A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding

Detalhes bibliográficos
Autor(a) principal: Figueiredo, Nuno
Data de Publicação: 2019
Outros Autores: Carranca, Corina, Coutinho, João, Trindade, Henrique, Pereira, José, Marques, Paula, Varennes, Amarilis de
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
DOI: 10.19084/rca.16332
Texto Completo: https://doi.org/10.19084/rca.16332
Resumo: The “newly fixed” NH4+ in clay minerals should be considered for an efficient management of plant nutrition. In a clay-loam soil cultivated in 2012 with rice under intermittent flooding and conventional agronomic practices, the dynamics of pH, N-inorganic and non-exchangeable NH4+ was evaluated i) under field conditions, air temperature and atmospheric [CO2] (375 µmol mol-1 air) in Salvaterra de Magos (Portugal), and ii) under elevated temperature and temperature+[CO2] in controlled microclimate. For that, open-top chambers were used to simulate the conditions of an increased mean air temperature (2-3 °C), alone or combined with increased [CO2] (550 µmol mol-1 air). Non-exchangeable NH4+ was significantly higher under open-field conditions compared with the temperature elevation, with or without elevated atmospheric [CO2]. Temperature elevation reduced the “fixation” rate of the cation, while the CO2 concentration rise did not affect particularly the non-exchangeable form. Further studies are required for consolidation of these findings together with microbial communities and dynamics of C and N in soil.
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spelling A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent floodingA mudança climática na 'fixação' do amónio no solo durante o ciclo cultural de arroz (Oryza sativa) sob alagamento intermitente, em PortugalGeralThe “newly fixed” NH4+ in clay minerals should be considered for an efficient management of plant nutrition. In a clay-loam soil cultivated in 2012 with rice under intermittent flooding and conventional agronomic practices, the dynamics of pH, N-inorganic and non-exchangeable NH4+ was evaluated i) under field conditions, air temperature and atmospheric [CO2] (375 µmol mol-1 air) in Salvaterra de Magos (Portugal), and ii) under elevated temperature and temperature+[CO2] in controlled microclimate. For that, open-top chambers were used to simulate the conditions of an increased mean air temperature (2-3 °C), alone or combined with increased [CO2] (550 µmol mol-1 air). Non-exchangeable NH4+ was significantly higher under open-field conditions compared with the temperature elevation, with or without elevated atmospheric [CO2]. Temperature elevation reduced the “fixation” rate of the cation, while the CO2 concentration rise did not affect particularly the non-exchangeable form. Further studies are required for consolidation of these findings together with microbial communities and dynamics of C and N in soil.O NH4+ recém-“fixado” nos minerais argilosos deve ser considerado numa gestão eficiente da nutrição vegetal. Num solo argilo-limoso, localizado em Salvaterra de Magos (Portugal), cultivado em 2012 com arroz, sob alagamento intermitente e práticas agronómicas convencionais, avaliou-se a dinâmica do pH, N-inorgânico e NH4+ não-trocável i) em condições de campo, de temperatura do ar e [CO2] atmosférico (375 µmol mol-1), -, e de ii) aumento da temperatura e temperatura+[CO2] em microclima controlado. Foram utilizadas câmaras de topo aberto para simulação do aumento da temperatura média do ar (2-3 ºC), apenas ou combinado com aumento da [CO2] (550 µmol mol-1). Os resultados mostraram que o NH4+ “fixado” foi superior em condições de campo, em comparação com a elevação da temperatura, com ou sem elevação da [CO2]. A elevação da temperatura reduziu a taxa de “fixação” do catião, enquanto o aumento da [CO2] não afectou o NH4+ “fixado”. Mais estudos são necessários para a consolidação destes resultados, bem como da dinâmica do C, N e população microbiana no solo.Sociedade de Ciências Agrárias de Portugal2019-01-04T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://doi.org/10.19084/rca.16332eng2183-041X0871-018XFigueiredo, NunoCarranca, CorinaCoutinho, JoãoTrindade, HenriquePereira, JoséMarques, PaulaVarennes, Amarilis deinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-06T09:24:20Zoai:ojs.revistas.rcaap.pt:article/16332Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:30:47.718947Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
A mudança climática na 'fixação' do amónio no solo durante o ciclo cultural de arroz (Oryza sativa) sob alagamento intermitente, em Portugal
title A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
spellingShingle A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
Figueiredo, Nuno
Geral
Figueiredo, Nuno
Geral
title_short A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
title_full A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
title_fullStr A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
title_full_unstemmed A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
title_sort A climate change scenario and soil ammonium 'fixation' during the seasonal rice (Oryza sativa) growth in Portugal under intermittent flooding
author Figueiredo, Nuno
author_facet Figueiredo, Nuno
Figueiredo, Nuno
Carranca, Corina
Coutinho, João
Trindade, Henrique
Pereira, José
Marques, Paula
Varennes, Amarilis de
Carranca, Corina
Coutinho, João
Trindade, Henrique
Pereira, José
Marques, Paula
Varennes, Amarilis de
author_role author
author2 Carranca, Corina
Coutinho, João
Trindade, Henrique
Pereira, José
Marques, Paula
Varennes, Amarilis de
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Figueiredo, Nuno
Carranca, Corina
Coutinho, João
Trindade, Henrique
Pereira, José
Marques, Paula
Varennes, Amarilis de
dc.subject.por.fl_str_mv Geral
topic Geral
description The “newly fixed” NH4+ in clay minerals should be considered for an efficient management of plant nutrition. In a clay-loam soil cultivated in 2012 with rice under intermittent flooding and conventional agronomic practices, the dynamics of pH, N-inorganic and non-exchangeable NH4+ was evaluated i) under field conditions, air temperature and atmospheric [CO2] (375 µmol mol-1 air) in Salvaterra de Magos (Portugal), and ii) under elevated temperature and temperature+[CO2] in controlled microclimate. For that, open-top chambers were used to simulate the conditions of an increased mean air temperature (2-3 °C), alone or combined with increased [CO2] (550 µmol mol-1 air). Non-exchangeable NH4+ was significantly higher under open-field conditions compared with the temperature elevation, with or without elevated atmospheric [CO2]. Temperature elevation reduced the “fixation” rate of the cation, while the CO2 concentration rise did not affect particularly the non-exchangeable form. Further studies are required for consolidation of these findings together with microbial communities and dynamics of C and N in soil.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-04T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv https://doi.org/10.19084/rca.16332
url https://doi.org/10.19084/rca.16332
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2183-041X
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dc.publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
publisher.none.fl_str_mv Sociedade de Ciências Agrárias de Portugal
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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dc.identifier.doi.none.fl_str_mv 10.19084/rca.16332