Thermal time methods and sowing dates in phyllochron determination in wheat cultivars

Detalhes bibliográficos
Autor(a) principal: Rosa, Hamilton Telles
Data de Publicação: 2010
Outros Autores: Walter, Lidiane Cristine, Streck, Nereu Augusto, Alberto, Cleber Maus
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/2166
Resumo: The objective of this work was to evaluate the effect of degree-days and sowing dates calculation methods on phyllochron determination in wheat (Triticum aestivum) cultivars. A three-year field experiment with 13 sowing dates was conducted for three years (2005–2007) in Santa Maria, RS, Brazil, using six wheat cultivars: BRS Louro, CEP 52, CEP 51, BRS 177, Nova Era and BRS Tarumã. The phyllochron (°C day leaf-1) was estimated by the inverse of the slope of the linear regression of the Haun stage against the accumulated thermal time calculated using six methods. The thermal time calculation method affects wheat phyllochron estimates. The use of the three cardinal temperatures for leaf emission and cardinal temperatures compared to the minimum and maximum air temperatures improves the precision of the vegetative development simulation of this crop, in comparison to the other methods. The phyllochron varies with wheat cultivar and sowing date, and early cultivars (BRS Louro and CEP 51) have lower phyllochron than late cultivars (Nova Era and BRS Tarumã). The phyllochron is greater in sowings carried out during fall and winter than in the ones carried out during spring and summer.
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spelling Thermal time methods and sowing dates in phyllochron determination in wheat cultivarsMétodos de soma térmica e datas de semeadura na determinação de filocrono de cultivares de trigoTriticum aestivum; leaf appearance; plant development; photoperiod; temperatureTriticum aestivum; aparecimento de folhas; desenvolvimento vegetal; fotoperíodo; temperaturaThe objective of this work was to evaluate the effect of degree-days and sowing dates calculation methods on phyllochron determination in wheat (Triticum aestivum) cultivars. A three-year field experiment with 13 sowing dates was conducted for three years (2005–2007) in Santa Maria, RS, Brazil, using six wheat cultivars: BRS Louro, CEP 52, CEP 51, BRS 177, Nova Era and BRS Tarumã. The phyllochron (°C day leaf-1) was estimated by the inverse of the slope of the linear regression of the Haun stage against the accumulated thermal time calculated using six methods. The thermal time calculation method affects wheat phyllochron estimates. The use of the three cardinal temperatures for leaf emission and cardinal temperatures compared to the minimum and maximum air temperatures improves the precision of the vegetative development simulation of this crop, in comparison to the other methods. The phyllochron varies with wheat cultivar and sowing date, and early cultivars (BRS Louro and CEP 51) have lower phyllochron than late cultivars (Nova Era and BRS Tarumã). The phyllochron is greater in sowings carried out during fall and winter than in the ones carried out during spring and summer.O objetivo deste trabalho foi avaliar o efeito dos métodos de cálculo de graus-dia e de datas de semeadura na determinação do filocrono de cultivares de trigo (Triticum aestivum). Foi conduzido um experimento em campo, com 13 datas de semeadura, durante três anos (2005–2007), em Santa Maria, RS, usando-se seis cultivares de trigo: BRS Louro, CEP 52, CEP 51, BRS 177, Nova Era e BRS Tarumã. O filocrono (°C dia folha-1) foi estimado pelo inverso do coeficiente angular da regressão linear entre o estádio de Haun e a soma térmica acumulada calculada por seis métodos. O método de cálculo da soma térmica afeta as estimativas do filocrono em trigo.O uso das três temperaturas cardinais de emissão de folhas e a comparação das temperaturas cardinais com a temperatura mínima e máxima do ar melhora a precisão na simulação do desenvolvimento vegetativo dessa cultura, em comparação aos demais métodos. O filocrono varia com a cultivar de trigo e com a data de semeadura, e cultivares mais precoces (BRS Louro e CEP 51) têm menor filocrono do que cultivares tardias (Nova Era e BRS Tarumã). Em semeaduras no outono ou inverno, o filocrono é maior do que em semeaduras de primavera ou verão.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCAPES, CNPq e FAPERGSRosa, Hamilton TellesWalter, Lidiane CristineStreck, Nereu AugustoAlberto, Cleber Maus2010-12-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/2166Pesquisa Agropecuaria Brasileira; v.44, n.11, nov. 2009; 1347-1382Pesquisa Agropecuária Brasileira; v.44, n.11, nov. 2009; 1347-13821678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/2166/5863https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2166/1558info:eu-repo/semantics/openAccess2012-06-17T11:54:03Zoai:ojs.seer.sct.embrapa.br:article/2166Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-06-17T11:54:03Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
Métodos de soma térmica e datas de semeadura na determinação de filocrono de cultivares de trigo
title Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
spellingShingle Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
Rosa, Hamilton Telles
Triticum aestivum; leaf appearance; plant development; photoperiod; temperature
Triticum aestivum; aparecimento de folhas; desenvolvimento vegetal; fotoperíodo; temperatura
title_short Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
title_full Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
title_fullStr Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
title_full_unstemmed Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
title_sort Thermal time methods and sowing dates in phyllochron determination in wheat cultivars
author Rosa, Hamilton Telles
author_facet Rosa, Hamilton Telles
Walter, Lidiane Cristine
Streck, Nereu Augusto
Alberto, Cleber Maus
author_role author
author2 Walter, Lidiane Cristine
Streck, Nereu Augusto
Alberto, Cleber Maus
author2_role author
author
author
dc.contributor.none.fl_str_mv
CAPES, CNPq e FAPERGS
dc.contributor.author.fl_str_mv Rosa, Hamilton Telles
Walter, Lidiane Cristine
Streck, Nereu Augusto
Alberto, Cleber Maus
dc.subject.por.fl_str_mv Triticum aestivum; leaf appearance; plant development; photoperiod; temperature
Triticum aestivum; aparecimento de folhas; desenvolvimento vegetal; fotoperíodo; temperatura
topic Triticum aestivum; leaf appearance; plant development; photoperiod; temperature
Triticum aestivum; aparecimento de folhas; desenvolvimento vegetal; fotoperíodo; temperatura
description The objective of this work was to evaluate the effect of degree-days and sowing dates calculation methods on phyllochron determination in wheat (Triticum aestivum) cultivars. A three-year field experiment with 13 sowing dates was conducted for three years (2005–2007) in Santa Maria, RS, Brazil, using six wheat cultivars: BRS Louro, CEP 52, CEP 51, BRS 177, Nova Era and BRS Tarumã. The phyllochron (°C day leaf-1) was estimated by the inverse of the slope of the linear regression of the Haun stage against the accumulated thermal time calculated using six methods. The thermal time calculation method affects wheat phyllochron estimates. The use of the three cardinal temperatures for leaf emission and cardinal temperatures compared to the minimum and maximum air temperatures improves the precision of the vegetative development simulation of this crop, in comparison to the other methods. The phyllochron varies with wheat cultivar and sowing date, and early cultivars (BRS Louro and CEP 51) have lower phyllochron than late cultivars (Nova Era and BRS Tarumã). The phyllochron is greater in sowings carried out during fall and winter than in the ones carried out during spring and summer.
publishDate 2010
dc.date.none.fl_str_mv 2010-12-07
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/2166
url https://seer.sct.embrapa.br/index.php/pab/article/view/2166
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/2166/5863
https://seer.sct.embrapa.br/index.php/pab/article/downloadSuppFile/2166/1558
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.44, n.11, nov. 2009; 1347-1382
Pesquisa Agropecuária Brasileira; v.44, n.11, nov. 2009; 1347-1382
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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