Nitrogen fixation by Spirillum sp. from rice roots |
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Authors: | D N Nayak V Rajaramamohan Rao |
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Institution: | (1) Laboratory of Soil Microbiology, Central Rice Research Institute, 753006 Cuttack, (Orissa), India |
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Abstract: | Nitrogen fixation by Spirillum sp. obtained from the roots of rice plants grown at different levels of combined nitrogen was studied. The roots of rice plants exposed to low levels of combined nitrogen (20–40 kg N/ha) harboured Spirillum sp. possessing higher nitrogen-fixing efficiency as compared to the cultures from plants receiving 60–100 kg N/ha. More-over, the nitrogen-fixing efficiency of these Spirillum spp. varied with age of the plant, irrespective of the dosage of combined nitrogen. |
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Keywords: | Rice root Culture Association Spirillum sp Nitrogen-fixing efficiency Combined nitrogen |
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