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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. |
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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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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Pecuária Sul. |
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Data corrente: |
31/07/2015 |
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Data da última atualização: |
08/03/2016 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
GENRO, T. C. M.; FARIA, B. M. de; PRATES, E. R.; BERNDT, A.; CEZIMBRA, I.; BAYER, C.; CARVALHO, P. C. de F. |
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Afiliação: |
TERESA CRISTINA MORAES GENRO, CPPSUL; Bruna Moscat de Faria, DOUTORANDA UFRGS; Ênio Rosa Prates, UFRGS; ALEXANDRE BERNDT, CPPSE; Ian Cezimbra, DOUTORANDO UFRGS; Cimélio Bayer, UFRGS; Paulo César de Faccio Carvalho, UFRGS. |
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Título: |
Intake and Methane Emission of beef cattle on natural pasture in Southern Brazil. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 52., 2015, Belo Horizonte. Zootecnia: otimizando recursos e potencialidades: anais. Brasília, DF: Sociedade Brasileira de Zootecnia, 2015. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Inglês |
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Thesagro: |
Bovino; Metano. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/127291/1/R0401-1.PDF
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Marc: |
LEADER 00741nam a2200205 a 4500
001 2021069
005 2016-03-08
008 2015 bl uuuu u00u1 u #d
100 1 $aGENRO, T. C. M.
245 $aIntake and Methane Emission of beef cattle on natural pasture in Southern Brazil.$h[electronic resource]
260 $aIn: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 52., 2015, Belo Horizonte. Zootecnia: otimizando recursos e potencialidades: anais. Brasília, DF: Sociedade Brasileira de Zootecnia$c2015
300 $c1 CD-ROM.
650 $aBovino
650 $aMetano
700 1 $aFARIA, B. M. de
700 1 $aPRATES, E. R.
700 1 $aBERNDT, A.
700 1 $aCEZIMBRA, I.
700 1 $aBAYER, C.
700 1 $aCARVALHO, P. C. de F.
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Embrapa Pecuária Sul (CPPSUL) |
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