Journal of Pure and Applied MicrobiologyVol. 9 No. 4

Effect of Dual Inoculation of Potassium Solubilizing Bacteria and Phosphorus Solubilizing Bacteria on Microbiological Changes, Enzyme Activity in Rhizosphere of Maize

M.Yallappa, V.P. Savalgi, P. Shruthi, P.S. Arpitha and Nagaraj Hullur

*Department of Agricultural Microbiology, University of Agricultural Science, Dharwad - 580 005, India.

Received on 15 September 2015 and accepted on 12 November 2015



A field was carried out at University of Agricultural Sciences Dharwad to evaluate the Effect of dual inoculation of potassium solubilizing bacteria (KSB) and phosphorus solubilizing bacteria (PSB) on microbiological changes, enzyme activity in rhizosphere of maize crop. Bacterial isolates of potassium solubilizing bacteria (KSB) and phosphorus solubilizing bacteria (PSB) were collected from Department of Agriculture Microbiology, University of Agricultural Sciences, Dharwad. Two strains of present study viz., KSB 11 and KSB 27 in combination with PSB 98(2) showed better performance under field condition. Microbial population (KSB and PSB) and enzyme activities (Dehydrogenase, Urease and Phosphatase) in rhizosphere soil of maize were significantly increased in the treatment inoculated with KSB + PSB as compared to control and single inoculation. The maximum microbial population and enzyme activities were recorded in the treatment KSB 11 + PSB 98 (2) + RDN (P and K at 75%).

Keywords : Potassium solubilizing bacteria (KSB), Phosphorus solubilizing bacteria (PSB), K ?Potassium, P ? Phosphorus, Population, Dehydrogenase, Urease and Phosphatase.