Orientador: Heraldo Cesar Gonçalves / Banca: Paulo Roberto de Lima Meireles / Banca: Renata Helena Branco Arnandes / Banca: Carlos Elysio Moreira da Fonseca / Banca: Francisco de Assis Fonseca de Macedo / Resumo: O objetivo deste trabalho foi avaliar a influência dos níveis de fibra em detergente neutro oriundo da forragem (FDNf) em dietas peletizadas, sobre o consumo e digestibilidade aparente da matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN) e carboidratos não fibrosos (CNF); e balanço de nitrogênio. Foram utilizadas cinco cabras fistuladas no rúmen dispostas em quadrado latino 5x5, sendo os níveis de FDNf de 15, 20, 25, 30 e 35% , as variáveis independentes. Os níveis de FDNf influenciaram de maneira quadrática os consumos de MS, PB, FDN e CNF expressos em % PV ou em unidade de peso metabólico (P<0,05). O maior consumo de MS foi encontrado no nível de 25,69% de FDNf e o valor médio de consumo de MS foi de 1,3% PV, inferior ao recomendado pelo NRC (1981) (1,46% PV), no entanto as exigências nutricionais foram atendidas em todas as dietas. Os coeficientes de digestibilidade aparente da MS, PB, e FDN foram influenciados de maneira quadrática pelos níveis de FDNf nas dietas, e foram maiores nos níveis de FDNf que apresentaram menor consumo de MS enquanto que o coeficiente de digestibilidade aparente dos CNF foi influenciado de maneira linear decrescente, diminuindo 0,66% para cada unidade de aumento dos níveis de FDNf nas dietas. Houve efeito quadrático dos níveis de FDNf nas dietas sobre o balanço de nitrogênio, o qual foi positivo em todos os níveis, mostrando eficiência das dietas quanto ao suprimento de proteína para os animais. / Abstract: The purpose of this study was to evaluate the influence of the levels of neutral detergent fiber from forage (fNDF) in pelleted diets on the intake and digestibility of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and on non-fibrous carbohydrates (NFC); and nitrogen balance. Five fistulated in the rumen goats were used, arranged in 5x5 Latin square, and the levels of fNDF 15, 20, 25, 30 and 35%, being the independent variables. Effect quadratic of the levels of fNDF on the intake of DM, CP, NDF and NFC expressed in % LW, or unit of metabolic weight (P<0,05). The higher consumption of DM was found in the level of 25.69% of fNDF and the average consumption of MS was 1.3% of LW, below that recommended by NRC (1981) (1.46% LW), however the nutritional requirements were met in all diets. The coefficients of apparent digestibility of DM, CP, and NDF were affected by the levels of fNDF of the diets in a quadratic behaviors and were higher on the levels of fNDF which had lower consumption of MS while the coefficient of digestibility of NFC has been so influenced linear decreasing, reducing 0.66% for each unit of increase in the fNDF of the diets. There was a quadratic effect of fNDF levels of the diets on the nitrogen balance, which was positive at all levels, showing efficiency of the diets on the supply of protein for the animals. / Doutor

Made available in DSpace on 2014-06-11T19:32:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-07-27Bitstream added on 2014-06-13T19:03:44Z : No. of bitstreams: 1 ribeiro_ms_dr_botfmvz.pdf: 580098 bytes, checksum: d9ecebb398d17d8fec03f05fbe984a43 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Universidade Estadual Paulista (UNESP) / O objetivo deste trabalho foi avaliar a influência dos níveis de fibra em detergente neutro oriundo da forragem (FDNf) em dietas peletizadas, sobre o consumo e digestibilidade aparente da matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN) e carboidratos não fibrosos (CNF); e balanço de nitrogênio. Foram utilizadas cinco cabras fistuladas no rúmen dispostas em quadrado latino 5x5, sendo os níveis de FDNf de 15, 20, 25, 30 e 35% , as variáveis independentes. Os níveis de FDNf influenciaram de maneira quadrática os consumos de MS, PB, FDN e CNF expressos em % PV ou em unidade de peso metabólico (P<0,05). O maior consumo de MS foi encontrado no nível de 25,69% de FDNf e o valor médio de consumo de MS foi de 1,3% PV, inferior ao recomendado pelo NRC (1981) (1,46% PV), no entanto as exigências nutricionais foram atendidas em todas as dietas. Os coeficientes de digestibilidade aparente da MS, PB, e FDN foram influenciados de maneira quadrática pelos níveis de FDNf nas dietas, e foram maiores nos níveis de FDNf que apresentaram menor consumo de MS enquanto que o coeficiente de digestibilidade aparente dos CNF foi influenciado de maneira linear decrescente, diminuindo 0,66% para cada unidade de aumento dos níveis de FDNf nas dietas. Houve efeito quadrático dos níveis de FDNf nas dietas sobre o balanço de nitrogênio, o qual foi positivo em todos os níveis, mostrando eficiência das dietas quanto ao suprimento de proteína para os animais. / The purpose of this study was to evaluate the influence of the levels of neutral detergent fiber from forage (fNDF) in pelleted diets on the intake and digestibility of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF) and on non-fibrous carbohydrates (NFC); and nitrogen balance. Five fistulated in the rumen goats were used, arranged in 5x5 Latin square, and the levels of fNDF 15, 20, 25, 30 and 35%, being the independent variables. Effect quadratic of the levels of fNDF on the intake of DM, CP, NDF and NFC expressed in % LW, or unit of metabolic weight (P<0,05). The higher consumption of DM was found in the level of 25.69% of fNDF and the average consumption of MS was 1.3% of LW, below that recommended by NRC (1981) (1.46% LW), however the nutritional requirements were met in all diets. The coefficients of apparent digestibility of DM, CP, and NDF were affected by the levels of fNDF of the diets in a quadratic behaviors and were higher on the levels of fNDF which had lower consumption of MS while the coefficient of digestibility of NFC has been so influenced linear decreasing, reducing 0.66% for each unit of increase in the fNDF of the diets. There was a quadratic effect of fNDF levels of the diets on the nitrogen balance, which was positive at all levels, showing efficiency of the diets on the supply of protein for the animals.

Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-04-25T14:45:45Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marluci_olicio_ortencio.pdf: 1170807 bytes, checksum: 23a1c0f0707ba7e9969108b7576f083f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2017-05-16T19:43:15Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marluci_olicio_ortencio.pdf: 1170807 bytes, checksum: 23a1c0f0707ba7e9969108b7576f083f (MD5) / Made available in DSpace on 2017-05-16T19:43:15Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) marluci_olicio_ortencio.pdf: 1170807 bytes, checksum: 23a1c0f0707ba7e9969108b7576f083f (MD5) Previous issue date: 2016 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Esta pesquisa foi realizada para determinar os efeitos da suplementa??o de feno de tifton-85 na dieta de milho gr?o inteiro e pellet comercial, sendo avaliados: os consumos de mat?ria seca e de nutrientes; a digestibilidade total aparente, a recupera??o do milho n?o degradado nas fezes e o comportamento ingestivo. O experimento foi conduzido no Setor de Nutri??o de Ruminantes da Fazenda Experimental Santa Paula da Universidade Federal dos Vales do Jequitinhonha e Mucuri, no munic?pio de Una?. O delineamento experimental adotado foi em quadrado latino, representado por quatro tratamentos (mistura 85% milho gr?o inteiro + 15% pellet comercial acrescido de n?veis de suplementa??o do feno de tifton-85 (0, 0,2, 0,4 e 0,8% do peso corporal), em quatro per?odos experimentais, com duas repeti??es (oito animais), resultando assim em dois quadrados latinos simult?neos. Para os consumos de mat?ria seca total (CMST), prote?na bruta total (CPBT), nutrientes digest?veis totais (CNDTT) e mat?ria mineral total (CMMT) n?o foi encontrada diferen?a (P>0,05) entre os tratamentos estudados. Foi observado efeito (P<0,05) apenas para o consumo de fibra insol?vel em detergente neutro total (CFDNT). Foi observado efeito significativo (P<0,05) para os consumos de: mat?ria seca do feno (CMSF), prote?na bruta do feno (CPBF), fibra em detergente neutro do feno (CFDNF) e mat?ria mineral do feno (CMMF) em fun??o dos n?veis de suplementa??o. Para as vari?veis referentes aos consumos de mat?ria seca e de nutrientes da mistura milho + pellet e consumo de feno em rela??o ao peso corporal (CMSF2) n?o houve efeito. Para as digestibilidades de mat?ria seca e nutrientes, n?o houve efeito (P>0,05) entre os tratamentos avaliados. Observou-se resposta linear decrescente (P<0,05) no percentual de milho recuperado nas fezes, entre os tratamentos avaliados, para as tr?s peneiras utilizadas, com diferentes crivos. Observou-se influ?ncia dos n?veis de feno (P<0,05) sobre os tempos despendidos pelos animais em alimenta??o (TAL), rumina??o (TRU) e mastiga??o total (TMT), j? o tempo despendido para o ?cio (TO) n?o foi influenciado pelos tratamentos. As vari?veis tempo mastiga??es por bolo (TM/bolo) e n?mero de mastiga??es por bolo (NM/bolo) n?o diferiram (P>0,05), j? o n?mero de mastiga??es dia (NM/dia) e n?mero de bolos ruminais (NBR) apresentaram diferen?a significativa (P<0,05). Foi observado efeito para as efici?ncias de alimenta??o (EALMS) e rumina??o (ERUMS) da mat?ria seca (P<0,05), enquanto que a efici?ncia de rumina??o da fibra em detergente neutro (ERUFDN) e taxa de rumina??o (TR), n?o tiveram efeito (P>0,05), entre os tratamentos estudados. Os n?veis suplementares de feno na dieta reduziram o percentual de milho nas fezes, proporcionou maiores tempos de rumina??o e mastiga??o. A dieta de milho e pellet mostrou-se eficiente para a manuten??o do pH ruminal. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / This research was conducted in order to determine the effects of Tifton-85 hay supplementation in corn grain diet and commercial pellet in dry matter and nutrient intake; the apparent total tract digestibility of nutrients, the recovery of non-degraded corn in feces, and feeding behavior. The experiment was conducted in the Ruminant Nutrition Section of the Experimental Farm Santa Paula from Universidade Federal dos Vales do Jequitinhonha e Mucuri at Una? city. The experimental design was a Latin Square, represented by four treatments (mixture 85% corn grain + 15% commercial pellet plus levels of Tifton-85 hay supplementation (0, 0.2, 0.4, 0.8% of body weight)), in four experimental periods with two repetitions (eight animals), resulting in two simultaneous Latin squares. To the intake of total dry matter (ITDM), total crude protein (ITCP), total digestible nutrients (ITDN), and total mineral matter (ITMM) there was not significant difference (P > 0.05) between the treatments studied. It was observed an effect (P < 0.05) only for consumption of total insoluble fiber in total neutral detergent (TNDF). Significant effect was observed (P< 0.05) for the intake of: dry matter of hay (IDMH), crude protein of hay (ICPH), neutral detergent fiber of hay (INDFH), and mineral matter of hay (IMMH) in function of supplementation levels. For the variables related to the intake of dry matter and nutrients of the corn mixture + pellet and dry matter intake of hay in relation to body weight (IDMH2) there was no effect. There was not effect (P > 0.05) for the digestibility of dry matter and nutrient among the treatments. It was observed decreasing linear response (P < 0.05) in corn percentage recovered in feces between the treatments evaluated for the three sieves worked with different screens. There was influence of hay levels (P < 0.05) on the time spent by the animals in feeding (TFE), rumination (TRU), and total chewing time (TCT) but at the time spent on leisure (TL) there was not effect (P > 0.05). The variables chews time per bolus (CT/bolus), and number of chews per bolus (NC/bolus) did not differ between treatments (P > 0.05), but the number of chews per day (NC/day), and number of ruminal bolus (NRB) showed significant differences (P< 0.05). It was observed effect for feed efficiency (EFDM), and rumination (ERUDM) of dry matter (P < 0.05) while rumination efficiency of neutral detergent fiber (ERUNDF), and rumination rate (RR) had no effect (P > 0.05) among the treatments. The supplementary levels of hay in the diet reduced the percentage of corn in feces, and provided longer times of rumination and chewing. Corn grain and pellet diet is efficient in maintaining rumen pH.

Particle size distribution of diet, feces, and change from diet to feces, as well as apparent digestibility (aDig, %) of selected nutrients, and novel fecal microbiome identification of mature female leopard tortoises (Stigmochelys pardalis, n = 16) fed exclusively one of three, nutritionally complete, pelleted diets were evaluated in a blind, complete randomized design study. Two diets included insoluble fiber (powdered cellulose) consisting of either 2.0 mm or 0.2 mm length. Insoluble fiber provides nutritional and physical benefits to both the animal host and the microorganisms that inhabit the gastrointestinal tract. Insoluble fiber length was used as a means of evaluating a physically effective fiber (peNDF) definition for hindgut-fermenting vertebrates. Numerical trends of each diet particle size distribution indicated a greater amount of particle recovery on the 2.0 mm sieve for the 2.0 mm diet, and a greater particle recovery on the 0.125 mm sieve for the 0.2 mm diet, both as expected based on the added fiber lengths. Fecal particle size distributions were not different between diets, however, distributions of the change in particle size from diet to feces were different between diets. Similar fecal particle size distributions across diets suggests both cellulose lengths are below the peNDF threshold of the leopard tortoise. Apparent digestibility (aDig, %) of dry matter (DM) and organic matter (OM) was not different based on diet, method, or a diet and method interaction; aDig (%) of neutral detergent fiber (aNDF) and sequential acid detergent fiber (sADF) was different based only on diet. These results suggest that while aDig (%) of OM did not change, the source of OM digestibility shifted, as both aNDF and sADF digestibility increased with the cellulose-added diets compared to the control diet. An increase in insoluble fiber digestibility suggests an "effectiveness" of the cellulose lengths. At both bacterial phyla and genera levels, fecal microbiomes were more similar between tortoises fed the cellulose-added diets versus the control diet, suggesting that the hindgut microbial communities adjusted in the hindgut of the tortoises fed the cellulose-added diets by shifting proportions of microbes, based on their role in the hindgut (i.e., cellulose digestion), to accommodate for the addition of cellulose in the two treatment diets. This may explain the similarity among fecal particle size distributions, and suggests that adaptability of the hindgut microbial communities should be considered when defining peNDF for hindgut-fermenting vertebrates.

Submitted by (edna.saturno@ufrpe.br) on 2017-05-18T15:22:39Z No. of bitstreams: 1 Suellen Brandao de Miranda Costa.pdf: 213046 bytes, checksum: 76bad3296774bcbeff36cc967a27fee8 (MD5) / Made available in DSpace on 2017-05-18T15:22:39Z (GMT). No. of bitstreams: 1 Suellen Brandao de Miranda Costa.pdf: 213046 bytes, checksum: 76bad3296774bcbeff36cc967a27fee8 (MD5) Previous issue date: 2009-08-18 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / The purpose of this paper was to evaluate the effect of different sources of fiber (tifton hay, soybean hulls and whole cottonseed) in forage cactus-based diets for sheep in feedlot termination. In the research, 21 sheep were used with no defined racial standard, non-castrated with initial average weight of 18.90 ± 1.07 kg. The intake of dry and organic matter, total carbohydrates and total digestive nutrients, were not influenced by the different fiber sources (1.10; 0.97; 0.73 and 0.80 kg/day, respectively). The animals which received diets containing whole cottonseed presented lower intake of crude protein and neutral detergent fiber (0.11 and 0.29 kg/day respectively) and greater intake of ether extract (0.048 kg/day). The different sources of fiber propitiated similar feeding time, however the rumination time was greater for tifton hay (429.05 min/day). The digestibility coefficient of dry and organic matter differed between the treatments, where the diet with soybean hulls showed greater digestion(83.23 and 86.72%, respectively). The diet with whole cottonseed presented the smallest digestibility coefficient of crude protein (68.95%) and greatest for ether extract (85.94%). The daily weight gain of animals fed with whole cottonseed was smallest (0.11 kg/day). It is recommended the use of tifton hay or soybean hulls as a source of fiber in forage cactus-based diets for SPRD sheep in feedlot termination. / Objetivou-se avaliar o efeito de diferentes fontes de fibra (feno de capim tifton, casca de soja e caroço de algodão) em dietas à base de palma forrageira para ovinos em terminação. Foram utilizados 21 ovinos sem padrão racial definido, não castrado com peso inicial médio de 18,90 ± 1,07 kg. O consumo de matéria seca e orgânica, carboidratos totais e nutrientes digestíveis totais, não foram influenciados, pelas diferentes fontes de fibra (1,10; 0,97; 0,73 e 0,80 kg/dia, respectivamente). Os animais que receberam dietas contendo caroço de algodão apresentaram menor consumo de proteína bruta e fibra em detergente neutro (0,11 e 0,29 kg/dia respectivamente) e maior consumo de extrato etéreo (0,048 kg/dia). As diferentes fontes de fibra propiciaram tempo de alimentação semelhante, porém o de ruminação foi maior para o feno de capim tifton (429,05 min/dia). O coeficiente de digestibilidade da matéria seca e orgânica diferiu entre os tratamentos, apresentando maior digestão a dieta com casca de soja (83,23 e 86,72%, respectivamente). A dieta com caroço de algodão apresentou menor coeficiente de digestibilidade da proteína bruta (68,95%) e maior do extrato etéreo (85,94%). O ganho de peso diário dos animais alimentados com caroço de algodão foi inferior (0,11 kg/dia). Recomenda-se a utilização de feno de capim tifton ou casca de soja como fonte de fibra em dietas à base de palma forrageira para ovinos SPRD em terminação.

Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2014-10-09T13:45:17Z No. of bitstreams: 2 Dissertação - Douglas de Almeida Lima - 2011.pdf: 787713 bytes, checksum: 9d4fa1fdcf2f6c61556740302d7ed8c4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-10-09T14:42:11Z (GMT) No. of bitstreams: 2 Dissertação - Douglas de Almeida Lima - 2011.pdf: 787713 bytes, checksum: 9d4fa1fdcf2f6c61556740302d7ed8c4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2014-10-09T14:42:11Z (GMT). No. of bitstreams: 2 Dissertação - Douglas de Almeida Lima - 2011.pdf: 787713 bytes, checksum: 9d4fa1fdcf2f6c61556740302d7ed8c4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2011-08-26 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / This trial was realized in the veterinary and animal science school at Universidade Federal de Goias. The objective was to evaluate five diets, four of these diets was composed by ground corn with different fiber sources for each ration and one control treatment with whole corn (MI) without fiber source. The fiber sources used was sugar cane bagass (BIN), industrial corn residue silage (RM), soybean hulls (CS), cotton seed (CA). Five castrated Nellore steers with an average of 195 kg of body weight and with rumen fistulae, were used in this trial. The animals were distributed in individual pen provided of individual covered feeder and water tank for each two animals. Each period spent 19 days, with 10 days for food adaptation and nine days for collect of data. During the interval of collects were evaluated: feed behavior, ruminal pH, ammoniacal nitrogen, short chain of fatty acids, total counting of protozoa, fecal pH, total digestibility and dry mater, crude protein (PB), ether extract (EE), neutral detergent fiber (FDN) and acid detergent fiber (FDA) intakes. Latin square and Duncan test for 5% of probability were used for statistical analysis. The treatment BIN had the highest dry matter intake, although CA had the lowest value. The ether extract intake was highest for MI treatment, followed by CA and the CS had the lowest value. The highest values for FDN and FDA intakes were in treatment BIN. It was observed some rejection of cotton seed by the animals. The values for total digestibility for CA, RM, BIN, CS and MI treatments were 68.50; 66.19; 65.87; 64.20 e 56.15. The treatment CA showed greater DMD than CS (P<0.05). The treatments RM and BIN spent more time for ruminating and chewing activity. The value of ruminal pH in treatment BIN was greater than RM and CS (P<0.05). The treatments MI and CA weren´t different from RM and CS (P>0.05). In protozoa counting the highest numbers were observed for CS and BIN treatments. Although the lowest numbers for protozoa counting was founded for CA. Animal differences were noted in protozoa counting. The highest values for total short chain fatty acids were founded for CS, that was the same of RM (P>0.05), although BIN, MI and CA had the lowest value. Highest xiv values for propionate and acetate were found in CS treatment. The acetate:propionate ratios were higher in BIN, but for the others treatments the value didn´t differed between them (P>0.05). Butyrate, ammonia nitrogen and fecal pH any differences were found (P>0.05). It was concluded that sugar cane bagasse was the fiber source that keep a good result for ruminal pH, protozoa counting, dry matter intake and the total digestibility wasn´t different from the others. According to that we can conclude that sugar cane bagasse showed more efficient than the others fiber sources in the tested levels. / O objetivo deste ensaio foi avaliar cinco dietas, sendo quatro delas compostas por milho moído fino e com fontes distintas de fibra para cada ração e um tratamento com milho inteiro (MI). As fontes de fibras utilizadas foram: 1) bagaço de cana in natura (BIN); 2) resíduo de milho verde (RM); 3) casca de soja (CS) e 4) caroço de algodão (CA). Foram utilizados cinco animais castrados da raça Nelore, com peso médio de 195 kg e com fístula ruminal. Os animais foram distribuídos em baias individuais cobertas dotadas de comedouros individuais e bebedouros para cada duas baias. O período experimental teve duração de dezenove dias com dez dias de adaptação e nove dias de coletas. Durante o intervalo de coletas foram avaliados o comportamento ingestivo, o pH ruminal, o nitrogênio amoniacal, os ácidos graxos de cadeia curta, a contagem total de protozoários ruminais, o pH fecal, a digestibilidade no trato total, bem como o consumo de MS, PB, EE, FDN e FDA. O delineamento experimental utilizado foi o quadrado latino 5x5 e para comparações de médias foi utilizados o teste Duncan a 5% de probabilidade. O tratamento BIN teve maior CMS que RM, CS e CA (P<0,05). O consumo de EE do tratamento MI foi maior que CS e RM (P<0,05), porém não diferiu de CA (P>0,05). O maior consumo de FDN foi para o tratamento BIN. O consumo de FDA foram maiores para BIN e RM. Observou-se certa rejeição do caroço de algodão pelos animais, comprovado pelo menor consumo de FDN e FDA no tratamento CA (P<0,05) se igualando ao controle MI (P>0,05). O tratamento CA apresentou uma maior DMS que CS (P<0,05), enquanto que os demais tratamentos não diferiram entre si (P>0,05). Quanto ao comportamento ingestivo, os tratamentos RM e BIN foram os que obtiveram os maiores tempos de atividade mastigatória (p<0,05). O tratamento BIN teve um maior tempo de ruminação que os tratamentos CS e CA (P<0,05). Os valores de pH ruminal para BIN foi maior que RM e CS (P<0,05), porém, não diferiu de MI e CA (P>0,05). Os tratamentos MI e CA não diferiram de RM e CS (P>0,05), quanto ao pH ruminal. Na contagem de protozoários os maiores números foram observados pelos tratamentos CS (P<0,05). Enquanto que o menor número de protozoários foi encontrado no tratamento CA (P<0,05). Houve influência do xii animal nos resultados de contagem de protozoários. Os maiores valores para os ácidos graxos de cadeia curta totais foram encontrados para o tratamento CS, que não diferiu de RM, enquanto que BIN, MI e Ca tiveram as menores produções de ácidos graxos de cadeia curta totais. Foi em CS que encontrou maiores valores de propionato e acetato. Quanto à relação acetato: propionato foi maior para BIN, enquanto que para os demais tratamentos não houve diferença entre si (P>0,05). Quanto ao butirato, ao nitrogênio amoniacal e ao pH fecal não foram encontradas diferenças significativas entre os tratamentos (P>0,05). Conclui-se que o bagaço de cana foi a fonte de fibra que conseguiu manter um bom valor de pH, de contagem de protozoários, além de maior consumo de matéria seca e digestibilidade semelhante aos demais tratamentos. Portanto nos níveis testados o tratamento BIN se mostrou igual ao controle MI, no entanto foi mais eficiente quando comparado das demais fontes de fibras.