Forage productivity and morphogenesis of Axonopus aureus under defoliation levels

Detalhes bibliográficos
Autor(a) principal: Costa, Newton de Lucena
Data de Publicação: 2022
Outros Autores: Magalhães, João Avelar, Rodrigues, Braz Henrique Nunes, Santos, Francisco José de Seixas
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Research, Society and Development
Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/31866
Resumo: The effect of defoliation levels (5, 10, 15, 20, 25 and 30 cm above soil level) on dry matter (DM) yield and morphogenetic and structural characteristics of Axonopus aureus was evaluated under field conditions in Roraima´s savannas. The effects of defoliation levels on the DM yields, absolute growth rate, number of leaves/plant, medium blade length, leaf area, leaf appearance and elongation rates were quadratics and maximum values recorded with cutting at 19.2; 17.5; 20.7; 27.2; 24.3; 20.5 e 25.9 cm above soil level. The population tiller density was directly proportional to the level of defoliation, while the opposite occurred for to leaf senescence rate. Apical meristem removing percentage was higher with increasing defoliation level. Aftermath regrowth showed close negative correlation with defoliation level. Pastures of A. aureus managed under residues between 15 and 25 cm above the ground provide greater productivity and efficiency of forage use, greater tissue renewal and a more favorable canopy structure for grazing.
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spelling Forage productivity and morphogenesis of Axonopus aureus under defoliation levelsProductividad de forraje y morfogénesis de Axonopus aureus bajo niveles de defoliaciónProdutividade de forragem e morfogênese de Axonopus aureus sob níveis de desfolhaçãoLeavesDry matterTillerSenescence.HojasMateria secaMacollaSenescencia. FolhasMatéria secaPerfilhamentoSenescência.The effect of defoliation levels (5, 10, 15, 20, 25 and 30 cm above soil level) on dry matter (DM) yield and morphogenetic and structural characteristics of Axonopus aureus was evaluated under field conditions in Roraima´s savannas. The effects of defoliation levels on the DM yields, absolute growth rate, number of leaves/plant, medium blade length, leaf area, leaf appearance and elongation rates were quadratics and maximum values recorded with cutting at 19.2; 17.5; 20.7; 27.2; 24.3; 20.5 e 25.9 cm above soil level. The population tiller density was directly proportional to the level of defoliation, while the opposite occurred for to leaf senescence rate. Apical meristem removing percentage was higher with increasing defoliation level. Aftermath regrowth showed close negative correlation with defoliation level. Pastures of A. aureus managed under residues between 15 and 25 cm above the ground provide greater productivity and efficiency of forage use, greater tissue renewal and a more favorable canopy structure for grazing.Se evaluó el efecto de los niveles de defoliación (5, 10, 15, 20, 25 y 30 cm sobre el suelo) sobre la producción de forraje y las características morfogénicas y estructurales de Axonopus aureus en condiciones naturales en la sabanas de Roraima. Los efectos de los niveles de defoliación sobre la producción de materia seca, tasa absoluta de crecimiento, número de hojas macollas-1, tamaño promedio de hoja, área foliar y tasas de aparición y expansión de hojas fueron cuadráticos y los valores máximos se registraron con cortes a 19,2; 17,5; 20,7; 27,2; 24,3; 20,5 y 25,9 cm sobre el suelo, respectivamente. La densidad de población de macollas fue directamente proporcional al nivel de defoliación, ocurriendo lo contrario con respecto a la tasa de senescencia de las hojas. La eliminación de meristemos apicales se incrementó con el aumento del nivel de defoliación. El vigor de rebrote se correlacionó directa y negativamente con el nivel de defoliación. Las pasturas de A. aureus manejadas bajo residuos entre 15 y 25 cm sobre el suelo proporciona mayor productividad y eficiencia en el uso del forraje, mayor renovación de tejidos y una estructura de dosel más favorable para el pastoreo.O efeito de níveis de desfolhação (5, 10, 15, 20, 25 e 30 cm acima do solo) sobre a produção de forragem e características morfogênicas e estruturais de Axonopus aureus foi avaliado sob condições naturais nos cerrados de Roraima. Os efeitos dos níveis de desfolhação sobre a produção de matéria seca, taxa absoluta de crescimento, número de folhas/perfilho, tamanho médio de folhas, área foliar e taxas de aparecimento e expansão de folhas foram quadráticos e os máximos valores registrados com cortes a 19,2; 17,5; 20,7; 27,2; 24,3; 20,5 e 25,9 cm acima do solo, respectivamente. A densidade populacional de perfilhos foi diretamente proporcional ao nível de desfolhação, ocorrendo o inverso quanto à taxa de senescência foliar. A eliminação de meristemas apicais foi incrementada com o aumento do nível de desfolhação. O vigor de rebrota foi direta e negativamente correlacionado com o nível de desfolhação. Pastagens de A. aureus manejadas sob resíduos entre 15 e 25 cm acima do solo proporcionam maior produtividade e eficiência de utilização da forragem, maior renovação de tecidos e estrutura do dossel mais favorável ao pastejo.Research, Society and Development2022-07-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://rsdjournal.org/index.php/rsd/article/view/3186610.33448/rsd-v11i9.31866Research, Society and Development; Vol. 11 No. 9; e21511931866Research, Society and Development; Vol. 11 Núm. 9; e21511931866Research, Society and Development; v. 11 n. 9; e215119318662525-3409reponame:Research, Society and Developmentinstname:Universidade Federal de Itajubá (UNIFEI)instacron:UNIFEIenghttps://rsdjournal.org/index.php/rsd/article/view/31866/27069Copyright (c) 2022 Newton de Lucena Costa; João Avelar Magalhães; Braz Henrique Nunes Rodrigues; Francisco José de Seixas Santoshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessCosta, Newton de LucenaMagalhães, João Avelar Rodrigues, Braz Henrique Nunes Santos, Francisco José de Seixas 2022-07-21T12:36:16Zoai:ojs.pkp.sfu.ca:article/31866Revistahttps://rsdjournal.org/index.php/rsd/indexPUBhttps://rsdjournal.org/index.php/rsd/oairsd.articles@gmail.com2525-34092525-3409opendoar:2024-01-17T09:48:03.654427Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)false
dc.title.none.fl_str_mv Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
Productividad de forraje y morfogénesis de Axonopus aureus bajo niveles de defoliación
Produtividade de forragem e morfogênese de Axonopus aureus sob níveis de desfolhação
title Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
spellingShingle Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
Costa, Newton de Lucena
Leaves
Dry matter
Tiller
Senescence.
Hojas
Materia seca
Macolla
Senescencia.
Folhas
Matéria seca
Perfilhamento
Senescência.
title_short Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
title_full Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
title_fullStr Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
title_full_unstemmed Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
title_sort Forage productivity and morphogenesis of Axonopus aureus under defoliation levels
author Costa, Newton de Lucena
author_facet Costa, Newton de Lucena
Magalhães, João Avelar
Rodrigues, Braz Henrique Nunes
Santos, Francisco José de Seixas
author_role author
author2 Magalhães, João Avelar
Rodrigues, Braz Henrique Nunes
Santos, Francisco José de Seixas
author2_role author
author
author
dc.contributor.author.fl_str_mv Costa, Newton de Lucena
Magalhães, João Avelar
Rodrigues, Braz Henrique Nunes
Santos, Francisco José de Seixas
dc.subject.por.fl_str_mv Leaves
Dry matter
Tiller
Senescence.
Hojas
Materia seca
Macolla
Senescencia.
Folhas
Matéria seca
Perfilhamento
Senescência.
topic Leaves
Dry matter
Tiller
Senescence.
Hojas
Materia seca
Macolla
Senescencia.
Folhas
Matéria seca
Perfilhamento
Senescência.
description The effect of defoliation levels (5, 10, 15, 20, 25 and 30 cm above soil level) on dry matter (DM) yield and morphogenetic and structural characteristics of Axonopus aureus was evaluated under field conditions in Roraima´s savannas. The effects of defoliation levels on the DM yields, absolute growth rate, number of leaves/plant, medium blade length, leaf area, leaf appearance and elongation rates were quadratics and maximum values recorded with cutting at 19.2; 17.5; 20.7; 27.2; 24.3; 20.5 e 25.9 cm above soil level. The population tiller density was directly proportional to the level of defoliation, while the opposite occurred for to leaf senescence rate. Apical meristem removing percentage was higher with increasing defoliation level. Aftermath regrowth showed close negative correlation with defoliation level. Pastures of A. aureus managed under residues between 15 and 25 cm above the ground provide greater productivity and efficiency of forage use, greater tissue renewal and a more favorable canopy structure for grazing.
publishDate 2022
dc.date.none.fl_str_mv 2022-07-07
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/31866
10.33448/rsd-v11i9.31866
url https://rsdjournal.org/index.php/rsd/article/view/31866
identifier_str_mv 10.33448/rsd-v11i9.31866
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://rsdjournal.org/index.php/rsd/article/view/31866/27069
dc.rights.driver.fl_str_mv https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Research, Society and Development
publisher.none.fl_str_mv Research, Society and Development
dc.source.none.fl_str_mv Research, Society and Development; Vol. 11 No. 9; e21511931866
Research, Society and Development; Vol. 11 Núm. 9; e21511931866
Research, Society and Development; v. 11 n. 9; e21511931866
2525-3409
reponame:Research, Society and Development
instname:Universidade Federal de Itajubá (UNIFEI)
instacron:UNIFEI
instname_str Universidade Federal de Itajubá (UNIFEI)
instacron_str UNIFEI
institution UNIFEI
reponame_str Research, Society and Development
collection Research, Society and Development
repository.name.fl_str_mv Research, Society and Development - Universidade Federal de Itajubá (UNIFEI)
repository.mail.fl_str_mv rsd.articles@gmail.com
_version_ 1797052768646594560

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