Data/hora: 23/06/2024 07:01:14

Biblioteca(s): | Embrapa Unidades Centrais.
Data corrente: | 19/03/2020
Data da última atualização: | 20/04/2020
Autoria: | OLIVEIRA, A. D. de; RIBEIRO, F. P.; FERREIRA, E. A. B.; MALAQUIAS, J. V.; GATTO, A.; ZUIM, D. R.; PINHEIRO, L. de A.; PULROLNIK, K.; SOARES, J. P. G.; CARVALHO, A. M. de.
Afiliação: | ALEXSANDRA DUARTE DE OLIVEIRA, CPAC; FABIANA PIONTEKOWSKI RIBEIRO, UNB; ELOISA APARECIDA BELLEZA FERREIRA, Cenargen; JUACI VITORIA MALAQUIAS, CPAC; ALCIDES GATTO, UNB; DIANA REGAZZI ZUIM, CPAC; LUCIANO DE ALMEIDA PINHEIRO, SGE; KARINA PULROLNIK, CPAC; JOAO PAULO GUIMARAES SOARES, CPAC; ARMINDA MOREIRA DE CARVALHO, CPAC.
Título: | CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil.
Ano de publicação: | 2020
Fonte/Imprenta: | Scientia Agricola, Piracicaba, v. 78, n. 1, e20180355, 2020.
DOI: | https://doi.org/10.1590/1678-992x-2018-0355
Idioma: | Inglês
Notas: | Epub Mar 13, 2020
Conteúdo: | ABSTRACT: Forest soils are N2O sources and commonly act as CH4 sinks. This study evaluated the dynamics of the CH4 and N2O fluxes of soils under Eucalyptus plantations and native Cerrado vegetation, as well as possible interactions between environmental factors and fluxes. The study was carried out in the Distrito Federal, Brazil, during 26 months, in three areas: in two stands of the hybrid Eucalyptus urophylla × Eucalyptus grandis, planted in 2011 (E1), and in 2009 (E2) and native Cerrado vegetation (CE). Measurements to determine the fluxes in a closed static chamber were carried out from Oct 2013 to Nov 2015. Soil and climate factors were monitored. During the study period, the mean CH4 fluxes were ?22.48, ?8.38 and ?1.31 &#956;g CH4 m?2 h?1 and the mean N2O fluxes 5.45, 4.85 and 3.85 &#956;g N2O m?2 h?1 from E1, E2 and CE, respectively. Seasonality affected plantations in the studied sites. Cumulative CH4 influxes were calculated (year-1: ?1.86 to -0.63 kg ha?1 yr?1; year-2: ?1.85 to ?1.34 kg ha?1 yr?1). Cumulative N2O fluxes in the three sites were &#8804; 0.85 kg ha?1 yr?1. The change in land use from Cerrado to Eucalyptus plantations did not significantly changed regarding greenhouse gases (GHG), compared to the native vegetation. Flux rates of both gases (N2O and CH4) were low. Temporal variations in GHG fluxes and different ages of the stands did not cause significant differences in cumulative annual fluxes.
Palavras-Chave: | Óxido nitroso.
Thesagro: | Cerrado; Efeito Estufa; Eucalipto; Metano; Solo Florestal.
Thesaurus Nal: | Greenhouse gas emissions; Nitrous oxide.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Unidades Centrais (AI-SEDE)
Exemplares: | AI-SEDE - (64528-1) - UPC - AP - DD -  -  -  - DIS