WAGENINGEN UR Livestock Research in the Netherlands recently conducted a meta-analysis study to update the amino acid requirements of laying hens.
The study provides amino acid requirements on both an apparent fecal digestible (AFD) and a standardized ileal digestible (SID) basis. AFD requirements of the amino acids lysine, threonine and tryptophan increased by 17%, 9% and 22%, respectively, whereas the requir
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