Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle

Detalhes bibliográficos
Autor(a) principal: Fonseca, Dilermando Miranda da
Data de Publicação: 2013
Outros Autores: Santos, Manoel Eduardo Rozalino, Silveira, Márcia Cristina Teixeira, Gomes, Virgilio Mesquita, Sousa, Braulio Maia de Lana, Santos, Anselmo de Deus
Tipo de documento: Artigo
Idioma: eng
Título da fonte: LOCUS Repositório Institucional da UFV
Texto Completo: http://dx.doi.org/10.4025/actascianimsci.v35i4.20421
http://www.locus.ufv.br/handle/123456789/25272
Resumo: Current experiment identified the height of signal grass {Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk [syn. Brachiaria decumbens Stapf cv. Basilisk]} at the beginning of deferment that provided an appropriate pasture structure and potential selectivity by cattle on deferred pastures. Four pasture heights at the beginning of deferment (10, 20, 30 and 40 cm) and two forage samples (available on pasture and simulated grazing) were studied. The experimental design was set in completely randomized blocks, with two replications, in a split-plot arrangement. Higher percentage of live leaf blades and lower percentage of live stems and senescent forage were recorded in the forage sample from simulated grazing. The increase in pasture height increased the percentage of senescent forage and reduced the percentage of live leaf blades in forage samples. Pasture height at the beginning of deferment did not affect the potential selectivity index by cattle for the percentage of live leaf blade. The potential selectivity index varied quadratically for the percentage of live stems and increased linearly for the percentage of senescent forage with pasture height. A 10-to-20 cm reduction in pasture height at the beginning of deferment improved the structure of deferred signal grass and optimized selectivity by cattle.
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spelling Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattleBrachiaria decumbensStemLeafSenescent forageGrazingBrachiaria decumbensColmoFolhaForragem senescentePastejoCurrent experiment identified the height of signal grass {Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk [syn. Brachiaria decumbens Stapf cv. Basilisk]} at the beginning of deferment that provided an appropriate pasture structure and potential selectivity by cattle on deferred pastures. Four pasture heights at the beginning of deferment (10, 20, 30 and 40 cm) and two forage samples (available on pasture and simulated grazing) were studied. The experimental design was set in completely randomized blocks, with two replications, in a split-plot arrangement. Higher percentage of live leaf blades and lower percentage of live stems and senescent forage were recorded in the forage sample from simulated grazing. The increase in pasture height increased the percentage of senescent forage and reduced the percentage of live leaf blades in forage samples. Pasture height at the beginning of deferment did not affect the potential selectivity index by cattle for the percentage of live leaf blade. The potential selectivity index varied quadratically for the percentage of live stems and increased linearly for the percentage of senescent forage with pasture height. A 10-to-20 cm reduction in pasture height at the beginning of deferment improved the structure of deferred signal grass and optimized selectivity by cattle.Objetivou-se identificar a altura do capim-braquiarinha {Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk [syn. Brachiaria decumbens Stapf cv. Basilisk]} no início do diferimento que possibilite adequada estrutura de pasto e seletividade potencial dos bovinos em pastagens diferidas. Foram estudadas quatro alturas do pasto no início do diferimento (10, 20, 30 e 40 cm) e duas amostras de forragem (disponível na pastagem e de pastejo simulado). O delineamento experimental foi em blocos completos casualizado com duas repetições, em esquema de parcela subdividida. Foi registrada maior porcentagem de lâmina foliar viva e menor de colmo vivo e forragem senescente na amostra de forragem em pastejo simulado. O incremento na altura do pasto aumentou o porcentual de forragem senescente e reduziu a porcentagem de lâmina foliar viva nas amostras de forragem. A altura do pasto no início do diferimento não influenciou o índice de seletividade potencial de bovinos para a porcentagem de lâmina foliar viva. O índice de seletividade potencial variou quadraticamente para a porcentagem de colmo vivo e aumentou linearmente para a porcentagem de forragem senescente com a altura do pasto. A redução da altura do pasto para 10 a 20 cm no início do diferimento melhora a estrutura do capim-braquiária diferido e otimiza a seletividade dos bovinos.Acta Scientiarum. Animal Sciences2019-05-20T23:47:02Z2019-05-20T23:47:02Z2013-10info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlepdfapplication/pdf18078672http://dx.doi.org/10.4025/actascianimsci.v35i4.20421http://www.locus.ufv.br/handle/123456789/25272engv. 35, n. 04, p. 379- 385, oct./ dec. 2013Fonseca, Dilermando Miranda daSantos, Manoel Eduardo RozalinoSilveira, Márcia Cristina TeixeiraGomes, Virgilio MesquitaSousa, Braulio Maia de LanaSantos, Anselmo de Deusinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFV2024-07-12T07:00:23Zoai:locus.ufv.br:123456789/25272Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452024-07-12T07:00:23LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.none.fl_str_mv Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
title Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
spellingShingle Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
Fonseca, Dilermando Miranda da
Brachiaria decumbens
Stem
Leaf
Senescent forage
Grazing
Brachiaria decumbens
Colmo
Folha
Forragem senescente
Pastejo
title_short Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
title_full Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
title_fullStr Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
title_full_unstemmed Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
title_sort Pasture height at the beginning of deferment as a determinant of signal grass structure and potential selectivity by cattle
author Fonseca, Dilermando Miranda da
author_facet Fonseca, Dilermando Miranda da
Santos, Manoel Eduardo Rozalino
Silveira, Márcia Cristina Teixeira
Gomes, Virgilio Mesquita
Sousa, Braulio Maia de Lana
Santos, Anselmo de Deus
author_role author
author2 Santos, Manoel Eduardo Rozalino
Silveira, Márcia Cristina Teixeira
Gomes, Virgilio Mesquita
Sousa, Braulio Maia de Lana
Santos, Anselmo de Deus
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Fonseca, Dilermando Miranda da
Santos, Manoel Eduardo Rozalino
Silveira, Márcia Cristina Teixeira
Gomes, Virgilio Mesquita
Sousa, Braulio Maia de Lana
Santos, Anselmo de Deus
dc.subject.por.fl_str_mv Brachiaria decumbens
Stem
Leaf
Senescent forage
Grazing
Brachiaria decumbens
Colmo
Folha
Forragem senescente
Pastejo
topic Brachiaria decumbens
Stem
Leaf
Senescent forage
Grazing
Brachiaria decumbens
Colmo
Folha
Forragem senescente
Pastejo
description Current experiment identified the height of signal grass {Urochloa decumbens (Stapf) R. D. Webster cv. Basilisk [syn. Brachiaria decumbens Stapf cv. Basilisk]} at the beginning of deferment that provided an appropriate pasture structure and potential selectivity by cattle on deferred pastures. Four pasture heights at the beginning of deferment (10, 20, 30 and 40 cm) and two forage samples (available on pasture and simulated grazing) were studied. The experimental design was set in completely randomized blocks, with two replications, in a split-plot arrangement. Higher percentage of live leaf blades and lower percentage of live stems and senescent forage were recorded in the forage sample from simulated grazing. The increase in pasture height increased the percentage of senescent forage and reduced the percentage of live leaf blades in forage samples. Pasture height at the beginning of deferment did not affect the potential selectivity index by cattle for the percentage of live leaf blade. The potential selectivity index varied quadratically for the percentage of live stems and increased linearly for the percentage of senescent forage with pasture height. A 10-to-20 cm reduction in pasture height at the beginning of deferment improved the structure of deferred signal grass and optimized selectivity by cattle.
publishDate 2013
dc.date.none.fl_str_mv 2013-10
2019-05-20T23:47:02Z
2019-05-20T23:47:02Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv 18078672
http://dx.doi.org/10.4025/actascianimsci.v35i4.20421
http://www.locus.ufv.br/handle/123456789/25272
identifier_str_mv 18078672
url http://dx.doi.org/10.4025/actascianimsci.v35i4.20421
http://www.locus.ufv.br/handle/123456789/25272
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv v. 35, n. 04, p. 379- 385, oct./ dec. 2013
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv pdf
application/pdf
dc.publisher.none.fl_str_mv Acta Scientiarum. Animal Sciences
publisher.none.fl_str_mv Acta Scientiarum. Animal Sciences
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
instname:Universidade Federal de Viçosa (UFV)
instacron:UFV
instname_str Universidade Federal de Viçosa (UFV)
instacron_str UFV
institution UFV
reponame_str LOCUS Repositório Institucional da UFV
collection LOCUS Repositório Institucional da UFV
repository.name.fl_str_mv LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)
repository.mail.fl_str_mv fabiojreis@ufv.br
_version_ 1817559890069028864

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