| |
|
|
 | 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: |
19/11/2018 |
|
Data da última atualização: |
19/11/2018 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SIMON, P. L.; DIECKOW, J.; KLEIN, C. A. M. de; ZANATTA, J. A.; WEERDEN, T. J. van der; RAMALHO, B.; BAYER, C. |
|
Afiliação: |
Priscila Luzia Simon, UFPR; Jeferson Dieckow, UFPR; Cecile A. M. de Klein, AgResearch Invermay; JOSILEIA ACORDI ZANATTA, CNPF; Tony J. van der Weerden, AgResearch Invermay; Bruna Ramalho, UFPR; Cimelio Bayer, UFRGS. |
|
Título: |
Nitrous oxide emission factors from cattle urine and dung, and dicyandiamide (DCD) as a mitigation strategy in subtropical pastures. |
|
Ano de publicação: |
2018 |
|
Fonte/Imprenta: |
Agriculture, Ecosystems and Environment, v. 267, p. 74-82, Nov. 2018. |
|
DOI: |
10.1016/j.agee.2018.08.013 |
|
Idioma: |
Inglês |
|
Conteúdo: |
The Brazilian cattle herd (> 200 million) contributes, via excreta, 41% of the national emission of nitrous oxide (N2O), but little country-specific information exists on related emission factors and mitigation options. The aims of this study were: (i) to determine the N2O emission factors (EF) for dairy cattle urine and dung in a subtropical pasture and compare them with the 2% EF adopted by the IPCC; (ii) to evaluate the efficacy of the nitrification inhibitor dicyandiamide (DCD) to reduce those N2O emissions; and (iii) to determine if the best mode of DCD application is dissolved into or sprayed on urine and dung. An experiment was conducted in a kikuyu grass (Pennisetum clandestinum) pasture over a haplic Cambisol, in southern Brazil. Fresh urine and dung from Friesian dairy cows were applied with or without application of DCD; DCD was dissolved into the excreta before its application onto the soil, or was sprayed on the excreta patch. Treatments were applied four times, once per each season of 2014 (in different spots, same area). After excreta application, N2O fluxes were monitored in 10 air sampling sessions over 63?68 days, by using closed static chambers. Urine and dung were important sources of N2O, with an average EF of 0.34% for urine and 0.11% for dung; this urges the investigation of related mitigation strategies for Brazilian cattle systems. Yet, those emission factors were not as high as the IPCC default value of 2%, which suggests that this default value may need to be revised for the subtropical region. Additionally, this revision should consider the disaggregation of the EF for urine and dung. As a mitigation strategy, the use of DCD had a potential to curb N2O emission from urine patches, particularly in the cooler seasons of autumn and winter, when it reduced emissions by 60?82% after being dissolved in urine. DCD sprayed on excreta patches significantly reduced emissions in autumn only (by 47%) and thus was less efficient than when dissolved in urine. With respect to dung, there was no clear evidence that N2O emission from that excreta is mitigated by DCD, either dissolved into the dung mass or sprayed over the dung pat. MenosThe Brazilian cattle herd (> 200 million) contributes, via excreta, 41% of the national emission of nitrous oxide (N2O), but little country-specific information exists on related emission factors and mitigation options. The aims of this study were: (i) to determine the N2O emission factors (EF) for dairy cattle urine and dung in a subtropical pasture and compare them with the 2% EF adopted by the IPCC; (ii) to evaluate the efficacy of the nitrification inhibitor dicyandiamide (DCD) to reduce those N2O emissions; and (iii) to determine if the best mode of DCD application is dissolved into or sprayed on urine and dung. An experiment was conducted in a kikuyu grass (Pennisetum clandestinum) pasture over a haplic Cambisol, in southern Brazil. Fresh urine and dung from Friesian dairy cows were applied with or without application of DCD; DCD was dissolved into the excreta before its application onto the soil, or was sprayed on the excreta patch. Treatments were applied four times, once per each season of 2014 (in different spots, same area). After excreta application, N2O fluxes were monitored in 10 air sampling sessions over 63?68 days, by using closed static chambers. Urine and dung were important sources of N2O, with an average EF of 0.34% for urine and 0.11% for dung; this urges the investigation of related mitigation strategies for Brazilian cattle systems. Yet, those emission factors were not as high as the IPCC default value of 2%, which suggests that this default value may... Mostrar Tudo |
|
Palavras-Chave: |
Ammonium; Application mode; Friesian cows; Inibidor de nitrificação; Nitrate; Nitrification inhibitor; WFPS. |
|
Thesagro: |
Amônia; Gado Holandês; Nitrato. |
|
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
|
Marc: |
LEADER 03159naa a2200325 a 4500
001 2099548
005 2018-11-19
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1016/j.agee.2018.08.013$2DOI
100 1 $aSIMON, P. L.
245 $aNitrous oxide emission factors from cattle urine and dung, and dicyandiamide (DCD) as a mitigation strategy in subtropical pastures.$h[electronic resource]
260 $c2018
520 $aThe Brazilian cattle herd (> 200 million) contributes, via excreta, 41% of the national emission of nitrous oxide (N2O), but little country-specific information exists on related emission factors and mitigation options. The aims of this study were: (i) to determine the N2O emission factors (EF) for dairy cattle urine and dung in a subtropical pasture and compare them with the 2% EF adopted by the IPCC; (ii) to evaluate the efficacy of the nitrification inhibitor dicyandiamide (DCD) to reduce those N2O emissions; and (iii) to determine if the best mode of DCD application is dissolved into or sprayed on urine and dung. An experiment was conducted in a kikuyu grass (Pennisetum clandestinum) pasture over a haplic Cambisol, in southern Brazil. Fresh urine and dung from Friesian dairy cows were applied with or without application of DCD; DCD was dissolved into the excreta before its application onto the soil, or was sprayed on the excreta patch. Treatments were applied four times, once per each season of 2014 (in different spots, same area). After excreta application, N2O fluxes were monitored in 10 air sampling sessions over 63?68 days, by using closed static chambers. Urine and dung were important sources of N2O, with an average EF of 0.34% for urine and 0.11% for dung; this urges the investigation of related mitigation strategies for Brazilian cattle systems. Yet, those emission factors were not as high as the IPCC default value of 2%, which suggests that this default value may need to be revised for the subtropical region. Additionally, this revision should consider the disaggregation of the EF for urine and dung. As a mitigation strategy, the use of DCD had a potential to curb N2O emission from urine patches, particularly in the cooler seasons of autumn and winter, when it reduced emissions by 60?82% after being dissolved in urine. DCD sprayed on excreta patches significantly reduced emissions in autumn only (by 47%) and thus was less efficient than when dissolved in urine. With respect to dung, there was no clear evidence that N2O emission from that excreta is mitigated by DCD, either dissolved into the dung mass or sprayed over the dung pat.
650 $aAmônia
650 $aGado Holandês
650 $aNitrato
653 $aAmmonium
653 $aApplication mode
653 $aFriesian cows
653 $aInibidor de nitrificação
653 $aNitrate
653 $aNitrification inhibitor
653 $aWFPS
700 1 $aDIECKOW, J.
700 1 $aKLEIN, C. A. M. de
700 1 $aZANATTA, J. A.
700 1 $aWEERDEN, T. J. van der
700 1 $aRAMALHO, B.
700 1 $aBAYER, C.
773 $tAgriculture, Ecosystems and Environment$gv. 267, p. 74-82, Nov. 2018.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Acesso ao texto completo restrito à biblioteca da Embrapa Unidades Centrais. Para informações adicionais entre em contato com biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
19/06/2000 |
|
Data da última atualização: |
12/04/2004 |
|
Autoria: |
CAMPANHOLA, C.; SILVA, J. G. da. |
|
Título: |
Desenvolvimento local e a democratizacao dos espacos rurais. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
Cadernos de Ciencia & Tecnologia, Brasilia, v.17, n.1, p.11-40, jan./mar.2000. |
|
Idioma: |
Português |
|
Conteúdo: |
Os criterios para a separacao dos espacos urbano e rural tem sido questionados em razao da crescente ocorrencia no meio rural de atividades tipicamente urbanas, principalmente aquelas dos setores industriais e de servicos. Como resultado, esse corte perde relevancia analitica e vem ganhando expressao, o enfoque no territorio, ou local para a formulacao de politicas. O local nao tem apenas uma conotacao fisica, mas representa um conjunto de relacoes economicas, sociais e culturais que lhe conferem caracteristicas individuais que diferenciam um local do outro. Nesse trabalho o local, como foco das estrategias e acoes de desenvolvimento. Entre as forcas estimuladoras desse processo, destaca-se a globalizacao, que privilegia a maior integracao socioeconomica entre regioes, a descentralizacao da administracao publica, as novas formas e mecanismos de getao dos recursos naturais e a organizacao dos atores sociais, que garante a democratizacao das acoes de desenvolvimento local. Por fim, sao apresentadas propostas com o objetivo de incorporar as caracteristicas e tendencias discutidas nas iniciativas de desenvolvimento rural. |
|
Palavras-Chave: |
Decentralization; Descentralziacao; Dlobalizacao; Natural resource. |
|
Thesagro: |
Desenvolvimento Rural; Recurso Natural. |
|
Thesaurus NAL: |
globalization; rural development. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01792naa a2200229 a 4500
001 1101749
005 2004-04-12
008 2000 bl uuuu u00u1 u #d
100 1 $aCAMPANHOLA, C.
245 $aDesenvolvimento local e a democratizacao dos espacos rurais.
260 $c2000
520 $aOs criterios para a separacao dos espacos urbano e rural tem sido questionados em razao da crescente ocorrencia no meio rural de atividades tipicamente urbanas, principalmente aquelas dos setores industriais e de servicos. Como resultado, esse corte perde relevancia analitica e vem ganhando expressao, o enfoque no territorio, ou local para a formulacao de politicas. O local nao tem apenas uma conotacao fisica, mas representa um conjunto de relacoes economicas, sociais e culturais que lhe conferem caracteristicas individuais que diferenciam um local do outro. Nesse trabalho o local, como foco das estrategias e acoes de desenvolvimento. Entre as forcas estimuladoras desse processo, destaca-se a globalizacao, que privilegia a maior integracao socioeconomica entre regioes, a descentralizacao da administracao publica, as novas formas e mecanismos de getao dos recursos naturais e a organizacao dos atores sociais, que garante a democratizacao das acoes de desenvolvimento local. Por fim, sao apresentadas propostas com o objetivo de incorporar as caracteristicas e tendencias discutidas nas iniciativas de desenvolvimento rural.
650 $aglobalization
650 $arural development
650 $aDesenvolvimento Rural
650 $aRecurso Natural
653 $aDecentralization
653 $aDescentralziacao
653 $aDlobalizacao
653 $aNatural resource
700 1 $aSILVA, J. G. da
773 $tCadernos de Ciencia & Tecnologia, Brasilia$gv.17, n.1, p.11-40, jan./mar.2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
