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Effect of By-Product Gypsum Fertilizer on Methane Gas Emissions and Rice Productivity in Paddy Field
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 Title & Authors
Effect of By-Product Gypsum Fertilizer on Methane Gas Emissions and Rice Productivity in Paddy Field
Park, Jun-Hong; Sonn, Yeon-Kyu; Kong, Myung-Suk; Zhang, Yong-Seon; Park, Sang-Jo; Won, Jong-Gun; Lee, Suk-Hee; Seo, Dong-Hwan; Park, So-Deuk; Kim, Jang-Eok;
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Rice cultivation in paddy field affects the global balance of methane () as a key greenhouse gas. To evaluate a potential use of by-product gypsum fertilizer (BGF) in reducing emission from paddy soil, fluxes from a paddy soil applied with BGF different levels (0, 2, 4 and ) were investigated by closed-chamber method during rice cultivation period. flux significantly decreased (p<0.05) with increasing level of BGF application. of BGF addition in soil reduced flux by 60.6% compared to control. Decreased soil redox potential (Eh) resulted in increasing emission through a reduction reaction. The concentrations of dissolved calcium (Ca) and sulfate ion () in soil pore water were significantly increased as the application rate of BGF increased and showed negatively correlations with flux. Decreased flux with BGF application implied that ion led to decreases in electron availability for methanogen and precipitation reaction of Ca ion with inorganic carbon including carbonate and bicarbonate as a source of formation under anoxic condition. BGF application also increased rice grain yield by 16% at of BGF addition. Therefore, our results suggest that BGF application can be a good soil management practice to reduce emission from paddy soil and to increase rice yield.
Methane emission;By-product gypsum;Rice;Paddy soil;
 Cited by
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