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METHANE PRODUCTION FROM ANAEROBIC SOIL AMENDED WITH RICE STRAW AND NITROGEN FERTILIZERS
Citation:
Wang, Z., R. Delaune, C. Lindau, AND W. Patrick, Jr. METHANE PRODUCTION FROM ANAEROBIC SOIL AMENDED WITH RICE STRAW AND NITROGEN FERTILIZERS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/289 (NTIS PB93222800), 1992.
Description:
Laboratory experiments were conducted on the effects of rice straw application and inorganic N fertilization on methane (CH4) production from a flooded Louisiana, USA, rice soil. ignificant increase of CH4 production was observed following rice straw application. ethane production increased in proportion to the application rate. rea fertilization also enhanced CH4- The maximum production rate was 17% higher, and occurred 1 week earlier, than that of soil samples which did not receive urea, possibly due to the increase in soil pH following urea hydrolysis. he increase in soil pH following urea hydrolysis may have stimulated CH4-generating bacteria by providing more optimal soil pH conditions or contributed to the drop in redox potential (Eh). he significant decrease in both the production rate and the total amount of CH4 by application of NH4NO3 was associated with increases and almost completely inhibited CH4 production. owever, this inhibitory effect was short-termed. oon after the applied N@3-N was reduced through denitrification, CH4 Production increased. hen (NH4)2SO4 was applied, the inhibition of CH4 production was not associated with an increase in soil Eh which did not change significantly. irect inhibitory effect of sulphate on methanogenesis might have been more important.
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METHANE PRODUCTION FROM ANAEROBIC SOIL AMENDED WITH RICE STRAW AND NITROGEN FERTILIZERS