| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Solo
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| País: |
Brazil
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| Título: |
Contribution of humic substances from different composts to the synthesis of humin in a tropical soil
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| Autores: |
Lima,Claudivan Costa
Mendonça,Eduardo de Sá
Roig,Asunción
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| Data: |
2010-08-01
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| Ano: |
2010
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| Palavras-chave: |
Humic acids
Fulvic acids
13C NMR
Alkyl groups
Recalcitrance
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| Resumo: |
The contribution of humic substances of different composts to the synthesis of humin in a tropical soil was evaluated. Increasing doses (0, 13, 26, 52, and 104 Mg ha-1) of five different composts consisting of agroinpowderrial residues were applied to a Red-Yellow Latosol. These composts were chemically characterized and 13C NMR determined and the quantity of the functional alkyl groups of humic acids applied to the soil as compost was estimated. Thirty days after application of the treatments, organic matter samples were collected for fractionation of humic acids (HA), fulvic acids (FA) and humin (HU), from which the ratios HA/FA and (HA + FA)/HU were calculated. The application of the composts based on castor cake resulted in the highest HU levels in the soil; alkyl groups of the HA fraction of the composts were predominant in the organic components added to the HU soil fraction.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400004
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| Editor: |
Sociedade Brasileira de Ciência do Solo
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| Relação: |
10.1590/S0100-06832010000400004
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Ciência do Solo v.34 n.4 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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