Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing

Detalhes bibliográficos
Autor(a) principal: Negri, Renata
Data de Publicação: 2019
Outros Autores: Santos, Guilherme Batista dos, Macedo, Vicente de Paulo, Silveira, Magali Floriano da, Wlodarski, Leticia, Kluska, Sabrina
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Semina. Ciências Agrárias (Online)
Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/31390
Resumo: This study aimed to assess the morphogenic characteristics and tiller density of Aruana grass managed at different heights under sheep grazing. Aruana grass was managed at four mean heights (12, 15, 20, and 25 cm) distributed in a randomized block design with three replications, totaling 12 paddocks of 250 m² each. Twenty-four crossbred Dorper x Santa Inês lambs, with mean age and weight of 60 ± 15 days and 16.69 ± 2.70 kg, respectively, were randomly distributed in the treatments. Five tillers were demarcated per paddock for measuring morphogenic variables. A representative area in the paddock was used for counting the number of tillers. No differences (P > 0.05) were observed for leaf appearance rate, leaf elongation rate, stem elongation rate, leaf senescence rate, final leaf length, and leaf life span between the assessed heights. Phyllochron was longer at the height of 25 cm when compared to 15 and 20 cm (19.35, 12.11, and 12.75 days, respectively). The number of live leaves was higher at heights of 12, 15, and 20 cm when compared to 25 cm (3.99, 4.35, 4.15, and 2.86, respectively). The number of basal and aerial tillers presented no variation (P > 0.05) between canopy heights. Management heights from 15 to 20 cm allowed a higher number of live leaves and a shorter phyllochron in Aruana grass pastures managed for sheep. Canopy height management did not influence other morphogenic characteristics and tiller density.
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spelling Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazingMorfogênese e densidade de perfilhos do capim-Aruana manejado em diferentes alturas sob pastejo de ovinosLeaf appearanceLeaf life spanPhyllochronNumber of live leaves.Aparecimento foliarDuração de vida da folhaFilocronoNúmero de folha viva.This study aimed to assess the morphogenic characteristics and tiller density of Aruana grass managed at different heights under sheep grazing. Aruana grass was managed at four mean heights (12, 15, 20, and 25 cm) distributed in a randomized block design with three replications, totaling 12 paddocks of 250 m² each. Twenty-four crossbred Dorper x Santa Inês lambs, with mean age and weight of 60 ± 15 days and 16.69 ± 2.70 kg, respectively, were randomly distributed in the treatments. Five tillers were demarcated per paddock for measuring morphogenic variables. A representative area in the paddock was used for counting the number of tillers. No differences (P > 0.05) were observed for leaf appearance rate, leaf elongation rate, stem elongation rate, leaf senescence rate, final leaf length, and leaf life span between the assessed heights. Phyllochron was longer at the height of 25 cm when compared to 15 and 20 cm (19.35, 12.11, and 12.75 days, respectively). The number of live leaves was higher at heights of 12, 15, and 20 cm when compared to 25 cm (3.99, 4.35, 4.15, and 2.86, respectively). The number of basal and aerial tillers presented no variation (P > 0.05) between canopy heights. Management heights from 15 to 20 cm allowed a higher number of live leaves and a shorter phyllochron in Aruana grass pastures managed for sheep. Canopy height management did not influence other morphogenic characteristics and tiller density.O objetivo com o trabalho foi avaliar as características morfogênicas e a densidade de perfilhos do capim-Aruana manejado em diferentes alturas sob pastejo de ovinos. Em 12 piquetes de 250m² cada, o capim-Aruana foi manejado em quatro alturas médias (12, 15, 20 e 25 cm), distribuídas em um delineamento experimental de blocos casualizados, com três repetições para cada tratamento. Utilizou-se vinte e quatro borregas mestiças das raças Dorper x Santa Inês com idade e peso médio de 60 (± 15) dias e 16,69 (± 2,70) kg, respectivamente, distribuídas aleatoriamente nos tratamentos. Para mensuração das variáveis morfogênicas, foram demarcados cinco perfilhos por piquete. Para contagem do número de perfilhos, foi escolhida uma área representativa do piquete. Não foram observadas diferenças (P > 0,05) para a taxa de aparecimento foliar, taxa de alongamento foliar, taxa de alongamento do colmo, taxa de senescência foliar, comprimento final de folha inteira e duração de vida das folhas entre as alturas avaliadas. O filocrono foi maior na altura de 25 cm quando comparado às alturas de 15 e 20 cm (19,35, 12,11 e 12,75 dias, respectivamente). O número de folhas vivas foi superior nos tratamentos de 12, 15 e 20, quando comparados ao de 25 cm (3,99, 4,35, 4,15 e 2,86, respectivamente). O número de perfilhos basais e aéreos não variaram (P > 0,05) entre as alturas de dossel. Alturas de manejo entre 15 e 20 cm permitem maior número de folhas vivas e menor filocrono em pastagens de capim-Aruana manejada para ovinos. A altura de manejo do dossel não influenciou nas demais características morfogênicas e densidade de perfilhos.UEL2019-08-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3139010.5433/1679-0359.2019v40n5Supl1p2341Semina: Ciências Agrárias; Vol. 40 No. 5Supl1 (2019); 2341-2350Semina: Ciências Agrárias; v. 40 n. 5Supl1 (2019); 2341-23501679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/31390/25854Copyright (c) 2019 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessNegri, RenataSantos, Guilherme Batista dosMacedo, Vicente de PauloSilveira, Magali Floriano daWlodarski, LeticiaKluska, Sabrina2022-10-18T16:37:42Zoai:ojs.pkp.sfu.ca:article/31390Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-18T16:37:42Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
Morfogênese e densidade de perfilhos do capim-Aruana manejado em diferentes alturas sob pastejo de ovinos
title Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
spellingShingle Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
Negri, Renata
Leaf appearance
Leaf life span
Phyllochron
Number of live leaves.
Aparecimento foliar
Duração de vida da folha
Filocrono
Número de folha viva.
title_short Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
title_full Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
title_fullStr Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
title_full_unstemmed Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
title_sort Morphogenesis and tiller density of Aruana grass managed at different heights under sheep grazing
author Negri, Renata
author_facet Negri, Renata
Santos, Guilherme Batista dos
Macedo, Vicente de Paulo
Silveira, Magali Floriano da
Wlodarski, Leticia
Kluska, Sabrina
author_role author
author2 Santos, Guilherme Batista dos
Macedo, Vicente de Paulo
Silveira, Magali Floriano da
Wlodarski, Leticia
Kluska, Sabrina
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Negri, Renata
Santos, Guilherme Batista dos
Macedo, Vicente de Paulo
Silveira, Magali Floriano da
Wlodarski, Leticia
Kluska, Sabrina
dc.subject.por.fl_str_mv Leaf appearance
Leaf life span
Phyllochron
Number of live leaves.
Aparecimento foliar
Duração de vida da folha
Filocrono
Número de folha viva.
topic Leaf appearance
Leaf life span
Phyllochron
Number of live leaves.
Aparecimento foliar
Duração de vida da folha
Filocrono
Número de folha viva.
description This study aimed to assess the morphogenic characteristics and tiller density of Aruana grass managed at different heights under sheep grazing. Aruana grass was managed at four mean heights (12, 15, 20, and 25 cm) distributed in a randomized block design with three replications, totaling 12 paddocks of 250 m² each. Twenty-four crossbred Dorper x Santa Inês lambs, with mean age and weight of 60 ± 15 days and 16.69 ± 2.70 kg, respectively, were randomly distributed in the treatments. Five tillers were demarcated per paddock for measuring morphogenic variables. A representative area in the paddock was used for counting the number of tillers. No differences (P > 0.05) were observed for leaf appearance rate, leaf elongation rate, stem elongation rate, leaf senescence rate, final leaf length, and leaf life span between the assessed heights. Phyllochron was longer at the height of 25 cm when compared to 15 and 20 cm (19.35, 12.11, and 12.75 days, respectively). The number of live leaves was higher at heights of 12, 15, and 20 cm when compared to 25 cm (3.99, 4.35, 4.15, and 2.86, respectively). The number of basal and aerial tillers presented no variation (P > 0.05) between canopy heights. Management heights from 15 to 20 cm allowed a higher number of live leaves and a shorter phyllochron in Aruana grass pastures managed for sheep. Canopy height management did not influence other morphogenic characteristics and tiller density.
publishDate 2019
dc.date.none.fl_str_mv 2019-08-07
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://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/31390
10.5433/1679-0359.2019v40n5Supl1p2341
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/31390
identifier_str_mv 10.5433/1679-0359.2019v40n5Supl1p2341
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/31390/25854
dc.rights.driver.fl_str_mv Copyright (c) 2019 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2019 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv UEL
publisher.none.fl_str_mv UEL
dc.source.none.fl_str_mv Semina: Ciências Agrárias; Vol. 40 No. 5Supl1 (2019); 2341-2350
Semina: Ciências Agrárias; v. 40 n. 5Supl1 (2019); 2341-2350
1679-0359
1676-546X
reponame:Semina. Ciências Agrárias (Online)
instname:Universidade Estadual de Londrina (UEL)
instacron:UEL
instname_str Universidade Estadual de Londrina (UEL)
instacron_str UEL
institution UEL
reponame_str Semina. Ciências Agrárias (Online)
collection Semina. Ciências Agrárias (Online)
repository.name.fl_str_mv Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)
repository.mail.fl_str_mv semina.agrarias@uel.br
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