Distribution of chemical compartments of soil organic matter and c stocks of a cambisol from south Brazil as affected by Pinus afforestation

Distribution of chemical compartments of soil organic matter and c stocks of a cambisol from south Brazil as affected by Pinus afforestation

Distribution and stocks of soil organic matter (SOM) compartments after Pinus monoculture introduction in a native pasture area of a Cambisol, Santa Catarina, Brazil, were investigated. Pinus introduction increased soil acidity, content of exchangeable Al+3 and diminished soil nutrients. Nevertheles...

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Bibliographic Details
Main Authors: Henrique Cesar Almeida, Deborah Pinheiro Dick, Francielle Leonardelli Bertotto, Guilherme Silva Chitarra
Format: Article
Language:English
Published: Sociedade Brasileira de Química 2012-01-01
Series:Química Nova
Subjects:
humic substances
humin fractions
chemical composition
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000700009&lng=en&tlng=en
Description
Summary:Distribution and stocks of soil organic matter (SOM) compartments after Pinus monoculture introduction in a native pasture area of a Cambisol, Santa Catarina, Brazil, were investigated. Pinus introduction increased soil acidity, content of exchangeable Al+3 and diminished soil nutrients. Nevertheless, soil C stock increased in all humic fractions of the 0-5 cm layer after Pinus afforestation. In the subsurface, the vegetation change only promoted SOM redistribution from the NaOH-extractable humic substances to a less hydrophobic humin fraction. Under Pinus, soil organo-mineral interactions were relevant up to a 15 cm depth, while in pasture environment, this mechanism occurred mainly in the surface layer.
ISSN:1678-7064

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