摘要：The ability of phosphorus solubilizing bacteria (PSB) to solubilize soil phosphorus (P) in actual field conditionis never beyond scientific contradiction. Further, its (PSB) dynamics under unique waterlogged, anaerobicrice ecosystem is a matter of interest. In this context, performance of Pseudomonas putida was tested asPSB in lowland rice soil. No significant impact of P. putida on soil available P status was found. The treatmentof crop seedlings with PSB also showed no major response onto the vegetative as well as yield parametersof rice crop. Results inferred that, in presence of optimum amount of soil N and K, the addition of external Pthrough phosphatic fertilizer and/or vermicompost was the controlling factor for soil P availability as well asproductivity and quality of rice. Further, vermicompost boosted the soil total microbial population. The irrelevantimpact of P. putida as PSB onto the soil available P status and rice productivity might be partially due to theanaerobic waterlogged rice environment, which did not support the proliferation and activity of these aerobicgram-negative bacteria. However, in comparison to the earlier findings, a further detailed study at field levelis necessary to understand the dynamics of PSB in submerged rice soil.
