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Registro Completo |
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Biblioteca(s): |
Embrapa Amapá; Embrapa Mandioca e Fruticultura; Embrapa Meio-Norte; Embrapa Semiárido. |
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Data corrente: |
15/01/2001 |
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Data da última atualização: |
15/02/2013 |
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Autoria: |
COSTA, J. B.; SILVA, V. G. da; RODRIGUES, F. de M.; SILVA, U. R. da. |
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Título: |
Efeito da uréia associada à mistura mineral e do feno de mandioca sobre o ganho do peso de novilhos. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Salvador: EPABA, 1985. |
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Páginas: |
4 p. |
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Série: |
(EPABA. Pesquisa em andamento, 21). |
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Idioma: |
Português |
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Conteúdo: |
No Nordeste, como nos climas tropicais de um modo geral, a utilizacao de pastagem cultivada e influenciada especialmente pelos fatores climaticos que determinam uma oscilacao na producao e qualidade das forrageiras. Verifica-se, no periodo chuvoso, uma excessiva producao de forragem de alto valor nutritivo e, na seca, uma baixa producao e decrescimo na qualidade nutricional. Esta epoca seca do ano representa, portanto, a fase dificil na alimentacao do rebanho bovino mantido em regime exlusivo de pastejo. Contudo, a disponibilidade de forragem na seca pode ser influenciada tambem pelo manejo dispensado as pastagens. |
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Palavras-Chave: |
Alimentacao animal; Bullock; Feed. |
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Thesagro: |
Alimentação; Feno; Gado; Ganho de Peso; Mandioca; Mistura Mineral; Novilho; Nutrição Animal; Ração; Suplemento Alimentar; Uréia. |
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Thesaurus Nal: |
animal nutrition; cassava. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01558nam a2200361 a 4500
001 1350478
005 2013-02-15
008 1985 bl uuuu u0uu1 u #d
100 1 $aCOSTA, J. B.
245 $aEfeito da uréia associada à mistura mineral e do feno de mandioca sobre o ganho do peso de novilhos.
260 $aSalvador: EPABA$c1985
300 $a4 p.
490 $a(EPABA. Pesquisa em andamento, 21).
520 $aNo Nordeste, como nos climas tropicais de um modo geral, a utilizacao de pastagem cultivada e influenciada especialmente pelos fatores climaticos que determinam uma oscilacao na producao e qualidade das forrageiras. Verifica-se, no periodo chuvoso, uma excessiva producao de forragem de alto valor nutritivo e, na seca, uma baixa producao e decrescimo na qualidade nutricional. Esta epoca seca do ano representa, portanto, a fase dificil na alimentacao do rebanho bovino mantido em regime exlusivo de pastejo. Contudo, a disponibilidade de forragem na seca pode ser influenciada tambem pelo manejo dispensado as pastagens.
650 $aanimal nutrition
650 $acassava
650 $aAlimentação
650 $aFeno
650 $aGado
650 $aGanho de Peso
650 $aMandioca
650 $aMistura Mineral
650 $aNovilho
650 $aNutrição Animal
650 $aRação
650 $aSuplemento Alimentar
650 $aUréia
653 $aAlimentacao animal
653 $aBullock
653 $aFeed
700 1 $aSILVA, V. G. da
700 1 $aRODRIGUES, F. de M.
700 1 $aSILVA, U. R. da
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Registro original: |
Embrapa Amapá (CPAF-AP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Florestas; Embrapa Solos. |
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Data corrente: |
27/02/2013 |
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Data da última atualização: |
26/09/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ALHO, C. F. B. V.; AUCCAISE, R.; MAIA, C. M. B. de F.; NOVOTNY, E. H.; LELIS, R. C. C. |
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Afiliação: |
CARLOS FRANCISCO BRAZÃO VIEIRA ALHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; RUBEN AUCCAISE, BOLSISTA CNPS; CLAUDIA MARIA BRANCO DE F MAIA, CNPF; ETELVINO HENRIQUE NOVOTNY, CNPS; ROBERTO CARLOS COSTA LELIS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
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Título: |
Using solid state 13C NMR to study pyrolysis final temperature effects on biochar stability. |
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Ano de publicação: |
2013 |
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Fonte/Imprenta: |
In: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011. |
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DOI: |
https://doi.org/10.1007/978-94-007-5634-2_186 |
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Idioma: |
Inglês |
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Conteúdo: |
Recent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures. MenosRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altere... Mostrar Tudo |
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Palavras-Chave: |
Forest residues; NMR; Organic matter stability; Pyrogenic carbon. |
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Thesaurus NAL: |
biochar. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02379nam a2200229 a 4500
001 2156892
005 2023-09-26
008 2013 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1007/978-94-007-5634-2_186$2DOI
100 1 $aALHO, C. F. B. V.
245 $aUsing solid state 13C NMR to study pyrolysis final temperature effects on biochar stability.$h[electronic resource]
260 $aIn: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011.$c1011
520 $aRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures.
650 $abiochar
653 $aForest residues
653 $aNMR
653 $aOrganic matter stability
653 $aPyrogenic carbon
700 1 $aAUCCAISE, R.
700 1 $aMAIA, C. M. B. de F.
700 1 $aNOVOTNY, E. H.
700 1 $aLELIS, R. C. C.
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Registro original: |
Embrapa Florestas (CNPF) |
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