Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth
Autor(a) principal: | |
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Data de Publicação: | 2011 |
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=S1516-35982011000900004 |
Resumo: | The objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg Ndm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 µmolm-2.s-1, at levels 0 and 600 mg Ndm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass. |
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Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowthchlorophyllCO2 concentrationPanicum maximumphotosynthesisThe objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg Ndm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 µmolm-2.s-1, at levels 0 and 600 mg Ndm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass.Sociedade Brasileira de Zootecnia2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900004Revista Brasileira de Zootecnia v.40 n.9 2011reponame:Revista Brasileira de Zootecnia (Online)instname:Sociedade Brasileira de Zootecnia (SBZ)instacron:SBZ10.1590/S1516-35982011000900004info:eu-repo/semantics/openAccessLopes,Marcos NevesLacerda,Claudivan Feitosa deCândido,Magno José DuartePompeu,Roberto Cláudio Fernandes FrancoSilva,Rodrigo Gregório daLopes,José Wellington BatistaFernandes,Francisco Ronaldo BelémBezerra,Francisco Marcus Limaeng2011-09-30T00:00:00Zoai:scielo:S1516-35982011000900004Revistahttps://www.rbz.org.br/pt-br/https://old.scielo.br/oai/scielo-oai.php||bz@sbz.org.br|| secretariarbz@sbz.org.br1806-92901516-3598opendoar:2011-09-30T00:00Revista Brasileira de Zootecnia (Online) - Sociedade Brasileira de Zootecnia (SBZ)false |
dc.title.none.fl_str_mv |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
title |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
spellingShingle |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth Lopes,Marcos Neves chlorophyll CO2 concentration Panicum maximum photosynthesis |
title_short |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
title_full |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
title_fullStr |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
title_full_unstemmed |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
title_sort |
Gas exchange in massai grass under five nitrogen fertilization levels during establishment and regrowth |
author |
Lopes,Marcos Neves |
author_facet |
Lopes,Marcos Neves Lacerda,Claudivan Feitosa de Cândido,Magno José Duarte Pompeu,Roberto Cláudio Fernandes Franco Silva,Rodrigo Gregório da Lopes,José Wellington Batista Fernandes,Francisco Ronaldo Belém Bezerra,Francisco Marcus Lima |
author_role |
author |
author2 |
Lacerda,Claudivan Feitosa de Cândido,Magno José Duarte Pompeu,Roberto Cláudio Fernandes Franco Silva,Rodrigo Gregório da Lopes,José Wellington Batista Fernandes,Francisco Ronaldo Belém Bezerra,Francisco Marcus Lima |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Lopes,Marcos Neves Lacerda,Claudivan Feitosa de Cândido,Magno José Duarte Pompeu,Roberto Cláudio Fernandes Franco Silva,Rodrigo Gregório da Lopes,José Wellington Batista Fernandes,Francisco Ronaldo Belém Bezerra,Francisco Marcus Lima |
dc.subject.por.fl_str_mv |
chlorophyll CO2 concentration Panicum maximum photosynthesis |
topic |
chlorophyll CO2 concentration Panicum maximum photosynthesis |
description |
The objective of this study was to evaluate gas exchange in the massai grass during establishment and regrowth cycles in a greenhouse, using five nitrogen (N) fertilization levels. A completely randomized split-plot design of five nitrogen levels (0; 150; 300; 450 and 600 mg Ndm-3 of soil) was employed with the N levels as plots, and the cycles (establishment, regrowth 1 and 2) as subplots, evaluated with five replicates. We evaluated leaf transpiration (E), leaf temperature (TFOL), leaf photosynthesis rate (A), leaf carbon dioxide concentration (Ci), stomatal conductance (gs), photosynthesis/transpiration ratio (A/E), photosynthesis/conductance ratio (A/gs), chlorophyll relative index (CRI), and nitrogen sufficiency index (NSI). Growth cycles influenced all physiological characteristics, except for NSI. N fertilization levels affected TFOL, A, CRI and NSI variables, whereas for gs, E, Ci, A/E and A/gs it did not occur. A increased from 6.38 to 10.33 µmolm-2.s-1, at levels 0 and 600 mg Ndm-3 of soil, respectively. Gas exchange in the massai grass was favored by nitrogen fertilization, since the cycles amended these characteristics of the grass. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-09-01 |
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=S1516-35982011000900004 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900004 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-35982011000900004 |
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.40 n.9 2011 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_ |
1750318148290084864 |