Amino Acid Recommendations for laying hens
نویسنده
چکیده
During recent decades productivity of laying hens increased substantially (Elliot, 2008). Not only egg number, egg mass, and feed conversion has increased but also persistency of lay has improved. As such, this must have implications on the optimal amino acid nutrition of current laying hen strains. Simply stated, increasing egg mass output per hen means an increased amino acid output which has to be provided by the feed. Moreover, while performance criteria of laying hens have improved, body weight has decreased (Elliot, 2008). Consequently, the amino acid requirement for maintenance purposes is influenced. In addition to the quantitative demands for amino acids by the modern laying hen changing, there also is the potential that the qualitative demands for dietary protein might have changed as optimum amino acid composition for egg production differs from that for maintenance.
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