عبدالعلی حسامی

Abstract In this study, effect of three training systems including T-bar, as a common training system, Modified TY shape (MTY) and Y- shape (Y) on yield and fruit quality of kiwifruit vine cv. Hayward was investigated. This experiment was carried out in a randomized complete design with three replications in the Hourticultural Research Orchard of University of Guilan in Rasht in 2012. Traits such as yield per vine, fruit tissue firmness, total soluble solids (TSS), titrable acidity (TA), TSS/TA ratio, vitamin C, total phenol and extract antioxidant capacity of fruits at harvest time were evaluated. The results showed that kiwifruit vines trained by Y system had the highest yield, TSS, TA, TSS/TA ratio, vitamin C, total phenol and extract antioxidant capacity of fruits. Fruits tissue firmness and TA were not affected by training systems. Overall, the results showed that Y training system could be favorable system instead of T-bar system for kiwifruit in Rasht climate conditions. Keywords: fruit quality, Actinidia deliciosa, training system and yield.