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  • Detmann, Edenio  (3)
  • 2005-2009  (3)
  • Biodiversity Research  (3)
  • 1
    Online Resource
    Online Resource
    Performance of dairy calves fed milk, milk replacer or post-weaning concentrate with acidifiers
    FapUNIFESP (SciELO) ; 2009
    In:  Revista Brasileira de Zootecnia Vol. 38, No. 5 ( 2009-05), p. 956-963
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 38, No. 5 ( 2009-05), p. 956-963
    Abstract: Objetivou-se avaliar o efeito da adição de acidificantes ao leite, sucedâneo do leite ou concentrado pós-desmame sobre o desempenho e o status de saúde de bezerros ao desmame e pós-desmame. Três experimentos foram realizados: no primeiro experimento, 62 bezerros mestiço Holandês × Zebu (machos e fêmeas), criados a partir do nascimento ate 60 dias de idade, foram distribuídos e alimentados com leite com ou sem acidificante. A partir do terceiro dia, os bezerros foram aleitados (5 L de leite/dia) por 56 dias, divididos em duas refeições. O acidificante foi adicionado ao leite no momento da alimentação. A partir da segunda semana de idade do bezerro, uma dieta inicial (18% de proteína bruta,PB) foi também oferecida. No segundo experimento, os mesmos animais do primeiro experimento, mas dos 61 aos 120 dias de idade, foram distribuídos e alimentados (2 kg/dia) com concentrado pós-desmame (18% de PB) com ou sem acidificante e feno Cynodon dactylon à vontade. No terceiro experimento, 16 bezerros machos, mestiço Holandês × Zebu, criados do nascimento até aos 60 dias de idade, foram distribuídos e alimentados com substitutos do leite, com ou sem acidificante. O acidificante utilizado no primeiro e terceiro experimentos foi composto pelos ácidos cítrico, lático, fumárico, fosfórico e vitamina C (dieta líquida) e por betaglucanas, flavonoides, ácidos linoléico, oleico e cítrico e vitamina C (dieta sólida). A adição de acidificante ao leite ou ao concentrado pós-desmame não afetou a ingestão de matéria seca (MS) e de PB, que foram 818 e 196, 1740 e 217 g/dia, respectivamente. Do mesmo modo, não apresentaram grande ganhos médios diários com 525 e 513 g/dia, respectivamente. A adição de acidificante ao sucedâneo do leite apresentou resultados semelhantes aos observados nos bezerros alimentados com leite. Portanto, o uso de acidificantes no leite, sucedâneo do leite ou no concentrado pós-desmame não tem efeitos benéficos em bezerros.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982009000500024
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2009
    detail.hit.zdb_id: 2078814-9
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  • 2
    Online Resource
    Online Resource
    Níveis de concentrado na dieta de bovinos Nelore de três condições sexuais: consumo, digestibilidades total e parcial, produção microbiana e parâmetros ruminais
    FapUNIFESP (SciELO) ; 2008
    In:  Revista Brasileira de Zootecnia Vol. 37, No. 5 ( 2008-05), p. 951-960
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 37, No. 5 ( 2008-05), p. 951-960
    Abstract: Twelve Nellore of three sexual categories (four heifers, four bulls and four steers) averaging 15 months of age and body weight of 235, 249, and 239 kg, respectively, were assigned to a completely randomized design with a 2 × 3 factorial arrangement (two levels of concentrate - 25 or 50% and three sexual categories) to evaluate intake, partial and total digestibility of nutrients, microbial protein synthesis and ruminal metabolism. The collection of ruminal fluid was done before and at 2, 4, and 6 hours post-feeding to determine pH and ammonia concentration. With the exception of EE, no other significant effect of concentrate levels and sexual categories was observed on intake and partial or total tract digestibility of nutrients. The intakes of DM, OM, EE, CP, NFC, and TDN (kg/day) and DM (% BW or g/kg0.75) were affected neither by the concentrate levels nor by sexual category. Increasing dietary concentrate levels decreased NDF digestibility. Average bacterial N contents ranged from 6.91 to 7.39. No significant effect of concentrate levels and sexual category was observed on duodenal flow of nutrients and microbial efficiency excepted when expressed as gNmic/kgOMDR. Maximum ruminal NH3 concentration (14.55 mg/dL) was estimated at 1.83 hours after-feeding. It was concluded that increasing dietary concentrate levels did not affect intake, partial and total tract digestibility of most nutrients and microbial protein synthesis.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982008000500025
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2008
    detail.hit.zdb_id: 2078814-9
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  • 3
    Online Resource
    Online Resource
    Níveis de proteína na dieta de bovinos Nelore de três condições sexuais: consumo, digestibilidades total e parcial, produção microbiana e parâmetros ruminais
    FapUNIFESP (SciELO) ; 2007
    In:  Revista Brasileira de Zootecnia Vol. 36, No. 4 suppl ( 2007-08), p. 1199-1211
    Details
    In: Revista Brasileira de Zootecnia, FapUNIFESP (SciELO), Vol. 36, No. 4 suppl ( 2007-08), p. 1199-1211
    Abstract: Twelve Nellore cattle fitted with ruminal and duodenal cannulas were used to investigate the effects of increasing dietary crude protein level (7, 10, 13, and 15%) on intake, ruminal and total tract digestibility of nutrients, microbial protein synthesis, degradabilities of corn silage, corn starch, and cottonseed meal, and ruminal metabolism. Animals were blocked by sexual category (heifers, bulls and steers averaging 254.8, 285.1, and 265.6 kg of body weight, respectively) and then assigned to one out of three Latin squares. Samples were incubated in the rumen of one animal of each sexual category to estimate ingredient degradability after determination of DM, CP and NDF in the incubation residues. Ruminal fluid was collected before and after-feeding to determine pH and concentration of ammonia while ruminal samples for bacterial isolation were taken 6 hours post-feeding. Blood (BUN) and urine (UU) were also collected for measurement of urea concentration. The degradation rates of DM and CP were both lower in corn silage than on corn starch and cottonseed meal. The interaction sexual condition x dietary crude protein level was not significant for nutrient intake. With the exception of EE and NFC, no other significant effect of dietary CP level was observed for daily intake of nutrients. Increasing dietary CP level affected total tract digestibilities of DM, OM, CP, NDF, and NFC and also resulted in higher concentrations of BUN and UU. A significant dietary crude protein level x collection time interaction was observed for ruminal NH3 but not for ruminal pH. It was concluded that increasing dietary CP levels affected intake and total tract digestibility of most nutrients.
    Type of Medium: Online Resource
    ISSN: 1516-3598
    URL: Article
    DOI: 10.1590/S1516-35982007000500029
    Language: Unknown
    Publisher: FapUNIFESP (SciELO)
    Publication Date: 2007
    detail.hit.zdb_id: 2078814-9
    Location Call Number Limitation Availability
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