Contribution of humic substances from different composts to the synthesis of humin in a tropical soil

Revista Brasileira de Ciência do Solo

Claudivan Costa Lima²  Eduardo De Sá Mendonça¹  Asunción Roig¹ 

[1] ,Alagoas Federal Institute of Education Science and Technology Satuba AL ,Brazil

关键词: humic acids;    fulvic acids;    13C NMR;    alkyl groups;    recalcitrance;    ácidos húmicos;    ácidos fúlvicos;    13C RMN;    grupo alquil;    recalcitrância;   

DOI  :  10.1590/S0100-06832010000400004

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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