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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.
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Embrapa Florestas (CNPF) |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
29/11/2018 |
Data da última atualização: |
23/06/2022 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SILVA, A. C. da; OLIVEIRA, A. L. de; COGITSKEI, M. M.; SOUZA, L. M. de; FONTES, E. M. G.; PIRES, C. S. S.; SUJII, E. R.; TOGNI, P. H. B. |
Afiliação: |
ANA CLAUDIA DA SILVA, CENTRO UNIVERSITÁRIO DO DISTRITO FEDERAL; ANDRESSA L. DE OLIVEIRA, UNIVERSIDADE PAULISTA; MICHELLE M. COGITSKEI, UNIVERSIDADE PAULISTA; LUCAS MACHADO DE SOUZA, Cenargen; ELIANA MARIA GOUVEIA FONTES, Cenargen; CARMEN SILVIA SOARES PIRES, Cenargen; EDISON RYOITI SUJII, Cenargen; PEDRO HENRIQUE B. TOGNI, UNB. |
Título: |
Consórcio couve e coentro favorece a coexistência de predadores generalistas. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 27.; CONGRESSO LATINO-AMERICANO DE ENTOMOLOGIA, 10., Gramado. Saúde, ambiente e agricultura: anais. Gramado: SEB, 2018. |
Páginas: |
p. 466 |
Idioma: |
Português |
Notas: |
Na publicação: Lucas M. Souza. |
Palavras-Chave: |
Consórcio de culturas; Predação intraguilda. |
Thesagro: |
Controle Biológico. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/187282/1/Consorcio.pdf
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Marc: |
LEADER 00862nam a2200241 a 4500 001 2100316 005 2022-06-23 008 2018 bl uuuu u00u1 u #d 100 1 $aSILVA, A. C. da 245 $aConsórcio couve e coentro favorece a coexistência de predadores generalistas.$h[electronic resource] 260 $aIn: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 27.; CONGRESSO LATINO-AMERICANO DE ENTOMOLOGIA, 10., Gramado. Saúde, ambiente e agricultura: anais. Gramado: SEB$c2018 300 $ap. 466 500 $aNa publicação: Lucas M. Souza. 650 $aControle Biológico 653 $aConsórcio de culturas 653 $aPredação intraguilda 700 1 $aOLIVEIRA, A. L. de 700 1 $aCOGITSKEI, M. M. 700 1 $aSOUZA, L. M. de 700 1 $aFONTES, E. M. G. 700 1 $aPIRES, C. S. S. 700 1 $aSUJII, E. R. 700 1 $aTOGNI, P. H. B.
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