EFFECT OF IBA CONCENTRATION ON THE QUALITY OF ROOTING CUTTINGS OLIVE (Olea europaea L.) CULTIVARS ISTARSKA BJELICA AND ROSULJA ON THE ISLAND OF KRK

Udomaćene sorte maslina (Olea europaea L.) Istarska bjelica i Rosulja zbog dobrih gospodarskih karakteristika sve se više šire kroz podizanje mladih maslinika na otoku Krku. Dosadašnja iskustva u ukorjenjivanju reznica ovih sorata s ciljem proizvodnje sadnica govore o velikom nedostatku klasičnog postupka zbog veoma niskog postotka ukorijenjenih reznica. Cilj ovog rada bio je istražiti kvalitetu ukorjenjivanja reznica sorti Istarska bjelica i Rosulja (uzorkovanih u masliniku blizu mjesta Šilo na otoku Krku) tretiranih koncentracijama IBA–e od: 2.000, 3.000, 4.000 i 5.000 p.p.m. Rezultati istraživanja pokazuju najveći postotak ukorijenjenih reznica kod obiju sorti kod koncentracije od 5.000 p.p.m., a najmanji kod kontrolne varijante. Sorta Istarska bjelica imala je kod kontrolne varijante i koncentracije od 5.000 p.p.m. niži postotak ukorijenjenih reznica u odnosu na sortu Rosulju.Local olive varieties Istarska bjelica and Rosulja because of good economic characteristics are increasingly spreading through the raising of young olive groves on the island of Krk. Previous experience show very poor rooting cuttings of these varieties to the production of olive plants. The aim of this study was to investigate the quality of rooting cuttings of varieties Istarska bjelica i Rosulja with different concentrations of IBA. The results show the highest percentage of rooted cuttings of both cultivars at concentrations of 5.000 p.p.m. and the lowest in the control variants. Cultivar Istarska bjelica had a lower percentage of rooted cuttings in the control variants and in the concentration of 5.000 p.p.m