Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects
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/13860 |
Resumo: | The present experiment was conducted in Jaboticabal, SP, Brazil, with the objetive of evaluating the behavior of two genotypes of sunflower (Helianthus annuus L.) with respect to production of dry matter, and agronomic characteristics. The plan used was randomized blocks with four replications, and the treatment was composed of five sowing dates: January 20, February 20, March 5, March 20, April 5, with the hybrid Contissol 812 and the cultivar IAC-Anhandy, with 80 cm between rows and five plants per linear meter. The delay in the sowing date exercised a significant depressive effect on the production and distribution of dry matter kg/ha in the stem, leaves, head, and in the total, and also reduced significantly the number of days to the initiation of flowering, plant height, number of leaves, the diameter of the head and of the basal region of the stem. The production of grains was: 2,942, 2,005, 1,243, 1,073 and 809 kg/ha, as means in the two genotypes. It is concluded that the two genotypes studied behaved in the same way and that the sowings realized until the end of February were the best; for those realized later, the growth and development of the plants were affected negatively, resulting in undesirable levels of achene production. |
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Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspectsEfeito de datas de semeadura no comportamento de dois genótipos de girassol. I. Aspectos fenológicos e agronômicosdry matter; achene production; Helianthus annuusdata de plantio; matéria seca; produção de aqüênios; Helianthus annuusThe present experiment was conducted in Jaboticabal, SP, Brazil, with the objetive of evaluating the behavior of two genotypes of sunflower (Helianthus annuus L.) with respect to production of dry matter, and agronomic characteristics. The plan used was randomized blocks with four replications, and the treatment was composed of five sowing dates: January 20, February 20, March 5, March 20, April 5, with the hybrid Contissol 812 and the cultivar IAC-Anhandy, with 80 cm between rows and five plants per linear meter. The delay in the sowing date exercised a significant depressive effect on the production and distribution of dry matter kg/ha in the stem, leaves, head, and in the total, and also reduced significantly the number of days to the initiation of flowering, plant height, number of leaves, the diameter of the head and of the basal region of the stem. The production of grains was: 2,942, 2,005, 1,243, 1,073 and 809 kg/ha, as means in the two genotypes. It is concluded that the two genotypes studied behaved in the same way and that the sowings realized until the end of February were the best; for those realized later, the growth and development of the plants were affected negatively, resulting in undesirable levels of achene production. Este experimento foi realizado em Jaboticabal, SP, com o objetivo de se avaliar o comportamento de dois genótipos de girassol (Helianthus annuus L.) no tocante à produção de matéria seca e características agronômicas. Utilizou-se o híbrido Contissol 812 e a cultivar IAC-Anhandy com 80 cm entre linhas e 5 plantas por metro linear, em blocos casualizados, com quatro repetições em cinco datas de semeadura: 20.01, 20.02, 05.03, 20.03 e 05.04. O atraso das datas de semeadura exerceu efeito depressivo e significativo sobre a produção e distribuição de matéria seca (kg/ha) no caule, folha, capítulo e no total, reduzindo também significativamente o número de dias de emergência ao florescimento, a altura das plantas, o número de folhas, e os diâmetros do colo e do capítulo. A produção média de aquênios foi de: 2.942, 2.005, 1.243, 1.073 e 809 kg/ha, da primeira à última data, respectivamente, nos dois genótipos. Concluiu-se que os dois genótipos se comportaram de forma semelhante nas diferentes datas, e que as semeaduras realizadas até o final de fevereiro foram as melhores, e nas efetuadas posteriormente, o crescimento e o desenvolvimento das plantas foram afetados negativamente, levando a produção de aquênios a níveis indesejáveis. Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCampbell, Atys TenfussAthayde, Manoel L. F.2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13860Pesquisa Agropecuaria Brasileira; v.23, n.4, abr. 1988; 371-378Pesquisa Agropecuária Brasileira; v.23, n.4, abr. 1988; 371-3781678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13860/7864info:eu-repo/semantics/openAccess2014-09-11T17:38:35Zoai:ojs.seer.sct.embrapa.br:article/13860Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-11T17:38:35Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects Efeito de datas de semeadura no comportamento de dois genótipos de girassol. I. Aspectos fenológicos e agronômicos |
title |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
spellingShingle |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects Campbell, Atys Tenfuss dry matter; achene production; Helianthus annuus data de plantio; matéria seca; produção de aqüênios; Helianthus annuus |
title_short |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
title_full |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
title_fullStr |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
title_full_unstemmed |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
title_sort |
Effect of sowing date on the behavior of two genotypes of sunflower. I. Phenological and agronomical aspects |
author |
Campbell, Atys Tenfuss |
author_facet |
Campbell, Atys Tenfuss Athayde, Manoel L. F. |
author_role |
author |
author2 |
Athayde, Manoel L. F. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Campbell, Atys Tenfuss Athayde, Manoel L. F. |
dc.subject.por.fl_str_mv |
dry matter; achene production; Helianthus annuus data de plantio; matéria seca; produção de aqüênios; Helianthus annuus |
topic |
dry matter; achene production; Helianthus annuus data de plantio; matéria seca; produção de aqüênios; Helianthus annuus |
description |
The present experiment was conducted in Jaboticabal, SP, Brazil, with the objetive of evaluating the behavior of two genotypes of sunflower (Helianthus annuus L.) with respect to production of dry matter, and agronomic characteristics. The plan used was randomized blocks with four replications, and the treatment was composed of five sowing dates: January 20, February 20, March 5, March 20, April 5, with the hybrid Contissol 812 and the cultivar IAC-Anhandy, with 80 cm between rows and five plants per linear meter. The delay in the sowing date exercised a significant depressive effect on the production and distribution of dry matter kg/ha in the stem, leaves, head, and in the total, and also reduced significantly the number of days to the initiation of flowering, plant height, number of leaves, the diameter of the head and of the basal region of the stem. The production of grains was: 2,942, 2,005, 1,243, 1,073 and 809 kg/ha, as means in the two genotypes. It is concluded that the two genotypes studied behaved in the same way and that the sowings realized until the end of February were the best; for those realized later, the growth and development of the plants were affected negatively, resulting in undesirable levels of achene production. |
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/13860 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/13860 |
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/13860/7864 |
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.4, abr. 1988; 371-378 Pesquisa Agropecuária Brasileira; v.23, n.4, abr. 1988; 371-378 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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1793416716382896128 |