Effects of Nitrogen Rates and Seed Inoculation with Plant Growth Promoting Rhizobacteria (PGPR) on Grain Weight Per Plant, Chlorophyll Content and Fertilizer Use Effeciency of Triticale

In order to study of nitrogen rates and seed inoculation with plant growth promoting rhizobacteria (PGPR) on grain weight per plant, chlorophyll content and fertilizer use effeciency of triticale, a factorial experiment was conducted based on randomized complete block design with three replications in research greenhouse University of Mohaghegh Ardabili in 2011. Factors were: nitrogen fertilizer rates (0, 80,160 and 240 kg N ha-1) as urea and seed inoculation with PGPR containing, (without inoculation as control, seed inoculation with Azospirillum lipoferum strain OF, Psedomunas putida strains 41 and 9. Results indicated that nitrogen rates and seed inoculation with PGPR had significant effects on grain weight, number of grains per spike, spike length, grain 100 weight, harvest index and grain protein percentage and the other traits. Increasing N fertilization increased grain protein percentage. Maximum of grain protein was obtained in seed inoculation with Psedomunas strain 9.Means comparison of seed inoculation with PGPR× nitrogen rates showed that grain weight at seed inculation with Azospirillum lipoferum× 160 kg N ha-1 was more than application of 240 kg N ha-1× no seed inoculation. Maximum of nitrogen use efficiency was obtained at application of 80 kg N ha-1 in seed inoculation with Azospirillum lipoferum. It seems that in order to increasing of grain weight per plant, and some agronomic traits can be suggested that seed inoculation of triticale be applied with Azospirillum lipoferum× application of 160 kg N ha-1.