Abstract
Influence of farmyard manure (FYM) and pyrite application on methanotroph population and rice yield was examined during July 2008 to October 2008 in rain-fed saline paddy field using a rice variety namely HUR-3010. Four treatment plots with three replicates were established in completely randomized block design. The experimental design consisted of (a) control, (b) FYM, (c) pyrite, and (d) FYM + pyrite. Average methanotroph population was highest in FYM + pyrite treated plot (79.0 × 10 5 cells g −1 dry soil), and lowest in control plot (23.0 × 10 5 cells g −1 dry soil). Regression analysis exhibited negative relationship of methanotroph population with EC ( R 2 = −0.937) and NH 4 +–N ( R 2 = −0.892). Rice yield was highest in FYM + pyrite applied plots, while lowest in the control plot. Results suggested that the application of FYM and pyrite singly or in combination significantly enhance the number of soil methanotroph as well as rice yield in the saline paddy field.
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