Proteína degradável no rúmen associada a fontes de amido de alta ou baixa degradabilidade: digestibilidade in vitro e desempenho de novilhos em crescimento

Neto, Saul Ferreira Caldas; Zeoula, Lúcia Maria; Kazama, Ricardo; Prado, Ivanor Nunes do; Geron, Luiz Juliano Valério; Oliveira, Fábio Cortez Leite de; Prado, Odimári Pricila Pires do

doi:10.1590/s1516-35982007000200024

Cited by 9 publications

(9 citation statements)

References 23 publications

(24 reference statements)

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“…With increase in DM intake, there was increase in CP intake, but TDN did not change, so one can assume that greater weight gains for the higher levels of protein consumed were possibly limited by the energy level of the diets. According to Caldas Neto et al (2007), the lack of synchronization of the source of protein and source of energy, or even the reduction in the energy available for use of non-protein nitrogen by the rumen microorganisms can reduce the feed efficiency. The feed efficiency of TDN did not differ among the diets (P>0.05), since both TDN intake and ADG were similar for all levels evaluated.…”

Section: Resultsmentioning

confidence: 99%

Replacement of corn by babassu mesocarp bran in diets for feedlot young bulls

et al. 2013

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-Nutrient intake and digestibility and productive performance of 30 feedlot young bulls fed diets containing babassu mesocarp bran in replacement of corn were evaluated. Animals were distributed in a completely randomized design with five levels of replacement of corn by babassu mesocarp bran (BMB): 0, 250, 500, 750 and 1000 g/kg of dry matter, and six replications. The dry matter (DM) intake in kg/day, g/kg body weight (BW) and g/kgBW 0.75 increased as the corn was replaced by BMB. The intake of neutral detergent fiber (NDF) and crude protein (CP) increased linearly, whereas the intake of non-fibrous carbohydrates (NFC) had quadratic behavior. The digestibility of DM, CP, NDF and NFC and the total digestible nutrients (TDN) showed quadratic behavior with points of minimum digestibility of 850.0, 638.0, 867.0, 638.0 and 833.0 g/kg dry matter of replacement of corn by BMB, respectively. The final weight (476.82 kg) and average daily gain (1.55 kg/day) were not affected by experimental diets. The feed efficiencies of DM and CP decreased with increase in the levels of BMB, but the feed efficiency of TDN was not changed. Babassu mesocarp bran enables satisfactory performance, and depending on the price and opportunity cost, it can be utilized in the feeding of feedlot cattle totally replacing the corn of the diet.

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Section: Resultsmentioning

confidence: 99%

Replacement of corn by babassu mesocarp bran in diets for feedlot young bulls

et al. 2013

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“…Apesar de o consumo restrito poder afetar os resultados de consumo em função dos níveis de PDR, diversos trabalhos que avaliaram o efeito de dietas com diferentes níveis de PDR na dieta também não observaram efeito significativo sobre o consumo de MS (Coomer et al, 1993;Cervieri et al, 2001;Caldas Neto et al, 2007). Para novilhos em crescimento alimentados à vontade, foram fornecidas dietas com 55, 60, 65 e 70% de PDR (% da PB) e concentrado energético (farinha de varredura de mandioca) e não foram observadas diferenças sobre os consumos de MS, MO, PB, CT, CNF e FDN (Caldas Neto et al, 2007).…”

Section: Resultsunclassified

“…Para novilhos em crescimento alimentados à vontade, foram fornecidas dietas com 55, 60, 65 e 70% de PDR (% da PB) e concentrado energético (farinha de varredura de mandioca) e não foram observadas diferenças sobre os consumos de MS, MO, PB, CT, CNF e FDN (Caldas Neto et al, 2007).…”

Section: Resultsunclassified

Proteína degradável no rúmen na dieta de bovinos: digestibilidades total e parcial dos nutrientes e parâmetros ruminais

et al. 2008

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RESUMO -Quatro novilhos da raça Holandesa (450 kg) portadores de cânula ruminal e duodenal, recebendo dietas com níveis de proteína degradável no rúmen (PDR) de 50, 60, 65 e 70%, associadas a uma fonte de amido de alta degradabilidade ruminal (farinha de varredura de mandioca), foram distribuídos em quadrado latino 4 × 4 para se avaliarem as digestibilidades total e parcial dos nutrientes, a concentração de amônia e o pH ruminal. Foi utilizada, como indicador do fluxo duodenal e fecal, a cinza insolúvel em ácido. Não foi observado efeito do nível de PDR sobre o coeficiente de digestibilidade total, digestibilidade ruminal e digestibilidade intestinal da matéria seca, matéria orgânica, fibra em detergente neutro, carboidratos não-estruturais e energia bruta. O aumento do nível de PDR na dieta elevou o coeficiente de digestibilidade total e ruminal da proteína bruta e reduziu a digestibilidade intestinal desse nutriente como porcentagem do digerido. Não houve efeito dos níveis de PDR no pH ruminal, no entanto, maior concentração ruminal de amônia foi observada para as dietas com maior teor de PDR. Os resultados obtidos indicaram que o aumento no teor de PDR acarretou maior produção de nitrogênio na forma de amônia, independentemente da presença da fonte de amido de alta degradabilidade ruminal, contudo, o aporte de proteína intestinal foi semelhante para todas as dietas.Palavras-chave: farinha de peixe, farinha de varredura de mandioca, novilhos, uréia Rumen degradable protein on bovine diet: total and partial nutrient digestibility and ruminal parameters ABSTRACT -Four ruminally and duodenally cannulated Holstein steers (450 kg) were fed diets with rumen degradable protein (RDP) levels of 50.0 60.0 65.0 and 70.0% associated with a high ruminal degradability starch (cassava by-product meal) were allotted to a 4 × 4 Latin square design for the evaluation of total and partial digestibility of the nutrients, ruminal ammonia concentration and pH. The acid insoluble ash was used as a marker of the duodenal and fecal flow. No effects were observed on the level of RDP on total digestibility coefficient, ruminal digestibility and intestinal digestibility coefficients of dry matter, organic matter, crude protein, neutral detergent fiber, non structural carbohydrates and gross energy. The increase of the RDP levels in the diet increased the coefficients of total and ruminal digestibility of crude protein and reduced the intestinal digestibility of this nutrient as a percentage of the digested. There was no effect of RDP levels on the ruminal pH, however, higher ammonia concentration was observed for the diets with higher level of RDP. The results indicated that the increase in the level of PDR cause a higher production of nitrogen in the ammonia form, independently of the presence of the source of high ruminal degradability starch, however the contribution of intestinal protein was similar for all the diets. Key Words: cassava by-product meal, fish meal, steers, urea IntroduçãoA disponibilidade de aminoácidos para absorção ...

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“…To increase the level of ammonia derived from degradable proteins or non-protein nitrogen sources in the rumen, IVDDM can be increased without necessarily increasing microbial activity, primarily in diets containing highly soluble urea (CALDAS NETO et al, 2007) because rumen microbiota have nitrogen requirements that are beyond the availability of ammonia (FIRKINS, 2010).…”

Section: ------------------Urea Level In the Pellet (%)--------------mentioning

confidence: 99%

Digestibility of pelleted rations containing diverse potato flour and urea

Martinele

Paiva

Lopes³

et al. 2015

Cienc. Rural

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The aim of this study was to evaluate ruminal in situ degradability and in vitro digestibility of dry matter (DM) in concentrate supplements containing diverse potato flour pelletized with urea (0%, 4%, 8%, and 12% DM). Samples of feeds were incubated for 0, 2, 4, 8, 12, 24, 36, and 48h RESUMO Objetivou-se avaliar a degradação ruminal in situ da matéria seca (MS) e a digestibilidade in vitro de suplementos concentrados a base de farinha de batata diversa peletizada com ureia (0, 4, 8 e 12% da MS). Amostras de cada tratamento foram incubadas por 0, 2, 4, 8, 12, 24, 36

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Proteína degradável no rúmen associada a fontes de amido de alta ou baixa degradabilidade: digestibilidade in vitro e desempenho de novilhos em crescimento

Cited by 9 publications

References 23 publications

Replacement of corn by babassu mesocarp bran in diets for feedlot young bulls

Replacement of corn by babassu mesocarp bran in diets for feedlot young bulls

Proteína degradável no rúmen na dieta de bovinos: digestibilidades total e parcial dos nutrientes e parâmetros ruminais

Digestibility of pelleted rations containing diverse potato flour and urea

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