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| Effects of simulated sulfate deposition on CH4 fluxes from tidal wetland in the Min River estuary |
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Abstract In order to examine the effects of simulated sulfate deposition on methane emissions in estuary wetlands, monthly pulses of dissolved Na2SO4 were applied to the Cpyerus malaccensis wetland on the neap dates in the Min River estuary over nine months in doses of 25,50,100 kg SO42--S/ (hm2?a ). There was no suppression in most months, only in fewer months, there was a weak suppression. A suppressive effect on methane production amount was observed in the simulated SO42- addition in laboratory anaerobic incubation experiment, however, the suppression percentage was only between 8.5% to 15.4 % ralative to control treatment. The adding of non-competitive methane production substrates (methanol and trimethylamine) increased methane production amount in laboratory anaerobic incubation experiment, which would explain the conclusion that simulated SO42- deposition in situ had no suppression on methane emission in estuary wetlands.
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Received: 10 August 2009
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