National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Rice cultivation is taken in flooded soil condition. This creates an anaerobic environment and harbours different group of anaerobes. The continued submergence of soil provides a reducing environment and effects a build-up of anaerobic ecosystem in which two unique processes namely methane emission and reductive transformation of nitrogen occur. But the role played by specific group of anaerobes with respect to nitrogen transformation is still obscure. A study was undertaken to assess the different groups of anaerobes in nitrogen transformation in flooded rice soils. The nitrogen fixing obligate and facultative anaerobes were isolated and characterised from paddy ecosystem. The population of culturable anaerobic bacteria in flooded rice soils was enumerated by the anaerobic roll tube method using Hungates agar medium. Higher AR activity was noticed for the screened obligate and facultative anaerobic bacteria and exhibited maximum activity on 132nd hour (19.81 n moles of C2H4 mg-1 protein h-1. In the present investigation, the occurrences of anaerobic nitrogen fixer in the paddy ecosystem and their role in nitrogen fixation have been examined.
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