Intake, digestibility and blood metabolites of lambs fed increasing levels of exogenous fibrolytic enzymes

Authors

DOI:

https://doi.org/10.5433/1679-0359.2024v45n4p1013

Keywords:

Sheep, Fibrolytic enzyme, Consumption.

Abstract

The present study aimed to evaluate how the increasing addition of exogenous fibrolytic enzymes in the diet of ewe lambs influenced feed intake, digestive capacity and blood metabolites. The trial was conducted in a 5×5 Latin square design with 5 treatments and 5 replications, using crossbred Santa Inês × Dorper ewe lambs with an average initial weight of 46.48 ± 5.60 kg and approximately 7 months of age. Over a period of 60 days, the animals were housed in individual metabolic cages. The treatments consisted of a control diet and four increasing levels of inclusion of fibrolytic enzymes (FIBROZYME®) (0.5, 1.0, 1.5, and 2.0% of dry matter), administered daily at the time of diet offering. There were no significant differences in nutrient intake (g animal−1 day−1), live weight (%PV−1), and metabolic weight (PV0.75) among treatments. There were also no significant differences in the apparent dry matter digestibility, fecal weight or fecal score. However, there was a significant difference in the blood metabolite creatinine but not in the animals’ blood glucose levels. Therefore, the addition of exogenous fibrolytic enzymes does not influence the feed intake or blood glucose of ewe lambs but alters plasma creatinine.

Author Biographies

Ana Beatriz Inácio de Freitas, Universidade Federal de Uberlândia

Graduate Student of the Master's Program in Veterinary Sciences, Universidade Federal de Uberlândia, UFU, Uberlândia, MG, Brazil.

Lucas Eduardo Vilaça , Universidade Federal de Uberlândia

Graduate Student of the Master's Program in Veterinary Sciences, UFU Uberlândia, MG, Brazil.

Ariadne Freitas Silva , Universidade Federal de Uberlândia

PhD Student in the Veterinary Sciences Graduate Program, UFU, Uberlândia, MG, Brazil.

Luciano Fernandes de Sousa , Universidade Federal do Norte do Tocantins

Teacher. Doctor of the Undergraduate Course in Animal Science, Universidade Federal do Norte do Tocantins, UFNT, Araguaína, TO, Brazil.

Erica Beatriz Schultz , Universidade Federal de Viçosa

Teacher. Doctor of the Undergraduate Course in Animal Science, Universidade Federal de Viçosa, UFV, Viçosa, MG, Brazil.

Jhone Tallison Lira de Sousa, Universidade Federal de Uberlândia

PhD Student in the Veterinary Sciences Graduate Program, UFNT, Araguaína, TO, Brazil.

Karla Alves Oliveira, Universidade Estadual Paulista Júlio de Mesquita Filho

PhD Student in the Veterinary Sciences Graduate Program, Universidade Estadual Paulista Júlio de Mesquita Filho, UNESP, São Paulo, SP, Brazil.

Gilberto de Lima Macedo Júnior , Universidade Federal de Uberlândia

Teacher, Doctor of the Undergraduate Course in Animal Science, UFU, Uberlândia, MG, Brazil.

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Published

2024-06-25

How to Cite

Freitas, A. B. I. de, Vilaça , L. E., Silva , A. F., Sousa , L. F. de, Schultz , E. B., Sousa, J. T. L. de, … Macedo Júnior , G. de L. (2024). Intake, digestibility and blood metabolites of lambs fed increasing levels of exogenous fibrolytic enzymes . Semina: Ciências Agrárias, 45(4), 1013–1030. https://doi.org/10.5433/1679-0359.2024v45n4p1013

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