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A Study on Methane Efflux and Rhizospheric Microbial Population Under Rice Based Ecosystem at Ambient and Elevated CO2 Level

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A field experiment was conducted to study the effects of elevated CO2 on CH4 and CO2 emission, microbial Diversity of the rhizosphere and carbon pools and nitrogen from soil in a rice ecosystem under Open Top Chamber (OTC). Plants were grown at ambient (∼386 ppm) and elevated (∼476 ppm) during the rice cropping season in Open Top Chamber. Under elevated CO2 condition the CH4 efflux was significantly higher than the ambient condition and also a gradual increase in CH4 efflux was observed both in the ambient as well as in the elevated condition starting from active tillering stage to harvesting stage (4.8–9.62 mg/m2/h). The microbial population was more under eCO2 condition as compare to ambient. The heterotrophic bacterial population and anaerobic bacterial population was more under eCO2 (7.60 and 3.50 respectively). A significant change in MBC was observed in eCO2 condition.
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Keywords: BACTERIAL POPULATION; ELEVATED CO2; METHANE EFFLUX; OPEN TOP CHAMBER (OTC)

Document Type: Research Article

Publication date: February 1, 2016

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  • ADVANCED SCIENCE LETTERS is an international peer-reviewed journal with a very wide-ranging coverage, consolidates research activities in all areas of (1) Physical Sciences, (2) Biological Sciences, (3) Mathematical Sciences, (4) Engineering, (5) Computer and Information Sciences, and (6) Geosciences to publish original short communications, full research papers and timely brief (mini) reviews with authors photo and biography encompassing the basic and applied research and current developments in educational aspects of these scientific areas.
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