Padrões de desfolha do milheto pastejado por bezerras de corte

Detalhes bibliográficos
Autor(a) principal: Monfardini, Liana
Data de Publicação: 2021
Tipo de documento: Dissertação
Idioma: por
Título da fonte: Manancial - Repositório Digital da UFSM
Texto Completo: http://repositorio.ufsm.br/handle/1/23609
Resumo: The work was carried out aiming to evaluate intensity, frequency of defoliation and millet (Pennisetum americanum (L.) Leeke) characteristics grazed by beef heifers in two phenological stages. The continuous stocking rate grazing method was used with a variable number of animals to keep the canopy height between 30 and 40 cm. The experimental design used was completely randomized with two phenological stages (vegetative and pre-reproductive) with eight replications of area. The total number of leaves was 21.8% higher in vegetative stage, while population density of basal (116.0 tillers/m²) and axillary tillers (101.4 tillers/m²) were similar phenological stages. Average of defoliation intensity was 47,0% and general defoliation frequency was 0,51 defoliation/tillers/day. Each heifer grazed an area of 395.3 m²/day. Leaf blades were grazed 4.7 times before entering in senescence and the termical accumulation observed between defoliation intervals was sufficient for 1.2 new leaves to be emitted before next defoliation event. Intensity and frequency of defoliation of expanded and expanding leaves were similar, showing that the heifers maintained grazing strategy during analyzed stages.
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spelling Padrões de desfolha do milheto pastejado por bezerras de corteDefoliation patterns of pearl millet grazed by beff heifersEstádio fenológicoFrequência de desfolhaIntensidade de desfolhaMorfogênesePennisetum americanumFrequency of defoliationIntensity of defoliationMorphogenesisPhenological stageCNPQ::CIENCIAS AGRARIAS::ZOOTECNIAThe work was carried out aiming to evaluate intensity, frequency of defoliation and millet (Pennisetum americanum (L.) Leeke) characteristics grazed by beef heifers in two phenological stages. The continuous stocking rate grazing method was used with a variable number of animals to keep the canopy height between 30 and 40 cm. The experimental design used was completely randomized with two phenological stages (vegetative and pre-reproductive) with eight replications of area. The total number of leaves was 21.8% higher in vegetative stage, while population density of basal (116.0 tillers/m²) and axillary tillers (101.4 tillers/m²) were similar phenological stages. Average of defoliation intensity was 47,0% and general defoliation frequency was 0,51 defoliation/tillers/day. Each heifer grazed an area of 395.3 m²/day. Leaf blades were grazed 4.7 times before entering in senescence and the termical accumulation observed between defoliation intervals was sufficient for 1.2 new leaves to be emitted before next defoliation event. Intensity and frequency of defoliation of expanded and expanding leaves were similar, showing that the heifers maintained grazing strategy during analyzed stages.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESO trabalho foi realizado com o objetivo de avaliar a intensidade, frequência de desfolha e as características estruturais do milheto (Pennisetum americanum (L.) Leeke) pastejado por bezerras de corte em dois estádios fenológicos dessa forrageira. Foi utilizado o método de pastejo com lotação contínua, com número variável de animais para manter a altura do dossel entre 30 e 40 cm. O delineamento experimental utilizado foi o inteiramente casualizado, com dois estádios fenológicos, vegetativo e pré-reprodutivo, com oito repetições de área. O número total de folhas foi 21,8% maior no estádio vegetativo. A densidade populacional de perfilhos basais (116,0 perfilhos/m²) e axilares (101,4 perfilhos/m²) foi semelhante nos estádios fenológicos. A intensidade de desfolha média foi de 47,0% e a frequência geral de desfolha foi de 0,51 desfolhação/perfilho/dia. Cada bezerra pastejou uma área de 395,3 m²/dia. As lâminas foliares foram pastejadas 4,7 vezes durante a duração da vida das folhas e o acúmulo térmico observado entre os intervalos de desfolha, foi suficiente para que 1,2 folha fosse emitida antes do próximo evento de desfolha. As bezerras mantiveram estratégia de pastejo similar durante os estádios avaliados com semelhante intensidade e frequência de desfolha nas folhas expandidas e em expansão.Universidade Federal de Santa MariaBrasilZootecniaUFSMPrograma de Pós-Graduação em ZootecniaCentro de Ciências RuraisPötter, Lucianahttp://lattes.cnpq.br/0683474086643296Quadros, Fernando Luiz Ferreira deMachado, Juliana MedianeiraMonfardini, Liana2022-01-26T13:21:59Z2022-01-26T13:21:59Z2021-03-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://repositorio.ufsm.br/handle/1/23609porAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessreponame:Manancial - Repositório Digital da UFSMinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM2022-01-26T13:22:59Zoai:repositorio.ufsm.br:1/23609Biblioteca Digital de Teses e Dissertaçõeshttps://repositorio.ufsm.br/ONGhttps://repositorio.ufsm.br/oai/requestatendimento.sib@ufsm.br||tedebc@gmail.comopendoar:2022-01-26T13:22:59Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)false
dc.title.none.fl_str_mv Padrões de desfolha do milheto pastejado por bezerras de corte
Defoliation patterns of pearl millet grazed by beff heifers
title Padrões de desfolha do milheto pastejado por bezerras de corte
spellingShingle Padrões de desfolha do milheto pastejado por bezerras de corte
Monfardini, Liana
Estádio fenológico
Frequência de desfolha
Intensidade de desfolha
Morfogênese
Pennisetum americanum
Frequency of defoliation
Intensity of defoliation
Morphogenesis
Phenological stage
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
title_short Padrões de desfolha do milheto pastejado por bezerras de corte
title_full Padrões de desfolha do milheto pastejado por bezerras de corte
title_fullStr Padrões de desfolha do milheto pastejado por bezerras de corte
title_full_unstemmed Padrões de desfolha do milheto pastejado por bezerras de corte
title_sort Padrões de desfolha do milheto pastejado por bezerras de corte
author Monfardini, Liana
author_facet Monfardini, Liana
author_role author
dc.contributor.none.fl_str_mv Pötter, Luciana
http://lattes.cnpq.br/0683474086643296
Quadros, Fernando Luiz Ferreira de
Machado, Juliana Medianeira
dc.contributor.author.fl_str_mv Monfardini, Liana
dc.subject.por.fl_str_mv Estádio fenológico
Frequência de desfolha
Intensidade de desfolha
Morfogênese
Pennisetum americanum
Frequency of defoliation
Intensity of defoliation
Morphogenesis
Phenological stage
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
topic Estádio fenológico
Frequência de desfolha
Intensidade de desfolha
Morfogênese
Pennisetum americanum
Frequency of defoliation
Intensity of defoliation
Morphogenesis
Phenological stage
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA
description The work was carried out aiming to evaluate intensity, frequency of defoliation and millet (Pennisetum americanum (L.) Leeke) characteristics grazed by beef heifers in two phenological stages. The continuous stocking rate grazing method was used with a variable number of animals to keep the canopy height between 30 and 40 cm. The experimental design used was completely randomized with two phenological stages (vegetative and pre-reproductive) with eight replications of area. The total number of leaves was 21.8% higher in vegetative stage, while population density of basal (116.0 tillers/m²) and axillary tillers (101.4 tillers/m²) were similar phenological stages. Average of defoliation intensity was 47,0% and general defoliation frequency was 0,51 defoliation/tillers/day. Each heifer grazed an area of 395.3 m²/day. Leaf blades were grazed 4.7 times before entering in senescence and the termical accumulation observed between defoliation intervals was sufficient for 1.2 new leaves to be emitted before next defoliation event. Intensity and frequency of defoliation of expanded and expanding leaves were similar, showing that the heifers maintained grazing strategy during analyzed stages.
publishDate 2021
dc.date.none.fl_str_mv 2021-03-30
2022-01-26T13:21:59Z
2022-01-26T13:21:59Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://repositorio.ufsm.br/handle/1/23609
url http://repositorio.ufsm.br/handle/1/23609
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution-NonCommercial-NoDerivatives 4.0 International
http://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Federal de Santa Maria
Brasil
Zootecnia
UFSM
Programa de Pós-Graduação em Zootecnia
Centro de Ciências Rurais
publisher.none.fl_str_mv Universidade Federal de Santa Maria
Brasil
Zootecnia
UFSM
Programa de Pós-Graduação em Zootecnia
Centro de Ciências Rurais
dc.source.none.fl_str_mv reponame:Manancial - Repositório Digital da UFSM
instname:Universidade Federal de Santa Maria (UFSM)
instacron:UFSM
instname_str Universidade Federal de Santa Maria (UFSM)
instacron_str UFSM
institution UFSM
reponame_str Manancial - Repositório Digital da UFSM
collection Manancial - Repositório Digital da UFSM
repository.name.fl_str_mv Manancial - Repositório Digital da UFSM - Universidade Federal de Santa Maria (UFSM)
repository.mail.fl_str_mv atendimento.sib@ufsm.br||tedebc@gmail.com
_version_ 1805922178203385856

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