Pomological properties of primocane fruiting raspberry cultivars grown in the Belgrade region

Abstract

During 2006-2007, studies were conducted at the Experimental farm 'Radmilovac', a collective raspberry plantation of the Faculty of Agriculture, Belgrade University. The experiment included four primocane fruiting raspberry cultivars: Autumn Bliss, Ljuljin, Polana and Polka. The ripening time and important physical (fruit weight, fruit dimension, fruit shape index and number of drupelets per fruit), chemical (soluble solids content, sugar content and total acids content) and organoleptic fruit properties were studied. In both studied years, cv. Autumn Bliss expressed the earliest ripening time with average date of 29th Jun. The latest harvest time was recorded in cv Ljuljin (12th July) as well as the shortest harvesting season (71 days). Fruit weight ranged from 2.32 g (Autumn Bliss) to 2.85 g (Polana), whereas the values of fruit shape index were lower than 1.00 in the most of studied cultivars. Cv Polana had the best physical fruit properties, but the least favourable chemical fruit composition, based on lower soluble solids and sugars content, was also recorded. Based on the most of studied parameters, cvs Polka, Polana and Autumn Bliss can be recommended for commercial off-season raspberry production in the region of Belgrade. However, cv Autumn Bliss is only recommended because of earliness, which can provide extend of market supply with fresh raspberry fruits after the end of floricane raspberry harvesting.

Rad prikazuje rezultate pomoloških ispitivanja četiri remontantne sorte crvene maline (Autumn Bliss, Ljuljin, Polana i Polka). Ispitivanja su vršena u kolekcionom zasadu maline na OD 'Radmilovac' Poljoprivrednog fakulteta iz Beograda, u periodu 2006-2007. godina. Zasad je zasnovan 2005. godine po sistemu pantljike širine 60 cm, bez naslona. Na osnovu dobijenih rezultata većine ispitivanih parametara, za vansezonsko komercijalno gajenje maline u uslovima gročansko-smederevskog Podunavlja mogu se preporučiti sorte Polka, Polana i Autumn Bliss, sa napomenom da se sorta Autumn Bliss preporučuje isključivo zbog ranog vremena zrenja dok je senzorički kvalitet ploda poražavajući.