Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista Brasileira de Zootecnia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002 |
Resumo: | The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75 cm/tiller per day); 155.5 (17.23 cm); 185.5 (7.55 leaves/tiller) and 185.3 (2.22) kg N ha-1, respectively. Tiller population density and leaf senescence rate are directly proportional to increase in N rates, and the opposite occurs for N utilization efficiency and apparent N recovery. |
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Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization ratesdry weightleafsenescencetilleringThe effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75 cm/tiller per day); 155.5 (17.23 cm); 185.5 (7.55 leaves/tiller) and 185.3 (2.22) kg N ha-1, respectively. Tiller population density and leaf senescence rate are directly proportional to increase in N rates, and the opposite occurs for N utilization efficiency and apparent N recovery.Sociedade Brasileira de Zootecnia2013-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002Revista Brasileira de Zootecnia v.42 n.8 2013reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982013000800002info:eu-repo/semantics/openAccessCosta,Newton de LucenaMoraes,Anibal deMonteiro,Alda Lúcia GomesMotta,Antonio Carlos VargasOliveira,Ricardo Augusto deRodrigues,Antonio Neri Azevedoeng2013-07-23T00:00:00Zoai:scielo:S1516-35982013000800002Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2013-07-23T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false |
dc.title.none.fl_str_mv |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
title |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
spellingShingle |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates Costa,Newton de Lucena dry weight leaf senescence tillering |
title_short |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
title_full |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
title_fullStr |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
title_full_unstemmed |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
title_sort |
Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates |
author |
Costa,Newton de Lucena |
author_facet |
Costa,Newton de Lucena Moraes,Anibal de Monteiro,Alda Lúcia Gomes Motta,Antonio Carlos Vargas Oliveira,Ricardo Augusto de Rodrigues,Antonio Neri Azevedo |
author_role |
author |
author2 |
Moraes,Anibal de Monteiro,Alda Lúcia Gomes Motta,Antonio Carlos Vargas Oliveira,Ricardo Augusto de Rodrigues,Antonio Neri Azevedo |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Costa,Newton de Lucena Moraes,Anibal de Monteiro,Alda Lúcia Gomes Motta,Antonio Carlos Vargas Oliveira,Ricardo Augusto de Rodrigues,Antonio Neri Azevedo |
dc.subject.por.fl_str_mv |
dry weight leaf senescence tillering |
topic |
dry weight leaf senescence tillering |
description |
The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75 cm/tiller per day); 155.5 (17.23 cm); 185.5 (7.55 leaves/tiller) and 185.3 (2.22) kg N ha-1, respectively. Tiller population density and leaf senescence rate are directly proportional to increase in N rates, and the opposite occurs for N utilization efficiency and apparent N recovery. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-08-01 |
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=S1516-35982013000800002 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-35982013000800002 |
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 |
Sociedade Brasileira de Zootecnia |
publisher.none.fl_str_mv |
Sociedade Brasileira de Zootecnia |
dc.source.none.fl_str_mv |
Revista Brasileira de Zootecnia v.42 n.8 2013 reponame:Revista Brasileira de Zootecnia (Online) instname:Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ |
instname_str |
Sociedade Brasileira de Zootecnia (SBZ) |
instacron_str |
SBZ |
institution |
SBZ |
reponame_str |
Revista Brasileira de Zootecnia (Online) |
collection |
Revista Brasileira de Zootecnia (Online) |
repository.name.fl_str_mv |
Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ) |
repository.mail.fl_str_mv |
||bz@sbz.org.br|| secretariarbz@sbz.org.br |
_version_ |
1750318150866436096 |