Hossam H. Azzaz, Ahmed E. Kholif, Ahmed M. Abd El Tawab, Noha A. Hassaan, Einar Vargas‐Bello‐Pérez

A newly developed bacteriocin like substance to replace monensin in diets of lactating ewes

  • General Agricultural and Biological Sciences
  • General Medicine
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AbstractThe aim of the present experiment was to evaluate the effect of feeding a newly produced bacteriocin‐like substance (BLS) as a replacement for monensin in the diets of lactating ewes. In Experiment 1, the effects of BLS or monensin at 0.5, 1, 1.5, and 2 g/kg diet on in vitro ruminal fermentation were compared. In Experiment 2, 30 multiparous Barki ewes were divided into three treatments in a complete randomized design for 90 days. The ewes were fed a basal diet without supplementation or supplemented with monensin or BLS at 0.5 g/kg DM diet. In Experiment 1, the highest levels of BLS and monensin decreased gas production, while all levels of additives linearly decreased methane production. In Experiment 2, BLS increased nutrient digestibility. Additives increased ruminal total and individual volatile fatty acids and decreased ruminal ammonia‐N. The BLS increased serum albumin and decreased the concentrations of serum liver enzymes, while both additives increased serum glucose and decreased urea‐N. Additives increased daily production of milk, while the BLS treatment increased the feed efficiency. It is concluded that dietary inclusion of BLS at 0.5 g/kg DM for lactating ewes is recommended to replace monensin.

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