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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
07/12/2015 |
Data da última atualização: |
12/02/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
BAYER, C.; GOMES, J.; ZANATTA, J. A.; VIEIRA, F. C. B.; PICCOLO, M. de C.; DIECKOW, J.; SIX, J. |
Afiliação: |
CIMÉLIO BAYER, Universidade Federal do Rio Grande do Sul; JULIANA GOMES, Universidade Federal do Rio Grande do Sul; JOSILEIA ACORDI ZANATTA, CNPF; FREDERICO COSTA BEBER VIEIRA, Universidade Federal do Rio Grande do Sul; MARISA DE CÁSSIA PICCOLO, Universidade de São Paulo; JEFERSON DIECKOW, Universidade Federal do Paraná; JOHAN SIX, University of California. |
Título: |
Soil nitrous oxide emissions as affected by long-term tillage, cropping systems and nitrogen fertilization in Southern Brazil. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
Soil & Tillage Research, Amsterdam, v. 146, p. 213-222, 2015. |
DOI: |
http://dx.doi.org/10.1016/j.still.2014.10.011 |
Idioma: |
Inglês |
Conteúdo: |
Soil nitrous oxide (N2O) emissions are affected by management practices, but little information is available on the interactive effects of tillage, cropping systems and N sources in tropical and subtropical soils. In an 18-yr old experiment located in a subtropical Acrisol of Southern Brazil we conducted a sequence of two trials. The 1-year trial (October 2003?2004) was set to evaluate the long-term effects of tillage [CT: conventional; and NT: no-tillage] and cropping systems [O/M: black oat (Avena strigosa Schreb.)/maize (Zea mays L.); and V/M: vetch (Vicia sativa L.)/maize] on soil N2O emissions, either in the post-management period (45 days after desiccation and knife-rolling of winter cover crops) or in the whole year. The second and short-term trial (October?November 2004) was carried out to compare the impact of N sources [urea (mineral) and legume-residue of vetch (biologically fixed), both at 180 kg N ha?1] on soil N2O emissions during 53 days after cover-crop management. Air sampling was carried out by static chambers and N2O analysis by gas chromatography. In the 45-day post-management period of the 1-year trial, soil N2O emissions were practically not affected by tillage systems, but increased 4 times due to vetch residues (average of 0.40 ± 0.08 kg N ha?1 in V/M versus 0.10 ± 0.05 kg N ha?1 in O/M) and related with soil contents of NO3?-N, NH4+-N, and dissolved organic C (DOC). Over the whole year, soil N2O emissions under CT were similar for grass- and legume-based cropping systems and averaged 0.43 ± 0.17 kg N ha?1, while NT exacerbated N2O emissions in the legume-based cropping system (0.80 ± 0.07 kg N ha?1 in V/M versus ?0.07 ± 0.06 kg N ha?1 in O/M). Maize yield was not affected by tillage, but increased from 2.32 Mg ha?1 in O/M to 4.44 Mg ha?1 in V/M. Yield-scaled N2O emissions varied from ?33 g N2O-N Mg?1 grain in NT O/M to 179 g N2O-N Mg?1 grain in NT V/M, and were intermediate in CT soil (106 and 156 g N2O-N Mg?1grain in V/M and O/M cropping systems, respectively). In the short-term trial, the N2O emitted in excess relative to the control treatment (O/M without N fertilizer) was at least 3 times greater with urea-N (0.44% of applied N) than with legume-residue-Nsource (0.13% of applied N). Yield-scaled N2O emission after vetch residues management (67 g N Mg?1 grain) was half of that after urea-N application (152 g N Mg?1 grain). Partially supplying the maize N requirements with winter legume cover-crops may be a feasible strategy to mitigate soil N2O emissions in the subtropical conservation agriculture. MenosSoil nitrous oxide (N2O) emissions are affected by management practices, but little information is available on the interactive effects of tillage, cropping systems and N sources in tropical and subtropical soils. In an 18-yr old experiment located in a subtropical Acrisol of Southern Brazil we conducted a sequence of two trials. The 1-year trial (October 2003?2004) was set to evaluate the long-term effects of tillage [CT: conventional; and NT: no-tillage] and cropping systems [O/M: black oat (Avena strigosa Schreb.)/maize (Zea mays L.); and V/M: vetch (Vicia sativa L.)/maize] on soil N2O emissions, either in the post-management period (45 days after desiccation and knife-rolling of winter cover crops) or in the whole year. The second and short-term trial (October?November 2004) was carried out to compare the impact of N sources [urea (mineral) and legume-residue of vetch (biologically fixed), both at 180 kg N ha?1] on soil N2O emissions during 53 days after cover-crop management. Air sampling was carried out by static chambers and N2O analysis by gas chromatography. In the 45-day post-management period of the 1-year trial, soil N2O emissions were practically not affected by tillage systems, but increased 4 times due to vetch residues (average of 0.40 ± 0.08 kg N ha?1 in V/M versus 0.10 ± 0.05 kg N ha?1 in O/M) and related with soil contents of NO3?-N, NH4+-N, and dissolved organic C (DOC). Over the whole year, soil N2O emissions under CT were similar for grass- and legume-b... Mostrar Tudo |
Palavras-Chave: |
Conservation agriculture; Cover-crops; N2O. |
Thesaurus Nal: |
no-tillage; urea. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03386naa a2200265 a 4500 001 2030866 005 2016-02-12 008 2015 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1016/j.still.2014.10.011$2DOI 100 1 $aBAYER, C. 245 $aSoil nitrous oxide emissions as affected by long-term tillage, cropping systems and nitrogen fertilization in Southern Brazil.$h[electronic resource] 260 $c2015 520 $aSoil nitrous oxide (N2O) emissions are affected by management practices, but little information is available on the interactive effects of tillage, cropping systems and N sources in tropical and subtropical soils. In an 18-yr old experiment located in a subtropical Acrisol of Southern Brazil we conducted a sequence of two trials. The 1-year trial (October 2003?2004) was set to evaluate the long-term effects of tillage [CT: conventional; and NT: no-tillage] and cropping systems [O/M: black oat (Avena strigosa Schreb.)/maize (Zea mays L.); and V/M: vetch (Vicia sativa L.)/maize] on soil N2O emissions, either in the post-management period (45 days after desiccation and knife-rolling of winter cover crops) or in the whole year. The second and short-term trial (October?November 2004) was carried out to compare the impact of N sources [urea (mineral) and legume-residue of vetch (biologically fixed), both at 180 kg N ha?1] on soil N2O emissions during 53 days after cover-crop management. Air sampling was carried out by static chambers and N2O analysis by gas chromatography. In the 45-day post-management period of the 1-year trial, soil N2O emissions were practically not affected by tillage systems, but increased 4 times due to vetch residues (average of 0.40 ± 0.08 kg N ha?1 in V/M versus 0.10 ± 0.05 kg N ha?1 in O/M) and related with soil contents of NO3?-N, NH4+-N, and dissolved organic C (DOC). Over the whole year, soil N2O emissions under CT were similar for grass- and legume-based cropping systems and averaged 0.43 ± 0.17 kg N ha?1, while NT exacerbated N2O emissions in the legume-based cropping system (0.80 ± 0.07 kg N ha?1 in V/M versus ?0.07 ± 0.06 kg N ha?1 in O/M). Maize yield was not affected by tillage, but increased from 2.32 Mg ha?1 in O/M to 4.44 Mg ha?1 in V/M. Yield-scaled N2O emissions varied from ?33 g N2O-N Mg?1 grain in NT O/M to 179 g N2O-N Mg?1 grain in NT V/M, and were intermediate in CT soil (106 and 156 g N2O-N Mg?1grain in V/M and O/M cropping systems, respectively). In the short-term trial, the N2O emitted in excess relative to the control treatment (O/M without N fertilizer) was at least 3 times greater with urea-N (0.44% of applied N) than with legume-residue-Nsource (0.13% of applied N). Yield-scaled N2O emission after vetch residues management (67 g N Mg?1 grain) was half of that after urea-N application (152 g N Mg?1 grain). Partially supplying the maize N requirements with winter legume cover-crops may be a feasible strategy to mitigate soil N2O emissions in the subtropical conservation agriculture. 650 $ano-tillage 650 $aurea 653 $aConservation agriculture 653 $aCover-crops 653 $aN2O 700 1 $aGOMES, J. 700 1 $aZANATTA, J. A. 700 1 $aVIEIRA, F. C. B. 700 1 $aPICCOLO, M. de C. 700 1 $aDIECKOW, J. 700 1 $aSIX, J. 773 $tSoil & Tillage Research, Amsterdam$gv. 146, p. 213-222, 2015.
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2. | | DIECKOW, J.; ZANATTA, J. A.; BAYER, C. Contribuição do óxido nitroso, do metano e do carbono da matéria orgânica do solo na emissão ou mitigação de gases de efeito estufa totais do solo em plantio direto. In: BETTIOL, W.; SILVA, C. A.; CERRI, C. E. P.; MARTIN NETO, L.; ANDRADE, C. A. de (ed.). Entendendo a matéria orgânica do solo em ambientes tropical e subtropical. Brasília, DF: Embrapa, 2023. p. 627-644.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Florestas. |
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Biblioteca(s): Embrapa Florestas. |
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12. | | BAYER, C.; MARTIN-NETO, L.; MIELNICZUK, J.; PAVINATO, A.; DIECKOW, J. Carbon sequestration in two brazilian cerrado soils under no-till. Soil & Tillage Research, Amsterdam, v. 86, n. 2, p. 237-245, 2006.Biblioteca(s): Embrapa Instrumentação. |
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14. | | BALBINOT JUNIOR, A. A.; MORAES, A. de; PELISSARI, A.; VEIGA, M. da; DIECKOW, J. Estratégias de uso do solo no inverno e seu efeito no milho cultivado em sucessão. Revista Brasileira de Agrociência, Pelotas, v. 17, n. 1/4, p. 94-107, jan-mar, 2011.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 3 |
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18. | | CONCEIÇÃO, P. C.; BOENI, M.; DIECKOW, J.; MARTIN-NETO, L.; BAYER, C.; MIELNICZUK, J.; ANZANELLO, R. Estudo da proteção física da matéria orgânica do solo pelo fracionamento densimétrico com iodeto e politungstato de sódio. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 6., 2005, Rio de Janeiro. Resumos expandidos... Rio de Janeiro: EMBRAPA Solos, 2005. p. 112-115.Biblioteca(s): Embrapa Instrumentação. |
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