Results of the effectivity and the requirement of selected amino acids of growing female pigs 4. combinations of protein sources with lysine methionine cystine and threonine limitations

Liebert, F.; Le-Khac, H.; Gebhardt, G.

Archives of Animal Nutrition 37(7-8): 559-568


ISSN/ISBN: 1745-039X
Accession: 006333239

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On the basis of the results of 3 previous articles on the efficiency of amino acids in single protein sources a total of 16 protein sources was tested maintaining the limitation relations of the combination partners with regard to the additivity of the efficiencies of lysine, methionine/cystine and threonine. The results of the N metabolism measurements with a total of 60 famale pigs of the country breed type (30 .. 55 kg live weight) allow the conclusion that additive relations and thus suitable correction possibilities exist for the gross amino acid content through the amino acid efficiency for the calculation of requirement and requirement meeting. The N utilization model used (GEBHARDT 1963) is in its further development confirmed as the basis of amino acid efficiency.