Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/26843 |
Resumo: | The objective of this work was to evaluate the effects of nitrogen fertilizers on the N dynamics and grain yield in flooded rice (Oryza sativa) cultivation in Brazilian tropical wetland. The experiment was carried out in a randomized complete block design with six treatments, as follows: common and protected urea; topdressing application of N doses (30, 70, and 150 kg ha-1); and one control treatment, without N fertilization. Emissions of N2O-N, global warming potential (pGWP), emission factors (EF) for mineral fertilizers, grain yield, emission intensity, nitrate, ammonium, pH, and potential redox were quantified. Gas sampling was carried out in two crop seasons of rice cultivation and in one off-season. During the flooded period of the two crop seasons, N2O fluxes did not exceed 862.41 μg m-2 h-1 N2O-N; in the off-season, the fluxes varied from -52.95 to 274.34 μg m-2 h-1 N2O-N. Consistent emission peaks were observed in soil draining before harvest, when the highest rate of both N sources was used, and also in the control treatment in the off-season. Protected urea does not reduce N2O emissions or EF. Nitrogen increases the grain yield. Protected urea does not have any effect on the pGWP. The concentrations of NO3- and NH4+ in the soil are not related to N2O fluxes. |
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Emission of nitrous oxide in flooded rice cultivation in tropical area of BrazilEmissão de óxido nitroso em cultivo de arroz inundado em área tropical do BrasilOryza sativa; climate change; emission factor; greenhouse gases; nitrogen use efficiencyOryza sativa; mudanças climáticas; fator de emissão; gases de efeito estufa; eficiência de uso de nitrogênioThe objective of this work was to evaluate the effects of nitrogen fertilizers on the N dynamics and grain yield in flooded rice (Oryza sativa) cultivation in Brazilian tropical wetland. The experiment was carried out in a randomized complete block design with six treatments, as follows: common and protected urea; topdressing application of N doses (30, 70, and 150 kg ha-1); and one control treatment, without N fertilization. Emissions of N2O-N, global warming potential (pGWP), emission factors (EF) for mineral fertilizers, grain yield, emission intensity, nitrate, ammonium, pH, and potential redox were quantified. Gas sampling was carried out in two crop seasons of rice cultivation and in one off-season. During the flooded period of the two crop seasons, N2O fluxes did not exceed 862.41 μg m-2 h-1 N2O-N; in the off-season, the fluxes varied from -52.95 to 274.34 μg m-2 h-1 N2O-N. Consistent emission peaks were observed in soil draining before harvest, when the highest rate of both N sources was used, and also in the control treatment in the off-season. Protected urea does not reduce N2O emissions or EF. Nitrogen increases the grain yield. Protected urea does not have any effect on the pGWP. The concentrations of NO3- and NH4+ in the soil are not related to N2O fluxes.O objetivo deste trabalho foi avaliar os efeitos dos fertilizantes nitrogenados na dinâmica do N e na produtividade de arroz (Oryza sativa) inundado em áreas úmidas tropicais Brasileiras. O experimento foi realizado em delineamento de blocos ao acaso, com seis tratamentos: ureia comum e protegida; doses de N (30, 70 e 150 kg ha-1) em cobertura; e controle, sem fertilização com N. Foram quantificados emissões de N-N2O, potencial de aquecimento global (pGWP), fatores de emissão (EF) para fertilizantes minerais, rendimento de grãos, intensidade de emissão, nitrato, amônio, pH e potencial redox. As amostragens foram realizadas em duas safras e na entressafra do arroz. Durante o período de inundação das duas safras, os fluxos de N-N2O não excederam 862,41μg m2 h1; no período de entressafra, os fluxos variaram de -52,95 a 274,34 μg m-2 h-1 N-N2O. Observaram-se picos de emissão consistentes na drenagem do solo, antes da colheita, quando a dose mais alta de ambas as fontes de N foi utilizada, e também no controle na entressafra. A ureia protegida não reduz as emissões de N2O ou EF. O nitrogênio aumenta o rendimento de grãos. A ureia protegida não afeta o pGWP. As concentrações de NO3- e NH4+ no solo não estão relacionadas aos fluxos de N2O.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraConselho Nacional de Desenvolvimento Científico e TecnológicoCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorBiotechnology and Biological Sciences Research CouncilEmpresa Brasileira de Pesquisa AgropecuáriaConselho Nacional de Desenvolvimento Científico e TecnológicoCoordenação de Aperfeiçoamento de Pessoal de Nível SuperiorBiotechnology and Biological Sciences Research CouncilEmpresa Brasileira de Pesquisa AgropecuáriaMascarenhas, Yoná SerpaSilva, Melissa Ananias Soler daCorrechel, VládiaSantos, Alberto Baêta dosCarvalho, Márcia Thaís de MeloMadari, Beáta EmökeCoelho, Alexandre SiqueiraGonçalves, Gustavo Melo de OliveiraCaetano, Pedro Henrique Pereira2020-12-14info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/26843Pesquisa Agropecuaria Brasileira; V.55, Jan./Dec., 2020: Publicação contínua em volume anual; e01497Pesquisa Agropecuária Brasileira; V.55, Jan./Dec., 2020: Publicação contínua em volume anual; e014971678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAenghttps://seer.sct.embrapa.br/index.php/pab/article/view/26843/14805Direitos autorais 2020 Pesquisa Agropecuária Brasileirainfo:eu-repo/semantics/openAccess2022-05-18T18:26:38Zoai:ojs.seer.sct.embrapa.br:article/26843Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2022-05-18T18:26:38Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil Emissão de óxido nitroso em cultivo de arroz inundado em área tropical do Brasil |
title |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
spellingShingle |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil Mascarenhas, Yoná Serpa Oryza sativa; climate change; emission factor; greenhouse gases; nitrogen use efficiency Oryza sativa; mudanças climáticas; fator de emissão; gases de efeito estufa; eficiência de uso de nitrogênio |
title_short |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
title_full |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
title_fullStr |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
title_full_unstemmed |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
title_sort |
Emission of nitrous oxide in flooded rice cultivation in tropical area of Brazil |
author |
Mascarenhas, Yoná Serpa |
author_facet |
Mascarenhas, Yoná Serpa Silva, Melissa Ananias Soler da Correchel, Vládia Santos, Alberto Baêta dos Carvalho, Márcia Thaís de Melo Madari, Beáta Emöke Coelho, Alexandre Siqueira Gonçalves, Gustavo Melo de Oliveira Caetano, Pedro Henrique Pereira |
author_role |
author |
author2 |
Silva, Melissa Ananias Soler da Correchel, Vládia Santos, Alberto Baêta dos Carvalho, Márcia Thaís de Melo Madari, Beáta Emöke Coelho, Alexandre Siqueira Gonçalves, Gustavo Melo de Oliveira Caetano, Pedro Henrique Pereira |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Biotechnology and Biological Sciences Research Council Empresa Brasileira de Pesquisa Agropecuária Conselho Nacional de Desenvolvimento Científico e Tecnológico Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Biotechnology and Biological Sciences Research Council Empresa Brasileira de Pesquisa Agropecuária |
dc.contributor.author.fl_str_mv |
Mascarenhas, Yoná Serpa Silva, Melissa Ananias Soler da Correchel, Vládia Santos, Alberto Baêta dos Carvalho, Márcia Thaís de Melo Madari, Beáta Emöke Coelho, Alexandre Siqueira Gonçalves, Gustavo Melo de Oliveira Caetano, Pedro Henrique Pereira |
dc.subject.por.fl_str_mv |
Oryza sativa; climate change; emission factor; greenhouse gases; nitrogen use efficiency Oryza sativa; mudanças climáticas; fator de emissão; gases de efeito estufa; eficiência de uso de nitrogênio |
topic |
Oryza sativa; climate change; emission factor; greenhouse gases; nitrogen use efficiency Oryza sativa; mudanças climáticas; fator de emissão; gases de efeito estufa; eficiência de uso de nitrogênio |
description |
The objective of this work was to evaluate the effects of nitrogen fertilizers on the N dynamics and grain yield in flooded rice (Oryza sativa) cultivation in Brazilian tropical wetland. The experiment was carried out in a randomized complete block design with six treatments, as follows: common and protected urea; topdressing application of N doses (30, 70, and 150 kg ha-1); and one control treatment, without N fertilization. Emissions of N2O-N, global warming potential (pGWP), emission factors (EF) for mineral fertilizers, grain yield, emission intensity, nitrate, ammonium, pH, and potential redox were quantified. Gas sampling was carried out in two crop seasons of rice cultivation and in one off-season. During the flooded period of the two crop seasons, N2O fluxes did not exceed 862.41 μg m-2 h-1 N2O-N; in the off-season, the fluxes varied from -52.95 to 274.34 μg m-2 h-1 N2O-N. Consistent emission peaks were observed in soil draining before harvest, when the highest rate of both N sources was used, and also in the control treatment in the off-season. Protected urea does not reduce N2O emissions or EF. Nitrogen increases the grain yield. Protected urea does not have any effect on the pGWP. The concentrations of NO3- and NH4+ in the soil are not related to N2O fluxes. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-14 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/26843 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/26843 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/26843/14805 |
dc.rights.driver.fl_str_mv |
Direitos autorais 2020 Pesquisa Agropecuária Brasileira info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Direitos autorais 2020 Pesquisa Agropecuária Brasileira |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; V.55, Jan./Dec., 2020: Publicação contínua em volume anual; e01497 Pesquisa Agropecuária Brasileira; V.55, Jan./Dec., 2020: Publicação contínua em volume anual; e01497 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416671711461376 |