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Utilization of proteins for growth and egg production

The amino acid requirements of poultry and the utilization of proteins in poultry nutrition have been studied intensively in the last 20 years. In the process this species, and above all growing chickens, have become the most thoroughly tested animals with regard to their nutritional requirements. On the other hand, the introduction of new protein sources like the single-cell proteins has created a lot of new problems which have not been solved as yet, although the amino acid patterns and the digestibility of the proteins seem to be fairly good.