DISTRIBUTION OF CHEMICAL COMPARTMENTS OF SOIL ORGANIC MATTER AND C STOCKS OF A CAMBISOL FROM SOUTH BRAZIL AS AFFECTED BY Pinus AFFORESTATION

被引：8
|
作者：
Almeida, Henrique Cesar [1 ]
Dick, Deborah Pinheiro [1 ]
Bertotto, Francielle Leonardelli [1 ]
Chitarra, Guilherme Silva [1 ]
机构：
[1] Univ Fed Rio Grande do Sul, Inst Quim, Dept Fis Quim, BR-91501970 Porto Alegre, RS, Brazil
来源：
QUIMICA NOVA | 2012年 / 35卷 / 07期
关键词：
humic substances; humin fractions; chemical composition; HUMIC SUBSTANCES; CARBON; EUCALYPTUS; FOREST; DYNAMICS; NITROGEN; PASTURE; ATTRIBUTES; PLANTATION; MANAGEMENT;
D O I：
10.1590/S0100-40422012000700009
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：1329 / 1335
页数：7
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