Evaluation of biological fertilizers Azotobacter and Azospirillum along with manure application on agronomic traits of maize (Zea mays L.) KSC647

Bio fertilizers contain a sufficient number of one or more species of beneficial microorganisms and nutrients from the soil are able to convert unused usable form. In order to evaluate the effect of manure into bio-fertilizer and seed inoculation with nitrogen-fixing on agronomic traits of grain corn KSC647 cultivars, factorial experiment in a randomized complete block design with four replications was conducted during 2012-2013 in the College of Agriculture, Islamic Azad University of Varamin. The first factor manure: M1: to use 30 tons of manure per hectare of manure and M2: Non-application of manure, Second factor biofertilizers Azotobacter strains (Azotobacter chroococcum): Az1: seed inoculation with Azotobacter and Az0: non-inoculated seed with Azotobacter and the third factor bio-fertilizers Azospirillum strains (Azosprillum brasilense): As1: seed inoculation with Azospirillum and As0: non-inoculated seed with Azospirillum biofertilizer. The results showed that the highest grain yield, biological yield, grain weight, harvest index, number of seed per ear from animal manure and seed inoculation treatments combined with Azotobacter and Azospirillum was obtained. Specify the use of bio-fertilizers with manure saves 50% of the nitrogen fertilizer. It seems that excess nitrogen from manure improves the vegetative growth at the beginning and in the middle of nitrogen-fixing bacteria able to stabilize the soil nitrogen available to the plants. Synergy of these two factors has led to the growth of nitrogen in the plants, and thus achieved the highest yield.