Effects of low-protein diets supplemented with essential amino acids on growth performance, meat quality, and nitrogen retention in growing Japanese quails.

摘要: Protein is a costly ingredient in poultry diets. On the one hand, insufficient levels of amino acids can lead to lower performance, because deficiency of amino acids restricts protein synthesis (Lima et al., 2016). On the other hand, the over-consumption of protein is not economical since it leads to the degradation of surplus amino acids (Perry et al., 2004). Poultry excreta and its nitrogenous compounds resulting in nitrite or nitrate contamination of water, and subsequently increases air pollution due to the release of ammonia (Vieira and Angel, 2012). Therefore, one of the most important strategies to reduce environmental pollution is to reduce nitrogen excretion in poultry manure. Partial replacement of dietary protein during the growing and laying phases by appropriate amino acids has been the issue of many experiments in recent decades (Si et al., 2004; Abudabos and Aljumaah, 2012; Belloir et al., 2017;