Effect of 'Gutingen V' as an intensive training system on agromorphological characters of some apple cultivars in Karaj region of Iran

摘要

V-shape systems represent an efficient and popular option to increase yields and fruit quality in fruit trees. Hence, this paper attempts to compare some vegetative and yield characteristics of five apple cultivars grown at horticultural research station in Karaj, Iran. The selected apple cultivars were included: 'Golab-kohans' (Iranian cultivar), 'Fuji', 'Gala', 'Starking' and 'Delbar estival' (commercial foreign cultivars) that were grafted on M.9 rootstock which were trained in a V system. All of these trees were planted in winter 2005. The time of irrigation started from the second experimental year after planting and the method of irrigation was drip irrigation system. Results showed that the 'Golab-kohans' had the most tree height (278.63 cm), trunk cross sectional area (7.308 cm2) and mean shoot length (100.58 cm). Also 'Delbar estival' had the most yield (0.98 kg), yield efficiency (0.550 kg/cm2). Consistently, Results revealed that among the investigated cultivars, 'Delbar estival' can be introduced as a prone and productive cultivar for V system in Karaj's climatic conditions.