A. Bateman
Not Available
Z. Liu
Not Available
M.M. Bryant
Not Available
G. Wu
Not Available
D.A. Roland Sr.
Not Available
ABSTRACT
Two studies were conducted to compare bioefficacy of liquid DL-methionine hydroxy analogue-free acid (MHA-FA) and DL-methionine (DL-Met). Biological efficacy was determined for egg production, feed consumption, egg mass, and egg weight using linear and nonlinear regression models. In Experiment 1, five levels of DL-Met (0.023, 0.045, 0.068, 0.090 and 0.113%) and MHA-FA (0.026, 0.051, 0.077, 0.102 and 0.128%) were added on an equimolar basis to a basal diet containing 14.97% protein and 0.27% Met. This trial used 1,760 first cycle, Phase II Hy-Line W-36 hens. There was no response above the basal diet in any of the criteria measured, so regression analysis was not performed. In Experiment 2, five levels of DL-Met (0.012, 0.024, 0.036, 0.048 and 0.060%) and MHA-FA (0.014, 0.027, 0.041, 0.054 and 0.068%) were added on an equimolar basis to the basal diet used in Experiment 1. This trial used 1,760 second cycle, Phase I Hy-Line W-36 hens. The average bioefficacy of MHA-FA related to DL-Met was 82.45% on a weight basis (or 93.70% on a molar basis) based on egg production, was 89.23% on a weight basis (or 101.40% on a molar basis) based on egg mass, and was 106.29% on a weight basis (or 120.79% on a molar basis) based on egg weight, more research is needed to improve accuracy of bioefficacy values.
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How to cite this article
A. Bateman, Z. Liu, M.M. Bryant, G. Wu and D.A. Roland Sr., 2005. Explanation on How to Interpret Properly the Bioefficacy of Methionine
Hydroxy Analog-Free Acid Relative to Dl-Methionine Estimated by Regression Models in Laying Hens. International Journal of Poultry Science, 4: 280-285.
DOI: 10.3923/ijps.2005.280.285
URL: https://scialert.net/abstract/?doi=ijps.2005.280.285
DOI: 10.3923/ijps.2005.280.285
URL: https://scialert.net/abstract/?doi=ijps.2005.280.285