Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/28267 |
Resumo: | Amylases and essential oils are additives of dairy cows that improve fermentation and ruminal health in dairy cows The objectives of this study were to evaluate the response of dairy cows to supplementation with an exogenous amylase in a basal diet containing monensin (MON) varying in ruminal acidogenic capacity, and to evaluate the substitution of monensin by a blend of essential oils (EO, Crina Ruminants, DSM) in a diet containing AM Thirty Holstein cows (207 ± 100 DIM) were individually fed a standard TMR for two weeks. At the end of the standardization period, cows were blocked based on parity and milk yield and were randomly allocated to one of three treatments in eight weeks of comparison period. Treatments were MON (M 15 mg/kg of DM), MON plus AMY (MA, 15 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM), and EO plus amylase (EA, 50 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM). Two diets were fed in sequence during the comparison period. A diet containing rehydrated and ensiled finely ground mature corn and finely ground mature corn was fed during weeks one to four (REC) and another diet formulated only with finely ground mature corn was fed during weeks five to eight (FGC). For all variables, two contrasts were tested: M vs. MA and MA vs. EA. Milk production and dry matter intake were not different between treatments. The substitution to MON by EO reduced milk fat yield (1.208 vs. 1.109 kg/d). Did not affect MUN in cows fed MA compared with M in REC diets (18.1 vs. 18.2 mg/dL), but decreased in FGC diets (20.3 vs. 22.6 mg/dL). The amylase supplementation tended to increased feed efficiency Milk/DMI and ECM/DMI when associated to M (1.59 vs. 1.55 and 1.59 vs. 1.51), however, the supplementation of amylase associated to EO decreased compared to MA (1.54 vs. 1.59 and 1.48 vs. 1.59). The treatment EA increased the proportion of butyrate in reticular fluid compared with MA (10.3 vs. 9.6 % of total VFA). When MA was fed in REC diets it did not affect rumen pH compared with M alone (6.53 vs. 6.49), and decreased in FGC diets (6.57 vs. 7.09).The amylase tended to increase the proportion of daily intake in the morning and to reduce the proportion of daily intake in the afternoon. Cows fed EA reduced chewing by 55 min/d compared with MA. The Addition of amylase increased feed efficiency in dairy cows only when fed with MON, the EO eliminated the positive effect of amylase. |
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Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oilsBovinos de leite - Alimentação e raçõesAmilasesÓleo essencialDairy cattle - Feeding and feedsAmylasesEssential oilNutrição e Alimentação AnimalAmylases and essential oils are additives of dairy cows that improve fermentation and ruminal health in dairy cows The objectives of this study were to evaluate the response of dairy cows to supplementation with an exogenous amylase in a basal diet containing monensin (MON) varying in ruminal acidogenic capacity, and to evaluate the substitution of monensin by a blend of essential oils (EO, Crina Ruminants, DSM) in a diet containing AM Thirty Holstein cows (207 ± 100 DIM) were individually fed a standard TMR for two weeks. At the end of the standardization period, cows were blocked based on parity and milk yield and were randomly allocated to one of three treatments in eight weeks of comparison period. Treatments were MON (M 15 mg/kg of DM), MON plus AMY (MA, 15 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM), and EO plus amylase (EA, 50 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM). Two diets were fed in sequence during the comparison period. A diet containing rehydrated and ensiled finely ground mature corn and finely ground mature corn was fed during weeks one to four (REC) and another diet formulated only with finely ground mature corn was fed during weeks five to eight (FGC). For all variables, two contrasts were tested: M vs. MA and MA vs. EA. Milk production and dry matter intake were not different between treatments. The substitution to MON by EO reduced milk fat yield (1.208 vs. 1.109 kg/d). Did not affect MUN in cows fed MA compared with M in REC diets (18.1 vs. 18.2 mg/dL), but decreased in FGC diets (20.3 vs. 22.6 mg/dL). The amylase supplementation tended to increased feed efficiency Milk/DMI and ECM/DMI when associated to M (1.59 vs. 1.55 and 1.59 vs. 1.51), however, the supplementation of amylase associated to EO decreased compared to MA (1.54 vs. 1.59 and 1.48 vs. 1.59). The treatment EA increased the proportion of butyrate in reticular fluid compared with MA (10.3 vs. 9.6 % of total VFA). When MA was fed in REC diets it did not affect rumen pH compared with M alone (6.53 vs. 6.49), and decreased in FGC diets (6.57 vs. 7.09).The amylase tended to increase the proportion of daily intake in the morning and to reduce the proportion of daily intake in the afternoon. Cows fed EA reduced chewing by 55 min/d compared with MA. The Addition of amylase increased feed efficiency in dairy cows only when fed with MON, the EO eliminated the positive effect of amylase.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Amilase e Óleos Essenciais são aditivos para vacas leiteiras que aumentam a fermentação e a saúde ruminal nesses animais. Os objetivos com essa pesquisa foi avaliar a resposta de vacas leiteiras à suplementação com uma amilase exógena em uma dieta basal contendo monensina e avaliar a substituição de monensina por uma mistura de óleos essenciais em dieta contendo amilase exógena. Utilizou-se 30 vacas da raça Holandês (DEL 207± 100 d). As vacas receberam uma dieta de padronização durante 14 dias. Ao final desse período foram blocadas de acoodo com a paridade e produção de leite e foram alocadas aleatoriamente em três tratamentos por um período de comparação de 56 dias em um desenho experimental de casualizado ajustado à covariável com medidas repetidas ao longo do tempo. Os tratamentos foram: monensina(M, 15 mg/kg of DM), monensina + amilase exógena (MA, 15 mg monensina/kg de MS + Ronozyme RumiStar®, 375 KNU/kg de MS) e óleos essenciais + amilase (EA, Crina®, 50 mg/kg de MS, uma mistura composta por Timol, guaiacol, eugenol, vanillina, e Limoneno + Ronozyme RumiStar®, 375 KNU/kg de MS). O período de comparação foi dividido em dois com 28 dias cada. No primeiro a dieta continha milho moído reidratado e ensilado (REC) e no segundo foi substituído por milho maduro moído fino (FGC) O efeito fixo da dieta e a interação do tratamento e da dieta foram analisados como medidas repetidas ao longo do tempo com dados obtidos nas semanas 4 e 8, representando dietas REC e FGC, respectivamente e para todas as variáveis foram testados dois contrastes: M vs MA e MA vc EA. Produção de leite e CMS não foram diferentes entre os tratamentos. A substiruição de M por OE reduziu a secreção de gordura em 99.5 g/d (P = 0.04). A suplementação com amilase tendeu aumentar as duas medidas de eficiência alimentar (Leite/CMS e LeiteE/CMS) quando associado a M. Amilase tendeu reduzir NUL (P = 0.06) e também tendeu a diminuir a proporção de Butirato no AGV total no líquido ruminal. O tratamento MA aumentou em 3,1% a ingestão diária de MS no período da manhã quando comparada com o M (P = 0.08), e diminuiu 4,2% no período da tarde (P=0.07), os animais desse tratamento tiveram maior preferência por dietas com tamanho de partícula (>19 mm). No tratamento EA, a taxa de mastigação foi 55 minutos por dia a menos que no MA. A adicão de amilase em dietas contend M aumenta a eficiência alimentar em vacas leiteiras mas a substituição de monensina por óleos essenciais elimina o efeito positivo da amilase.Universidade Federal de LavrasPrograma de Pós-Graduação em ZootecniaUFLAbrasilDepartamento de ZootecniaPereira, Marcos NevesPereira, Renata Apocalypse NogueiraÁvila, Carla Luiza da SilvaDuarte, Douglas Vinícius Lage2017-12-15T11:32:22Z2017-12-15T11:32:22Z2017-12-152017-03-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfDUARTE, D. V. L. Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils. 2017. 106 p. Dissertação (Mestrado em Zootecnia)-Universidade Federal de Lavras, Lavras, 2017.http://repositorio.ufla.br/jspui/handle/1/28267porinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLA2021-12-07T15:25:44Zoai:localhost:1/28267Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2021-12-07T15:25:44Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
title |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
spellingShingle |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils Duarte, Douglas Vinícius Lage Bovinos de leite - Alimentação e rações Amilases Óleo essencial Dairy cattle - Feeding and feeds Amylases Essential oil Nutrição e Alimentação Animal |
title_short |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
title_full |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
title_fullStr |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
title_full_unstemmed |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
title_sort |
Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils |
author |
Duarte, Douglas Vinícius Lage |
author_facet |
Duarte, Douglas Vinícius Lage |
author_role |
author |
dc.contributor.none.fl_str_mv |
Pereira, Marcos Neves Pereira, Renata Apocalypse Nogueira Ávila, Carla Luiza da Silva |
dc.contributor.author.fl_str_mv |
Duarte, Douglas Vinícius Lage |
dc.subject.por.fl_str_mv |
Bovinos de leite - Alimentação e rações Amilases Óleo essencial Dairy cattle - Feeding and feeds Amylases Essential oil Nutrição e Alimentação Animal |
topic |
Bovinos de leite - Alimentação e rações Amilases Óleo essencial Dairy cattle - Feeding and feeds Amylases Essential oil Nutrição e Alimentação Animal |
description |
Amylases and essential oils are additives of dairy cows that improve fermentation and ruminal health in dairy cows The objectives of this study were to evaluate the response of dairy cows to supplementation with an exogenous amylase in a basal diet containing monensin (MON) varying in ruminal acidogenic capacity, and to evaluate the substitution of monensin by a blend of essential oils (EO, Crina Ruminants, DSM) in a diet containing AM Thirty Holstein cows (207 ± 100 DIM) were individually fed a standard TMR for two weeks. At the end of the standardization period, cows were blocked based on parity and milk yield and were randomly allocated to one of three treatments in eight weeks of comparison period. Treatments were MON (M 15 mg/kg of DM), MON plus AMY (MA, 15 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM), and EO plus amylase (EA, 50 mg/kg of DM plus Ronozyme RumiStar, 375 KNU/kg of DM). Two diets were fed in sequence during the comparison period. A diet containing rehydrated and ensiled finely ground mature corn and finely ground mature corn was fed during weeks one to four (REC) and another diet formulated only with finely ground mature corn was fed during weeks five to eight (FGC). For all variables, two contrasts were tested: M vs. MA and MA vs. EA. Milk production and dry matter intake were not different between treatments. The substitution to MON by EO reduced milk fat yield (1.208 vs. 1.109 kg/d). Did not affect MUN in cows fed MA compared with M in REC diets (18.1 vs. 18.2 mg/dL), but decreased in FGC diets (20.3 vs. 22.6 mg/dL). The amylase supplementation tended to increased feed efficiency Milk/DMI and ECM/DMI when associated to M (1.59 vs. 1.55 and 1.59 vs. 1.51), however, the supplementation of amylase associated to EO decreased compared to MA (1.54 vs. 1.59 and 1.48 vs. 1.59). The treatment EA increased the proportion of butyrate in reticular fluid compared with MA (10.3 vs. 9.6 % of total VFA). When MA was fed in REC diets it did not affect rumen pH compared with M alone (6.53 vs. 6.49), and decreased in FGC diets (6.57 vs. 7.09).The amylase tended to increase the proportion of daily intake in the morning and to reduce the proportion of daily intake in the afternoon. Cows fed EA reduced chewing by 55 min/d compared with MA. The Addition of amylase increased feed efficiency in dairy cows only when fed with MON, the EO eliminated the positive effect of amylase. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-12-15T11:32:22Z 2017-12-15T11:32:22Z 2017-12-15 2017-03-28 |
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 |
DUARTE, D. V. L. Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils. 2017. 106 p. Dissertação (Mestrado em Zootecnia)-Universidade Federal de Lavras, Lavras, 2017. http://repositorio.ufla.br/jspui/handle/1/28267 |
identifier_str_mv |
DUARTE, D. V. L. Feed efficiency of dairy cows fed amylase with monensin or a blend of essential oils. 2017. 106 p. Dissertação (Mestrado em Zootecnia)-Universidade Federal de Lavras, Lavras, 2017. |
url |
http://repositorio.ufla.br/jspui/handle/1/28267 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Lavras Programa de Pós-Graduação em Zootecnia UFLA brasil Departamento de Zootecnia |
publisher.none.fl_str_mv |
Universidade Federal de Lavras Programa de Pós-Graduação em Zootecnia UFLA brasil Departamento de Zootecnia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFLA instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Repositório Institucional da UFLA |
collection |
Repositório Institucional da UFLA |
repository.name.fl_str_mv |
Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
nivaldo@ufla.br || repositorio.biblioteca@ufla.br |
_version_ |
1807835204813848576 |