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Article: Milk Protein Synthesis as a Function of Amino Acid Supply*
- Article from:
- Journal of Dairy Science
- Article date:
- May 1, 2004
- Author:
CopyrightCopyright American Dairy Science Association May 2004. Provided by ProQuest LLC. (Hide copyright information)
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ABSTRACT
Most prediction schemes of milk protein secretion overestimate milk protein yield from dairy cows at high protein intakes, thereby overestimating milk protein yield response to protein supplementation. This study was conducted to determine factors contributing to such an overestimation. Using published studies, a database was constructed that was limited to amino acid (AA) infusion studies, as then only the digestible amino acid of dietary origin needed to be estimated, whereas the amount infused was known exactly, thereby reducing the dependence on estimated values.
Although milk protein yield was positively related with total energy supply, and both digestible duodenal supply and ...