Present work was conducted to evaluate the inoculation effects of plant growth promoting bacteria (PGPR) and nitrogen on rate and effective seed filling period on LB-IRAN cultivar of barley. It was done in the year of 2011 growing season in growth chamber of agriculture faculty of Mohaghegh Ardabili University. It factorial experiment on the base of randomized block design. Experimented factors were nitrogen fertilizer in four levels (0, 60, 120, 180 kg per hectare) as an urea source and seed biopriming with PGPR in four levels conclude (no inoculation, inoculation with Azotobacter chroococcum strain 5, Azospirillum lipoferum strain OF and Psedomunas strain 186). Results showed that between studied treatment combinations of seed inoculation with growth promoter bacteria and different levels of nitrogen fertilizer, there are differences in effective seed filling period, maximum seed weight and the length of seed filling period. In all treatments maximum seed weight, seed filling duration and seed yield observed in inoculation with Azospirillum and highest nitrogen level and minimum one was non-inoculation and without nitrogen consumption.

barley, growth promoter bacteria, seed filling duration and rate

Presentation: oral