تاثیر تاریخ کاشت بر عملکرد و اجزای عملکرد پنج رقم جو دیم در منطقه همدان

The aim of this research was to study the effect of sowing dates of 6 Oct., 5 Nov. and 5 Dec., 2012 treatments, respectively, on yield and yield components of five barely cultivars (Mahally as a control Abidar Valfagr Bahman and Makoyei). A factorial experiment was done based on randomized complete block design with three replications at the Agricultural Research Station of Bu- Ali Sina University. Results showed that sowing date treatment had significant effects on all traits. Maximum grain yield (420.82 g m-2) was attained at 6 Oct treatment. 5 Dec treatment in comparison with 6 Oct treatment decreased grain yield up to 46.5%. At the late sowing date due to exposure of plants with heat and drought of late season, grain yield of barley decreased. Between barley cultivars for traits of grain yield was different significant. Valfagr cultivar with average of 382.83 g m-2, produced the highest value of grain yield and this coutivar had significant difference with other cultivars. The interaction of sowing date × cultivar was significant only for grain number spike-1. In this study the most suitable sowing date and barley cultivar for Hamadan region was determine sowing date of 6 Oct. and Valfajr cultivar.