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| Registros recuperados : 61 | |
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| 24. | | ZOTARELLI, L.; FERREIRA, E.; OLIVEIRA, O. C. de; BODDEY, Robert M.; URQUIAGA, Segundo; ALVES, Bruno J. R. Limitacao de nitrogenio na decomposicao da materia organica do solo de uma pastagem degradada de Panicum maximum. In: SIMPOSIO NACIONAL DE RECUPERACAO DE AREAS DEGRADADAS - SINRAD, 3., maio 1997, Ouro Preto. Anais... Vicosa: SOBRADE; UFV/DPS/DEF, 1997. p.118-124.| Biblioteca(s): Embrapa Agrobiologia. |
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| 30. | | FERREIRA, E.; LOPES, W.; MOTA, R. S. S.; TARRE, R.; MACEDO, R.; OLIVEIRA, O. C. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. Ciclagem de nitrogênio das fezes bovinas no periodo seco, em pastagem de Brachiaria decumbens Stapf. Prain. Fl., localizada no ecossistema de cerrado em Santo Antonio de Goias-Goias. In: REUNIÃO BRASILEIRA DE MANEJO E CONSERVAÇÃO DO SOLO E DA ÁGUA, 13., 2000, Ilhéus. Resumos... Ilhéus: CEPLAC/CEPEC, 2000. p. 791-792. CD ROM.| Biblioteca(s): Embrapa Agrobiologia. |
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| 32. | | FASIABEN, M. do C. R.; OLIVEIRA, S. R. de M.; MORAES, A. S.; ALMEIDA, M. M. T. B.; OLIVEIRA, O. C. de; EUSÉBIO, G. dos S. Diferenciação e caracterização de municípios produtores de bovinos de corte no bioma Mata Atlântica segundo o Censo Agropecuário 2017. In: CONGRESSO BRASILEIRO DE AGROINFORMÁTICA, 13., 2021, Bagé. Anais... Bagé: Unipampa, 2021. p. 80-89. Organizado por Ana Paula Lüdtke Ferreira.| Biblioteca(s): Embrapa Soja. |
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| 40. | | MIELE, M.; ALMEIDA, M. M. T. B.; MONTICELLI, C. J.; OLIVEIRA, O. C. de; BOFF, J. A.; PALHARES, J. C. P.; SANDI, A. J.; CARDOSO, L. S. Caracterização da suinocultura no Brasil a partir do censo agropecuário 2006 do IBGE. Concórdia: Embrapa Suínos e Aves, 2013. 149 p. (Embrapa Suínos e Aves. Documentos, 160).| Biblioteca(s): Embrapa Suínos e Aves; Embrapa Unidades Centrais. |
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| Registros recuperados : 61 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
26/02/2001 |
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Data da última atualização: |
26/02/2001 |
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Autoria: |
REIS, V. M.; REIS JÚNIOR, F. B. dos; QUESADA, D. M.; OLIVEIRA, O. C. de; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Título: |
Biological nitrogen fixation associated with tropical pasture grasses. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Australian Journal of Plant Physiology, Victoria, v. 28, n. 9, p. 837-844, 2001. |
|
Idioma: |
Inglês |
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Conteúdo: |
The semi-humid or humid tropics are ideal for the production of large quantities of biomass from fast-growing C4 grasses, but high yields normally require large quantities of fertiliser, especially N, which has a very high input from fossil fuels (natural gas). A program has been started recently to use elephant grass (Pennísetum purpureum Schum.) to substitutefirewood as a fuel and also to make charcoal for iron production. In this case, any large N fertiliser additions would mean that the yield of bio fuel per unit of fossil fuel invested would bc detrimentally affected. In this study, we report on the potential for the selection of genotypes of fast-growing C4 tropical grasses of the genera Pennisetum and Brachiaria for their capacity to obtain N inputs from plant-associated biological nitrogen fixation (BNF). Fourteen genotypes each of Brachiaria and Pennisetum were screened for BNF contributions by growing them in 15N-labelled soil. In the case of the Pennisetum, after a suitable cuning height for the crop had been selected, there were large differences in dry matter production, N accumulation and 15N enrichment. The differences in 15N enrichment between genotypes were statistically significant and BNF inputs were estimated as high as 41% of accumulated N. In the study on Brachiaria genotypes, potential inputs of BNF seemed lower. Only one or two genotypes of B. brizantha and B. ruziziensis obtained more then 20% of their N from BNF. The N2-fixing bacteria that were most commonly associated with shoots and roots the Pennísetum genotypes were of the genus Herbaspirillum, but predominantly of a recently described new species. The Brachíaria spp. from three different sites! Rio de Janeiro, Goânia, Bahia) were predominately colonised by Azospirillum spp., most of the isolates being of the species Azospirillum amazonense. Very few Herbaspirilla were isolated from these plants. MenosThe semi-humid or humid tropics are ideal for the production of large quantities of biomass from fast-growing C4 grasses, but high yields normally require large quantities of fertiliser, especially N, which has a very high input from fossil fuels (natural gas). A program has been started recently to use elephant grass (Pennísetum purpureum Schum.) to substitutefirewood as a fuel and also to make charcoal for iron production. In this case, any large N fertiliser additions would mean that the yield of bio fuel per unit of fossil fuel invested would bc detrimentally affected. In this study, we report on the potential for the selection of genotypes of fast-growing C4 tropical grasses of the genera Pennisetum and Brachiaria for their capacity to obtain N inputs from plant-associated biological nitrogen fixation (BNF). Fourteen genotypes each of Brachiaria and Pennisetum were screened for BNF contributions by growing them in 15N-labelled soil. In the case of the Pennisetum, after a suitable cuning height for the crop had been selected, there were large differences in dry matter production, N accumulation and 15N enrichment. The differences in 15N enrichment between genotypes were statistically significant and BNF inputs were estimated as high as 41% of accumulated N. In the study on Brachiaria genotypes, potential inputs of BNF seemed lower. Only one or two genotypes of B. brizantha and B. ruziziensis obtained more then 20% of their N from BNF. The N2-fixing bacteria that were mos... Mostrar Tudo |
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Palavras-Chave: |
Biological nitrogen fixation; BNF; Elephant grass; FBN; Fixação biológica de nitrogênio. |
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Thesagro: |
Capim Elefante; Gramínea Tropical; Pennisetum Purpureum. |
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Thesaurus NAL: |
grasses. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02777naa a2200301 a 4500
001 1598478
005 2001-02-26
008 2001 bl --- 0-- u #d
100 1 $aREIS, V. M.
245 $aBiological nitrogen fixation associated with tropical pasture grasses.
260 $c2001
520 $aThe semi-humid or humid tropics are ideal for the production of large quantities of biomass from fast-growing C4 grasses, but high yields normally require large quantities of fertiliser, especially N, which has a very high input from fossil fuels (natural gas). A program has been started recently to use elephant grass (Pennísetum purpureum Schum.) to substitutefirewood as a fuel and also to make charcoal for iron production. In this case, any large N fertiliser additions would mean that the yield of bio fuel per unit of fossil fuel invested would bc detrimentally affected. In this study, we report on the potential for the selection of genotypes of fast-growing C4 tropical grasses of the genera Pennisetum and Brachiaria for their capacity to obtain N inputs from plant-associated biological nitrogen fixation (BNF). Fourteen genotypes each of Brachiaria and Pennisetum were screened for BNF contributions by growing them in 15N-labelled soil. In the case of the Pennisetum, after a suitable cuning height for the crop had been selected, there were large differences in dry matter production, N accumulation and 15N enrichment. The differences in 15N enrichment between genotypes were statistically significant and BNF inputs were estimated as high as 41% of accumulated N. In the study on Brachiaria genotypes, potential inputs of BNF seemed lower. Only one or two genotypes of B. brizantha and B. ruziziensis obtained more then 20% of their N from BNF. The N2-fixing bacteria that were most commonly associated with shoots and roots the Pennísetum genotypes were of the genus Herbaspirillum, but predominantly of a recently described new species. The Brachíaria spp. from three different sites! Rio de Janeiro, Goânia, Bahia) were predominately colonised by Azospirillum spp., most of the isolates being of the species Azospirillum amazonense. Very few Herbaspirilla were isolated from these plants.
650 $agrasses
650 $aCapim Elefante
650 $aGramínea Tropical
650 $aPennisetum Purpureum
653 $aBiological nitrogen fixation
653 $aBNF
653 $aElephant grass
653 $aFBN
653 $aFixação biológica de nitrogênio
700 1 $aREIS JÚNIOR, F. B. dos
700 1 $aQUESADA, D. M.
700 1 $aOLIVEIRA, O. C. de
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tAustralian Journal of Plant Physiology, Victoria$gv. 28, n. 9, p. 837-844, 2001.
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