Selection of maize genotypes for phosphosrus efficiency
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
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/14045 |
Resumo: | The aim of this work was to understand and evaluate some of the process linked with the plant nutrient efficiency, especially that for phosphorus, in nutrient solution. There were evaluated twelve maize (Zea mays L.) hybrids; nine from the CNPMS breeding program and three comercial hybrids, grown in Steinberg's nutrient solution tested against four P concentrations (0.3; 0.9; 2.7 and 5.4 mg l-1). Two experiments were then carried out: experiment 1; the nutrient solution was changed weekly and the plants harvested after 20 days growth, experiment 2; the nutrient solution was not changed and the harvest was realized as soon as the steady vegetative growth was reached. The dry weight of the shoot and roots were determined and analyzed for phosphorus. A significant difference among hybrids in P-efficiency utilization was observed. However these differences were basically due to the P concentration in the seeds rather than the genotypic variability and/or morphological, physiological and biochemistry differences in P-usage. Also the amounts of elements added somehow influenced the results. It was observed that the remaining seeds when removed from the seedlings did not overcome the seed effect. Hence, it is suggested that more efficient plant should be selected in field conditions, where a mature plant better caracterizes the nutrient efficiency. |
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Selection of maize genotypes for phosphosrus efficiencySeleção de genótipos de milho para eficiência a fósforoZea mays; absorption; utilization; genotipic differencesZea mays; absorção; utilização; diferenças genotípicasThe aim of this work was to understand and evaluate some of the process linked with the plant nutrient efficiency, especially that for phosphorus, in nutrient solution. There were evaluated twelve maize (Zea mays L.) hybrids; nine from the CNPMS breeding program and three comercial hybrids, grown in Steinberg's nutrient solution tested against four P concentrations (0.3; 0.9; 2.7 and 5.4 mg l-1). Two experiments were then carried out: experiment 1; the nutrient solution was changed weekly and the plants harvested after 20 days growth, experiment 2; the nutrient solution was not changed and the harvest was realized as soon as the steady vegetative growth was reached. The dry weight of the shoot and roots were determined and analyzed for phosphorus. A significant difference among hybrids in P-efficiency utilization was observed. However these differences were basically due to the P concentration in the seeds rather than the genotypic variability and/or morphological, physiological and biochemistry differences in P-usage. Also the amounts of elements added somehow influenced the results. It was observed that the remaining seeds when removed from the seedlings did not overcome the seed effect. Hence, it is suggested that more efficient plant should be selected in field conditions, where a mature plant better caracterizes the nutrient efficiency.Para melhor compreender alguns dos processos ligados à seleção de plantas mais eficientes na absorção e/ou utilização de fósforo em cultivos hidropônicos, realizaram-se dois ensaios com nove híbridos experimentais de milho (Zea mays L.) provenientes do programa de melhoramento do Centro Nacional de Pesquisa de Milho e Sorgo e três comerciais. Os diferentes híbridos foram cultivados em solução nutritiva de Steinberg em quatro doses de fósforo (0,3; 0,9; 2,7 e 5,4 mg l). No ensaio 1, a solução nutritiva foi trocada semanalmente e as plantas colhidas 20 dias após a aplicação dos tratamentos. No ensaio 2, não houve troca de solução, sendo a colheita realizada após a estabilização do desenvolvimento vegetativo. As plantas foram separadas em parte aérea e raiz e quantificou-se a matéria seca e a concentração de fósforo. Os resultados evidenciaram diferenças na eficiência para fósforo entre os doze híbridos. Entretanto, estas diferenças aconteceram mais em função do teor de fósforo na semente do que em virtude de diferenças genotípicas entre materiais. Houve, também, influência da quantidade de nutrientes na solução nos resultados obtidos. Constatou-se que a prática de se destacar as sementes remanescentes, após a germinação completa das plântulas, para minimizar a influência da semente, em ensaios de curta duração, não eliminou o problema. Portanto, deve-se procurar selecionar plantas mais eficientes em condições de campo.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAlves, Vera M. CarvalhoVasconcellos, Carlos AlbertoPitta, Gilson V. ExelMagnavaca, Ricardo2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/14045Pesquisa Agropecuaria Brasileira; v.23, n.10, out. 1988; 1083-1090Pesquisa Agropecuária Brasileira; v.23, n.10, out. 1988; 1083-10901678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/14045/8032info:eu-repo/semantics/openAccess2014-09-17T20:11:54Zoai:ojs.seer.sct.embrapa.br:article/14045Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-17T20:11:54Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Selection of maize genotypes for phosphosrus efficiency Seleção de genótipos de milho para eficiência a fósforo |
title |
Selection of maize genotypes for phosphosrus efficiency |
spellingShingle |
Selection of maize genotypes for phosphosrus efficiency Alves, Vera M. Carvalho Zea mays; absorption; utilization; genotipic differences Zea mays; absorção; utilização; diferenças genotípicas |
title_short |
Selection of maize genotypes for phosphosrus efficiency |
title_full |
Selection of maize genotypes for phosphosrus efficiency |
title_fullStr |
Selection of maize genotypes for phosphosrus efficiency |
title_full_unstemmed |
Selection of maize genotypes for phosphosrus efficiency |
title_sort |
Selection of maize genotypes for phosphosrus efficiency |
author |
Alves, Vera M. Carvalho |
author_facet |
Alves, Vera M. Carvalho Vasconcellos, Carlos Alberto Pitta, Gilson V. Exel Magnavaca, Ricardo |
author_role |
author |
author2 |
Vasconcellos, Carlos Alberto Pitta, Gilson V. Exel Magnavaca, Ricardo |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Alves, Vera M. Carvalho Vasconcellos, Carlos Alberto Pitta, Gilson V. Exel Magnavaca, Ricardo |
dc.subject.por.fl_str_mv |
Zea mays; absorption; utilization; genotipic differences Zea mays; absorção; utilização; diferenças genotípicas |
topic |
Zea mays; absorption; utilization; genotipic differences Zea mays; absorção; utilização; diferenças genotípicas |
description |
The aim of this work was to understand and evaluate some of the process linked with the plant nutrient efficiency, especially that for phosphorus, in nutrient solution. There were evaluated twelve maize (Zea mays L.) hybrids; nine from the CNPMS breeding program and three comercial hybrids, grown in Steinberg's nutrient solution tested against four P concentrations (0.3; 0.9; 2.7 and 5.4 mg l-1). Two experiments were then carried out: experiment 1; the nutrient solution was changed weekly and the plants harvested after 20 days growth, experiment 2; the nutrient solution was not changed and the harvest was realized as soon as the steady vegetative growth was reached. The dry weight of the shoot and roots were determined and analyzed for phosphorus. A significant difference among hybrids in P-efficiency utilization was observed. However these differences were basically due to the P concentration in the seeds rather than the genotypic variability and/or morphological, physiological and biochemistry differences in P-usage. Also the amounts of elements added somehow influenced the results. It was observed that the remaining seeds when removed from the seedlings did not overcome the seed effect. Hence, it is suggested that more efficient plant should be selected in field conditions, where a mature plant better caracterizes the nutrient efficiency. |
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/14045 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/14045 |
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/14045/8032 |
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.23, n.10, out. 1988; 1083-1090 Pesquisa Agropecuária Brasileira; v.23, n.10, out. 1988; 1083-1090 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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1793416693197832192 |