2010
DOI: 10.1590/s0100-06832010000400004
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Abstract: SUMMARYThe 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 13 C 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, organ… Show more

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Cited by 2 publications
(3 citation statements)
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References 20 publications
(17 reference statements)
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“…Thus, the application of silicate powder rocks directly in tropical soil can promove potential increase of the soil CEC (Anda et al 2009). In addition, the nature of composted materials, as well as the types of mineral enrichment of composts, might present an influence on humic substance generation (Lima et al 2010), possibly affecting the soil CEC and, consequently, the nutrient dynamics. Therefore, besides the active mechanisms of organic acids exudation connected to the intense microbial activity, the highest total K release, propitiated by the composts with powder phonolite, might be a reflex of the CEC increase of these sources when compared to the pure compost.…”
Section: Nutrient Release In Soil and Total Bioreleasementioning
confidence: 99%
“…Thus, the application of silicate powder rocks directly in tropical soil can promove potential increase of the soil CEC (Anda et al 2009). In addition, the nature of composted materials, as well as the types of mineral enrichment of composts, might present an influence on humic substance generation (Lima et al 2010), possibly affecting the soil CEC and, consequently, the nutrient dynamics. Therefore, besides the active mechanisms of organic acids exudation connected to the intense microbial activity, the highest total K release, propitiated by the composts with powder phonolite, might be a reflex of the CEC increase of these sources when compared to the pure compost.…”
Section: Nutrient Release In Soil and Total Bioreleasementioning
confidence: 99%
“…O teor de C da FAF apresentou pequena diferença entre os tratamentos enquanto o C da FAH, do tratamento TF, apresentou teores mais elevados, destacandose dos demais tratamentos. Esses resultados não se devem apenas aos aspectos quantitativos de FAH deste composto (Tabela 2), mas também às características qualitativas desta fração (Lima et al, 2010).…”
Section: Silício "Disponível"unclassified
“…O enriquecimento mineral dos resíduos de produção de biocombustíveis durante o processo de compostagem, utilizando-se pós de rocha de serpentinito e de macaxisto, pode contribuir tanto na elevação dos teores de Si nos compostos, como promover alterações na qualidade das SH, conferindolhe um potencial diferenciado na competição por sítios de adsorção de fosfato (Lima et al, 2010).…”
Section: Introductionunclassified