Forage productivity and morphogenesis of Axonopus aureus under different nitrogen fertilization rates

Detalhes bibliográficos
Autor(a) principal: Costa,Newton de Lucena
Data de Publicação: 2013
Outros Autores: Moraes,Anibal de, Monteiro,Alda Lúcia Gomes, Motta,Antonio Carlos Vargas, Oliveira,Ricardo Augusto de, Rodrigues,Antonio Neri Azevedo
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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spelling 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
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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)
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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)
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