Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000600152 |
Resumo: | ABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds’ high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations. |
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Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequenciesgerminationfungiLolium multiflorumaerial tillersABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds’ high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations.Universidade Federal de Santa Maria2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000600152Ciência Rural v.52 n.6 2022reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20200719info:eu-repo/semantics/openAccessCunha,Ricardo Pereira daBonow,Joice Fernanda LübkeMittelmann,AndréaMaia,Manoel de SouzaBohn,AlbertoOliveira,Roberto Caetano deSilva,Jéssica Dias Gomes daPedroso,Carlos Eduardo da Silvaeng2021-11-04T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
title |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
spellingShingle |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies Cunha,Ricardo Pereira da germination fungi Lolium multiflorum aerial tillers |
title_short |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
title_full |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
title_fullStr |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
title_full_unstemmed |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
title_sort |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies |
author |
Cunha,Ricardo Pereira da |
author_facet |
Cunha,Ricardo Pereira da Bonow,Joice Fernanda Lübke Mittelmann,Andréa Maia,Manoel de Souza Bohn,Alberto Oliveira,Roberto Caetano de Silva,Jéssica Dias Gomes da Pedroso,Carlos Eduardo da Silva |
author_role |
author |
author2 |
Bonow,Joice Fernanda Lübke Mittelmann,Andréa Maia,Manoel de Souza Bohn,Alberto Oliveira,Roberto Caetano de Silva,Jéssica Dias Gomes da Pedroso,Carlos Eduardo da Silva |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Cunha,Ricardo Pereira da Bonow,Joice Fernanda Lübke Mittelmann,Andréa Maia,Manoel de Souza Bohn,Alberto Oliveira,Roberto Caetano de Silva,Jéssica Dias Gomes da Pedroso,Carlos Eduardo da Silva |
dc.subject.por.fl_str_mv |
germination fungi Lolium multiflorum aerial tillers |
topic |
germination fungi Lolium multiflorum aerial tillers |
description |
ABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds’ high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000600152 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782022000600152 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20200719 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.52 n.6 2022 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140556917768192 |