The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea)
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo de conferência |
Idioma: | por |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10174/12904 |
Resumo: | Abstract Culinary use of purslane (Portulaca oleracea L.) is appreciated across the whole of the Mediterranean, and the interest in this plant has been increasing due to be a source of bio-protectives compounds, such as fatty acids and antioxidants. However, their use may be difficult due to the accumulation of high contents of compounds harmful to human health, such as nitrate and oxalic acid. The main objective of the present study was to evaluate the influence of nitrogen fertilization on growth and yield parameters, and on nitrate and oxalic acid concentration in leaves and stems. Plants of golden-leafed purslane of sativa subspecies were grown in styrofoam boxes with substrate and fertigated 2 times per week along 4 weeks with ammonium-nitrate solution (16.9% NO3--N and 17.6% NH4+-N), for testing 4 nitrogen levels (0, 30, 60 and 90 kg N ha-1). Plant growth, yield, nitrate and oxalic acid concentrations were significantly affected by nitrogen application. The best quantity/quality ratio was achieved in fertilization level of 60 kg N ha-1, in which the yield was 5.1 kg m-2 FW and nitrate concentration was 48.98 and 43.90 mg g-1 DW in leaf and stem, respectively, and oxalic acid concentration was 1.27 and 0.55 mg g-1 DW, in leaf and stem, respectively, values not harmful to consumer health. |
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The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea)Portulaca oleraceanitrogen fertilizationnitrateoxalic acidAbstract Culinary use of purslane (Portulaca oleracea L.) is appreciated across the whole of the Mediterranean, and the interest in this plant has been increasing due to be a source of bio-protectives compounds, such as fatty acids and antioxidants. However, their use may be difficult due to the accumulation of high contents of compounds harmful to human health, such as nitrate and oxalic acid. The main objective of the present study was to evaluate the influence of nitrogen fertilization on growth and yield parameters, and on nitrate and oxalic acid concentration in leaves and stems. Plants of golden-leafed purslane of sativa subspecies were grown in styrofoam boxes with substrate and fertigated 2 times per week along 4 weeks with ammonium-nitrate solution (16.9% NO3--N and 17.6% NH4+-N), for testing 4 nitrogen levels (0, 30, 60 and 90 kg N ha-1). Plant growth, yield, nitrate and oxalic acid concentrations were significantly affected by nitrogen application. The best quantity/quality ratio was achieved in fertilization level of 60 kg N ha-1, in which the yield was 5.1 kg m-2 FW and nitrate concentration was 48.98 and 43.90 mg g-1 DW in leaf and stem, respectively, and oxalic acid concentration was 1.27 and 0.55 mg g-1 DW, in leaf and stem, respectively, values not harmful to consumer health.2015-02-24T17:51:11Z2015-02-242014-09-29T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/12904http://hdl.handle.net/10174/12904pornaonaosimICAAMndrmam@uevora.ptndnd582Santos, R.VMachado, RMAAlves- Pereira, IFerreira, Ruiinfo: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:RCAAP2024-01-03T18:57:13Zoai:dspace.uevora.pt:10174/12904Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:06:07.002049Repositório 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 |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
title |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
spellingShingle |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) Santos, R.V Portulaca oleracea nitrogen fertilization nitrate oxalic acid |
title_short |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
title_full |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
title_fullStr |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
title_full_unstemmed |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
title_sort |
The Influence of Nitrogen Fertilization on Growth, Yield and Nitrate and Oxalic Acid Concentration in Purslane (Portulaca oleracea) |
author |
Santos, R.V |
author_facet |
Santos, R.V Machado, RMA Alves- Pereira, I Ferreira, Rui |
author_role |
author |
author2 |
Machado, RMA Alves- Pereira, I Ferreira, Rui |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Santos, R.V Machado, RMA Alves- Pereira, I Ferreira, Rui |
dc.subject.por.fl_str_mv |
Portulaca oleracea nitrogen fertilization nitrate oxalic acid |
topic |
Portulaca oleracea nitrogen fertilization nitrate oxalic acid |
description |
Abstract Culinary use of purslane (Portulaca oleracea L.) is appreciated across the whole of the Mediterranean, and the interest in this plant has been increasing due to be a source of bio-protectives compounds, such as fatty acids and antioxidants. However, their use may be difficult due to the accumulation of high contents of compounds harmful to human health, such as nitrate and oxalic acid. The main objective of the present study was to evaluate the influence of nitrogen fertilization on growth and yield parameters, and on nitrate and oxalic acid concentration in leaves and stems. Plants of golden-leafed purslane of sativa subspecies were grown in styrofoam boxes with substrate and fertigated 2 times per week along 4 weeks with ammonium-nitrate solution (16.9% NO3--N and 17.6% NH4+-N), for testing 4 nitrogen levels (0, 30, 60 and 90 kg N ha-1). Plant growth, yield, nitrate and oxalic acid concentrations were significantly affected by nitrogen application. The best quantity/quality ratio was achieved in fertilization level of 60 kg N ha-1, in which the yield was 5.1 kg m-2 FW and nitrate concentration was 48.98 and 43.90 mg g-1 DW in leaf and stem, respectively, and oxalic acid concentration was 1.27 and 0.55 mg g-1 DW, in leaf and stem, respectively, values not harmful to consumer health. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-09-29T00:00:00Z 2015-02-24T17:51:11Z 2015-02-24 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10174/12904 http://hdl.handle.net/10174/12904 |
url |
http://hdl.handle.net/10174/12904 |
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por |
language |
por |
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nao nao sim ICAAM nd rmam@uevora.pt nd nd 582 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799136546367995904 |