PT  - JOURNAL ARTICLE
AU  - Richter, Michal
AU  - Třináctý, Jiří
AU  - Křížová, Ludmila
TI  - Comparison of actual and predicted amino acid contents in the duodenal digesta of dairy cows
DP  - 2014 Aug 6
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 313--320
VI  - 58
IP  - 5
AID - 10.11118/actaun201058050313
IS  - 12118516
AB  - In this experiment on three dairy cows with the ruminal and duodenal T-cannulas, the actual and predicted amino acid (AA) profiles of the protein fraction flowed to the small intestine were compared. The prediction was calculated by two methods: with the use of mean published AA profile of microbial protein and of experimentally determined one. The actual AA profile of digesta protein was corrected for glycine (Gly) of bile origin. In comparison to the published AA profile of microbial protein the use of the actual one did not contribute to an improvement of prediction accuracy (mean prediction error: 7.36 vs. 7.54 %, respectively). Inaccurate determination of AA composition of undegraded feed protein and the insufficient correction for Gly of bile origin were the probable sources of the residual variability.