INFLUENCE OF VARIETY AND LOCATION ON UNSHIU CITRUS FRUIT WEIGHT (Citrus unshiu March.)

A study on three most common varieties of Unshiu mandarin in Montenegro s coast (Chahara, Kawano Wase and Owari) was conducted in three locations in the Municipality of Bar: Šušanj, Bjeliši and Polje in the course of 2010. All three varieties were grafted on the rootstock Poncirus trifoliata. During the study, all trees were in the full fruiting period. Standard agricultural operations were conducted in the course of the study (tilling, fertilizing, irrigation and protection against disease agents and pests). In all mandarin varieties in this study the fruit weight was analysed. Of each variety 90 fruits were taken for analysis (30 fruits from each tree from Šušanj, Bjeliši and Polje, taken in line with a representative sample method). The total of 270 fruits was weighted. In all varieties studied, the fruit weight was measured on an automated analytical balance of the Shimadzu brand, with accuracy of 0.001 mg. The results of the study on the influence of the variety and the location on Unshiu mandarin (Owari, Kawano Wase and Chahara) show the following: variety Owari has the highest average fruit weight of 107.96 grams, and the lowest variety Kawano Wase with 69.98 grams. The highest average fruit weight of the varieties studied was found in the location Polje 93.91 g, and the lowest in the location Bjeliši 85.14 g. The results of the study show that the fruit weight depends on the variety and that the influence of the location to fruit weight is not significant.