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| Registros recuperados: 66 | |
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| Dambreville, C.; Hénault, C.; Bizouard, F.; Morvan, T.; Chaussod, R.; Germon, J.C.. |
| The long-term (9 years) effect of pig slurry applications vs mineral fertilization on denitrifying activity, N2O production and soil organic carbon (C) (extractable C, microbial biomass C and total organic C) was compared at three soil depths of adjacent plots. The denitrifying activities were measured on undisturbed soil cores and on sieved soil samples with acetylene method to estimate denitrification rates under field or potential conditions. Pig slurry applications had a moderate impact on the C pools. Total organic C was increased by +6.5% and microbial biomass C by ≥25%. The potential denitrifying activity on soil suspension was stimulated (×1.8, P<0.05) 12 days after the last slurry application. This stimulation was still apparent, but not... |
| Tipo: Journal Article |
Palavras-chave: LISIER DE PORC; DENITRIFICATION; PROTOXYDE D'AZOTE PIG SLURRY AMENDMENT; DENITRIFICATION; N2O PRODUCTION; MICROBIAL BIOMASS; SOIL ORGANIC MATTER; BIOMASSE MICROBIENNE. |
| Ano: 2006 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2008c3a0ef0a&uri=/notices/prodinra1/2010/12/ |
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| Raymond, N; Bonin, P; Bertrand, Jc. |
| Different types of denitrification rates in coastal marine sediments from the Western Mediterranean coast (France) were simultaneously determined by varioUS C2H2 inhibition techniques: in situ denitrifying activity in intact cores or sediment slurries; DEA (Denitrifying Enzyme Assays); and potential activity. Denitrifying activity was also estimated by the use of kinetic parameters (Km and V(max)). Values for denitrifying activities in the top two centimetres ranged from 0 to 50-mu-moles of nitrous oxide produced per litre of sediment per day, and were similar when intact core or sediment slurries were used. DEA showed comparable values for all the study sites. The potential activity ranged from 298-600-mu-moles per litre per day. Estimated activity based... |
| Tipo: Text |
Palavras-chave: DENITRIFICATION; C2H2 BLOCKAGE; MARINE SEDIMENT; MEDITERRANEAN. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/00100/21148/18767.pdf |
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| Chèneby, D.; Hartmann, A.; Hénault, C.; Topp, E.; Germon, J.C.. |
| The ozone-depleting gas N2O is an intermediate in denitrification, the biological reduction of NO3 – to the gaseous products N2O and N2 gas. The molar ratio of N2O produced (N2O/N2O+N2) varies temporally and spatially, and in some soils N2O may be the dominant end product of denitrification. The fraction of NO3 –-N emitted as N2O may be due at least in part to the abundance and activity of denitrifying bacteria which possess N2O reductase. In this study, we enumerated NO3 –-reducing and denitrifying bacteria, and compared and contrasted collections of denitrifying bacteria isolated from two agricultural soils, one (Auxonne, soil A) with N2O as the dominant product of denitrification, the other (Châlons, soil C) with N2 gas as the dominant product.... |
| Tipo: Journal Article |
Palavras-chave: IDENTIFICATION; REDUCTASE; DENITRIFICATION; RFLP. |
| Ano: 1998 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9900033420073695&uri=/notices/prodinra1/2010/12/ |
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| Registros recuperados: 66 | |
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