Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| Title (Primary) | Microbiological aspects of methane emission by a ricefield soil from the Camargue (France): 1. Methanogenesis and related microflora |
| Author | Joulian, C.; Ollivier, B.; Neue, H.-U.; Roger, P.A. |
| Source Titel | European Journal of Soil Biology |
| Year | 1996 |
| Department | BOFO; BOSYS |
| Volume | 32 |
| Issue | 2 |
| Page From | 61 |
| Page To | 70 |
| Language | englisch |
| Keywords | Methane; rice; soil; acetotrophs; hydrogenotrophs; methylotrophs; formatotrophs; cellulose; xylan; desiccation; straw; algae |
| Abstract | The major trophic groups of methanogens and the methanogenic potential of a rice soil from Camargue (France) were studied under laboratoiy conditions, with regard to the effects of soil desiccation and the addition of straw or algal material. The dynamics of cellulose and xylan fermentation by the soil microflora were also established. Methanogens remained viable for several months in dry oxic soil, indicating that their density at the end of the crop cycle might not be markedly reduced by the dry fallow that usually follows rice harvest. Methanogenic activities were maximum two weeks after soil submersion. The native soil organic matter mineralized after submersion favoured acetotrophic methanogens, while adding straw or algae favoured hydrogenotrophic methanogens. Straw or algae addition increased populations of hydrogenotrophs and formatotrophs similarly, while four times more CH4 was produced with straw than with algae. Methanogenesis appeared to be more limited by the availability and nature of the substrate than by the density of methanogens. Cellulose fermentation by the soil microflora exhibited a first stage, where hydrogenotrophs were mostly responsible for methanogenesis through interspecies H2 transfer, and a second stage, where acetotrophs consumed accumulated acetate. Counts, microscopic observations, and strain isolations showed a diversified methanogenic microflora including rods, sarcinae, cocci and spirilla. Four mesophilic, neutrophilic strains were isolated and phenotypically characterized. |
| Joulian, C., Ollivier, B., Neue, H.-U., Roger, P.A. (1996): Microbiological aspects of methane emission by a ricefield soil from the Camargue (France): 1. Methanogenesis and related microflora Eur. J. Soil Biol. 32 (2), 61 - 70 |
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