Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights

Detalhes bibliográficos
Autor(a) principal: Cardoso, Rebeca Rocha
Data de Publicação: 2019
Outros Autores: Sousa, Luciano Fernandes, Ferreira, Ana Cristina Holanda, Neiva, José Neuman Miranda, Ferreira, Deborah Alves, Silva, André Guimarães Maciel e, Nóbrega, Elcivan Bento da, Silva, Thais Valéria Souza
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/34060
Resumo: This study aimed to evaluate the morphogenic, structural, chemical characteristics, and forage yield of Massai grass, as well as the performance of sheep under three pre-grazing canopy heights. Eighteen Dorper x crossbred sheep (12 males and 6 females) were subjected to three pre-grazing canopy heights of Massai grass (45, 35, and 25 cm). Rotational grazing was adopted, with a fixed rest period of 12 days and occupation of four days. Before placing animals in the paddock, stocking rate was estimated to ensure a reduction of about 50% in the initial height. Morphogenic and chemical characteristics of forage were evaluated, as well as animal intake and performance. Pasture managed at 25 cm height induced reductions in stem and sheath sizes, and phyllochron but an increased leaf: stem ratio. However, the pasture cut at 35 cm above ground promoted an increase in total dry mass and foliar leaf productions, in addition to greater forage availability and daily accumulation. Yet, pastures with a height of 45 cm had a higher percentage of stem and senescent material, decreasing leaf intake by animals. Among the studied heights, 35 cm is the most suitable for Massai grass, when used for rearing sheep for meat production under pasture conditions in the northern Tocantins. This is because this management provided a greater availability of good quality forage and thereby increasing weight gains per area in animals.
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spelling Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heightsAvaliação de curto prazo da produção e características de forragem e desempenho de ovinos em capim Massai sob lotação rotativa com diferentes alturas pré-pastejoChemical compositionMegathyrsus maximusMorphogenesisPanicum maximumRuminants.BromatológicaMegathyrsus maximusMorfogênesePanicum maximumRuminantes.This study aimed to evaluate the morphogenic, structural, chemical characteristics, and forage yield of Massai grass, as well as the performance of sheep under three pre-grazing canopy heights. Eighteen Dorper x crossbred sheep (12 males and 6 females) were subjected to three pre-grazing canopy heights of Massai grass (45, 35, and 25 cm). Rotational grazing was adopted, with a fixed rest period of 12 days and occupation of four days. Before placing animals in the paddock, stocking rate was estimated to ensure a reduction of about 50% in the initial height. Morphogenic and chemical characteristics of forage were evaluated, as well as animal intake and performance. Pasture managed at 25 cm height induced reductions in stem and sheath sizes, and phyllochron but an increased leaf: stem ratio. However, the pasture cut at 35 cm above ground promoted an increase in total dry mass and foliar leaf productions, in addition to greater forage availability and daily accumulation. Yet, pastures with a height of 45 cm had a higher percentage of stem and senescent material, decreasing leaf intake by animals. Among the studied heights, 35 cm is the most suitable for Massai grass, when used for rearing sheep for meat production under pasture conditions in the northern Tocantins. This is because this management provided a greater availability of good quality forage and thereby increasing weight gains per area in animals.O objetivo foi avaliar as características morfogênicas, estruturais, bromatológicas e de produção do capim Massai, assim como o desempenho de ovinos sob três alturas pré-pastejo. Foram utilizados 18 ovinos (12 machos e seis fêmeas) mestiços Dorper x sem padrão racial definido (SPRD) pastejando em três alturas pré-pastejo em capim Massai, sendo as alturas de 45 cm, 35 cm e 25 cm. Foi adotado o método de lotação rotativa com período de descanso fixo de 12 dias e de ocupação de quatro dias. Antes da entrada dos animais no piquete foi estimada a lotação animal necessária para garantir a redução de aproximadamente 50% da altura inicial. Avaliou-se as características morfogênicas e a composição bromatológica da forragem e avaliou-se o consumo e desempenho dos animais. A altura de 25 cm reduziu o alongamento de colmo, o filocrono e o comprimento da bainha e apresentou maior relação folha:colmo, no entanto, o tratamento com 35 cm de altura pré-pastejo apresentou maior produção de massa seca total e de lâmina foliar, assim como maior oferta de forragem e taxa de acúmulo diária. Já o tratamento com 45 cm aumentou a porcentagem de colmo e de forragem morta acarretando uma menor apreensão de folhas pelos animais. Os maiores teores de proteína e nutrientes digestíveis totais foram observados no tratamento com 35 cm e no tratamento com 25 cm respectivamente. Com base nos resultados apresentados, a altura de 35 cm, entre as alturas de pré-pastejo avaliadas, é a mais indicada para o capim Massai utilizado na criação de ovinos de corte a pasto nas condições do norte do Tocantins, por apresentar maior disponibilidade de alimento, com uma boa qualidade da forrageira e possibilitar maior ganho de peso dos animais por área.UEL2019-05-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa de campoapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3406010.5433/1679-0359.2019v40n3p1339Semina: Ciências Agrárias; Vol. 40 No. 3 (2019); 1339-1356Semina: Ciências Agrárias; v. 40 n. 3 (2019); 1339-13561679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/34060/25431Copyright (c) 2019 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessCardoso, Rebeca RochaSousa, Luciano FernandesFerreira, Ana Cristina HolandaNeiva, José Neuman MirandaFerreira, Deborah AlvesSilva, André Guimarães Maciel eNóbrega, Elcivan Bento daSilva, Thais Valéria Souza2022-10-19T13:38:57Zoai:ojs.pkp.sfu.ca:article/34060Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-10-19T13:38:57Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
Avaliação de curto prazo da produção e características de forragem e desempenho de ovinos em capim Massai sob lotação rotativa com diferentes alturas pré-pastejo
title Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
spellingShingle Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
Cardoso, Rebeca Rocha
Chemical composition
Megathyrsus maximus
Morphogenesis
Panicum maximum
Ruminants.
Bromatológica
Megathyrsus maximus
Morfogênese
Panicum maximum
Ruminantes.
title_short Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
title_full Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
title_fullStr Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
title_full_unstemmed Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
title_sort Short-term evaluation of Massai grass forage yield and agronomic characteristics and sheep performance under rotational grazing with different pre-grazing canopy heights
author Cardoso, Rebeca Rocha
author_facet Cardoso, Rebeca Rocha
Sousa, Luciano Fernandes
Ferreira, Ana Cristina Holanda
Neiva, José Neuman Miranda
Ferreira, Deborah Alves
Silva, André Guimarães Maciel e
Nóbrega, Elcivan Bento da
Silva, Thais Valéria Souza
author_role author
author2 Sousa, Luciano Fernandes
Ferreira, Ana Cristina Holanda
Neiva, José Neuman Miranda
Ferreira, Deborah Alves
Silva, André Guimarães Maciel e
Nóbrega, Elcivan Bento da
Silva, Thais Valéria Souza
author2_role author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Cardoso, Rebeca Rocha
Sousa, Luciano Fernandes
Ferreira, Ana Cristina Holanda
Neiva, José Neuman Miranda
Ferreira, Deborah Alves
Silva, André Guimarães Maciel e
Nóbrega, Elcivan Bento da
Silva, Thais Valéria Souza
dc.subject.por.fl_str_mv Chemical composition
Megathyrsus maximus
Morphogenesis
Panicum maximum
Ruminants.
Bromatológica
Megathyrsus maximus
Morfogênese
Panicum maximum
Ruminantes.
topic Chemical composition
Megathyrsus maximus
Morphogenesis
Panicum maximum
Ruminants.
Bromatológica
Megathyrsus maximus
Morfogênese
Panicum maximum
Ruminantes.
description This study aimed to evaluate the morphogenic, structural, chemical characteristics, and forage yield of Massai grass, as well as the performance of sheep under three pre-grazing canopy heights. Eighteen Dorper x crossbred sheep (12 males and 6 females) were subjected to three pre-grazing canopy heights of Massai grass (45, 35, and 25 cm). Rotational grazing was adopted, with a fixed rest period of 12 days and occupation of four days. Before placing animals in the paddock, stocking rate was estimated to ensure a reduction of about 50% in the initial height. Morphogenic and chemical characteristics of forage were evaluated, as well as animal intake and performance. Pasture managed at 25 cm height induced reductions in stem and sheath sizes, and phyllochron but an increased leaf: stem ratio. However, the pasture cut at 35 cm above ground promoted an increase in total dry mass and foliar leaf productions, in addition to greater forage availability and daily accumulation. Yet, pastures with a height of 45 cm had a higher percentage of stem and senescent material, decreasing leaf intake by animals. Among the studied heights, 35 cm is the most suitable for Massai grass, when used for rearing sheep for meat production under pasture conditions in the northern Tocantins. This is because this management provided a greater availability of good quality forage and thereby increasing weight gains per area in animals.
publishDate 2019
dc.date.none.fl_str_mv 2019-05-21
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Pesquisa de campo
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/34060
10.5433/1679-0359.2019v40n3p1339
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/34060
identifier_str_mv 10.5433/1679-0359.2019v40n3p1339
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/34060/25431
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. 3 (2019); 1339-1356
Semina: Ciências Agrárias; v. 40 n. 3 (2019); 1339-1356
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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