Biological and Pomological Properties of Autochthonous Plum Cultivars in Agroecological Conditions of Čačak

Abstract

This study was carried out to determine basic biological and pomological traits of eight ex situ autochthonous plum cultivars (‘Belošljiva Ljubić’, ‘Bugarka’, ‘Cerovački piskavac’, ‘Crnošljiva’, ‘Crvena ranka’, ‘Dragačevka’, ‘Papračanka’ and ‘Petrovača’) during two consecutive years (2015 and 2016). Examination included investigation of the main phenological properties (flowering and ripening time), morphometrical (fruit and stone weight and flesh percentage) and sensorial properties of fruit (fruit scin and flesh colour, flesh firmness and stone adherence), as well as vigour (trunk cross sectional area) and cropping potential (yield per tree and yield efficiency). Studied plum cultivars flowered from the end of the first to the mid of the third decade of April and ripened during the third decade of July and the first and the second decade of August. The highest vigour and yield per tree was found in cultivar ‘Dragačevka’, while the highest yield efficiency was observed in cultivar ‘Cerovački piskavac’. Cultivar ‘Belošljiva Ljubić’ had the highest values of fruit and stone weight. The highest velue of flesh percentage was observed in cultivar ‘Dragačevka’. Dark-blue fruit skin colour was dominant, while flesh colour varied from yellowish green to yellow. Flesh was medium firm to firm and non adherent, semi adherent or adherent to the stone.

Ispitivanja obuhvaćena ovim radom su sprovedena sa ciljem determinacije najvažnijih biološko-pomoloških osobina osam autohtonih sorti šljive (Belošljiva Ljubić, Bugarka, Cerovački piskavac, Crnošljiva, Crvena ranka, Dragačevka, Papračanka i Petrovača) u ex situ uslovima tokom 2015. i 2016. godine. Proučavane su najznačajnije fenološke osobine (fenofaze cvetanja i sazrevanja plodova), morfometrijske (masa ploda i koštice, randman mezokarpa ploda) i senzorne osobine ploda (boja pokožice i mezokarpa ploda, čvrstina mezokarpa i stepen prijanjanja koštice), kao i bujnost (površina poprečnog preseka debla) i rodnost (prinos po stablu i koeficijent rodnosti). Proučavani genotipovi šljive su cvetali od kraja prve do sredine treće dekade aprila, a sazrevali tokom treće dekade jula i prve i druge dekade avgusta. Najvećom bujnošću i najvišim prinosom po stablu se odlikovala sorta Dragačevka, dok je najviši indeks rodnosti utvrđen kod sorte Cerovački piskavac. Najveća masa ploda i koštice su utvrđene kod sorte Belošljiva Ljubić, a najveći randman mezokarpa ploda kod sorte Dragačevka. Dominirala je tamno plava boja pokožice ploda. Mezokarp ploda je bio žute ili žuto-zelene boje, srednje čvrst do čvrst, dok je koštica bila slobodna, delimično slobodna ili je u potpunosti prijanjala za mezokarp ploda.