| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
15/12/2016 |
|
Data da última atualização: |
15/12/2016 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
BAYERA, C.; GOMES, J.; ZANATTA, J. A.; VIEIRA, F. C. B.; DIECKOW, J. |
|
Afiliação: |
Cimélio Bayera, Universidade Federal do Rio Grande do Sul; Juliana Gomes, Pós-graduanda da Universidade Federal do Rio Grande do Sul; JOSILEIA ACORDI ZANATTA, CNPF; Frederico Costa Beber Vieira, Universidade Federal do Pampa; Jeferson Dieckow, Universidade Federal do Paraná. |
|
Título: |
Mitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Soil & Tillage Research, v. 161, p. 86-94, Aug. 2016. |
|
DOI: |
http://dx.doi.org/10.1016/j.still.2016.03.011 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Greenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions. MenosGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-... Mostrar Tudo |
|
Palavras-Chave: |
Gás de efeito estufa; Óxido nitroso; Sequestro de carbono. |
|
Thesaurus Nal: |
Carbon sequestration; Greenhouse gas emissions; Long term experiments; Nitrous oxide. |
|
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
|
Marc: |
LEADER 02509naa a2200265 a 4500
001 2058698
005 2016-12-15
008 2016 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.still.2016.03.011$2DOI
100 1 $aBAYERA, C.
245 $aMitigating greenhouse gas emissions from a subtropical Ultisol by using long-term no-tillage in combination with legume cover crops.$h[electronic resource]
260 $c2016
520 $aGreenhouse gas (GHG) emissions can be partially mitigated with conservation agriculture. In this study, we assessed the effects of conventional tillage (CT) and no-tillage (NT), as well as five NT cover crop-based cropping systems, on yield-scaled GHG emissions in two long-term experiments (18 and 19 years) on a subtropical Paleudult. Air samples collected in static closed chambers were used to measure nitrous oxide (N2O) and methane (CH4) fluxes. The annual rate of change in soil organic C from the beginning of the experiments was used as proxy for net CO2 flux. Cumulative annual emissions of the three GHG and the CO2 costs of agricultural inputs and operations were taken in full account when estimating the global warming potential (GWP). Under legume cover crops, NT soil exhibited increased N2O emissions relative to CT soil (531 vs 217 kg CO2eq ha1 yr1); however, emissions of this gas from NT soil were fully offset by CO2 retention in soil organic matter (2063 to 3940 kg CO2 ha1 yr1). Soil CH4 fluxes were very low with all management systems (1.5 to 30.5 kg CO2eq ha1 yr1). NT soil under legume cover crops behaved as a net sink for GHG (GWP ranged from 971 to 2818 kg CO2eq ha1 yr1); by contrast, CT soil and NT soil with a low biomass input were net sources of GHG (GWP ranged from 857 to 2133 kg CO2eq ha1 yr1). The legume cover crops increased maize yield and further reduced yield-scaled GHG emissions. This result suggests that conservation management practices involving no-till in combination with legume cover crops provide an effective approach to sustainable low-C footprint food production in subtropical regions.
650 $aCarbon sequestration
650 $aGreenhouse gas emissions
650 $aLong term experiments
650 $aNitrous oxide
653 $aGás de efeito estufa
653 $aÓxido nitroso
653 $aSequestro de carbono
700 1 $aGOMES, J.
700 1 $aZANATTA, J. A.
700 1 $aVIEIRA, F. C. B.
700 1 $aDIECKOW, J.
773 $tSoil & Tillage Research$gv. 161, p. 86-94, Aug. 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Leite. |
|
Data corrente: |
31/10/2005 |
|
Data da última atualização: |
30/08/2012 |
|
Autoria: |
MARTINS, C. E.; CÓSER, A. C.; DERESZ, F. |
|
Afiliação: |
Embrapa Gado de Leite. |
|
Título: |
Formação e utilização de pastagem manejada em sistemas intensivos de produção de leite. |
|
Ano de publicação: |
2004 |
|
Fonte/Imprenta: |
Juiz de Fora: Embrapa Gado de Leite, 2004. |
|
Páginas: |
10 p. |
|
Série: |
(Embrapa Gado de Leite. Circular Técnica, 79). |
|
Idioma: |
Português |
|
Conteúdo: |
Escolha da área adaptada ao cultivo de forrageiras; Amostragem do solo, preparo, espaçamento e método de plantio; Amostragem do solo; Preparo do solo; Espaçamento e método de plantio; Calagem e adubação de plantio; Calagem; Adubação de plantio; Adubação de manutenção Resultados de pesquisa obtidos na Embrapa Gado de Leite com capim-elefante. |
|
Palavras-Chave: |
Amostragem e preparo; Calagem e adubação; Pastagens; Pastagens - manejo; plantio - calagem e adubação; produção de leite; solo - amostragem e preparo. |
|
Thesagro: |
Capim Elefante; Manejo; Plantio; Solo. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/65261/1/CT-79-Form-pastagem-sist-prod-leite.pdf
|
|
Marc: |
LEADER 01200nam a2200289 a 4500
001 1594952
005 2012-08-30
008 2004 bl uuuu u0uu1 u #d
100 1 $aMARTINS, C. E.
245 $aFormação e utilização de pastagem manejada em sistemas intensivos de produção de leite.
260 $aJuiz de Fora: Embrapa Gado de Leite$c2004
300 $a10 p.
490 $a(Embrapa Gado de Leite. Circular Técnica, 79).
520 $aEscolha da área adaptada ao cultivo de forrageiras; Amostragem do solo, preparo, espaçamento e método de plantio; Amostragem do solo; Preparo do solo; Espaçamento e método de plantio; Calagem e adubação de plantio; Calagem; Adubação de plantio; Adubação de manutenção Resultados de pesquisa obtidos na Embrapa Gado de Leite com capim-elefante.
650 $aCapim Elefante
650 $aManejo
650 $aPlantio
650 $aSolo
653 $aAmostragem e preparo
653 $aCalagem e adubação
653 $aPastagens
653 $aPastagens - manejo
653 $aplantio - calagem e adubação
653 $aprodução de leite
653 $asolo - amostragem e preparo
700 1 $aCÓSER, A. C.
700 1 $aDERESZ, F.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Leite (CNPGL) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
