Título:	Soil organic matter and fertility of anthropogenic dark earths (Terra Preta de Índio) in the Brazilian Amazon basin.
Autor:	CUNHA, T. J. F. MADARI, B. E. CANELLAS, L. P. RIBEIRO, L. P. BENITES, V. de M. SANTOS, G. de A.
Afiliación:	TONY JARBAS FERREIRA CUNHA, CPATSA BEATA EMOKE MADARI, CNPAF LUCIANO PASQUALOTO CANELLAS, UNIVERSIDADE DO NORTE FLUMINENSE LUCEDINO PAIXÃO RIBEIRO, UNIVERSIDADE FEDERAL DA BAHIA VINICIUS DE MELO BENITES, CNPS GABRIEL DE ARAÚJO SANTOS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO.
Año:	2009
Referencia:	Revista Brasileira de Ciência do Solo, v. 33. n. 1, p. 85-93, 2009.
Descripción:	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 cmolc kg-1, CEC: 17.2-17.5 cmolc 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 cmolc kg-1, CEC: 9.5 cmolc 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.
Thesagro:	Carbono Fertilidade Matéria Orgânica Manejo Solo
NAL Thesaurus:	Soil
Palabras clave:	Substância húmica Fração humina Bacia Amazônica
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPATSA)