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Phosphate Solubilising Activity of Soil Microbes Isolated from the Rhizosphere of Tasar growing Field

Soma Karmakar*

Phosphorus is an essential element after nitrogen needed for development and growth of plant. P deficiency has adverse effect on the plant such as browning of leaves, leaf size decreases, stem become weak and development become slowly. Phosphate Solubilizing Bacteria present in the soil converts phosphate into bioavailable form through mineralization and solubilisation process. Hence, the study was carried out to study the Phosphate Solubilizing Efficiency by drop plate method of 21 strains isolated from Tasar growing region and to identify the strain through biochemical characterization. It was found that C13 showed the highest PSE of 2.66 followed by C18, 2.14; C11, 1.85; C20,1.71 and C21,1.625. Some of the colonies do not shown any Phosphate Solubilizing Activity C1, C8, C9 and C19. From the result of biochemical study, the strains were identified as Pseudomonas spp, Bacillus spp, Planococcus spp and Azotobacter spp.