Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield
Autor(a) principal: | |
---|---|
Data de Publicação: | 2020 |
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=S0103-84782020000600203 |
Resumo: | ABSTRACT: This study aimed to evaluate the effect of different levels of self-seeding Italian ryegrass (Lolium multiflorum Lam.) and nitrogen rates - applied additionally after two defoliations - on plant structure, in forage and seed yield. Levels of self-seeding were classified as very high (777 kg ha-1), high (736 kg ha-1), intermediate (624 kg ha-1), and low (234 kg ha-1). Populations were fertilized with zero, 20.25, 40.50, and 60.75 kg ha-1 of supplemental nitrogen applied after two defoliations; respectively, in very high, high, intermediate, and low levels. Higher levels of self-seeding promoted greater forage yield and uniformity of vegetation structure. Number of fertile tillers and number of seeds per plant have benefited by the combination of high self-seeding and supplemental nitrogen fertilization. Despite influencing the uniformity and amount of forage obtained in two defoliations, the very high and low self-seeding levels did not differ in Italian ryegrass seed production. However, linear addition for this same variable was obtained with the inclusion of supplemental nitrogen fertilization. In pastures from low and intermediate self-seeding levels, total dry mass increases linearly with the levels of nitrogen fertilization assessed in this research. |
id |
UFSM-2_417c269ad21c1d255b7938d1d6d89226 |
---|---|
oai_identifier_str |
oai:scielo:S0103-84782020000600203 |
network_acronym_str |
UFSM-2 |
network_name_str |
Ciência rural (Online) |
repository_id_str |
|
spelling |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield(Lolium multiflorum Lam.)natural reseedingnitrogen ratesseed yield components.ABSTRACT: This study aimed to evaluate the effect of different levels of self-seeding Italian ryegrass (Lolium multiflorum Lam.) and nitrogen rates - applied additionally after two defoliations - on plant structure, in forage and seed yield. Levels of self-seeding were classified as very high (777 kg ha-1), high (736 kg ha-1), intermediate (624 kg ha-1), and low (234 kg ha-1). Populations were fertilized with zero, 20.25, 40.50, and 60.75 kg ha-1 of supplemental nitrogen applied after two defoliations; respectively, in very high, high, intermediate, and low levels. Higher levels of self-seeding promoted greater forage yield and uniformity of vegetation structure. Number of fertile tillers and number of seeds per plant have benefited by the combination of high self-seeding and supplemental nitrogen fertilization. Despite influencing the uniformity and amount of forage obtained in two defoliations, the very high and low self-seeding levels did not differ in Italian ryegrass seed production. However, linear addition for this same variable was obtained with the inclusion of supplemental nitrogen fertilization. In pastures from low and intermediate self-seeding levels, total dry mass increases linearly with the levels of nitrogen fertilization assessed in this research.Universidade Federal de Santa Maria2020-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600203Ciência Rural v.50 n.6 2020reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20190510info:eu-repo/semantics/openAccessBohn,AlbertoBortolin,Gabriel StreckCastellanos,César Iván SuárezReis,Bruna Barreto dosSuñé,Anna dos SantosBonow,Joice Fernanda LübkePedroso,Carlos Eduardo da SilvaMittelmann,Andréaeng2020-06-02T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
title |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
spellingShingle |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield Bohn,Alberto (Lolium multiflorum Lam.) natural reseeding nitrogen rates seed yield components. |
title_short |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
title_full |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
title_fullStr |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
title_full_unstemmed |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
title_sort |
Nitrogen fertilization of self-seeding Italian ryegrass: effects on plant structure, forage and seed yield |
author |
Bohn,Alberto |
author_facet |
Bohn,Alberto Bortolin,Gabriel Streck Castellanos,César Iván Suárez Reis,Bruna Barreto dos Suñé,Anna dos Santos Bonow,Joice Fernanda Lübke Pedroso,Carlos Eduardo da Silva Mittelmann,Andréa |
author_role |
author |
author2 |
Bortolin,Gabriel Streck Castellanos,César Iván Suárez Reis,Bruna Barreto dos Suñé,Anna dos Santos Bonow,Joice Fernanda Lübke Pedroso,Carlos Eduardo da Silva Mittelmann,Andréa |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Bohn,Alberto Bortolin,Gabriel Streck Castellanos,César Iván Suárez Reis,Bruna Barreto dos Suñé,Anna dos Santos Bonow,Joice Fernanda Lübke Pedroso,Carlos Eduardo da Silva Mittelmann,Andréa |
dc.subject.por.fl_str_mv |
(Lolium multiflorum Lam.) natural reseeding nitrogen rates seed yield components. |
topic |
(Lolium multiflorum Lam.) natural reseeding nitrogen rates seed yield components. |
description |
ABSTRACT: This study aimed to evaluate the effect of different levels of self-seeding Italian ryegrass (Lolium multiflorum Lam.) and nitrogen rates - applied additionally after two defoliations - on plant structure, in forage and seed yield. Levels of self-seeding were classified as very high (777 kg ha-1), high (736 kg ha-1), intermediate (624 kg ha-1), and low (234 kg ha-1). Populations were fertilized with zero, 20.25, 40.50, and 60.75 kg ha-1 of supplemental nitrogen applied after two defoliations; respectively, in very high, high, intermediate, and low levels. Higher levels of self-seeding promoted greater forage yield and uniformity of vegetation structure. Number of fertile tillers and number of seeds per plant have benefited by the combination of high self-seeding and supplemental nitrogen fertilization. Despite influencing the uniformity and amount of forage obtained in two defoliations, the very high and low self-seeding levels did not differ in Italian ryegrass seed production. However, linear addition for this same variable was obtained with the inclusion of supplemental nitrogen fertilization. In pastures from low and intermediate self-seeding levels, total dry mass increases linearly with the levels of nitrogen fertilization assessed in this research. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-01-01 |
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=S0103-84782020000600203 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000600203 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20190510 |
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.50 n.6 2020 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_ |
1749140554772381696 |