Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species

Detalhes bibliográficos
Autor(a) principal: Ruschel, Alaides Puppin
Data de Publicação: 2014
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Brasileira (Online)
Texto Completo: https://seer.sct.embrapa.br/index.php/pab/article/view/14390
Resumo: A field trial was set up to study the seasonal effect on Azollagrowth, nitrogenase activity, simbiotic nitrogen fixation and P accumulation in an experiment repeated, monthly, June 1983 to August 1984 at Piracicaba, São Paulo, Brazil, being plants growing for 21 days. Five Azolla species (A. caroliniana, A. filiculoides, A. microphylla, A. mexicana and A. pinnata) were studied. There was a differential effect among species related to the time of the year for all parameters analysed. All species showed high yield and N-content in November (late spring). Maximum yield and total nitrogen over longer periods were shown by A. filiculoides and A. microphylla. The average ratio plant weight/ plant dry weight was above 25. Nitrogenase activity varied among species at winter time only. Maximum N-yields were 29, 29 and 37 kg/ha of N for A. filiculoides, A. mexicana, A. microphylla respectivelly, and for P accumulation 3.1, 3.6, and 4.6 kg/ha of P respectivelly. The poorest development for all species occurred during summer (January and February).
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spelling Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla speciesEfeito sazonal sobre o desenvolvimento e fixação biológica de nitrogênio de diferentes espécies de Azollanitrogenase; phosphorusnitrogenase; fósforoA field trial was set up to study the seasonal effect on Azollagrowth, nitrogenase activity, simbiotic nitrogen fixation and P accumulation in an experiment repeated, monthly, June 1983 to August 1984 at Piracicaba, São Paulo, Brazil, being plants growing for 21 days. Five Azolla species (A. caroliniana, A. filiculoides, A. microphylla, A. mexicana and A. pinnata) were studied. There was a differential effect among species related to the time of the year for all parameters analysed. All species showed high yield and N-content in November (late spring). Maximum yield and total nitrogen over longer periods were shown by A. filiculoides and A. microphylla. The average ratio plant weight/ plant dry weight was above 25. Nitrogenase activity varied among species at winter time only. Maximum N-yields were 29, 29 and 37 kg/ha of N for A. filiculoides, A. mexicana, A. microphylla respectivelly, and for P accumulation 3.1, 3.6, and 4.6 kg/ha of P respectivelly. The poorest development for all species occurred during summer (January and February).Foi conduzido um experimento de campo, com cinco espécies de Azolla, a fim de pesquisar o efeito sazonal sobre o desenvolvimento (peso da planta), a atividade da nitrogenase e os teores de nitrogênio e fósforo acumulados nas plantas. O experimento foi repetido, mensalmente, de junho de 1983 até agosto de 1984, em Piracicaba, SP, permanecendo as plantas por 21 dias sob condições experimentais em cada época. Foram estudadas as espécies A. caroliniana, A. filiculoides, A. microphylla, A. mexicana e A. pinnata. Todas as espécies apresentaram o máximo de produção (peso planta) e de N total, no mês de novembro. As espécies que apresentaram melhor desenvolvimento durante o período mais longo foram a A. filiculoides e a A. microphylla. A relação matéria verde/matéria seca esteve, em média, acima de 25. A atividade da nitrogenase variou somente no período de clima frio. Os níveis máximos de nitrogênio acumulados foram 29, 29 e 37 kg/ha, e de P absorvido 3,1; 3,6 e 4,6 kg/ha respectivamente, pela A. filiculoides, A. mexicana, A. microphylla. A época de menor desenvolvimento da Azolla deu-se em pleno verão (janeiro e fevereiro).Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraRuschel, Alaides Puppin2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14390Pesquisa Agropecuaria Brasileira; v.22, n.6, jun. 1987; 559-565Pesquisa Agropecuária Brasileira; v.22, n.6, jun. 1987; 559-5651678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14390/8287info:eu-repo/semantics/openAccess2014-10-06T17:49:33Zoai:ojs.seer.sct.embrapa.br:article/14390Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-10-06T17:49:33Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
Efeito sazonal sobre o desenvolvimento e fixação biológica de nitrogênio de diferentes espécies de Azolla
title Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
spellingShingle Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
Ruschel, Alaides Puppin
nitrogenase; phosphorus
nitrogenase; fósforo
title_short Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
title_full Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
title_fullStr Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
title_full_unstemmed Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
title_sort Seasonal effect on growth and simbiotic nitrogen fixation of different Azolla species
author Ruschel, Alaides Puppin
author_facet Ruschel, Alaides Puppin
author_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Ruschel, Alaides Puppin
dc.subject.por.fl_str_mv nitrogenase; phosphorus
nitrogenase; fósforo
topic nitrogenase; phosphorus
nitrogenase; fósforo
description A field trial was set up to study the seasonal effect on Azollagrowth, nitrogenase activity, simbiotic nitrogen fixation and P accumulation in an experiment repeated, monthly, June 1983 to August 1984 at Piracicaba, São Paulo, Brazil, being plants growing for 21 days. Five Azolla species (A. caroliniana, A. filiculoides, A. microphylla, A. mexicana and A. pinnata) were studied. There was a differential effect among species related to the time of the year for all parameters analysed. All species showed high yield and N-content in November (late spring). Maximum yield and total nitrogen over longer periods were shown by A. filiculoides and A. microphylla. The average ratio plant weight/ plant dry weight was above 25. Nitrogenase activity varied among species at winter time only. Maximum N-yields were 29, 29 and 37 kg/ha of N for A. filiculoides, A. mexicana, A. microphylla respectivelly, and for P accumulation 3.1, 3.6, and 4.6 kg/ha of P respectivelly. The poorest development for all species occurred during summer (January and February).
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
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/14390
url https://seer.sct.embrapa.br/index.php/pab/article/view/14390
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://seer.sct.embrapa.br/index.php/pab/article/view/14390/8287
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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.22, n.6, jun. 1987; 559-565
Pesquisa Agropecuária Brasileira; v.22, n.6, jun. 1987; 559-565
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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