Data/hora: 20/06/2024 16:08:29

Biblioteca(s): | Embrapa Acre.
Data corrente: | 27/09/2018
Data da última atualização: | 02/07/2021
Autoria: | LEAL, O. A.; DICK, D. P.; COSTA, F. de S.; KNICKER, H.; CARVALHO JÚNIOR, J. A. de; SANTOS, J. C.
Afiliação: | 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).
Título: | Carbon in physical fractions and organic matter chemical composition of an acrisol after amazon forest burning and conversion into pasture.
Ano de publicação: | 2019
Fonte/Imprenta: | Journal of the Brazilian Chemical Society, v. 30, n. 2, p. 413-424, 2019.
ISSN: | 0103-5053 (impresso) / 1678-4790 (online)
DOI: | 10.21577/0103-5053.20180191
Idioma: | Inglês
Conteúdo: | 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.
Palavras-Chave: | Acre; Acrisoles; Amazonia Occidental; Amazônia Ocidental; Bosque tropical húmedo; Cruzeiro do Sul (AC); Fazenda Santa Luzia; Materia orgánica del suelo; Regeneración natural; Reservorios de carbono; Suelos quemados; Western Amazon.
Thesagro: | Argissolos; Carbono; Estoque; Floresta Tropical; Fogo; Impacto Ambiental; Matéria Orgânica; Regeneração Natural; Saturação.
Thesaurus Nal: | Acrisols; Burnt soils; Carbon sinks; Environmental impact; Natural regeneration; Soil organic matter; Tropical rain forests.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/189618/1/26688.pdf
Registro original: | Embrapa Acre (CPAF-AC)
Exemplares: | CPAF-AC - (26688-1) - UPC - AP - DD -  -  -  - DIS