Inoculation Effect of Common Biofertilizers on Growth and Uptake of Some Elements by Bean (Phaseolus vulgaris L.) in Presence of Soil Indigenous Microflora

Abstract
In recent years due to the detrimental effects of high application of chemical fertilizers, the production and usage of nitrogen (N) and phosphate (P) biofertilizers have been increased in Iran. Thus, the aim of this study was simultaneously comparing bean plant response to inoculation with common biofertilizers produced in Iran. In order to investigate the effects of four biofertilizers such as Nitroxin, Supernitroplus, Biosuperphosphate (biofertilizers which produced by MehrAsia Biotechnology Company) Barvar2 (products of Green Biotechnology) on shoot fresh and dry weight, fresh and dry weight of root, total fresh and dry weight, and other quality parameters such as nutrient concentrations of N, P, potassium (K) and iron (Fe) in bean (native variety of Azarbayjan), a greenhouse pot experiment in a completely randomized design was conducted in Faculty of Agriculture, University of Tabriz in the summer of 2011.Treatments included control (without inoculation), Nitroxin, Supernitroplus, Biosuperphosphate and Barvar2 were applied in four replications. Seed inoculation with the biofertilizers was done according to the manufacturer's recommendations. Pots were irrigated with distilled water at 0.8 FC. The results showed that inoculation of bean with biofertilizers had significant effect on fresh weight of shoot, total fresh weight, dry weight of root, shoot N concentration, shoot K uptake, root P uptake and moreover root Fe concentration and content. Nitroxin significantly increased N concentration of shoot (80.76%) and the highest mean of biomass was belonged to Barvar2 (24.5%) while, Nitroxin and Supernitroplus from the point of mean value of root dry weight, the amount of K in shoot and the amount of P and Fe uptake by roots were the same as control (without inoculation treatment). According to the results among biofertilizers best N nutrition of bean was with Nitroxin while lowest root Fe concentration was observed in this treatment. Highest fresh yield was gained with Barvar2.