content of dry mater, sugar, organic acids, ascorbic acid, mineral substances − K, Ca, P, Mg, Na and anthocyanins from pomace and juice. The results of our experiments refer to the exceptionally high content of ascorbic acid ranging from 28.56 up to 86.96 mg/100 g, potassium 10,175 to 14,764 mg/kg and anthocyanins from pomace 6.245−17.36 g/kg. The values of ascorbic acid varied and they were statistically significantly depending on the year; similarly, only year can be taken into account as a statistically significant factor for forming content of sugar, magnesium and sodium. The content of dry mater, organic acids, potassium, calcium and anthocyanins in juice was influenced not only by year but also by species. The interaction species − year as a source of statistically significant differences is evident in the case of phosphorus and organic acids. A significant influence of irrigation on all evaluated nutrients was not confirmed.