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Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
28/09/2022 |
Data da última atualização: |
28/09/2022 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
ALVAREZ, C.; ÁLVAREZ, C. R.; COSTANTINI, A. O.; ALVES, B. J. R. |
Afiliação: |
INTA; Universidad de Buenos Aires; ALEJANDRO O. COSTANTINI, INTA; BRUNO JOSE RODRIGUES ALVES, CNPAB. |
Título: |
Soil nitrous oxide emissions in a maize (Zea mays L.) crop in response to nitrogen fertilisation. |
Ano de publicação: |
2022 |
Fonte/Imprenta: |
Soil Research, Published online: 13 June 2022. |
ISSN: |
1838-675X |
DOI: |
https://doi.org/10.1071/SR21094 |
Idioma: |
Inglês |
Conteúdo: |
Context: An appropriate use of the fertiliser technology may lead to a more efficient N absorption and to the reduction of economic and environmental costs. Aims: This study sought to quantify N2O emissions generated from soil and the residual nitrate (NO3?) up to 2 m depth in field conditions in a maize crop under supplementary irrigation and fertilised with two nitrogen (N) sources (UAN and urea) at increasing N rates (0, 80, 160 and 250 kg N ha?1) in the Semi-arid Argentine Pampas. Methods: Throughout the crop cycle, emissions were monitored daily with static chambers during the first week after fertilisation; then sampling frequency was gradually reduced until the end of the experiment. Key results: There were no yield responses to the use of different sources and N rates. Crop N uptake saturated at 80 kg N ha?1, reaching 300?310 kg N ha?1. Residual NO3? increased significantly with the highest rates of N fertiliser. Total N2O emissions differed significantly only among fertiliser rates. The N2O emissions were lower at 80 than at 160 and 250 kg N ha?1. Conclusions: The N2O emissions measured were lower than those calculated by the IPCC, even when only direct emissions were considered. No grain yield increase was observed due to N fertilisation, with a non-limiting supply of N-NO3? at the beginning of the crop cycle and of N from mineralisation. Implications: This excess of N can generate negative environmental effects due to higher emissions of N2O and residual N-NO3? that can be leached. MenosContext: An appropriate use of the fertiliser technology may lead to a more efficient N absorption and to the reduction of economic and environmental costs. Aims: This study sought to quantify N2O emissions generated from soil and the residual nitrate (NO3?) up to 2 m depth in field conditions in a maize crop under supplementary irrigation and fertilised with two nitrogen (N) sources (UAN and urea) at increasing N rates (0, 80, 160 and 250 kg N ha?1) in the Semi-arid Argentine Pampas. Methods: Throughout the crop cycle, emissions were monitored daily with static chambers during the first week after fertilisation; then sampling frequency was gradually reduced until the end of the experiment. Key results: There were no yield responses to the use of different sources and N rates. Crop N uptake saturated at 80 kg N ha?1, reaching 300?310 kg N ha?1. Residual NO3? increased significantly with the highest rates of N fertiliser. Total N2O emissions differed significantly only among fertiliser rates. The N2O emissions were lower at 80 than at 160 and 250 kg N ha?1. Conclusions: The N2O emissions measured were lower than those calculated by the IPCC, even when only direct emissions were considered. No grain yield increase was observed due to N fertilisation, with a non-limiting supply of N-NO3? at the beginning of the crop cycle and of N from mineralisation. Implications: This excess of N can generate negative environmental effects due to higher emissions of N2O and residual N-NO3? th... Mostrar Tudo |
Palavras-Chave: |
Argentinean Pampa; Environmental effects; Maize yield; Nitrate leaching. |
Thesaurus Nal: |
Greenhouse gases; Irrigation; Urea. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02296naa a2200265 a 4500 001 2146959 005 2022-09-28 008 2022 bl uuuu u00u1 u #d 022 $a1838-675X 024 7 $ahttps://doi.org/10.1071/SR21094$2DOI 100 1 $aALVAREZ, C. 245 $aSoil nitrous oxide emissions in a maize (Zea mays L.) crop in response to nitrogen fertilisation.$h[electronic resource] 260 $c2022 520 $aContext: An appropriate use of the fertiliser technology may lead to a more efficient N absorption and to the reduction of economic and environmental costs. Aims: This study sought to quantify N2O emissions generated from soil and the residual nitrate (NO3?) up to 2 m depth in field conditions in a maize crop under supplementary irrigation and fertilised with two nitrogen (N) sources (UAN and urea) at increasing N rates (0, 80, 160 and 250 kg N ha?1) in the Semi-arid Argentine Pampas. Methods: Throughout the crop cycle, emissions were monitored daily with static chambers during the first week after fertilisation; then sampling frequency was gradually reduced until the end of the experiment. Key results: There were no yield responses to the use of different sources and N rates. Crop N uptake saturated at 80 kg N ha?1, reaching 300?310 kg N ha?1. Residual NO3? increased significantly with the highest rates of N fertiliser. Total N2O emissions differed significantly only among fertiliser rates. The N2O emissions were lower at 80 than at 160 and 250 kg N ha?1. Conclusions: The N2O emissions measured were lower than those calculated by the IPCC, even when only direct emissions were considered. No grain yield increase was observed due to N fertilisation, with a non-limiting supply of N-NO3? at the beginning of the crop cycle and of N from mineralisation. Implications: This excess of N can generate negative environmental effects due to higher emissions of N2O and residual N-NO3? that can be leached. 650 $aGreenhouse gases 650 $aIrrigation 650 $aUrea 653 $aArgentinean Pampa 653 $aEnvironmental effects 653 $aMaize yield 653 $aNitrate leaching 700 1 $aÁLVAREZ, C. R. 700 1 $aCOSTANTINI, A. O. 700 1 $aALVES, B. J. R. 773 $tSoil Research, Published online: 13 June 2022.
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1. | | GOUVEIA, A. L. S.; CARVALHO, E. J. M.; FREITAS, L. de S.; FIGUEIREDO, R. F. de; SOARES, H. G. Atributos físicos e produção de soja sob sistemas de manejo em latossolo amarelo no município de Redenção-PA. In: ENCONTRO AMAZÔNICO DE AGRÁRIAS, 5., 2013, Belém, PA. A importância da tecnologia e do empreendedorismo no desenvolvimento amazônico. Belém, PA: UFRA, 2013. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Amazônia Oriental. |
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2. | | VASCONCELOS, M. A. M.; FIGUEIREDO, R. F. de; SILVA, S. S. da; BARROS, D. de S.; KATO, O. R. Assessoria técnica inovadora e participativa para transição agroecológica no nordeste paraense. In: ENCONTRO AMAZÔNICO DE AGRÁRIAS, 4., 2012, Belém, PA. Agricultura familiar: mecanismos de desenvolvimento no cenário amazônico: anais. Belém, PA: UFRA, 2012. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Amazônia Oriental. |
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3. | | FIGUEIREDO, R. F. de; VASCONCELOS, M. A. M.; KATO, O. R.; FREITAS, L. de S.; SILVA, S. S. da. Zoneamento participativo e tipologia de sistemas de produção familiares - pista para uma intervenção dialogada de política pública no polo Rio Capim, nordeste paraense. In: ENCONTRO AMAZÔNICO DE AGRÁRIAS, 4., 2012, Belém, PA. Agricultura familiar: mecanismos de desenvolvimento no cenário amazônico: anais. Belém, PA: UFRA, 2012. 1 CD-ROM.Tipo: Artigo em Anais de Congresso |
Biblioteca(s): Embrapa Amazônia Oriental. |
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4. | | VASCONCELOS, M. A. M.; FIGUEIREDO, R. F. de; KATO, O. R.; SILVA, S. S. da; BARROS, D. de S.; PEDROSO, A. J. S.; FREITAS, L. de S.; BRONZE, A. B. da S. Estratégias familiares para transição agroecológica no Nordeste do Estado do Pará - Brasil. Cadernos de Agroecologia, v. 8, n. 2, nov. 2013. Resumos do VIII Congresso Brasileiro de Agroecologia - Porto Alegre/RS - 25 a 28/11/2013.Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 4 |
Biblioteca(s): Embrapa Amazônia Oriental. |
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Registros recuperados : 4 | |
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