Univrsity of Tehran Press Iranian Journal of Field Crop Science 2008-4811 45 1 2014 03 21 Effects of Azospirillum and Azotobacter on yield and yield components of barley (Hordeum vulgare L.) under various levels of cow manure application Effects of Azospirillum and Azotobacter on yield and yield components of barley (Hordeum vulgare L.) under various levels of cow manure application 65 72 51025 10.22059/ijfcs.2014.51025 FA Monir Dahmardeh MSc. Student of Agro-Ecology, Faculty of Agriculture, University of Zabol, Zabol, Iran Isa Khammari Assistant Professor, Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran Mahdi Dahmardeh Assistant Professor, Department of Agronomy, Faculty of Agriculture, University of Zabol, Zabol, Iran Ahmad Asgharzadeh Asistant Professor, Soil and Water Research Institute, Iran Journal Article 2013 06 23 To study the effect of biofertilizers and manure on yield and yield components of barley (Hordeum vulgare) an experiment was conducted at Research Farm of University of Zabol, Iran in 2012 cropping season. Experimental treatments were arranged in a factorial design based on a randomized complete block design with three replications. Treatments were three manure levels (control, 20 ton/h-1, 30 ton/h-1) and four levels of biofertilizers (control, Azospirillum, Azotobacter and Azospyrilium+Azotobacter). Results indicated that manure levels had a significant effect on plant height, spike length, number of seed in spike and number of spike in plant. Biofertilizers caused significant differences in all measured traits expect for harvest index. The interaction effects showed that integrated application of manure and biofertilizers were more effective on barley growth. The highest economical yield (2.6 ton/h-1) was detected in 20 ton/h-1manure + Azospirillum and Azotobacter application. Integrated application of manure and biofertilizers could significantly increase seed yield and yield components of barley. To study the effect of biofertilizers and manure on yield and yield components of barley (Hordeum vulgare) an experiment was conducted at Research Farm of University of Zabol, Iran in 2012 cropping season. Experimental treatments were arranged in a factorial design based on a randomized complete block design with three replications. Treatments were three manure levels (control, 20 ton/h-1, 30 ton/h-1) and four levels of biofertilizers (control, Azospirillum, Azotobacter and Azospyrilium+Azotobacter). Results indicated that manure levels had a significant effect on plant height, spike length, number of seed in spike and number of spike in plant. Biofertilizers caused significant differences in all measured traits expect for harvest index. The interaction effects showed that integrated application of manure and biofertilizers were more effective on barley growth. The highest economical yield (2.6 ton/h-1) was detected in 20 ton/h-1manure + Azospirillum and Azotobacter application. Integrated application of manure and biofertilizers could significantly increase seed yield and yield components of barley.

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