Data/hora: 13/06/2024 00:52:40

Provedor de dados: 	90	
País: 	Brazil	
Título: 	Contribution of humic substances from different composts to the synthesis of humin in a tropical soil	
Autores: 	Lima,Claudivan Costa; Mendonça,Eduardo de Sá; Roig,Asunción.	
Data: 	2010-08-01	
Ano: 	2010	
Palavras-chave: 	Humic acids; Fulvic acids; 13C NMR; Alkyl groups; Recalcitrance.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000400004	
Editor: 	Sociedade Brasileira de Ciência do Solo	
Relação: 	10.1590/S0100-06832010000400004	
Formato: 	text/html	
Fonte: 	Revista Brasileira de Ciência do Solo  v.34 n.4 2010	
Fonte: 	info:eu-repo/semantics/openAccess