Data/hora: 11/06/2024 16:39:08

Provedor de dados: | 90
País: | Brazil
Título: | Soil organic matter and fertility of anthropogenic dark earths (Terra Preta de Índio) in the Brazilian Amazon basin
Autores: | Cunha,Tony Jarbas Ferreira; Madari,Beata Emoke; Canellas,Luciano Pasqualoto; Ribeiro,Lucedino Paixão; Benites,Vinicius de Melo; Santos,Gabriel de Araújo.
Data: | 2009-02-01
Ano: | 2009
Palavras-chave: | Humic substances; Humin fraction; Cation exchange capacity; Total soil carbon.
Resumo: | Fertility properties, total C (Ctot), and chemical soil organic matter fractions (fulvic acid fraction - FA, humic acid fraction - HA, humin fraction - H) of anthropogenic dark earths (Terra Preta de Índio) of the Amazon basin were compared with those of Ferralsols with no anthropogenic A horizon. Terra Preta soils had a higher fertility (pH: 5.1-5.4; Sum of bases, SB: 8.93-10.33 cmol c kg-1 , CEC: 17.2-17.5 cmol c kg-1 , V: 51-59 %, P: 116-291 mg kg-1) and Ctot (44.6-44.7 g kg-1) than adjacent Ferralsols (pH: 4.4; SB: 2.04 cmol c kg-1, CEC: 9.5 cmol c kg-1, V: 21 %, P 5 mg kg-1, C: 37.9 g kg-1). The C distribution among humic substance fractions (FA, HA, H) in Terra Preta soils was also different, as shown by the ratios HA:FA and EA/H (EA=HA+FA) (2.1-3.0 and 1.06-1.08 for Terra Preta and 1.2 and 0.72 for Ferralsols, respectively). While the cation exchange capacity (CEC), of Ferralsols correlated with FA (r = 0.97), the CEC of Terra Preta correlated with H (r = 0.82). The correlation of the fertility of Terra Preta with the highly stable soil organic matter fraction (H) is highly significant for the development of sustainable soil fertility management models in tropical ecosystems.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000100009
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832009000100009
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.33 n.1 2009
Fonte: | info:eu-repo/semantics/openAccess