Research Symposium-2012

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Evaluation of Nitrogen Fixation Ability of Azospirillum spp. associated with Sugarcane, Maize and Guinea Grass
(Uva Wellassa University of Sri Lanka, 2012) Kumari, D. P. M. K.; Chandrasena, G.
Biological nitrogen fixation is gaining importance in current agriculture because of people’s concern on the environmental and soil heath that are caused by the continuous use of nitrogenous fertilizers and need for improved sustainable productivity. From several earlier studies, it has been shown that, Azospirillum is an important free-living, N fixing bacterium which makes a symbiotic association on roots of different crops. Nitrogen fixation by Azospirillum spp. in association with grasses and other plants has been examined when it is observed in preparation of a bio fertilizer. Biofenilizers are defined as preparations containing living or latent cells of efficient strains of microorganisms that help crop plants to uptake of nutrients by their interactions in the rhizosphere, when applied through seeds or to Oil treatments. The present study was conducted to isolate the Azospirillum spp., to evaluate the nitrogen fixation abilities of isolates and to assess the perforiiiaMce of inoculated plants.