A Study on Methane Efflux and Rhizospheric Microbial Population Under Rice Based Ecosystem at Ambient and Elevated CO2 Level
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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Document Type: Research Article
Publication date: February 1, 2016
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