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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
19/03/2020 |
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Data da última atualização: |
26/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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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. |
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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. |
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Título: |
CH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Scientia Agricola, Piracicaba, v. 78, n. 1, e20180355, 2021. |
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ISSN: |
1678-992X |
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DOI: |
https://doi.org/10.1590/1678-992x-2018-0355 |
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Idioma: |
Inglês |
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Notas: |
Epub Mar 13, 2020 |
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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 μg CH4 m?2 h?1 and the mean N2O fluxes 5.45, 4.85 and 3.85 μg 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 ≤ 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. |
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Palavras-Chave: |
Óxido nitroso. |
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Thesagro: |
Cerrado; Efeito Estufa; Eucalipto; Metano; Solo Florestal. |
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Thesaurus Nal: |
Greenhouse gas emissions; Nitrous oxide. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/211935/1/1678-992X-sa-78-01-e20180355.pdf
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Marc: |
LEADER 02481naa a2200361 a 4500
001 2121308
005 2022-04-26
008 2021 bl uuuu u00u1 u #d
022 $a1678-992X
024 7 $ahttps://doi.org/10.1590/1678-992x-2018-0355$2DOI
100 1 $aOLIVEIRA, A. D. de
245 $aCH4 and N2O fluxes from planted forests and native Cerrado ecosystems in Brazil.$h[electronic resource]
260 $c2021
500 $aEpub Mar 13, 2020
520 $aABSTRACT: 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 μg CH4 m?2 h?1 and the mean N2O fluxes 5.45, 4.85 and 3.85 μg 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 ≤ 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.
650 $aGreenhouse gas emissions
650 $aNitrous oxide
650 $aCerrado
650 $aEfeito Estufa
650 $aEucalipto
650 $aMetano
650 $aSolo Florestal
653 $aÓxido nitroso
700 1 $aRIBEIRO, F. P.
700 1 $aFERREIRA, E. A. B.
700 1 $aMALAQUIAS, J. V.
700 1 $aGATTO, A.
700 1 $aZUIM, D. R.
700 1 $aPINHEIRO, L. de A.
700 1 $aPULROLNIK, K.
700 1 $aSOARES, J. P. G.
700 1 $aCARVALHO, A. M. de
773 $tScientia Agricola, Piracicaba$gv. 78, n. 1, e20180355, 2021.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca |
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Origem |
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Classificação |
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Registro |
Volume |
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URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
07/12/2012 |
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Data da última atualização: |
01/04/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
CARVALHO, T. C. de; KRZYZANOWSKI, F. C.; OHLSON, O. de C.; PANOBIANCO, M. |
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Afiliação: |
UFPR; FRANCISCO CARLOS KRZYZANOWSKI, CNPSO; OSVALDO DE CASTRO OHLSON, CLASPAR; MARISTELA PANOBIANCO, UFPR. |
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Título: |
Improved assessment of wheat seeds vigor. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Ciência e Agrotecnologia, Lavras, v. 36, n. 6, p. 608-614, nov./dez. 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
The tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into a 1.0% tetrazolium solution, at 30º C, for 3 h; and 3) longitudinal bisection, with subsequent immersion of one seed half into a 0.075% tetrazolium solution, at 40º C, for 2 h. It was concluded that the tetrazolium test is more efficient in evaluating wheat seed vigor when performed with immersion of one half of the seed into a 0.075% tetrazolium solution (40º C, for 2 h) or a 0.1% tetrazolium solution (30º C, during 3 h); allowing to sort seeds into four quality classes. |
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Thesagro: |
Qualidade; Semente; Trigo. |
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Thesaurus NAL: |
Seed quality; Wheat. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/80178/1/improved.krzyzanowski.2012.pdf
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Marc: |
LEADER 01838naa a2200217 a 4500
001 1941746
005 2013-04-01
008 2012 bl uuuu u00u1 u #d
100 1 $aCARVALHO, T. C. de
245 $aImproved assessment of wheat seeds vigor.$h[electronic resource]
260 $c2012
520 $aThe tetrazolium test is widely used for seed vigor assessment of various plant species. For wheat, however, there is no methodology specifically recommended. This study aimed at determining an efficient procedure to evaluate vigor of wheat seeds by this test; besides allowing the establishment of seed quality classes. Thus, four different wheat seed lots were assessed by determining the moisture content and through tests of germination, accelerated aging, and field seedling emergence. The following methodologies were assessed: 1) longitudinal bisection of seed, with subsequent placement of the two halves on filter paper moistened with a 1.0% tetrazolium solution, at 30º C, for 2 h; 2) longitudinal bisection, with subsequent immersion of one seed half into a 1.0% tetrazolium solution, at 30º C, for 3 h; and 3) longitudinal bisection, with subsequent immersion of one seed half into a 0.075% tetrazolium solution, at 40º C, for 2 h. It was concluded that the tetrazolium test is more efficient in evaluating wheat seed vigor when performed with immersion of one half of the seed into a 0.075% tetrazolium solution (40º C, for 2 h) or a 0.1% tetrazolium solution (30º C, during 3 h); allowing to sort seeds into four quality classes.
650 $aSeed quality
650 $aWheat
650 $aQualidade
650 $aSemente
650 $aTrigo
700 1 $aKRZYZANOWSKI, F. C.
700 1 $aOHLSON, O. de C.
700 1 $aPANOBIANCO, M.
773 $tCiência e Agrotecnologia, Lavras$gv. 36, n. 6, p. 608-614, nov./dez. 2012.
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Embrapa Soja (CNPSO) |
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