Growth and productivity of early and medium late maturing plum cultivars in the Belgrade area
Characteristics of growth and cropping (trunk cross-sectional area, yield tree‑1, yield efficiency and biennial bearing index), as well as fruit weight were studied in 26 plum cultivars of early and medium late maturity time in the Belgrade area during an eight-year period (2012-2019). The cultivar Čačanska Lepotica was used as a control for comparison. The period of study was divided to initial bearing (age of trees four and five years) and full bearing (age of trees from six to eleven years). Significant differences in yield among cultivars were found in both initial and full bearing periods. Average yield tree‑1 in the period of initial bearing ranged from 1.0 kg in Vengerka Yubileynaya to 8.2 kg in Valerija, and in the period of full bearing from 9.1 kg in Venera to 28.1 kg in Delikatnaya. Compared with the control cultivar, significantly lower yield in the full bearing was obtained in 17 cultivars. Trunk cross-sectional area was significantly higher in five cultivars, and lower only in one cultivar (Valerija). Cumulative yield efficiency varied from 0.36 kg cm‑2 in Venera to 1.96 kg cm‑2 in Valerija. Biennial bearing index was the lowest (0.14-0.16) in cultivars Čačanska Najbolja and Čačanska Rana, and the highest (0.63-0.66) in cultivars Delikatnaya and Green Gage. Fruit weight ranged from 22.9 g in Katinka to 67.7 g in Reeves. Compared with control, fruit weight was significantly higher in seven cultivars, and significantly lower also in seven cultivars. On the basis of high yield and large fruit size, cultivars Valor, Reeves, Čačanska Najbolja and Valerija are distinguished.
Milatović, D., Zec, G., Đurović, D. and Boškov, Đ. (2021). Growth and productivity of early and medium late maturing plum cultivars in the Belgrade area. Acta Hortic. 1322, 83-88
Prunus domestica, cropping, trunk cross-sectional area, yield efficiency, biennial bearing index, fruit weight