Yield components and morphogenesis of Aruana grass in response to nitrogen supply
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Scientia Agrícola (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600011 |
Resumo: | Areas with Aruana grass (Panicum maximum Jacq.) in Brazilian pastures, especially those used by sheep, have expanded due to yield and morphological characteristics of this grass that are favorable to these animals. Nevertheless, the knowledge concerning yield attributes of this grass in relation to nitrogen fertilization is very limited. The objective of this research was to evaluate yield and physiological attributes in this forage grass when grown in nutrient solutions containing N rates. The experiment was carried out in a greenhouse with plastic pots containing ground quartz as substrate, during the Spring season. Six N rates in the solution (14, 112, 210, 294, 378, and 462 mg L-1), with 70% N-NO3- and 30% N-NH4+ were tested. Experimental units were set up in a completely randomized block design, with four replications. Plants were harvested at 35 days after the seedlings were transplanted to the pots and again at 28 days after the first harvest. After the second harvest, the roots were taken from the substrate. In both growing periods, dry matter yield for plant tops and roots, leaf area, number of expanded green leaves, number of tillers, leaf appearance rate, and phyllochron were significantly affected by the N rates, and the data were adjusted to a second-order model. Aruana grass required high rates of N to show maximum response in those variables. |
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Yield components and morphogenesis of Aruana grass in response to nitrogen supplyPanicum maximumleaf areaphyllochronleavestilleringAreas with Aruana grass (Panicum maximum Jacq.) in Brazilian pastures, especially those used by sheep, have expanded due to yield and morphological characteristics of this grass that are favorable to these animals. Nevertheless, the knowledge concerning yield attributes of this grass in relation to nitrogen fertilization is very limited. The objective of this research was to evaluate yield and physiological attributes in this forage grass when grown in nutrient solutions containing N rates. The experiment was carried out in a greenhouse with plastic pots containing ground quartz as substrate, during the Spring season. Six N rates in the solution (14, 112, 210, 294, 378, and 462 mg L-1), with 70% N-NO3- and 30% N-NH4+ were tested. Experimental units were set up in a completely randomized block design, with four replications. Plants were harvested at 35 days after the seedlings were transplanted to the pots and again at 28 days after the first harvest. After the second harvest, the roots were taken from the substrate. In both growing periods, dry matter yield for plant tops and roots, leaf area, number of expanded green leaves, number of tillers, leaf appearance rate, and phyllochron were significantly affected by the N rates, and the data were adjusted to a second-order model. Aruana grass required high rates of N to show maximum response in those variables.Escola Superior de Agricultura "Luiz de Queiroz"2004-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600011Scientia Agricola v.61 n.6 2004reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90162004000600011info:eu-repo/semantics/openAccessLavres Jr.,JoséFerragine,Maria Del CarmenGerdes,LucianaRaposo,Roberto Wagner CavalcantiCosta,Michelle Nazaré Xavier daMonteiro,Francisco Antonioeng2005-02-16T00:00:00Zoai:scielo:S0103-90162004000600011Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:2005-02-16T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
title |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
spellingShingle |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply Lavres Jr.,José Panicum maximum leaf area phyllochron leaves tillering |
title_short |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
title_full |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
title_fullStr |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
title_full_unstemmed |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
title_sort |
Yield components and morphogenesis of Aruana grass in response to nitrogen supply |
author |
Lavres Jr.,José |
author_facet |
Lavres Jr.,José Ferragine,Maria Del Carmen Gerdes,Luciana Raposo,Roberto Wagner Cavalcanti Costa,Michelle Nazaré Xavier da Monteiro,Francisco Antonio |
author_role |
author |
author2 |
Ferragine,Maria Del Carmen Gerdes,Luciana Raposo,Roberto Wagner Cavalcanti Costa,Michelle Nazaré Xavier da Monteiro,Francisco Antonio |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Lavres Jr.,José Ferragine,Maria Del Carmen Gerdes,Luciana Raposo,Roberto Wagner Cavalcanti Costa,Michelle Nazaré Xavier da Monteiro,Francisco Antonio |
dc.subject.por.fl_str_mv |
Panicum maximum leaf area phyllochron leaves tillering |
topic |
Panicum maximum leaf area phyllochron leaves tillering |
description |
Areas with Aruana grass (Panicum maximum Jacq.) in Brazilian pastures, especially those used by sheep, have expanded due to yield and morphological characteristics of this grass that are favorable to these animals. Nevertheless, the knowledge concerning yield attributes of this grass in relation to nitrogen fertilization is very limited. The objective of this research was to evaluate yield and physiological attributes in this forage grass when grown in nutrient solutions containing N rates. The experiment was carried out in a greenhouse with plastic pots containing ground quartz as substrate, during the Spring season. Six N rates in the solution (14, 112, 210, 294, 378, and 462 mg L-1), with 70% N-NO3- and 30% N-NH4+ were tested. Experimental units were set up in a completely randomized block design, with four replications. Plants were harvested at 35 days after the seedlings were transplanted to the pots and again at 28 days after the first harvest. After the second harvest, the roots were taken from the substrate. In both growing periods, dry matter yield for plant tops and roots, leaf area, number of expanded green leaves, number of tillers, leaf appearance rate, and phyllochron were significantly affected by the N rates, and the data were adjusted to a second-order model. Aruana grass required high rates of N to show maximum response in those variables. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-12-01 |
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=S0103-90162004000600011 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000600011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-90162004000600011 |
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 |
Escola Superior de Agricultura "Luiz de Queiroz" |
publisher.none.fl_str_mv |
Escola Superior de Agricultura "Luiz de Queiroz" |
dc.source.none.fl_str_mv |
Scientia Agricola v.61 n.6 2004 reponame:Scientia Agrícola (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Scientia Agrícola (Online) |
collection |
Scientia Agrícola (Online) |
repository.name.fl_str_mv |
Scientia Agrícola (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
scientia@usp.br||alleoni@usp.br |
_version_ |
1748936459641946112 |