Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes
Autor(a) principal: | |
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Data de Publicação: | 2017 |
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=S0103-84782017000200403 |
Resumo: | ABSTRACT: The silvopastoral system has been suggested as an alternative to recover degraded pastures in tropical regions. However, trees reduce the light available for pastures, which may affect the growth and herbage accumulation. The objective of this study was to evaluate the morphogenesis, canopy structure and herbage accumulation of signalgrass ( Brachiaria decumbens ) subjected to three light regimes (0, 20 and 70% of natural shading) and two fertilization levels (presence or absence of nitrogen, phosphorus and potassium). Leaf and stem elongation rates increased under shading but did not vary with fertilization. The leaf appearance rate was greater under fertilizer treatment but was generally similar among light regimes. The tiller density was greater in full sun and lower in intense shading. Tiller density responded to fertilization under full sun and moderate shading. Herbage accumulation increased by 42% with fertilization under full sun, 12% under moderate shading and did not vary under intense shading. Results showed that even under fertilization the herbage accumulation was limited by reduced light. However, under moderate shade the fertilization was important to raise tiller population over the growth cycles. |
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Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimesBrachiaria decumbensmorphogenesisshadingsilvopastoral systemtiller densityABSTRACT: The silvopastoral system has been suggested as an alternative to recover degraded pastures in tropical regions. However, trees reduce the light available for pastures, which may affect the growth and herbage accumulation. The objective of this study was to evaluate the morphogenesis, canopy structure and herbage accumulation of signalgrass ( Brachiaria decumbens ) subjected to three light regimes (0, 20 and 70% of natural shading) and two fertilization levels (presence or absence of nitrogen, phosphorus and potassium). Leaf and stem elongation rates increased under shading but did not vary with fertilization. The leaf appearance rate was greater under fertilizer treatment but was generally similar among light regimes. The tiller density was greater in full sun and lower in intense shading. Tiller density responded to fertilization under full sun and moderate shading. Herbage accumulation increased by 42% with fertilization under full sun, 12% under moderate shading and did not vary under intense shading. Results showed that even under fertilization the herbage accumulation was limited by reduced light. However, under moderate shade the fertilization was important to raise tiller population over the growth cycles.Universidade Federal de Santa Maria2017-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200403Ciência Rural v.47 n.2 2017reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20160472info:eu-repo/semantics/openAccessLopes,Clenardo MacedoPaciullo,Domingos Sávio CamposAraújo,Saulo Alberto do CarmoMorenz,Mirton José FrotaGomide,Carlos Augusto de MirandaMaurício,Rogério MartinsBraz,Thiago Gomes dos Santoseng2016-11-25T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
title |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
spellingShingle |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes Lopes,Clenardo Macedo Brachiaria decumbens morphogenesis shading silvopastoral system tiller density |
title_short |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
title_full |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
title_fullStr |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
title_full_unstemmed |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
title_sort |
Plant morphology and herbage accumulation of signal grass with or without fertilization, under different light regimes |
author |
Lopes,Clenardo Macedo |
author_facet |
Lopes,Clenardo Macedo Paciullo,Domingos Sávio Campos Araújo,Saulo Alberto do Carmo Morenz,Mirton José Frota Gomide,Carlos Augusto de Miranda Maurício,Rogério Martins Braz,Thiago Gomes dos Santos |
author_role |
author |
author2 |
Paciullo,Domingos Sávio Campos Araújo,Saulo Alberto do Carmo Morenz,Mirton José Frota Gomide,Carlos Augusto de Miranda Maurício,Rogério Martins Braz,Thiago Gomes dos Santos |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Lopes,Clenardo Macedo Paciullo,Domingos Sávio Campos Araújo,Saulo Alberto do Carmo Morenz,Mirton José Frota Gomide,Carlos Augusto de Miranda Maurício,Rogério Martins Braz,Thiago Gomes dos Santos |
dc.subject.por.fl_str_mv |
Brachiaria decumbens morphogenesis shading silvopastoral system tiller density |
topic |
Brachiaria decumbens morphogenesis shading silvopastoral system tiller density |
description |
ABSTRACT: The silvopastoral system has been suggested as an alternative to recover degraded pastures in tropical regions. However, trees reduce the light available for pastures, which may affect the growth and herbage accumulation. The objective of this study was to evaluate the morphogenesis, canopy structure and herbage accumulation of signalgrass ( Brachiaria decumbens ) subjected to three light regimes (0, 20 and 70% of natural shading) and two fertilization levels (presence or absence of nitrogen, phosphorus and potassium). Leaf and stem elongation rates increased under shading but did not vary with fertilization. The leaf appearance rate was greater under fertilizer treatment but was generally similar among light regimes. The tiller density was greater in full sun and lower in intense shading. Tiller density responded to fertilization under full sun and moderate shading. Herbage accumulation increased by 42% with fertilization under full sun, 12% under moderate shading and did not vary under intense shading. Results showed that even under fertilization the herbage accumulation was limited by reduced light. However, under moderate shade the fertilization was important to raise tiller population over the growth cycles. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 |
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=S0103-84782017000200403 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000200403 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20160472 |
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.47 n.2 2017 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_ |
1749140550901039104 |