Influence of Six Nitrification Inhibitors on Methane Production in a Flooded Alluvial Soil |
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| Authors: | K. Bharati S. R. Mohanty P.V.L. Padmavathi V. R. Rao T. K. Adhya |
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| Affiliation: | (1) Laboratory of Soil Microbiology, Division of Soil Science and Microbiology, Central Rice Research Institute, Cuttack, 753006 Orissa, India;(2) Department of Botany and Microbiology, Nagarjuna University, Nagarjunanagar, Guntur, 522510 Andhra Pradesh, India |
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| Abstract: | The influence of six nitrification inhibitors (NI) on CH4 production in an alluvial soil under flooded condition was studied in a laboratory incubation experiment. The inhibition of CH4 production followed the order of sodium azide > dicyandiamide (DCD) > pyridine > aminopurine > ammonium thiosulfate > thiourea. Inhibition of CH4 production in DCD-amended soils was related to a high redox potential, low pH, low Fe2+ and lower readily mineralizable carbon content as well as lower population of methanogenic bacteria and their activity. In the presence of higher levels of urea N (40  g), the inhibitory effect of DCD was only partially alleviated. Results indicate that several NIs can differentially regulate CH4 production in a flooded alluvial soil. |
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| Keywords: | incubation dicyandiamide methanogenic bacteria redox potential pH |
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