The chapter highlights the economic significance of statistical assessment of amino acid dose-response data with regard to different production goals. Based on empirical results obtained in a total of 25 dose-response studies conducted in growing broilers, ducks and turkeys, the most important essential amino acids methionine, lysine and threonine are discussed with a view of deriving the most profitable dietary specifications for a poultry integration. In general, it was observed that the process of deciding on raw material quality and nutrient specifications in feed should begin with defining the properties of the desired product. The findings demonstrate large differences in economically optimum dietary amino acid levels depending on the product to be marketed. The optimum levels are relatively robust in terms of differences in feed cost or cost of supplemented amino acids. This approach may well be extended to other nutrients and is meant to serve as a general tool in making decisions regarding diet specifications.
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