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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
15/03/1999 |
Data da última atualização: |
15/03/1999 |
Autoria: |
VIERA-VARGAS, M. S.; SOUTO, C. M.; URQUIAGA, S.; BODDEY, R. M. |
Título: |
Quantification of the contribution of N2 fixation to tropical forage legumes and transfer to associated grass. |
Ano de publicação: |
1995 |
Fonte/Imprenta: |
Soil Biology and Biochemistry, Oxford, v. 27, n. 9, p. 1193-1200, 1995. |
Idioma: |
Inglês |
Conteúdo: |
Pastures, mainly dedicated to beef cattle production, occupy approximately 300 million ha of the savanna regions of South America. The productivity of the pasture grasses is principally limited by the availability of P and N, and in the latter case it is rarely economically viable to apply N fertilizer. The introduction of pasture legumes into these pastures is seen as the best strategy to improve N nutrition of the grasses despite the difficulties to be overcome with persistence of the legume in the sward. The benefit to productivity comes not only from the improved quality of the animal diet when the legume is consumed, but also the N transferred to the grass in the litter and decaying roots of the legume, and there may be some direct transfer of fixed N from legume to grass. In our study the 15N isotope dilution (ID) and total N different tropical forage legumes and possible transfer of fixed N to the grass Brachiaria brizantha with three of them (a Centrosema hybrid, Galactia striata and Desmodium ovalifolium) in mixed swards. Amongst the legumes, Stylosanthes guianensis was found to obtain the largest contribution from BNF (between 75-97 kg N ha-1 in 97 days of growth), and kudzu (Pueraria phaseoloides) and D. ovalifolium were found to have a more limited capacity to obtain N from this source. In the mixed swards the 15N data suggested that over 30% of the N accumulated by the grass could be derived from N fixed by the associated legume, but these estimates should be treated with caution as the results suggested that there may be serious errors associated with the use of the 15N ID technique in the field to estimate this transfer of fixed N from legume to associated grass. MenosPastures, mainly dedicated to beef cattle production, occupy approximately 300 million ha of the savanna regions of South America. The productivity of the pasture grasses is principally limited by the availability of P and N, and in the latter case it is rarely economically viable to apply N fertilizer. The introduction of pasture legumes into these pastures is seen as the best strategy to improve N nutrition of the grasses despite the difficulties to be overcome with persistence of the legume in the sward. The benefit to productivity comes not only from the improved quality of the animal diet when the legume is consumed, but also the N transferred to the grass in the litter and decaying roots of the legume, and there may be some direct transfer of fixed N from legume to grass. In our study the 15N isotope dilution (ID) and total N different tropical forage legumes and possible transfer of fixed N to the grass Brachiaria brizantha with three of them (a Centrosema hybrid, Galactia striata and Desmodium ovalifolium) in mixed swards. Amongst the legumes, Stylosanthes guianensis was found to obtain the largest contribution from BNF (between 75-97 kg N ha-1 in 97 days of growth), and kudzu (Pueraria phaseoloides) and D. ovalifolium were found to have a more limited capacity to obtain N from this source. In the mixed swards the 15N data suggested that over 30% of the N accumulated by the grass could be derived from N fixed by the associated legume, but these estimates should be tr... Mostrar Tudo |
Palavras-Chave: |
BNF; FBN; Feed legumes; Fixação biologia de nitrogênio; Nitrogen fixing bacteria. |
Thesagro: |
Gramínea; Gramineae; Leguminosa Forrageira. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02455naa a2200253 a 4500 001 1620975 005 1999-03-15 008 1995 bl uuuu u00u1 u #d 100 1 $aVIERA-VARGAS, M. S. 245 $aQuantification of the contribution of N2 fixation to tropical forage legumes and transfer to associated grass. 260 $c1995 520 $aPastures, mainly dedicated to beef cattle production, occupy approximately 300 million ha of the savanna regions of South America. The productivity of the pasture grasses is principally limited by the availability of P and N, and in the latter case it is rarely economically viable to apply N fertilizer. The introduction of pasture legumes into these pastures is seen as the best strategy to improve N nutrition of the grasses despite the difficulties to be overcome with persistence of the legume in the sward. The benefit to productivity comes not only from the improved quality of the animal diet when the legume is consumed, but also the N transferred to the grass in the litter and decaying roots of the legume, and there may be some direct transfer of fixed N from legume to grass. In our study the 15N isotope dilution (ID) and total N different tropical forage legumes and possible transfer of fixed N to the grass Brachiaria brizantha with three of them (a Centrosema hybrid, Galactia striata and Desmodium ovalifolium) in mixed swards. Amongst the legumes, Stylosanthes guianensis was found to obtain the largest contribution from BNF (between 75-97 kg N ha-1 in 97 days of growth), and kudzu (Pueraria phaseoloides) and D. ovalifolium were found to have a more limited capacity to obtain N from this source. In the mixed swards the 15N data suggested that over 30% of the N accumulated by the grass could be derived from N fixed by the associated legume, but these estimates should be treated with caution as the results suggested that there may be serious errors associated with the use of the 15N ID technique in the field to estimate this transfer of fixed N from legume to associated grass. 650 $aGramínea 650 $aGramineae 650 $aLeguminosa Forrageira 653 $aBNF 653 $aFBN 653 $aFeed legumes 653 $aFixação biologia de nitrogênio 653 $aNitrogen fixing bacteria 700 1 $aSOUTO, C. M. 700 1 $aURQUIAGA, S. 700 1 $aBODDEY, R. M. 773 $tSoil Biology and Biochemistry, Oxford$gv. 27, n. 9, p. 1193-1200, 1995.
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Embrapa Agrobiologia (CNPAB) |
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Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
08/11/2017 |
Data da última atualização: |
01/02/2018 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
FRANÇA-NETO, J. B.; KRZYZANOWSKI, F. C.; LORINI, I.; HENNING, A. A.; HENNING, F. A.; PADUA, G. P.; OLIVEIRA, M. A. de; MANDARINO, J. M. G.; HIRAKURI, M. H.; BENASSI, V. T. |
Afiliação: |
JOSE DE BARROS FRANCA NETO, CNPSO; FRANCISCO CARLOS KRZYZANOWSKI, CNPSO; IRINEU LORINI, CNPSO; ADEMIR ASSIS HENNING, CNPSO; FERNANDO AUGUSTO HENNING, CNPSO; AUTOR; MARCELO ALVARES DE OLIVEIRA, CNPSO; JOSE MARCOS GONTIJO MANDARINO, CNPSO; MARCELO HIROSHI HIRAKURI, CNPSO; VERA DE TOLEDO BENASSI, CNPSO. |
Título: |
Determinação da qualidade fisiológica das sementes de soja colhidas no Brasil na safra 2015/16. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Informativo ABRATES, Londrina, v. 27, n.2, ago. 2017. Número especial. Edição dos Resumos do XX Congresso Brasileiro de Sementes, Foz do Iguaçu, 2017. |
Páginas: |
p. 355. |
Idioma: |
Português |
Palavras-Chave: |
Quality. |
Thesagro: |
Dano mecânico; Qualidade; Semente; Soja. |
Thesaurus NAL: |
Seeds; Soybeans. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 00958nam a2200301 a 4500 001 2079247 005 2018-02-01 008 2017 bl uuuu u00u1 u #d 100 1 $aFRANÇA-NETO, J. B. 245 $aDeterminação da qualidade fisiológica das sementes de soja colhidas no Brasil na safra 2015/16.$h[electronic resource] 260 $aInformativo ABRATES, Londrina, v. 27, n.2, ago. 2017. Número especial. Edição dos Resumos do XX Congresso Brasileiro de Sementes, Foz do Iguaçu, 2017.$c2017 300 $ap. 355. 650 $aSeeds 650 $aSoybeans 650 $aDano mecânico 650 $aQualidade 650 $aSemente 650 $aSoja 653 $aQuality 700 1 $aKRZYZANOWSKI, F. C. 700 1 $aLORINI, I. 700 1 $aHENNING, A. A. 700 1 $aHENNING, F. A. 700 1 $aPADUA, G. P. 700 1 $aOLIVEIRA, M. A. de 700 1 $aMANDARINO, J. M. G. 700 1 $aHIRAKURI, M. H. 700 1 $aBENASSI, V. T.
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