Concentrate levels on sheep diets: intake, digestibility and ruminal parameters

Daniel Marino Guedes de Carvalho, Robson Reverdito, Luciano da Silva Cabral, Joadil Gonçalves de Abreu, Rosemary Lais Galati, Alexandre Lima de Souza, Índia Joaelma Gattas Monteiro, Antonio Rodrigues da Silva

Abstract


This study aimed to evaluate the intake, digestibility of nutrients, pH, ruminal ammonia concentration in sheep fed diets with increasing levels of concentrate: 15, 30, 45, 60 and 75% in the diet. Five sheep distributed in 5x5 Latin square design were used. The animals were kept in individual pens. Each experimental period lasted 17 days. Fecal excretion was estimated by use of indigestible neutral detergent fiber. On the 17th day, the pH of the rumen fluid and the concentrations of ruminal ammonia nitrogen were measured. Increased levels of concentrate did not affect dry matter intake, while the NDF intake was reduced by 0.0074 kg / animal / day for each 1% of concentrate added. The digestibility of DM was increased by 0.51% for each 1% concentrate. The pH of the rumen fluid was reduced by 0.006 units for each 1% concentrate. NAR for the estimated maximum value of 19.13 mg / dL of rumen fluid to the level of 38.67% concentrate.


Keywords


Grain; Ruminal ammonia nitrogen; Rumen pH.



DOI: http://dx.doi.org/10.5433/1679-0359.2014v35n5p2649

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional