Growth reduction effect and fruit quality of plum cultivars on rootstocks 'Krymsk®1' and 'Krymsk®2' after five years of cultivation
The influence of rootstocks Krymsk®1 (Prunus tomentosa × Prunus cerasifera) and Krymsk®2 (Prunus incana × Prunus tomentosa) on growth (trunk cross-sectional area − TCSA, tree canopy volume) and fruit quality parameters (fruit weight, height, firmness and soluble solids content − SSC) was compared with rootstock Mr.S. 2/5 (Prunus cerasifera × Prunus spinosa). Tree vigour and fruit quality of four plum cultivars (Čačanska Lepotica, Elena, Hanita and Tophit) were evaluated in Holovousy (Czech Republic) in the experimental plum orchard after five growing seasons. Statistical analyses were carried out by Statistica software (version 12, Stat Soft). The growth (TCSA and tree crown volume) was significantly lower on Krymsk®1 and Krymsk®2 in comparison with Mr.S. 2/5. No significant differences in fruit weight were recorded (Krymsk®1 26.5 g; Krymsk®2 24.8 g and Mr.S. 2/5 25.2 g). Fruit firmness was significantly higher on rootstock Mr.S. 2/5 (index 73.7) in comparison with Krymsk®1 (index 70.0) and Krymsk®2 (index 71.0). SSC was the highest in Krymsk®2 (19.8 °Brix) and lower in Krymsk®1 and MRS 2/5 (19.3 °Brix). Some differences were recorded between the cultivars. Tree size-controlling rootstocks for plums provide a great boost in production efficiency suitable for growing conditions in central Europe.
Jonáš, M., Kadlecová, V. and Vávra, R. (2021). Growth reduction effect and fruit quality of plum cultivars on rootstocks 'Krymsk®1' and 'Krymsk®2' after five years of cultivation. Acta Hortic. 1322, 171-178
TCSA, plums, dwarfing rootstocks, fruit size, tree vigour