| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
|
Data corrente: |
30/04/2004 |
|
Data da última atualização: |
19/12/2007 |
|
Autoria: |
DOSSA, D.; MONTOYA VILCAHUAMAN, L. J. |
|
Título: |
A Atividade florestal e agroflorestal como alternativas de renda aos produtores rurais. |
|
Ano de publicação: |
2001 |
|
Fonte/Imprenta: |
Colombo, PR: Embrapa Florestas, 2001. |
|
Páginas: |
6 p. |
|
Descrição Física: |
il. |
|
Série: |
(Embrapa Florestas. Circular Técnica, 53). |
|
Idioma: |
Português |
|
Conteúdo: |
Objetiva analisar três sistemas de produção florestal e agroflorestal para identificar aqueles que apresentam maior sustentabilidade no longo prazo. |
|
Palavras-Chave: |
Floresta - Sistema de Produção; Sistema Agrolflorestal. |
|
Thesagro: |
Floresta. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 00737naa a2200193 a 4500
001 1371545
005 2007-12-19
008 2001 bl --- 0-- u #d
100 1 $aDOSSA, D.
245 $aA Atividade florestal e agroflorestal como alternativas de renda aos produtores rurais.
260 $c2001
300 $a6 p.$cil.
490 $a(Embrapa Florestas. Circular Técnica, 53).
520 $aObjetiva analisar três sistemas de produção florestal e agroflorestal para identificar aqueles que apresentam maior sustentabilidade no longo prazo.
650 $aFloresta
653 $aFloresta - Sistema de Produção
653 $aSistema Agrolflorestal
700 1 $aMONTOYA VILCAHUAMAN, L. J.
773 $tColombo, PR: Embrapa Florestas, 2001.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Tabuleiros Costeiros (CPATC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Solos. |
|
Data corrente: |
10/01/2007 |
|
Data da última atualização: |
20/10/2021 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
Internacional - A |
|
Autoria: |
SIMPSON, A. J.; SONG, G.; SMITH, E.; LAM, B.; NOVOTNY, E. H.; HAYES, M. H. B. |
|
Afiliação: |
ANDRE J. SIMPSON, UNIVERSITY OF TORONTO; GUIXUE SONG, UNIVERSITY OF LIMERICK; EMMA SMITH, UNIVERSITY OF TORONTO; BUUAN LAM, UNIVERSITY OF TORONTO; ETELVINO HENRIQUE NOVOTNY, CNPS; MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK. |
|
Título: |
Unraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy. |
|
Ano de publicação: |
2007 |
|
Fonte/Imprenta: |
Environmental Science & Technology, v. 41, n. 3, p. 876-883, Feb. 2007. |
|
DOI: |
https://doi.org/10.1021/es061576c |
|
Idioma: |
Inglês |
|
Conteúdo: |
Humin is the most recalcitrant and least understood fraction of soil organic matter. By definition, humin is that fraction not extracted by traditional aqueous alkaline soil extractants. Here we show that >_70% of the traditional humin fraction is solubilized when 0.1 M NaOH + 6 M urea and dimethyl sulfoxide (DMSO) + 6% H2SO4 are used in series after conventional extraction. Multidimensional solution-state NMR is applied in this study to gain an understanding of the major constituents present in these "solubilized humin fractions". The spectra indicated strong contributions from five main categories of components, namely. peptides, aliphatic species, carbohydrates, peptidoglycan, and lignin. Diffusion edited spectroscopy indicated that all species are present as macromolecules (or stable aggregate species). Although the distribution of the components is generally similar, peptidoglycan is present at significant levels supporting a higher microbial contribution to humin than to humic and fulvic fractions. The abundance of plant- and microbial-derived materials found does not exclude "humic" materials (e.g., oxidized lignin) or the presence of novel compounds at lower concentrations but suggests that a large proportion of humin is formed from classes of known compounds and parent biopolymers. |
|
Palavras-Chave: |
Organic polymers. |
|
Thesaurus NAL: |
Biopolymers; Carbohydrates; Peptides; Proteins; Soil. |
|
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
|
Marc: |
LEADER 02103naa a2200265 a 4500
001 1339170
005 2021-10-20
008 2007 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1021/es061576c$2DOI
100 1 $aSIMPSON, A. J.
245 $aUnraveling the structural components of soil humin by use of solution-state nuclear magnetic resonance spectroscopy.$h[electronic resource]
260 $c2007
520 $aHumin is the most recalcitrant and least understood fraction of soil organic matter. By definition, humin is that fraction not extracted by traditional aqueous alkaline soil extractants. Here we show that >_70% of the traditional humin fraction is solubilized when 0.1 M NaOH + 6 M urea and dimethyl sulfoxide (DMSO) + 6% H2SO4 are used in series after conventional extraction. Multidimensional solution-state NMR is applied in this study to gain an understanding of the major constituents present in these "solubilized humin fractions". The spectra indicated strong contributions from five main categories of components, namely. peptides, aliphatic species, carbohydrates, peptidoglycan, and lignin. Diffusion edited spectroscopy indicated that all species are present as macromolecules (or stable aggregate species). Although the distribution of the components is generally similar, peptidoglycan is present at significant levels supporting a higher microbial contribution to humin than to humic and fulvic fractions. The abundance of plant- and microbial-derived materials found does not exclude "humic" materials (e.g., oxidized lignin) or the presence of novel compounds at lower concentrations but suggests that a large proportion of humin is formed from classes of known compounds and parent biopolymers.
650 $aBiopolymers
650 $aCarbohydrates
650 $aPeptides
650 $aProteins
650 $aSoil
653 $aOrganic polymers
700 1 $aSONG, G.
700 1 $aSMITH, E.
700 1 $aLAM, B.
700 1 $aNOVOTNY, E. H.
700 1 $aHAYES, M. H. B.
773 $tEnvironmental Science & Technology$gv. 41, n. 3, p. 876-883, Feb. 2007.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Solos (CNPS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
