Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical

Detalhes bibliográficos
Ano de defesa: 2011
Autor(a) principal: Rufino, Luana Marta de Almeida
Orientador(a): Detmann, Edenio lattes
Banca de defesa: Queiroz, Augusto César de lattes, Valadares, Rilene Ferreira Diniz lattes
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Viçosa
Programa de Pós-Graduação: Mestrado em Zootecnia
Departamento: Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
País: BR
Palavras-chave em Português:
Palavras-chave em Inglês:
Área do conhecimento CNPq:
Link de acesso: http://locus.ufv.br/handle/123456789/5702
Resumo: The objective of this work was to evaluate the effects of supplementation with nitrogenous compounds in the rumen and, or in the abomasum on intake, digestibility, rumen dynamics of fibrous compounds and on the parameters of nitrogenous compounds metabolism in cattle fed tropical forage. The experiment was carried out from June 2010 to February 2011. Four Nellore young bulls, averaging 227±11 kg body weight (BW) and fitted with rumen and abomasums canullaes, were used. The following treatments were evaluated: control (only forage), ruminal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the rumen), abomasal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the abomasum), and ruminal and abomasal nitrogenous compounds supplementation (daily supply of 230 g of protein, being 115 g in the rumen and 115 g in the abomasum). The basal diet consisted of Tifton 85 (Cynodon spp) hay, which presented average crude protein (CP) content of 78.4 g/kg of dry matter (DM). The experiment was implemented and analyzed according to a 4 x 4 Latin square design, balanced for residual effects, with four treatments, four animals and four experimental periods lasting 29 days each. The experimental periods consisted of three phases or sub-periods. At first one, it was evaluated the animal response in terms of intake without supplementation. In the second sub-period it was assessed the intensity of animal response in terms of changes in intake according to supplementation. In the third sub-period, it was supposed that animals were under a steady state with regard intake, digestibility and metabolism according to the treatments. From this assumption, it was evaluated the digestibility, the rumen dynamics of fibrous compounds, and the characteristic of the rumen and metabolism of nitrogenous compounds. There was no effect of the treatments (P>0.10) on voluntary intake of DM and neutral detergent fiber (NDF) during the first two experimental sub-periods. During the third sub-period, there was no effects of treatments (P>0.10) on forage or NDF intake. The CP intake was increased by supplementation (P<0.10) despite of supplementation site. The total digestibility coefficient of CP was increased (P<0.10) when supplement was supplied compared to control treatment, but no differences (P>0.10) among supplementation sites were detected. The ruminal digestibility of CP was higher (P<0.10) with ruminal supplementation compared to the control and ruminal/abomasal supplementation. These latter treatments propitiated higher estimates (P<0.10) of rumen digestibility of CP compared to abomasal supplementation. It must be emphasize that the ruminal digestibility coefficient of CP was positive for ruminal supplementation and negative for the other treatments. All treatments differed (P<0.10) with regard the intestinal digestibility of CP; being in decreasing order: abomasal supplementation, ruminal/abomasal supplementation, ruminal supplementation and control. There was effect of treatments (P<0.10) on the mass of CP digested in the intestine (IDP). The higher IDP was observed for abomasal supplementation compared with ruminal/abomasal supplementation and treatment control; the ruminal supplementation taken an intermediate position in the multiple comparison profile. The intestinal flow of microbial nitrogenous compounds and microbial efficiency did not differ among treatments (P>0.10). There was no effect (P>0.10) of treatments on the ruminal degradation and passage of NDF. Higher concentrations of rumen ammonia nitrogen (RAN; P<0.10) were observed for ruminal supplementation compared to the control and abomasal supplementation, which did not differ (P>0.10) each other. Ruminal/abomasal supplementation caused intermediate RAN concentrations. The concentration of serum urea nitrogen (SUN) was higher (P<0.10) for ruminal supplementation compared to ruminal/abomasal supplementation, which in turn was higher than the control (P<0.10). The average concentration of SUN obtained with abomasal supplementation was intermediary to the other supplementation forms and did not differ from both (P>0.10). The apparent nitrogenous compounds balance (NB) was increased (P<0.10) with the supply of supplement when compared to control treatment, regardless of the supplementation site. There were no differences (P>0.10) among treatments with regard to efficiency of nitrogen utilization. However, supplementation increased on average by 350% the efficient of use of absorbed nitrogen. The control treatment had higher (P<0.10) urinary excretion of 3-methyl histidine compared to treatments involving supplementation, which did not differ (P>0.10) each other. The supplementation of cattle fed tropical forage with nitrogenous compounds in the rumen and, or post-rumen causes similar increases in the retention and the efficiency of utilization of nitrogenous compounds. However, the metabolic mechanisms involved in the efficiency improvement seem to be different. These mechanisms are probably based on the increment of the ruminal pool of ammonia with the ruminal supplementation and in the increase of the mass of protein digested in the small intestine for the post-ruminal supplementation.
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spelling Rufino, Luana Marta de Almeidahttp://lattes.cnpq.br/9699627833479097Paulino, Mário Fonsecahttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787752E3Valadares Filho, Sebastião de Camposhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787028J6Detmann, Edeniohttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760013T1Queiroz, Augusto César dehttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783006P5Valadares, Rilene Ferreira Dinizhttp://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787025E42015-03-26T13:55:05Z2012-07-162015-03-26T13:55:05Z2011-07-26RUFINO, Luana Marta de Almeida. Ruminal and/or abomasal nitrogenous supplementation in cattle fed tropical forage. 2011. 57 f. Dissertação (Mestrado em Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul) - Universidade Federal de Viçosa, Viçosa, 2011.http://locus.ufv.br/handle/123456789/5702The objective of this work was to evaluate the effects of supplementation with nitrogenous compounds in the rumen and, or in the abomasum on intake, digestibility, rumen dynamics of fibrous compounds and on the parameters of nitrogenous compounds metabolism in cattle fed tropical forage. The experiment was carried out from June 2010 to February 2011. Four Nellore young bulls, averaging 227±11 kg body weight (BW) and fitted with rumen and abomasums canullaes, were used. The following treatments were evaluated: control (only forage), ruminal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the rumen), abomasal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the abomasum), and ruminal and abomasal nitrogenous compounds supplementation (daily supply of 230 g of protein, being 115 g in the rumen and 115 g in the abomasum). The basal diet consisted of Tifton 85 (Cynodon spp) hay, which presented average crude protein (CP) content of 78.4 g/kg of dry matter (DM). The experiment was implemented and analyzed according to a 4 x 4 Latin square design, balanced for residual effects, with four treatments, four animals and four experimental periods lasting 29 days each. The experimental periods consisted of three phases or sub-periods. At first one, it was evaluated the animal response in terms of intake without supplementation. In the second sub-period it was assessed the intensity of animal response in terms of changes in intake according to supplementation. In the third sub-period, it was supposed that animals were under a steady state with regard intake, digestibility and metabolism according to the treatments. From this assumption, it was evaluated the digestibility, the rumen dynamics of fibrous compounds, and the characteristic of the rumen and metabolism of nitrogenous compounds. There was no effect of the treatments (P>0.10) on voluntary intake of DM and neutral detergent fiber (NDF) during the first two experimental sub-periods. During the third sub-period, there was no effects of treatments (P>0.10) on forage or NDF intake. The CP intake was increased by supplementation (P<0.10) despite of supplementation site. The total digestibility coefficient of CP was increased (P<0.10) when supplement was supplied compared to control treatment, but no differences (P>0.10) among supplementation sites were detected. The ruminal digestibility of CP was higher (P<0.10) with ruminal supplementation compared to the control and ruminal/abomasal supplementation. These latter treatments propitiated higher estimates (P<0.10) of rumen digestibility of CP compared to abomasal supplementation. It must be emphasize that the ruminal digestibility coefficient of CP was positive for ruminal supplementation and negative for the other treatments. All treatments differed (P<0.10) with regard the intestinal digestibility of CP; being in decreasing order: abomasal supplementation, ruminal/abomasal supplementation, ruminal supplementation and control. There was effect of treatments (P<0.10) on the mass of CP digested in the intestine (IDP). The higher IDP was observed for abomasal supplementation compared with ruminal/abomasal supplementation and treatment control; the ruminal supplementation taken an intermediate position in the multiple comparison profile. The intestinal flow of microbial nitrogenous compounds and microbial efficiency did not differ among treatments (P>0.10). There was no effect (P>0.10) of treatments on the ruminal degradation and passage of NDF. Higher concentrations of rumen ammonia nitrogen (RAN; P<0.10) were observed for ruminal supplementation compared to the control and abomasal supplementation, which did not differ (P>0.10) each other. Ruminal/abomasal supplementation caused intermediate RAN concentrations. The concentration of serum urea nitrogen (SUN) was higher (P<0.10) for ruminal supplementation compared to ruminal/abomasal supplementation, which in turn was higher than the control (P<0.10). The average concentration of SUN obtained with abomasal supplementation was intermediary to the other supplementation forms and did not differ from both (P>0.10). The apparent nitrogenous compounds balance (NB) was increased (P<0.10) with the supply of supplement when compared to control treatment, regardless of the supplementation site. There were no differences (P>0.10) among treatments with regard to efficiency of nitrogen utilization. However, supplementation increased on average by 350% the efficient of use of absorbed nitrogen. The control treatment had higher (P<0.10) urinary excretion of 3-methyl histidine compared to treatments involving supplementation, which did not differ (P>0.10) each other. The supplementation of cattle fed tropical forage with nitrogenous compounds in the rumen and, or post-rumen causes similar increases in the retention and the efficiency of utilization of nitrogenous compounds. However, the metabolic mechanisms involved in the efficiency improvement seem to be different. These mechanisms are probably based on the increment of the ruminal pool of ammonia with the ruminal supplementation and in the increase of the mass of protein digested in the small intestine for the post-ruminal supplementation.Objetivou-se com este trabalho avaliar os efeitos da suplementação com compostos nitrogenados no rúmen e/ou no abomaso sobre o consumo, a digestiblidade, a dinâmica ruminal dos compostos fibrosos e os parâmetros do metabolismo dos compostos nitrogenados em bovinos alimentados com forragem tropical. O experimento foi conduzido entre os meses de junho de 2010 e fevereiro de 2011, sendo utilizados 4 novilhos Nelore, não castrados, com peso corporal médio (PC) de 227±11 kg, fistulados no rúmen e no abomaso. Foram avaliados os seguintes tratamentos: controle (somente forragem basal); suplementação nitrogenada ruminal (fornecimento diário de 230 g de proteína suplementar no rúmen); suplementação nitrogenada abomasal (fornecimento diário de 230 g de proteína suplementar no abomaso) e suplementação nitrogenada ruminal e abomasal (fornecimento diário de 230 g de proteína suplementar, sendo 115 g no rúmen e 115 g no abomaso). A alimentação volumosa basal foi constituída por feno de tifton 85 (Cynodon spp), com nível de proteína bruta (PB) médio de 78,4 g/kg com base na matéria seca (MS). O experimento foi implementado e analisado, segundo delineamento em quadrado latino 4 x 4 balanceado para efeitos residuais, com quatro tratamentos, quatro animais e quatro períodos experimentais com 29 dias cada. Os períodos experimentais constaram de três fases ou subperíodos. No primeiro, avaliou-se a resposta animal em termos de consumo sem suplementação. No segundo subperíodo foi avaliada a intensidade de resposta animal em termos de evolução do consumo em resposta à suplementação. Na terceira fase de cada período, pressupondo-se que os animais estivessem apresentando respostas estáveis à suplementação, procedeu-se às avaliações relativas aos coeficientes de digestibilidade, à dinâmica ruminal dos compostos fibrosos e ao metabolismo dos compostos nitrogenados. Não foram observados efeitos (P>0,10) de tratamentos sobre os consumos voluntários de MS e de fibra em detergente neutro (FDN) durante os dois primeiros subperíodos experimentais. Na avaliação do consumo durante a fase pressuposta com resposta estável à suplementação, não foram verificadas diferenças (P>0,10) entre tratamentos sobre o consumo de forragem e de FDN. Contudo, o consumo de PB foi incrementado com o fornecimento de suplemento (P<0,10), não diferindo entre os locais de suplementação. O coeficiente de digestibilidade total da PB foi ampliado (P<0,10) pela suplementação em relação ao controle, não havendo diferenças (P>0,10) entre os locais de suplementação. O coeficiente de digestibilidade ruminal da PB foi superior (P<0,10) com a suplementação ruminal em comparação ao controle e à suplementação ruminal/abomasal, os quais, por sua vez, propiciaram maiores estimativas (P<0,10) em comparação à suplementação exclusivamente abomasal. Ressalta-se que o coeficiente de digestibilidade ruminal da PB foi positivo para a suplementação ruminal e negativo para os demais tratamentos. Todos os tratamentos diferiram entre si (P<0,10) quanto ao coeficiente de digestibilidade intestinal da PB, sendo, em ordem decrescente: suplementação abomasal, suplementação ruminal/abomasal, suplementação ruminal e controle. Houve efeito de tratamentos (P<0,10) sobre a massa de PB digerida no intestino (PDI), sendo que maior PDI foi verificada para a suplementação abomasal em comparação com a suplementação ruminal/abomasal e o tratamento controle, o tratamento envolvendo suplementação ruminal situou-se em posição intermediária entre esses. O fluxo intestinal de compostos nitrogenados microbianos e a eficiência de síntese microbiana não diferiram entre os tratamentos (P>0,10). Não houve efeito (P>0,10) dos tratamentos sobre as taxas de degradação e passagem ruminal da FDN. Maiores concentrações de nitrogênio amoniacal ruminal (NAR; P<0,10) foram verificadas para a suplementação ruminal em comparação ao controle e à suplementação abomasal, que não difeririam entre si (P>0,10). A suplementação ruminal/abomasal propiciou concentração de NAR intermediária no perfil de comparações múltiplas. A concentração de nitrogênio uréico no soro (NUS) foi superior (P<0,10) com a suplementação ruminal em comparação à suplementação ruminal/abomasal, a qual, por sua vez, foi superior em relação ao controle (P<0,10). A concentração média de NUS obtida com a suplementação abomasal posicionou-se de forma intermediária aos demais esquemas de suplementação, não diferindo de ambos (P>0,10). O balanço aparente de compostos nitrogenados (BN) foi incrementado (P<0,10) com o fornecimento de suplementação nitrogenada em relação ao tratamento controle, independente do local de fornecimento do suplemento. Não foram verificadas diferenças (P>0,10) entre tratamentos quanto à eficiência de utilização do nitrogênio. No entanto, a suplementação elevou, em média, em 350% a eficiência de utilização do nitrogênio absorvido. O tratamento controle apresentou maior (P<0,10) excreção urinária de 3-metil histidina em relação aos tratamentos com suplementação, os quais não diferiram entre si (P>0,10). A suplementação de bovinos alimentados com forragem tropical com compostos nitrogenados no rúmen e/ou no pós-rúmen eleva de forma similar a retenção e a eficiência de utilização dos compostos nitrogenados. Contudo, os mecanismos metabólicos envolvidos na melhoria da eficiência são diferentes, sendo baseados na ampliação do pool de nitrogênio amoniacal no rúmen para a suplementação ruminal e na ampliação da massa de proteína digerida no intestino delgado para a suplementação pós-ruminal.Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorapplication/pdfporUniversidade Federal de ViçosaMestrado em ZootecniaUFVBRGenética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e ForragiculCompostos nitrogenadosSuplementaçãoBalanço de nitrogênioNitrogen compoundsSupplementationNitrogen balanceCNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMALSuplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropicalRuminal and/or abomasal nitrogenous supplementation in cattle fed tropical forageinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisinfo:eu-repo/semantics/openAccessreponame:LOCUS Repositório Institucional da UFVinstname:Universidade Federal de Viçosa (UFV)instacron:UFVORIGINALtexto completo.pdfapplication/pdf510014https://locus.ufv.br//bitstream/123456789/5702/1/texto%20completo.pdf394e02c0bed9c23bdf5f5573618e077fMD51TEXTtexto completo.pdf.txttexto completo.pdf.txtExtracted texttext/plain100189https://locus.ufv.br//bitstream/123456789/5702/2/texto%20completo.pdf.txt1c3560f5bfdb57e2d65d5ddd0a735fd2MD52THUMBNAILtexto completo.pdf.jpgtexto completo.pdf.jpgIM Thumbnailimage/jpeg3629https://locus.ufv.br//bitstream/123456789/5702/3/texto%20completo.pdf.jpge0af1f3673a5a066f029a2e59eebad10MD53123456789/57022016-04-10 23:14:44.637oai:locus.ufv.br:123456789/5702Repositório InstitucionalPUBhttps://www.locus.ufv.br/oai/requestfabiojreis@ufv.bropendoar:21452016-04-11T02:14:44LOCUS Repositório Institucional da UFV - Universidade Federal de Viçosa (UFV)false
dc.title.por.fl_str_mv Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
dc.title.alternative.eng.fl_str_mv Ruminal and/or abomasal nitrogenous supplementation in cattle fed tropical forage
title Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
spellingShingle Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
Rufino, Luana Marta de Almeida
Compostos nitrogenados
Suplementação
Balanço de nitrogênio
Nitrogen compounds
Supplementation
Nitrogen balance
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
title_short Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
title_full Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
title_fullStr Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
title_full_unstemmed Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
title_sort Suplementação nitrogenada ruminal e/ou abomasal em bovinos alimentados com forragem tropical
author Rufino, Luana Marta de Almeida
author_facet Rufino, Luana Marta de Almeida
author_role author
dc.contributor.authorLattes.por.fl_str_mv http://lattes.cnpq.br/9699627833479097
dc.contributor.author.fl_str_mv Rufino, Luana Marta de Almeida
dc.contributor.advisor-co1.fl_str_mv Paulino, Mário Fonseca
dc.contributor.advisor-co1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787752E3
dc.contributor.advisor-co2.fl_str_mv Valadares Filho, Sebastião de Campos
dc.contributor.advisor-co2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787028J6
dc.contributor.advisor1.fl_str_mv Detmann, Edenio
dc.contributor.advisor1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4760013T1
dc.contributor.referee1.fl_str_mv Queiroz, Augusto César de
dc.contributor.referee1Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783006P5
dc.contributor.referee2.fl_str_mv Valadares, Rilene Ferreira Diniz
dc.contributor.referee2Lattes.fl_str_mv http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787025E4
contributor_str_mv Paulino, Mário Fonseca
Valadares Filho, Sebastião de Campos
Detmann, Edenio
Queiroz, Augusto César de
Valadares, Rilene Ferreira Diniz
dc.subject.por.fl_str_mv Compostos nitrogenados
Suplementação
Balanço de nitrogênio
topic Compostos nitrogenados
Suplementação
Balanço de nitrogênio
Nitrogen compounds
Supplementation
Nitrogen balance
CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
dc.subject.eng.fl_str_mv Nitrogen compounds
Supplementation
Nitrogen balance
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL
description The objective of this work was to evaluate the effects of supplementation with nitrogenous compounds in the rumen and, or in the abomasum on intake, digestibility, rumen dynamics of fibrous compounds and on the parameters of nitrogenous compounds metabolism in cattle fed tropical forage. The experiment was carried out from June 2010 to February 2011. Four Nellore young bulls, averaging 227±11 kg body weight (BW) and fitted with rumen and abomasums canullaes, were used. The following treatments were evaluated: control (only forage), ruminal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the rumen), abomasal nitrogenous compounds supplementation (daily supply of 230 g of crude protein in the abomasum), and ruminal and abomasal nitrogenous compounds supplementation (daily supply of 230 g of protein, being 115 g in the rumen and 115 g in the abomasum). The basal diet consisted of Tifton 85 (Cynodon spp) hay, which presented average crude protein (CP) content of 78.4 g/kg of dry matter (DM). The experiment was implemented and analyzed according to a 4 x 4 Latin square design, balanced for residual effects, with four treatments, four animals and four experimental periods lasting 29 days each. The experimental periods consisted of three phases or sub-periods. At first one, it was evaluated the animal response in terms of intake without supplementation. In the second sub-period it was assessed the intensity of animal response in terms of changes in intake according to supplementation. In the third sub-period, it was supposed that animals were under a steady state with regard intake, digestibility and metabolism according to the treatments. From this assumption, it was evaluated the digestibility, the rumen dynamics of fibrous compounds, and the characteristic of the rumen and metabolism of nitrogenous compounds. There was no effect of the treatments (P>0.10) on voluntary intake of DM and neutral detergent fiber (NDF) during the first two experimental sub-periods. During the third sub-period, there was no effects of treatments (P>0.10) on forage or NDF intake. The CP intake was increased by supplementation (P<0.10) despite of supplementation site. The total digestibility coefficient of CP was increased (P<0.10) when supplement was supplied compared to control treatment, but no differences (P>0.10) among supplementation sites were detected. The ruminal digestibility of CP was higher (P<0.10) with ruminal supplementation compared to the control and ruminal/abomasal supplementation. These latter treatments propitiated higher estimates (P<0.10) of rumen digestibility of CP compared to abomasal supplementation. It must be emphasize that the ruminal digestibility coefficient of CP was positive for ruminal supplementation and negative for the other treatments. All treatments differed (P<0.10) with regard the intestinal digestibility of CP; being in decreasing order: abomasal supplementation, ruminal/abomasal supplementation, ruminal supplementation and control. There was effect of treatments (P<0.10) on the mass of CP digested in the intestine (IDP). The higher IDP was observed for abomasal supplementation compared with ruminal/abomasal supplementation and treatment control; the ruminal supplementation taken an intermediate position in the multiple comparison profile. The intestinal flow of microbial nitrogenous compounds and microbial efficiency did not differ among treatments (P>0.10). There was no effect (P>0.10) of treatments on the ruminal degradation and passage of NDF. Higher concentrations of rumen ammonia nitrogen (RAN; P<0.10) were observed for ruminal supplementation compared to the control and abomasal supplementation, which did not differ (P>0.10) each other. Ruminal/abomasal supplementation caused intermediate RAN concentrations. The concentration of serum urea nitrogen (SUN) was higher (P<0.10) for ruminal supplementation compared to ruminal/abomasal supplementation, which in turn was higher than the control (P<0.10). The average concentration of SUN obtained with abomasal supplementation was intermediary to the other supplementation forms and did not differ from both (P>0.10). The apparent nitrogenous compounds balance (NB) was increased (P<0.10) with the supply of supplement when compared to control treatment, regardless of the supplementation site. There were no differences (P>0.10) among treatments with regard to efficiency of nitrogen utilization. However, supplementation increased on average by 350% the efficient of use of absorbed nitrogen. The control treatment had higher (P<0.10) urinary excretion of 3-methyl histidine compared to treatments involving supplementation, which did not differ (P>0.10) each other. The supplementation of cattle fed tropical forage with nitrogenous compounds in the rumen and, or post-rumen causes similar increases in the retention and the efficiency of utilization of nitrogenous compounds. However, the metabolic mechanisms involved in the efficiency improvement seem to be different. These mechanisms are probably based on the increment of the ruminal pool of ammonia with the ruminal supplementation and in the increase of the mass of protein digested in the small intestine for the post-ruminal supplementation.
publishDate 2011
dc.date.issued.fl_str_mv 2011-07-26
dc.date.available.fl_str_mv 2012-07-16
2015-03-26T13:55:05Z
dc.date.accessioned.fl_str_mv 2015-03-26T13:55:05Z
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.citation.fl_str_mv RUFINO, Luana Marta de Almeida. Ruminal and/or abomasal nitrogenous supplementation in cattle fed tropical forage. 2011. 57 f. Dissertação (Mestrado em Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul) - Universidade Federal de Viçosa, Viçosa, 2011.
dc.identifier.uri.fl_str_mv http://locus.ufv.br/handle/123456789/5702
identifier_str_mv RUFINO, Luana Marta de Almeida. Ruminal and/or abomasal nitrogenous supplementation in cattle fed tropical forage. 2011. 57 f. Dissertação (Mestrado em Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul) - Universidade Federal de Viçosa, Viçosa, 2011.
url http://locus.ufv.br/handle/123456789/5702
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 Viçosa
dc.publisher.program.fl_str_mv Mestrado em Zootecnia
dc.publisher.initials.fl_str_mv UFV
dc.publisher.country.fl_str_mv BR
dc.publisher.department.fl_str_mv Genética e Melhoramento de Animais Domésticos; Nutrição e Alimentação Animal; Pastagens e Forragicul
publisher.none.fl_str_mv Universidade Federal de Viçosa
dc.source.none.fl_str_mv reponame:LOCUS Repositório Institucional da UFV
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