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Registros recuperados: 14
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Ammonia volatilization from nitrogen sources applied to rice fields : 2. Floodwater properties and submerged photosynthetic biomass IRD
Fillery, I.R.P.; Roger, Pierre-Armand; De Datta, S.K..
Tipo: Text Palavras-chave: RIZICULTURE; SOL CULTIVE; IRRIGATION; SUBMERSION; EAU DU SOL; AMMONIFICATION; UREE; AMMONIUM; AMENDEMENT DU SOL; ENGRAIS AZOTE; PH; PHOTOSYNTHESE; BIOMASSE ALGALE; VARIATION JOURNALIERE; PPD.PHENYL PHOSPHORODIAMIDATE.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:010024720
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Ammonium formation in Cape Timiris (Mauritania) upwelling IRD
Le Borgne, Robert.
Tipo: Text Palavras-chave: ANALYSE QUANTITATIVE; VARIATION SPATIALE; VARIATION JOURNALIERE; AMMONIUM; MATIERE ORGANIQUE DISSOUTE; AZOTE; CHLOROPHYLLE; EXCRETION; PHYTOPLANCTON; ZOOPLANCTON; UPWELLING; ACTIVITE HETEROTROPHE.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:01133
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Azote et phosphore chez un crustacé macroplanctonique, Meganyctiphanes norvegica (M. Sars) (Euphausiacea) : excrétion minérale et constitution IRD
Roger, Claude.
Tipo: Text Palavras-chave: ZOOPLANCTON; EXCRETION; ANALYSE QUANTITATIVE; AMMONIUM; PHOSPHATE; VARIATION SAISONNIERE; FACTEUR ABIOTIQUE; CYCLE DE L'AZOTE; AZOTE; PHOSPHORE; RAPPORT NP; CRUSTACEA; EUPHAUSIACEA; EUPHAUSIIDAE; MEGANYCTIPHANES NORVEGICA.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:09360
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Détermination des ions nitrite et ammonium dans les eaux de puits de Pikine (Dakar) par la chromatographie ionique IRD
Diop, A.; Pastore, P.; Magno, F..
Tipo: Text Palavras-chave: EAU; METHODE D'ANALYSE; AMMONIUM; NITRITE; CHROMATOGRAPHIE IONIQUE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:38533
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Estimation of bottom ammonium affinity in the New Caledonian lagoon IRD
Boucher, G.; Clavier, Jacques; Garrigue, Claire.
Ammonium affinity of New Caledonia lagoon benthic communities was measured during the course of 33 #in situ$ enrichment experiments, in order to estimate the contribution of benthos to ammonium fluxes. Ammonium chloride was injected into enclosures pushed into the sediment ... Ammonium kinetic uptake was then followed for two yours. Grey-sand bottom displayed the highest affinity was the same order of magnitude. Macrophytes, and microphytes (when macrophytes are absent), account for the bulk of ammonium bottom uptake. As a result, grey-sand bottoms with their dense macrophyte cover represent a sink for water column nitrogen and play a key role in nutrient cycling of the lagoon. (D'après résumé d'auteur)
Tipo: Text Palavras-chave: LAGON; SEDIMENT; BENTHOS; AMMONIUM; FLUX; CORRELATION NUMERIQUE; MACROPHYTE; CYCLE DE L'AZOTE.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:39878
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Etude des mecanismes chimiques lies a la denitrification dans un sediment de la vallee de la Vistrenque (Gard) Inra
Ouar, S..
Tipo: Thesis Palavras-chave: DOSAGE ISOTOPIQUE; MICROORGANISME DU SOL; POLLUTION D'ORIGINE INDUSTRIELLE; NITRITE; AMMONIUM; DENITRIFICATION; ANOXIE; SOLUBILISATION; METAL.
Ano: 1994 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9400024403040259&uri=/notices/prodinra1/2010/12/
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Heterotrophic activity in the mauritanian upwelling in march 1973 : assimilation and mineralization of amino acids IRD
Herbland, Alain.
Tipo: Text Palavras-chave: PRODUCTION BIOLOGIQUE; ACTIVITE BIOLOGIQUE; BACTERIE; CHLOROPHYLLE; NITRATE; OXYGENE DISSOUS; PHOSPHORE ORGANIQUE; AMMONIUM; EXCRETION; PHYTOPLANCTON; VARIATION SPATIALE; VARIATION TEMPORELLE; RYTHME NYCTHEMERAL; UPWELLING; ACTIVITE HETEROTROPHE.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:09981
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Impact de la dynamique hydroloqigue sur les cycles de nutriments en zone inondable tropicale sahélienne IRD
Orange, Didier; Arfi, Robert; Bénech, Vincent; Kuper, M.; Marieu, B.; Sidibé, I..
Tipo: Text Palavras-chave: DELTA; PLAINE INONDABLE; HYDRODYNAMIQUE; FONCTIONNEMENT DE L'ECOSYSTEME; NUTRIMENT; CYCLE BIOGEOCHIMIQUE; MATIERE ORGANIQUE DISSOUTE; AZOTE; PHOSPHORE; NITRATE; PHOSPHATE; AMMONIUM; PRODUCTION PRIMAIRE; NIVEAU TROPHIQUE; VARIATION SAISONNIERE.
Ano: 2002 URL: http://www.documentation.ird.fr/hor/fdi:010030370
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Influence of duration of incubation on zooplankton respiration and excretion results IRD
Le Borgne, Robert.
Tipo: Text Palavras-chave: ZOOPLANCTON; RESPIRATION; EXCRETION; AMMONIUM; AZOTE; PHOSPHORE; ANALYSE QUANTITATIVE; VARIATION TEMPORELLE; CORRELATION STATISTIQUE; DUREE D'INCUBATION.
Ano: 1979 URL: http://www.documentation.ird.fr/hor/fdi:09663
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La distribution des sels nutritifs (NO3 - NO2 - NH4 - PO4 - SiO3) dans l'Océan Atlantique intertropical oriental (région du golfe de Guinée) IRD
Oudot, Claude.
Tipo: Text Palavras-chave: SEL NUTRITIF; NITRATE; NITRITE; PHOSPHATE; AMMONIUM; SILICATE; REPARTITION HORIZONTALE; REPARTITION VERTICALE; VARIATION SAISONNIERE.
Ano: 1983 URL: http://www.documentation.ird.fr/hor/fdi:15474
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Nitrification dans un systeme modelise Inra
Simon-Sylvestre, G.; Calvet, R..
La mise au point d’une technique simple, pour l’étude de la nitrification dans un milieu poreux modèle, permet d’envisager de faire varier assez facilement les conditions d’expérimentation et d’approndir ainsi nos connaissances sur ce processus biologique. Les résultats antérieurs de plusieurs chercheurs, à savoir l’influence néfaste des ions ammonium sur la nitrification, sont retrouvés dans une première application de ce modèle. Il apparaît également dans une autre expérimentation, réalisée en présence d’une phase solide adsorbante (argile), que seuls les cations NH+4 désorbés peuvent être oxydés, en quantité variable suivant la nature de l’argile, et que la toxicité d’une substance xénobiotique ajoutée est modifiée par suite de son adsorption,...
Tipo: Journal Article Palavras-chave: NITRIFICATION; ARGILE; AMMONIUM.
Ano: 1987 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9100000019018102&uri=/notices/prodinra1/2009/07/
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Potassium release and fixation in ferralsols (oxisols) from Southern Togo IRD
Poss, Roland; Fardeau, J.C.; Saragoni, H.; Quantin, Paul.
Tipo: Text Palavras-chave: POTASSIUM; FERTILISATION DU SOL; AMMONIUM; ECHANGE D'IONS; MINERALOGIE; ARGILE.
Ano: 1991 URL: http://www.documentation.ird.fr/hor/fdi:35518
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Tree girdling increases soil N mineralisation in two spruce stands Inra
Zeller, B.; Liu, J.; Buchmann, N.; Richter, A..
Tree girdling is a common practice in forestry whenever trees are to be killed without felling. The effect of tree girdling on soil nitrogen (N) mineralisation was estimated in both an old and a young spruce forest. The dynamics of mineral N (NO3-–N and NH4 +–N) and soil microbial biomass carbon (MBC) and N (MBN) were determined for different seasons. The in situ net N mineralisation was measured by incubating soil samples in stainless steel cylinders and the gross N mineralisation rates were measured by 15N pool dilution method. Mineral N concentrations increased significantly in the girdled plots in both old and young spruce forests and showed variations between soil horizons and between sampling times. Tree girdling significantly increased net N...
Tipo: Journal Article Palavras-chave: BIOGEOCHIMIE; FLUX ET STOCKS ELEMENTS; MATIERE ORGANIQUE DU SOL; OBSERVATION ET ANALYSE DES PROCESSUS; VARIABILITE SPATIALE ET TEMPORELLE GROSS NITROGEN TRANSFORMATIONS; HOOP PINE PLANTATION; ACID FOREST SOILS; MICROBIAL BIOMASS; SUBTROPICAL AUSTRALIA; NITRIFICATION; CARBON; RESPIRATION; DYNAMICS; ROOTS; AMMONIUM; MICROBIAL BIOMASS; NITRATE; N MINERALISATION; SPRUCE FOREST; TREE GIRDLING .
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201077d71a1&uri=/notices/prodinra1/2011/01/
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Vertical structure and diurnal variability of ammonia exchange potential within an intensively managed grass canopy Inra
Herrmann, B.; Mattsson, M.; Jones, S.K.; Cellier, P.; Milford, C.; Sutton, M.A.; Schjoerring, J.K.; Neftel, A..
Stomatal ammonia compensation points (Xs) of grass species on a mixed fertilized grassland were determined by measurements of apoplastic [NH4+] and [H>+] in the field. Calculated Xs values were compared with in-canopy atmospheric NH3 concentration (Xa) measurements.Leaf apoplastic [NH4+] increased by a factor of two from the lowest level in the canopy to the top level. Bulk leaf [NH4+] and especially [NO3-] slightly increased at the bottom of the canopy and these concentrations were very high in senescent plant litter. Calculated Xs values were below atmospheric Xs at all canopy levels measured, indicating that the grassland was characterized by NH3 deposition before cutting. This was confirmed by the Xa profile, showing the lowest Xa close to the...
Tipo: Journal Article Palavras-chave: AMMONIUM; POINT DE COMPENSATION STOMATIQUE; APOPLASTE; DEPOT.
Ano: 2009 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20095f1ce749&uri=/notices/prodinra1/2011/04/
Registros recuperados: 14
Primeira ... 1 ... Última
 

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