Tree growth, productivity and fruit size of 'Čačanska Lepotica' and 'Čačanska Najbolja' plums as influenced by rootstock
From the first to the tenth year after planting the impact of four rootstocks [Pixy, St. Julian A, Fereley and Myrobalan seedling (Prunus cerasifera Ehrh.)] on tree vigour (assesed as trunk cros sectional area), yield tree‑1 and unit area‑1, cumulative yield, yield efficiency, biennial bearing index and fruit weight of plum cultivars Čačanska Lepotica and Čačanska Najbolja under Čačak conditions (Serbia) were investigated. Trees were grown under high density planting system and spaced at 4.0×1.8 m (1,380 trees ha-1). Results showed that Myrobalan seedling induced the highest tree vigour of both evaluated cultivars whereas cultivars had the smalest trees on Pixy. Cultivars grafted on St. Julian A and Fereley had medium tree vigour. Individually, the most vigorous trees had Čačanska Najbolja grafted on Myrobalan seedling (106.40 cm2), while Čačanska Lepotica grafted on Pixy rootstock was vigourless (24.43 cm2). Čačanska Najboljaon Fereley had the highest, while Čačanska Lepotica on Pixy had the lowest cumulative yield. Biennial bearing index was significantly smaller in Čačanska Lepotica than in Čačanska Najbolja (0.27 and 0.37, respectively). Regarding rootstocks, values of biennial bearing index varied from 0.31 (St. Julian A and Fereley) to 0.37 (Pixy). Fruit weight of Čačanska Najbolja was significantly higher than Čačanska Lepotica. Both cultivars on Pixy gave smaller fruits in comparison with Myrobalan seedling, St. Julian A and Fereley with no significant differences among them.
Glišić, I.P., Milošević, T., Ilić, R., Paunović, G. and Mitrović, M. (2021). Tree growth, productivity and fruit size of 'Čačanska Lepotica' and 'Čačanska Najbolja' plums as influenced by rootstock. Acta Hortic. 1322, 147-154
cumulative yield, fruit weight, Prunus domestica L., tree vigour