Jakość owoców pięciu odmian persymony (Diospyros kaki)

Abstract

Research was conducted in 2010–2011 at the Fruit Growing Department of the West Pomeranian University of Technology in Szczecin and at the Research Station of Agricultural University in Plovdiv, where, in the spring of 2006, persimmon trees of ‘Sharon’, ‘Moro’, ‘Jiro C24276’, ‘Kaki Tipo’ and ‘Hyakume’ cultivars were planted. The capacity of the fruits, soluble solids, organic acidity, Vitamin C, NO3 and NO2 contents as well as the fruit coloring were compared in Szczecin after harvesting. It was noted that Kaki Tipo and Hyakume cultivars were characterized by the largest fruits with an average mass greater than 220 g, and with a height and diameter 70 mm. The fruits were characterized by a wide range of skin colour: from bright yellow-orange to dark orange. The fruits of the ‘Hyakume’ cultivar were the brightest (L* 63.19) and contained the most yellow pigment (b* 63.54). Small contents of organic acids (0.37–0.67 g citric acid per 100 g of fruit), nitrates (1.0–4.5 mg 100 g–1) and a nitrites (0.15–0.30 mg 100 g–1). Fruits were characterised by large differences in vitamin C content from 41mg (‘Hyakume’) to 98 mg (‘Sharon’) per 100 g of fruit but similar values for the content of extract (16.6–17.4%).