Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions
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/16635 |
Resumo: | The effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production. |
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Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditionsÍndice de área foliar e adubação nitrogenada em arroznet assimilation rate; leaf area index; leaf area duration; nitrogen fertilization; upland ricetaxa de assimilação líquida; índice de área foliar; duração da área foliar; adubação nitrogenada; arroz de sequeiroThe effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production.Foi estudada a influência do nitrogênio no desenvolvimento do índice de área foliar (IAF) das cultivares IAC 47 e CICA 4. O nitrogênio incrementou o IAF de ambas as cultivares por aumentar o número de perfilhos e a dimensão das folhas. A cultivar CICA 4 alcançou maiores valores de IAF, devido à sua maior capacidade de perfilhamento. Esta mesma cultivar respondeu melhor à adubação nitrogenada no tocante à duração da área foliar (DAF), pois apresentou um incremento de 79,0%, com a aplicação de 90 kg de N/ha, comparativamente aos de 51,8% de aumento verificado na IAC 47. Esta maior resposta da DAF, da cultivar CICA 4, refletiu negativamente na produção, devido à deficiência hídrica. Por outro lado, a área foliar desenvolvida pela cultivar IAC 47 parece ter sido adequada, contribuindo para o aumento da produção.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraStone, Luis FernandoSteinmetz, Sílvio2014-04-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/16635Pesquisa Agropecuaria Brasileira; v.14, n.1, jan. 1979; 25-28Pesquisa Agropecuária Brasileira; v.14, n.1, jan. 1979; 25-281678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/16635/10938info:eu-repo/semantics/openAccess2014-04-15T19:21:29Zoai:ojs.seer.sct.embrapa.br:article/16635Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-15T19:21:29Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions Índice de área foliar e adubação nitrogenada em arroz |
title |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
spellingShingle |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions Stone, Luis Fernando net assimilation rate; leaf area index; leaf area duration; nitrogen fertilization; upland rice taxa de assimilação líquida; índice de área foliar; duração da área foliar; adubação nitrogenada; arroz de sequeiro |
title_short |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
title_full |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
title_fullStr |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
title_full_unstemmed |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
title_sort |
Nitrogen fertilization on the leaf area index of two rice cultivars under upland conditions |
author |
Stone, Luis Fernando |
author_facet |
Stone, Luis Fernando Steinmetz, Sílvio |
author_role |
author |
author2 |
Steinmetz, Sílvio |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Stone, Luis Fernando Steinmetz, Sílvio |
dc.subject.por.fl_str_mv |
net assimilation rate; leaf area index; leaf area duration; nitrogen fertilization; upland rice taxa de assimilação líquida; índice de área foliar; duração da área foliar; adubação nitrogenada; arroz de sequeiro |
topic |
net assimilation rate; leaf area index; leaf area duration; nitrogen fertilization; upland rice taxa de assimilação líquida; índice de área foliar; duração da área foliar; adubação nitrogenada; arroz de sequeiro |
description |
The effect of nitrogen fertilization on development of the Leaf Area Index (LAI) of the cultivars IAC 47 and CICA 4 was studied. Nitrogen increased the LAI in both cultivars due to its influence on the increment of the number of tillers and size of the leaves. The cultivar CICA 4 presented higher values of LAI due to its greater tillering capacity. Based on the Leaf Area Duration (LAD), CICA 4 showed a better response to the nitrogen fertilization (90 kg of N/ha) than IAC 47. The increment on LAD was 79% and 51,8% for the cultivars CICA 4 and IAC 47, respectively. This better response of LAD of cultivar CICA 4 reflected negatively in grain production due to occurrence of water deficiency. On the other hand, the leaf area developed by cultivar IAC 47 seems to have been adequate thereby contributing for the increase in production. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-15 |
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/16635 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/16635 |
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/16635/10938 |
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.14, n.1, jan. 1979; 25-28 Pesquisa Agropecuária Brasileira; v.14, n.1, jan. 1979; 25-28 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 |
_version_ |
1793416656738844672 |