Effect of Nitrogen Biofertilizers on Yield and Yield Components of Different Maize (Zea mays L.) Cultivars

In order to evaluate the effect of nitrogen bio-fertilizers on yield and yield and yield components of different maize (zea mays L.) cultivars a field experiment was conducted in Islamic Azad University of Boroujerd, Iran (at Isfahan region), during the growing seasons 2013- 2014. The experiment was laid out in a split-plot design based on randomized block design with three replications. Treatments were different cultivars (Siloking, NS4015, Maxima and SC704) in main plots and nitrogen bio-fertilizers (Azotobacter, Nitroxin and Supernitroplus) with control in sub plots. The results reviled that the effect of cultivar treatmenton all traits was significant. Effect of N bio-fertilizer treatment was significant on stem weight, leaf weight, ear weight and biomass yield only. Interaction effect of them was significant on all traits excepting number of leaf per plant and ear weight. Application of nitrogen biofertilizers increased yield components of different cultivars of maize specially, for Siloking cultivar and Supernitroplus bio-fertilizer. Siloking cultivar with application of Supernitroplus biofertilizer had the highest plant height and leaf weight and Maxima cultivar with application of Nitroxin biofertilizer had the lowest plant height and leaf weight. However, NS4015 cultivars with non-application of any of N biofertilizer had the highest stem weight. Siloking cultivar had the highest number of leaf per plant and NS4015 cultivar had the lowest number of leaf per plant. Siloking cultivar had the highest all of th