Effect of Dietary Crude Protein on Animal Performance Blood Biochemistry Profile Ruminal Fermentation Parameters and Carcass and Meat Quality of Heavy Fattening Assaf Lambs

摘要

This study was designed to assess the optimal level of crude protein inclusion in the diet of heavy fattening Assaf lambs. Our results suggested that levels of crude protein between 134 and 173 g/kg DM (dry matter) influence the dry matter intake and performance of lambs, but no effects were observed on rumen function, animal health, or carcass and meat quality. To maximize growth performance, a minimum level of crude protein of 157 g/kg dry matter is needed, but protein content beyond that level does not improve meat quality and could worsen profitability.