Title:	Carbon in physical fractions and organic matter chemical composition of an acrisol after amazon forest burning and conversion into pasture.
Authors:	LEAL, O. A. DICK, D. P. COSTA, F. de S. KNICKER, H. CARVALHO JÚNIOR, J. A. de SANTOS, J. C.
Affiliation:	Otávio A. Leal, Instituto Federal Catarinense (IFC); Deborah P. Dick, Universidade Federal do Rio Grande do Sul (UFRGS); FALBERNI DE SOUZA COSTA, CPAF-AC; Heike Knicker, Instituto de Recursos Naturales y Agrobiología de Sevilla; João A. de Carvalho Júnior, Universidade Estadual Paulista (UNESP); José C. Santos, Instituto Nacional de Pesquisas Espaciais (INPE).
Date Issued:	2019
Citation:	Journal of the Brazilian Chemical Society, v. 30, n. 2, p. 413-424, 2019.
Description:	The aim of this study was to investigate impacts of Amazon Forest (AF) fire and conversion to pasture on carbon accumulation in particle size fractions and organic matter (OM) composition of an Acrisol. Soil samples were collected (0.00-2.00 m depth) in three sites: native AF (NAF); AF under natural regeneration for two years after burning (BAF); 23-years old Brachiaria pasture after AF burning (BRA). Assuming NAF area as reference, BAF and BRA areas showed negative carbon balance when carbon emitted to the atmosphere at AF burning is taken into account. Soil OM aromaticity and hydrophobicity, assessed via 13C nuclear magnetic resonance, in BRA and BAF were similar to that in NAF. Fire and post-fire land use altered the carbon distribution in sand, silt and clay along the soil profile and seem to have affected organo-mineral and OM self-assemblage interactions, since the relation between total soil carbon and carbon in clay was asymptotic in BAF and linear in NAF and BRA.
Thesagro:	Floresta Tropical Fogo Impacto Ambiental Regeneração Natural Matéria Orgânica Carbono Estoque Argissolos Saturação
NAL Thesaurus:	Tropical rain forests Burnt soils Environmental impact Natural regeneration Soil organic matter Carbon sinks Acrisols
Keywords:	Bosque tropical húmedo Suelos quemados Regeneración natural Materia orgánica del suelo Reservorios de carbono Acrisoles Fazenda Santa Luzia Cruzeiro do Sul (AC) Acre Amazônia Ocidental Western Amazon Amazonia Occidental
ISSN:	0103-5053 (impresso) / 1678-4790 (online)
DOI:	10.21577/0103-5053.20180191
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CPAF-AC)