Effect of carbon sources on asymbiotic nitrogen fixation in a paddy soil |
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Authors: | V.Rajaramamohan Rao |
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Affiliation: | Institute of Microbiology, U.S.S.R. Academy of Sciences, MoscowU.S.S.R. |
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Abstract: | The effect of various carbon sources on asymbiotic N2 fixation in a paddy soil was studied by C2H2 reduction and 15N tracer techniques. N2 fixation increased with increasing concentrations of cellulose and rice straw, but the former was more effective. N2 fixation was considerably enhanced in soils amended with glucose, sucrose, succinate, acetate, butyrate, pyruvate or n-propanol, while n-butanol, ethanol, lignin or paraffin were ineffective. Succinate at low moisture content and butyrate under flooded conditions stimulated N2 fixation during a 15-day incubation. |
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