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  • Title: Influence of heavy metals on methane oxidation in tropical rice soils.
    Author: Mohanty SR, Bharati K, Deepa N, Rao VR, Adhya TK.
    Journal: Ecotoxicol Environ Saf; 2000 Nov; 47(3):277-84. PubMed ID: 11139181.
    Abstract:
    In a laboratory incubation study, the effect of select heavy metals on methane (CH4) oxidation in two rice soils was investigated under two moisture regimes. Heavy metals differed in their effect on CH4 oxidation in both soils under the two water regimes. Cr significantly inhibited CH4 oxidation in the alluvial soil at 60% moisture holding capacity, while Cu stimulated the process. On the contrary, Zn inhibited CH4 oxidation in both alluvial and laterite soils only under flooded conditions. Application of rice straw alleviated the inhibitory effect of heavy metals on CH4 oxidation and CO2 production. Inhibition of CH4 oxidation in the alluvial soil was related to the methanotrophic bacterial population in Cr- and Zn-amended alluvial soil.
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