2006•Al-mağallaẗ al-ʻirāqiyyaẗ li-l-ʻulūm al-bayṭariyyaẗ/Iraqi journal of veterinary sciencesOpen access
The effect of methionine supplementation to diets free of animal protein on broiler performance
N. A. Katab, A. S. Al‐Saigh, T.A. Az-Aldeen
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Abstract
The effect of methionine supplementation on growth performance of 180 briolers type (Cobb) during growing period (1-21) days, fattening period (22- 42) days and the entire rearing period (1- 42) day, and carcass traits were examined. Three levels of methionine (0.10, 0.15 and 0.20%) were supplemented to corn- soybean diet and compared with a normal diet (as control), for broiler feeding. Increasing methionine supplementation levels significantly improved weight gain and feed conversion efficiency, particularly at (0.15 and 0.20%) levels. Feed intakes were not significantly different among treatment groups. Carcass yield and breast yield increased at (0.15 and 0.20%) levels of methionine addition (P