Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
International Journal of Poultry Science
Year: 2005  |  Volume: 4  |  Issue: 9  |  Page No.: 628 - 632

Bioefficacy Determination of Methionine Hydroxy Analog-Free Acid Relative to DL-Methionine in Laying Hen Diets with Limited Methionine Using Different Regression Models

Andrew Bateman, Zhenhua Liu and David A. Roland Sr.    

Abstract: A study was conducted to compare bioefficacy of liquid DL-methionine hydroxy analogue-free acid (MHA-FA) and DL-methionine (DL-Met) in laying hens. Biological efficacy was determined for egg production, egg mass, and egg weight using five regression models. Four levels of DL-Met (0.012, 0.024, 0.036, and 0.048%) and MHA-FA (0.014, 0.027, 0.041, and 0.054%) were added on an equimolar basis to a basal diet containing 14.97% protein and 0.27% methionine. Twenty week old Hy-Line W-36 hens were used in this trial with 8 replicates per treatment. The bioefficacy of MHA-FA related to DL-Met was 0.77 on a weight basis (or 0.87 on a molar basis) based on egg mass with the best goodness of model fit (average R2 equal to 83.33%). The bioefficacy was 0.71 on a weight basis (or 0.80 on a molar basis) based on egg production with the goodness of model fit at average R2 equal to 76.98%. The bioefficacy was 1.03 on a weight basis (or 1.17 on a molar basis) based on egg weight with the goodness of model fit at average R2 equal to 68.83%.

Cited References   |    Fulltext    |   Related Articles   |   Back
  Related Articles

Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility