Data/hora: 02/06/2024 07:26:17

Biblioteca(s): | Embrapa Acre.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 17/02/2023
Data da última atualização: | 17/05/2023
Autoria: | LEAL, O. dos A.; JIMÉNEZ-MORILLO, N. T.; GONZÁLEZ-PÉREZ, J. A.; KNICKER, H.; COSTA, F. de S.; JIMÉNEZ-MORILLO, P. N.; CARVALHO JUNIOR, J. A. de; SANTOS, J. C. dos; DICK, D. P.
Afiliação: | OTÁVIO DOS ANJOS LEAL, INSTITUTE OF BIO AND GESOCIENCE AGROSPHERE; NICASIO T. JIMÉNEZ-MORILLO, UNIVERSIDADE DE ÉVORA /I NSTITUTO DE RECURSOS NATURALES Y AGROBIOLOGÍA DE SEVILLA; JOSÉ A. GONZÁLEZ-PÉREZ, INSTITUTO DE RECURSOS NATURALES Y AGROBIOLOGÍA DE SEVILLA; HEIKE KNICKER, INSTITUTO DE RECURSOS NATURALES Y AGROBIOLOGÍA DE SEVILLA; FALBERNI DE SOUZA COSTA, CPAF-AC; PEDRO N. JIMÉNEZ-MORILLO, UNIVERSIDAD PABLO DE OLAVIDE; JOÃO ANDRADE DE CARVALHO JÚNIOR, UNIVERSIDADE ESTADUAL PAULISTA; JOSÉ CARLOS DOS SANTOS, INSTITUTO NACIONAL DE PESQUISAS ESPACIAIS; DEBORAH PINHEIRO DICK, UNIVESIDADE FEDERAL DO RIO GRANDE DO SUL.
Título: | Soil organic matter molecular composition shifts driven by forest regrowth or pasture after slash-and-burn of Amazon Forest.
Ano de publicação: | 2023
Fonte/Imprenta: | International Journal of Environmental Research and Public Health, v. 20, n. 4, 3485, Feb. 2023.
ISSN: | 1661-7827 (impresso) / 1660-4601 (online)
DOI: | https://doi.org/10.3390/ijerph20043485
Idioma: | Inglês
Conteúdo: | Slash-and-burn of Amazon Forest (AF) for pasture establishment has increased the occurrence of AF wildfires. Recent studies emphasize soil organic matter (SOM) molecular composition as a principal driver of post-fire forest regrowth and restoration of AF anti-wildfire ambience. Nevertheless, SOM chemical shifts caused by AF fires and post-fire vegetation are rarely investigated at a molecular level. We employed pyrolysis-gas chromatography-mass spectrometry to reveal molecular changes in SOM (0?10, 40?50 cm depth) of a slash-burn-and-20-month-regrowth AF (BAF) and a 23-year Brachiaria pasture post-AF fire (BRA) site compared to native AF (NAF). In BAF (0-10 cm), increased abundance of unspecific aromatic compounds (UACs), polycyclic aromatic hydrocarbons (PAHs) and lipids (Lip) coupled with a depletion of polysaccharides (Pol) revealed strong lingering effects of fire on SOM. This occurs despite fresh litter deposition on soil, suggesting SOM minimal recovery and toxicity to microorganisms. Accumulation of recalcitrant compounds and slow decomposition of fresh forest material may explain the higher carbon content in BAF (0?5 cm). In BRA, SOM was dominated by Brachiaria contributions. At 40?50 cm, alkyl and hydroaromatic compounds accumulated in BRA, whereas UACs accumulated in BAF. UACs and PAH compounds were abundant in NAF, possibly air-transported from BAF.
Palavras-Chave: | Acre; Acrisoles; Amazonia Occidental; Amazônia Ocidental; Analytical pyrolysis; Asentamiento humano; Assentamento Santa Luzia (AC); Composição molecular; Composición molecular; Cruzeiro do Sul (AC); Derruba-e-queima; Materia orgánica del suelo; Molecular composition; Nitroalcanos; Nitroalkanes; Pastizales; Química del suelo; Regeneración natural; Slash-and-burn agriculture; Van Krevelen 3D diagram; Western Amazon.
Thesagro: | Brachiaria; Cultivo Migratório; Matéria Orgânica; Pastagem; Química do Solo; Regeneração Natural; Sistema de Cultivo; Solo.
Thesaurus Nal: | Acrisols; Human settlements; Natural regeneration; Pastures; Shifting cultivation; Soil chemistry; Soil organic matter.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1151856/1/27424.pdf
Registro original: | Embrapa Acre (CPAF-AC)
Exemplares: | CPAF-AC - (27424-1) - UPC - AP - DD -  -  -  - DIS