Inoculation of nonsymbiotic azotobacteria BC2 to Agropyrom cristatum

An experiment was conducted to determine the effect of inoculation of nonsymbiotic azotobacteria BC2 isolating from wheatgrass (Agropyrom cristatum) on the growth and fixing nitrogen. The results of this study showed that BC2 inoculation increased the dry weight of wheatgrass and nitrogenfixing capability with 42.55 mg/kg in the entire system when compared to the control. The effectiveness of inoculation was better due to soil sterilization and the total nitrogen content of sterilized soil with 80.95 mg/kg was twice of the unsterilized soil. This study also showed that BC2 inoculation improved the N fixation efficiency via increasing the soil carbon source.