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Registros recuperados: 7
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Compte-rendu sur trois années d'expérimentation avec des isotopes en riziculture à Madagascar IRD
Velly, Jacques.
Tipo: Text Palavras-chave: RECHERCHE AGRONOMIQUE; FUMURE; RIZ; ENGRAIS; AZOTE; PHOSPHORE; ISOTOPE; EXPERIMENTATION; N 15; P 32.
Ano: 1968 URL: http://www.documentation.ird.fr/hor/fdi:13555
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Difference of mercury bioaccumulation in red mullets from the north-western Mediterranean and Black seas ArchiMer
Harmelin-vivien, M.; Cossa, Daniel; Crochet, Sylvette; Banaru, D.; Letourneur, Y.; Mellon-duval, Capucine.
The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta N-15) were evaluated in Mullus barbatus barbatus and M. surmuletus from the Mediterranean Sea and M. barbatus ponticus from the Black Sea. Mercury concentration in fish muscle was six times higher in the two Mediterranean species than in the Black Sea one for similar sized animals. A positive correlation between Hg concentration and delta N-15 occurred in all species. Increase in Hg concentration with delta N-15 was high and similar in the two Mediterranean fishes and much lower in the Black Sea species. Since this was neither related to trophic level difference between species nor to methylmercury (MeHg) concentration differences between the north-western...
Tipo: Text Palavras-chave: Black Sea; Mediterranean; Mullidae; Methylmercury; Trophic level; N 15.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6647.pdf
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Estimation of biological N2 fixation and its contribution to nitrogen balance in wetland rice fields IRD
Roger, Pierre-Armand; Ladha, J.K..
Tipo: Text Palavras-chave: RIZIERE; CYCLE DE L'AZOTE; FIXATION BIOLOGIQUE DE L'AZOTE; ARA; LEGUMINEUSE; ENGRAIS VERT; APPLICATION AGRONOMIQUE; METHODOLOGIE; ECOLOGIE; MICROBIOLOGIE DU SOL; QUANTIFICATION; N 15.
Ano: 1990 URL: http://www.documentation.ird.fr/hor/fdi:30178
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Matière organique et fertilité : rôle des bilans et des fractionnements de matière organique dans les études de système sol-plante = Materia orgànica y fertilidad : rol de los balances y de los fraccionamientos de materia orgànica en los estudios de sistemas suelo-planta IRD
Hetier, J.M.; Guiraud, G..
Tipo: Text Palavras-chave: MATIERE ORGANIQUE; FERTILITE DU SOL; BILAN ORGANIQUE; CARBONE; C 14; AZOTE; RELATION SOL PLANTE; STOCK ORGANIQUE; N 15.
Ano: 1986 URL: http://www.documentation.ird.fr/hor/fdi:24540
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NH4+ turnover in intertidal sediments of Marennes-Oleron Bay (France): effect of sediment temperature ArchiMer
Vouve, Florence; Guiraud, Gérard; Marol, Christine; Girard, Marine; Richard, Pierre; Laima, Mario.
NH4+ turnover plays an important role in benthic compartment as source of nutrient for primary production. The intertidal mudflats of the Marennes-Oleron Bay are characterized by high fluctuations of sediment temperature that generally ranges from 10 to 30 degreesC during emersion periods. Influence of sediment temperature on NH4+ processes was investigated. Grass ammonification and NH4+ incorporation kinetics were studied using the N-15 isotope dilution method. The method was first adapted to these very fine sediments and applied to 2 upper sediment layers (0-2 and 2-4 cm) at different incubation times of up to 120 h. The effect of sediment temperature on gross ammonification and NH4+ incorporation rates was investigated at 10, 20 and 30 degreesC. There...
Tipo: Text Palavras-chave: N 15; Intertidal sediments; Sediment temperature; NH4+ turnover; 15N; Sédiments intertidaux; Température du sédiment; Régénération du NH4 +.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-530.pdf
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Routine 15N analysis on small samples by emission spectrometry IRD
Lemasson, Lionel; Pagès, Jean; Guiraud, G.; Marol, C. (collab.).
Tipo: Text Palavras-chave: METHODE D'ANALYSE; ANALYSE QUANTITATIVE; SPECTROMETRIE D'EMISSION; AZOTE; ISOTOPE; ETALONNAGE; SPECTROSCOPIE; PHYTOPLANCTON; SOL; MATIERE ORGANIQUE PARTICULEE; N 15.
Ano: 1982 URL: http://www.documentation.ird.fr/hor/fdi:03337
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Utilisation de la méthode d'analyse par spectrométrie d'émission pour la détermination de 15N en écologie aquatique : assimilation du nitrate par le phytoplancton en mer de Banda (Indonésie) IRD
Lemasson, Lionel; Pagès, Jean.
Tipo: Text Palavras-chave: METHODE D'ANALYSE; SPECTROMETRIE D'EMISSION; ANALYSE QUANTITATIVE; PHYTOPLANCTON; PRODUCTION PRIMAIRE; C 14; ASSIMILATION; ECOLOGIE; MILIEU AQUATIQUE; NITRATE; N 15.
Ano: 1983 URL: http://www.documentation.ird.fr/hor/fdi:04015
Registros recuperados: 7
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