Effect of nitrogen fixation and solubilizing phosphate inoculation on yield and nitrogen uptake indices of barley (Hordeum vulgare L.) under different levels of nitrogen

This experiment was designed in order to the effect of Nitrogen fixation and solubilizing phosphate inoculation on yield and Nitrogen uptake indices of barley(Hordeum vulgare L.) under different levels of NitrogenThe trial field was located on field research Islamic Azad University, Karaj Branch.Three factors included Azospirillum inoculation; at two levels (with and without inoculation) pseudomonas inoculation, at two levels (with and without inoculation) and Nitrogen fertilization at four levels(N0%=0 kgN.ha-1 N50%=150 kgN.ha-1, N75%=225 kgN.ha-1, N100% =300 kgN.ha-1) have been studied in spilit - plot factorial experiment. Based on randomized complete block design.The results showed that levels of different nitrogen and Azospirillum and Pseudomonas inoculation each of alone on grain yield, straw yield, Nitrogen yield, grain nitrogen and total uptake nitrogen had significant. And intraction effect Azospirillum and Pseudomonas just on grain yield and straw yield had significantly at 1%, 5%. on base of results of this study Azospirillum and 225kgN.ha-1 application together despite deacresing 25% chemical nitrogen, increased grain yield (7950 kg.ha-1) by 30.3 and inoculation each of bacteria alone or with levels of different nitrogen on the most quality and quantity adjective in this study was significant.