Published in Scientific Papers. Series B, Horticulture, Vol. LXVII, Issue 2
Written by Dimitar VASILEV, Svetoslav MALCHEV, Lilyana NACHEVA
Studies have been conducted in the fruit tree nursery of Agricultural Experiment Station - Khan Krum between 20 3 and 20 6. Research subjects were the selected cherry rootstock hybrids 20- 8 and 20- 92 as clonal rootstocks grafted with cultivars Kossara, Trakiiska hrushtyalka and Van. Prunus mahaleb seedlings were used as a reference. The aim of the study was to investigate the growth characteristics, quality of planting material, and compatibility of the rootstocks with commercial cultivars. The average success rate of grafting reported in the autumn of the analyzed cultivar-rootstock combinations varied as follows: P. mahaleb (89-92%), hybrid 20- 92 (85-89%), and hybrid 20- 8 (8 -86%). The clonal rootstock 20- 92 induces relatively weaker growth than the Mahaleb. The weakest growth characterizes hybrid 20- 8 . Both tested rootstock hybrids, obtained by the crossing of 'Polevka’×'Compact Van’, produce planting material with standard trunk diameter and tree height.
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