Journal of Pure and Applied MicrobiologyVol. 1 No. 2

Isolation and Mass Multiplication of Rhizobium sp. for Nitrogen Enrichment of Vermicompost

N. Manivannan and Thilagavathi Daniel*

Department of Biology, Faculty of Rural Oriented Sciences, Gandhigram Rural University, Gandhigram - 624 302, India.

Received on 20 September 2007 and accepted on 15 October 2007



Gram-positive rod shaped aerobic bacteria related to the genus Rhizobium sp was isolated from the root nodules of cowpea plant and mass multiplied. The cell count was characterized periodically and the cell suspension was mixed with vermicompost at 1x108 cells per ml for 1 gram of vermicompost and the mixture was tested in pot culture studies. Higher productivity of cowpea (Vigna unguiculata) was observed.

Keywords : Rhizobium sp, Eudrilus eugeniae, Vermicompost, Vigna unguiculata.