Data/hora: 01/06/2024 14:30:24

Biblioteca(s): | Embrapa Solos.
Data corrente: | 12/01/2009
Data da última atualização: | 06/04/2022
Autoria: | SONG, G.; NOVOTNY, E. H.; HAYES, M. H. B.; AZEVEDO, E. R. de; BONAGAMBA, T. J.
Afiliação: | GUIXUE SONG, UNIVERSITY OF LIMERICK; ETELVINO HENRIQUE NOVOTNY, CNPS; MICHAEL H. B. HAYES, UNIVERSITY OF LIMERICK; EDUARDO RIBEIRO DE AZEVEDO, USP; TITO J. BONAGAMBA, USP.
Título: | Char and humin fractions in Amazonian dark earths.
Ano de publicação: | 2008
Fonte/Imprenta: | In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 14., 2008, Saint Petersburg. From molecular understanding to innovative applications of humic substances: proceedings... Moscow: Lomonosov Moscow State University, 2008. v. 1, p. 311-314.
Idioma: | Inglês
Conteúdo: | The high and specific SOM contents of the Amazonian Dark Earths (ADE, Terra Preta de Índios), and their high contents of P and Ca provide high natural fertility to the soils. Char or black carbon (B C) plays a major role for the SOM stability in ADE soils (1) and it also provides a significant potential for carbon sequestration and sustainable ecosystems (2). There are several studies of the humic acids (HAs) of ADE soils (e.g., 3 and 4). However, because of the difficulties in isolation, there is less awareness of humin, the most abundant SOM component, and of the interaction mechanisms of recalcitrant BC with SOM (especially humin) and clays. In this study, humic materials were extracted using the IHSS procedure and by exhaustive sequential extraction procedures. Isotopic 13C analyses, and solid-state 13C NMR spectroscopy were used for characterizations.
Palavras-Chave: | Amazonian dark earth; black carbon; char; NMR.
Thesaurus Nal: | dimethyl sulfoxide; humin; urea.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/334788/1/Char-and-humin-fractions-in-Amazonian-dark-earths-2008.pdf
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (13614-1) - UPC - AA - DD -  -  - 2009.00079 - DIS