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Response of methane emissions, redox potential, and pH to eucalyptus biocharand rice straw addition in a paddy soil |
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| รหัสดีโอไอ | |
| Creator | 1. Nipa Thammasom 2. Patma Vityakon 3. Patcharee Saenjan |
| Title | Response of methane emissions, redox potential, and pH to eucalyptus biocharand rice straw addition in a paddy soil |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2559 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 38 |
| Journal No. | 3 |
| Page no. | 325-331 |
| Keyword | organic residue quality,organic decomposition,eucalyptus wood biochar,greenhouse gas emission,carbon mineralization |
| ISSN | 0125-3408 |
| Abstract | This study aims to comprehend the links between soil Eh and pH changes in eucalyptus biochar (BC) and rice straw(RS) amended soils and CH4 emissions. Increased CH4 emission rates and high total CH4 emissions (TCH4) were found in RSsoils. In contrast, higher concentrations of refractory lignin, fixed C and volatile matter in BC suppressed C mineralizationand terminal methanogenesis, resulting in low TCH4. Eh in RS soils decreased more rapidly than in BC soils during the firstphase as a single exponential function. This indicated that RS is a fast electron donor for an instant electron acceptorreduction and methanogenesis. During the second phase, Eh in BC soils decreased to very low values, probably because ofthe higher concentrations of electron donating phenolic compounds coupled with terminal methanogenesis. Meanwhile,hydrogen is consumed via electron acceptor reduction and methanogenesis simultaneously produce OH- corresponded witha rise of pH, a characteristic of reverse single exponential function. |
