The Effects of Rootstocks and Training Systems on the Early Performance of â€˜0900 Ziraatâ€™ Sweet Cherry
The effects of three rootstocks (â€˜Gisela 5â€™, â€˜Gisela 6â€™ and â€˜MaxMa 14â€™) and three training systems (Spanish bush, Steep leader and Vogel central leader) on early performance of â€˜0900 Ziraatâ€™ sweet cherry were compared. There have been significant differences among both rootstocks and training systems in terms of tree heights. At the end of the fourth year, while the height of the trees grafted on â€˜Gisela 5â€™ was 238.3 cm, those grafted on â€˜MaxMa 14â€™ reached 266.4 cm in height. While the shortest tree height was obtained from Spanish bush system, heights of the trees in Steep leader and Vogel central leader training systems were found to be at similar levels. â€˜Giselaâ€™ 5 had lower trunk cross section area (TCSA) than â€˜Gisela 6â€™ and â€˜MaxMa 14â€™ rootstocks. Among three systems, trees trained to Steep leader had the highest TCSA, followed by Spanish bush and Vogel central leader. Interactions were found between rootstock and training system for yield and yield efficiency. On â€˜Gisela 6â€™, cumulative yield of Vogel central leader system (17.0 g/tree) was significantly higher than Spanish bush (14.8 g/tree) and Steep leader (12.6 g/tree). On the other hand, on â€˜MaxMa 14â€™, there were not significant differences in cumulative yield per tree among training systems. On â€˜Gisela 5â€™ and â€˜Gisela 6â€™, the highest yield efficiency were observed in trees trained as Vogel central leader. Yield efficiency of Vogel central leader (0.49 kg cm-Â²) was two time higher than those of Spanish bush (0.29 kg cm-Â²) and Steep leader (0.26 kg cm-Â²) on â€˜Gisela 6â€™. The weight of fruits from trees grafted on â€˜Gisela 5â€™ was lower than those from trees on â€˜Gisela 6â€™ and â€˜MaxMa 14â€™. In the fourth year, while the average fruit weight was 5.86 g on â€˜Gisela 5â€™, it was 6.00 and 6.25 g on â€˜Gisela 6â€™ and â€˜MaxMa 14â€™ rootstocks respectively.
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