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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
29/11/2020 |
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Data da última atualização: |
11/02/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SONG, G.; HAYES, M. H. B.; NOVOTNY, E. H. |
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Afiliação: |
GUIXUE SONG, SHANDONG UNIVERSITY; MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK; ETELVINO HENRIQUE NOVOTNY, CNPS. |
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Título: |
A two-year incubation study of transformations of crop residues into soil organic matter (SOM) and a procedure for the sequential isolation and the fractionation of components of SOM. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Science of the Total Environment, v. 763, 143034, Apr. 2021. |
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DOI: |
https://doi.org/10.1016/j.scitotenv.2020.143034 |
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Idioma: |
Inglês |
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Conteúdo: |
Maize (Zea mays) stover, with its natural C-13 abundance, was incubated for two years in a gravelly brown earth sandy loam soil that had been under long term cultivation to wheat (Triticum aestivum) for more than 30 years. The relative abundances of C-13 in the maize amendment allowed the contributions of the stover to be traced in the components of soil organic matter (SOM) isolated and fractionated using a sequential exhaustive extraction (SEE) process that gave 16 distinct fractions. These were caracterised using elemental, delta C-13, FTIR, and C-13 NMR analyses. Emphasis is placed on results for two years of incubation but to some extent data are compared with those for similar fractions taken after one year of incubation. Amounts of maize-derived organic carbon in the humic (HA) and fulvic (FA) isolates were more than twice those in the fractions after one year of incubation. The NMR results highlighted compositional differences between the fractions and showed increased contributions of lignin to the HAs and FAs (and especially in the cases of the HAs) as pH increased, and it was evident that humification was taking place after two years of incubation. The most recalcitrant humin fraction, isolated in the final solvent in the sequence, dimethylsulphoxide (DMSO) and sulfuric acid, is composed predominantly of methylene moieties, is compositionally and structurally very different from the humic and hydrophilic isolates, but identical to that which did not dissolve in the solvent. That suggests that exhaustively pre-extracting soil with the NaOH/urea solvent system used will allow a truly representative humin to be obtained using the DMSO/acid solvent system. MenosMaize (Zea mays) stover, with its natural C-13 abundance, was incubated for two years in a gravelly brown earth sandy loam soil that had been under long term cultivation to wheat (Triticum aestivum) for more than 30 years. The relative abundances of C-13 in the maize amendment allowed the contributions of the stover to be traced in the components of soil organic matter (SOM) isolated and fractionated using a sequential exhaustive extraction (SEE) process that gave 16 distinct fractions. These were caracterised using elemental, delta C-13, FTIR, and C-13 NMR analyses. Emphasis is placed on results for two years of incubation but to some extent data are compared with those for similar fractions taken after one year of incubation. Amounts of maize-derived organic carbon in the humic (HA) and fulvic (FA) isolates were more than twice those in the fractions after one year of incubation. The NMR results highlighted compositional differences between the fractions and showed increased contributions of lignin to the HAs and FAs (and especially in the cases of the HAs) as pH increased, and it was evident that humification was taking place after two years of incubation. The most recalcitrant humin fraction, isolated in the final solvent in the sequence, dimethylsulphoxide (DMSO) and sulfuric acid, is composed predominantly of methylene moieties, is compositionally and structurally very different from the humic and hydrophilic isolates, but identical to that which did not dissolve in th... Mostrar Tudo |
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Palavras-Chave: |
FTIR; NMR. |
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Thesagro: |
Extração; Matéria Orgânica; Solo. |
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Thesaurus Nal: |
Humification; Humin; Soil organic matter. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02519naa a2200253 a 4500
001 2127173
005 2021-02-11
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.scitotenv.2020.143034$2DOI
100 1 $aSONG, G.
245 $aA two-year incubation study of transformations of crop residues into soil organic matter (SOM) and a procedure for the sequential isolation and the fractionation of components of SOM.$h[electronic resource]
260 $c2021
520 $aMaize (Zea mays) stover, with its natural C-13 abundance, was incubated for two years in a gravelly brown earth sandy loam soil that had been under long term cultivation to wheat (Triticum aestivum) for more than 30 years. The relative abundances of C-13 in the maize amendment allowed the contributions of the stover to be traced in the components of soil organic matter (SOM) isolated and fractionated using a sequential exhaustive extraction (SEE) process that gave 16 distinct fractions. These were caracterised using elemental, delta C-13, FTIR, and C-13 NMR analyses. Emphasis is placed on results for two years of incubation but to some extent data are compared with those for similar fractions taken after one year of incubation. Amounts of maize-derived organic carbon in the humic (HA) and fulvic (FA) isolates were more than twice those in the fractions after one year of incubation. The NMR results highlighted compositional differences between the fractions and showed increased contributions of lignin to the HAs and FAs (and especially in the cases of the HAs) as pH increased, and it was evident that humification was taking place after two years of incubation. The most recalcitrant humin fraction, isolated in the final solvent in the sequence, dimethylsulphoxide (DMSO) and sulfuric acid, is composed predominantly of methylene moieties, is compositionally and structurally very different from the humic and hydrophilic isolates, but identical to that which did not dissolve in the solvent. That suggests that exhaustively pre-extracting soil with the NaOH/urea solvent system used will allow a truly representative humin to be obtained using the DMSO/acid solvent system.
650 $aHumification
650 $aHumin
650 $aSoil organic matter
650 $aExtração
650 $aMatéria Orgânica
650 $aSolo
653 $aFTIR
653 $aNMR
700 1 $aHAYES, M. H. B.
700 1 $aNOVOTNY, E. H.
773 $tScience of the Total Environment$gv. 763, 143034, Apr. 2021.
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Registro original: |
Embrapa Solos (CNPS) |
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Biblioteca |
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Origem |
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Classificação |
Cutter |
Registro |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente; Embrapa Pesca e Aquicultura. |
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Data corrente: |
05/03/2012 |
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Data da última atualização: |
22/03/2012 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
FRASCÁ-SCORVO, C. M. D.; LOSEKANN, M. E.; SCORVO FILHO, J. D.; QUEIROZ, J. F. de; LUIZ, A. J. B.; DONADELLI, A.; TURCO, P. H. N.; SAMPAIO, F. G. |
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Afiliação: |
CÉLIA M. D. FRASCÁ-SCORVO, APTA Regional do Leste Paulista; MARCOS ELISEU LOSEKANN, CNPMA; JOÃO DONATO SCORVO FILHO, APTA Regional do Leste Paulista; JULIO FERRAZ DE QUEIROZ, CNPMA; ALFREDO JOSE BARRETO LUIZ, CNPMA; ALCEU DONADELLI, APTA Regional do Leste Paulista; PATRÍCIA HELENA N. TURCO, APTA Regional do Leste Paulista; FERNANDA GARCIA SAMPAIO, CNPASA. |
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Título: |
Effects of feeding frequency on the productive performance of different tilapia strains. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: SIMPÓSIO INTERNACIONAL DE NUTRIÇÃO E SAÚDE DE PEIXES, 4., 2011, Botucatu. Anais... Botucatu: Universidade Estadual Paulista, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
This study was conducted during 251 days from April 13th to December 20th in 2010, and it aimed the evaluation of zootechnical performance of three tilapia strains submitted to two feeding frequencies, fed twice a day (2x) and fed once a day (1x). |
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Thesagro: |
Tilapia. |
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Thesaurus NAL: |
Feeding frequency; Tilapia (Cichlidae). |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55053/1/2011RA011.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55296/1/cnpasa1.pdf
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Marc: |
LEADER 01029nam a2200229 a 4500
001 1917481
005 2012-03-22
008 2011 bl uuuu u00u1 u #d
100 1 $aFRASCÁ-SCORVO, C. M. D.
245 $aEffects of feeding frequency on the productive performance of different tilapia strains.$h[electronic resource]
260 $aIn: SIMPÓSIO INTERNACIONAL DE NUTRIÇÃO E SAÚDE DE PEIXES, 4., 2011, Botucatu. Anais... Botucatu: Universidade Estadual Paulista$c2011
520 $aThis study was conducted during 251 days from April 13th to December 20th in 2010, and it aimed the evaluation of zootechnical performance of three tilapia strains submitted to two feeding frequencies, fed twice a day (2x) and fed once a day (1x).
650 $aFeeding frequency
650 $aTilapia (Cichlidae)
650 $aTilapia
700 1 $aLOSEKANN, M. E.
700 1 $aSCORVO FILHO, J. D.
700 1 $aQUEIROZ, J. F. de
700 1 $aLUIZ, A. J. B.
700 1 $aDONADELLI, A.
700 1 $aTURCO, P. H. N.
700 1 $aSAMPAIO, F. G.
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Embrapa Meio Ambiente (CNPMA) |
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