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| 9. |  | TRANNIN, W. S.; URQUIAGA, S.; GUERRA, J. G. M.; IBIJBJEN, J.; CADISCH, G. Interspecies competition and N transfer in a tropical grass-legume mixture. Biology and Fertility of Soils, Berlin, v. 32, n. 6, p. 441-448, 2000.| Biblioteca(s): Embrapa Agrobiologia. |
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| 10. | | BODDEY, Robert M.; GILLER, K.; CADISCH, G.; ALVES, Bruno J. R.; URQUIAGA, Segundo. Contribution of biological nitrogen fixation to tropical agriculture, actual and potential. In: INTERNATIONAL CONGRESS ON NITROGEN FIXATION, 11., jul. 1997, Paris. Abstracts... Paris: Institut Pasteur; INRA; CNRS; CEA; ORSTOM; CIRAD, 1997. p.17.| Biblioteca(s): Embrapa Agrobiologia. |
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| 12. | | UNKOVICH, M.; HERRIDGE, D.; PEOPLES, M.; CADISCH, G.; BODDEY, B.; GILLER, K.; ALVES, B.; CHALK, P. Measuring plant-associated nitrogen fixation in agricultural systems. Canberra, AU: ACIAR, 2008. 258 p. (ACIAR Monograph, 136).| Biblioteca(s): Embrapa Solos. |
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| 13. | | UNKOVICH, M.; HERRIDGE, D.; PEOPLES, M. CADISCH, G.; BODDEY, R.; GILLER, K.; ALVES, B.; CHALK, P. Measuring plant-associate nitrogen fixation in agricultural systems. Canberra: ACIAR, 2008 240p. (ACIAR Monograph, 136) PARCERIA: ACIAR| Biblioteca(s): Embrapa Agrobiologia. |
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| 15. | | ALVES, B. J. R.; URQUIAGA, S.; CADISCH, G.; OLIVEIRA, O. C.; SOUTO, S. M.; BODDEY, R. M. Mineralizacao in situ e extracao de N por Panicum maximum das diferentes profundidades do solo. In: SIMPOSIO DE CIENCIAS AGRONOMICAS, 1, Itaguai. Resumos... Itaguai : UFRRJ/Instituto Agronomico., v., p.-, 1990.| Biblioteca(s): Embrapa Agrobiologia. |
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| 17. | | OLIVEIRA, O. C. de; OLIVEIRA, I. P. de; FERREIRA, E.; ALVES, B. J. R.; CADISCH, G.; MIRANDA, C. H. B.; VILELA, L.; BODDEY, R. M.; URQUIAGA, S. A Baixa disponibilidade de nutrientes do solo como uma causa potencial da degradação de pastagens no cerrado brasileiro. Viçosa: SOBRADE/UFV/DPS/DEF, 1997. 8 p. (Trabalhos Voluntários; 3).| Biblioteca(s): Embrapa Agrobiologia. |
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| 18. | | OLIVEIRA, O. C. de; OLIVEIRA, I. P. de; FERREIRA, E.; ALVES, Bruno J. R.; CADISCH, G.; MIRANDA, C. H. B.; VILELA, L.; BODDEY, Robert M.; URQUIAGA, Segundo. A baixa disponibilidade de nutrientes do solo como uma causa potencial da degradacao de pastagens no cerrado brasileiro. In: SIMPOSIO NACIONAL DE RECUPERACAO DE AREAS DEGRADADAS - SINRAD, 3., maio 1997, Ouro Preto. Anais... Vicosa: SOBRADE; UFV/DPS/DEF, 1997. p.110-117.| Biblioteca(s): Embrapa Agrobiologia. |
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| 19. | | CARVALHO, E. F.; CADISCH, G.; SUHET, A. R.; VILELA, L.; SOARES, W. V.; LEITE, G. G.; SPAIN, J. M.; BODDEY, R. M.; GILLER, K. E.; URQUIAGA, S. Ciclagem do nitrogenio em pastagens de graminea pura e consorciada com leguminosas num solo de cerrado. In: REUNION SABANAS, 1., 1992, Brasilia, DF. Red Internacional de Evaluacion de Pastos Tropicales - RIEPT. Brasilia: EMBRAPA-CPAC / [Cali]: CIAT, 1992. p.451-453.| Biblioteca(s): Embrapa Cerrados. |
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| 20. | | MACEDO R.; TARRÉ, R. M.; FERREIRA, E.; REZENDE, C. de P.; PEREIRA, J. M.; CADISCH, G.; COSTA, J. R.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Forage intake and botanical composition of feed for cattle fed Brachiaria/legume mixtures. Sci. Agric., Piracicaba, v. 67, n. 4, p.384-392.| Biblioteca(s): Embrapa Agrobiologia. |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
18/09/1996 |
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Data da última atualização: |
18/09/1996 |
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Autoria: |
VIERA-VARGAS, M. S.; OLIVEIRA, O. C. de; SOUTO, C. M.; CADISCH, G.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Use of different 15N labelling techniques to quantify the contribution of biological N2 fixation to legumes. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Soil Biology and Biochemistry, Oxford, v. 27, n. 9, p. 1185-1192, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
The reliable quantification of the contribution of biological N2 fixation (BNF) is an important priority in studies of the N cycle in low-external input farming systems of the tropics where plant-associated BNF if often the largest N input. We have investigated the effect of using more than one control crop, together with different techniques for labelling the soil with 15N, for the application of the isotope dilution technique to quantify the BNF contribution to a forage legume (Centrosema) and French beans (Phaseolus vulgaris). When soil was amended with 15N-labelled organic matter, the 15N enrichment of the soil mineral N decreased slowly with time but when frequent multiple additions of 15N-labelled (NH4)2SO4 were used the 15N enrichment of this N increased with time. Despite this different behaviour of soil 15N enrichment there were no significant differences between 15N treatments in the estimates of the plant N derived from BNF (% Ndfa) of the Centrosema calculated using either of the two non-N2-fixing control crops. This was attributed to the very high %Ndfa of this legume (>84%), a situation where differences in N uptake patterns between control crops are of little importance. In contrast, in the second experiment, the estimates of %Ndfa of P. vulgaris varied from 33 to 62% depending on which 15N addition treatment or control crop was employed. The two estimates derived from the use of non-nodulating bean as control in the different 15N treatments gave a good agreement, which indicated that... MenosThe reliable quantification of the contribution of biological N2 fixation (BNF) is an important priority in studies of the N cycle in low-external input farming systems of the tropics where plant-associated BNF if often the largest N input. We have investigated the effect of using more than one control crop, together with different techniques for labelling the soil with 15N, for the application of the isotope dilution technique to quantify the BNF contribution to a forage legume (Centrosema) and French beans (Phaseolus vulgaris). When soil was amended with 15N-labelled organic matter, the 15N enrichment of the soil mineral N decreased slowly with time but when frequent multiple additions of 15N-labelled (NH4)2SO4 were used the 15N enrichment of this N increased with time. Despite this different behaviour of soil 15N enrichment there were no significant differences between 15N treatments in the estimates of the plant N derived from BNF (% Ndfa) of the Centrosema calculated using either of the two non-N2-fixing control crops. This was attributed to the very high %Ndfa of this legume (>84%), a situation where differences in N uptake patterns between control crops are of little importance. In contrast, in the second experiment, the estimates of %Ndfa of P. vulgaris varied from 33 to 62% depending on which 15N addition treatment or control crop was employed. The two estimates derived from the use of non-nodulating bean as control in the different 15N treatments gave a good agre... Mostrar Tudo |
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Palavras-Chave: |
BNF; FBN; Fixação biologica de nitrogênio; Planta leguminosa. |
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Thesagro: |
Centrosema; Feijão; Phaseolus Vulgaris. |
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Thesaurus NAL: |
kidney beans; legumes; nitrogen fixation. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02389naa a2200301 a 4500
001 1620883
005 1996-09-18
008 1995 bl uuuu u00u1 u #d
100 1 $aVIERA-VARGAS, M. S.
245 $aUse of different 15N labelling techniques to quantify the contribution of biological N2 fixation to legumes.
260 $c1995
520 $aThe reliable quantification of the contribution of biological N2 fixation (BNF) is an important priority in studies of the N cycle in low-external input farming systems of the tropics where plant-associated BNF if often the largest N input. We have investigated the effect of using more than one control crop, together with different techniques for labelling the soil with 15N, for the application of the isotope dilution technique to quantify the BNF contribution to a forage legume (Centrosema) and French beans (Phaseolus vulgaris). When soil was amended with 15N-labelled organic matter, the 15N enrichment of the soil mineral N decreased slowly with time but when frequent multiple additions of 15N-labelled (NH4)2SO4 were used the 15N enrichment of this N increased with time. Despite this different behaviour of soil 15N enrichment there were no significant differences between 15N treatments in the estimates of the plant N derived from BNF (% Ndfa) of the Centrosema calculated using either of the two non-N2-fixing control crops. This was attributed to the very high %Ndfa of this legume (>84%), a situation where differences in N uptake patterns between control crops are of little importance. In contrast, in the second experiment, the estimates of %Ndfa of P. vulgaris varied from 33 to 62% depending on which 15N addition treatment or control crop was employed. The two estimates derived from the use of non-nodulating bean as control in the different 15N treatments gave a good agreement, which indicated that...
650 $akidney beans
650 $alegumes
650 $anitrogen fixation
650 $aCentrosema
650 $aFeijão
650 $aPhaseolus Vulgaris
653 $aBNF
653 $aFBN
653 $aFixação biologica de nitrogênio
653 $aPlanta leguminosa
700 1 $aOLIVEIRA, O. C. de
700 1 $aSOUTO, C. M.
700 1 $aCADISCH, G.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tSoil Biology and Biochemistry, Oxford$gv. 27, n. 9, p. 1185-1192, 1995.
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