Introduction of a new protein evaluation system in pig nutrition in Germany | Einführung eines neuen Proteinbewertungssystems für Schweine in Deutschland
2005
Mosenthin, R. | Eklund, M.
If one accepts that the determination of amino acid digestibility values should be based on the ileal analysis method, these digestibility coefficients should be consistent with two main specifications: Firstly, they must allow feed ingredients to be accurately compared, thus being independent of experimental and dietary conditions. Secondly, they must include any variation of the endogenous fraction related to the feedstuff itself, which is one of its attributes and must be considered in diet formulation. These specifications hold true for estimates of standardised ileal protein and amino acid digestibilities. The transformation of apparent into standardised ileal protein and amino acid digestibility values is based on estimates for the correction of basal endogenous amino acid losses. Standardised ileal amino acid digestibility coefficients are independent of the amino acid level in the assay diet and reflect a fundamental property of the feedstuff itself, not being influenced by differences in dietary conditions. Consequently, standardised ileal amino acid digestibility values can be used in diet formulation for growing pigs to quantify the amino acids, available for maintenance and growth, of commonly used feed ingredients. The new German protein evaluation system for pigs is based on the concept of standardised ileal amino acid digestibility, and was introduced in 2005 by the German Society of Nutrition Physiology.
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