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International Journal of Soil Science
Year: 2015  |  Volume: 10  |  Issue: 2  |  Page No.: 93 - 99

Impact of Inoculation with Arbuscular Mycorrhizal, Phosphate Solubilizing Bacteria and Soil Yeast on Growth, Yield and Phosphorus Content of Onion Plants

Hashem Mahmoud Mohamed    

Abstract: A factorial design experiment was conducted on field to investigate the effects of inoculation with AM fungi (Glomus mosseae), phosphate solubilizing bacteria strain (Bacillus polymyxa) and soil yeast strain (Saccharomyces cerevisiae) on growth, phosphorus content and yield of onion plants in calcareous soil under different levels of phosphorus fertilization (P1: 50, P2: 100 and P3: 200 kg ha-1). Results showed that inoculation with G. mosseae or B. polymyxa significantly (p = 0.05) increased plant height, shoot fresh and dry weights, root fresh and dry weights, average bulb diameter and total yield. The highest total yield and average bulb diameter were obtained from the inoculation treatment of AM fungus G. mosseae, recording 14.4 and 40.8% increases, respectively over the uninoculated control. Also, inoculation with AM fungus (G. mosseae) had a significant increase in all mineral content in onion plant compared with uninoculated control or other biofertilizers inoculation treatments (B. polymyxa or soil yeast strain S. cerevisiae). Only, inoculation with phosphate solubilizing bacteria B. polymyxa had significant increase in P content and non significant increases in N, K, Fe, Zn and Mn. Inoculation with soil yeast S. cerevisiae had a non-significant increase in all minerals content of onion plant.

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