O.M. El - Husseiny
Department of Animal Production, Faculty of Agriculture, Cairo University, Cairo, Egypt
A.Z. Soliman
Department of Animal Production, Faculty of Agriculture, Cairo University, Cairo, Egypt
I.I. Omara
Department of Animal Production, Faculty of Agriculture, Cairo University, Cairo, Egypt
H.M.R. El - Sherif
Department of Animal Production, Faculty of Agriculture, Cairo University, Cairo, Egypt
ABSTRACT
An experiment conducted to examine the effect of methionine (M), folic acid (F) and vitamin B12 and their interactions on Bovans White laying hen performance, egg quality, nutrient digestabilities and relative economic efficiency (REE) from 28 to 43 weeks of age. The experiment was conducted in a 3 x 3 x 2 factorial arrangement of treatments, three levels of M (0.40, 0.45 and 0.50%), three levels of F (6.0, 9.0 and 12.0 mg/kg) and two levels of B12 (0.01 and 0.02 mg/kg) were used. 0.45% M, 0.50 mg F/kg and 0.01 mg B12/kg considered as a control. The results indicated that layers fed high level of M gave the best egg production (EP), the least feed consumption (FC) compared with either medium or low M levels with no significant differences. Layers fed high level of M recorded high egg weight (EW) and improved feed conversion ratio (FCR) compared with either medium or low M levels with significant differences (p ≤ 0.05). The interactions of M x F x B12 had significant effect on egg shell percentage (ESP), egg content percentage (ECP) and blood hemoglobin (BH), with no significant effect on EP, FC, FCR and egg shell thickness (ST). The interaction of high level of M with F and B12 supplementation gave the best performance and REE compared with either medium or low M levels. It could be concluded that feeding diet at 0.50% M with supplemented F and B12 (12.0 and 0.02 mg/kg, respectively) gave the best performance and REE.
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How to cite this article
O.M. El - Husseiny, A.Z. Soliman, I.I. Omara and H.M.R. El - Sherif, 2008. Evaluation of Dietary Methionine, Folic Acid and
Cyanocobalamin (B12) and Their Interactions in Laying Hen Performance. International Journal of Poultry Science, 7: 461-469.
DOI: 10.3923/ijps.2008.461.469
URL: https://scialert.net/abstract/?doi=ijps.2008.461.469
DOI: 10.3923/ijps.2008.461.469
URL: https://scialert.net/abstract/?doi=ijps.2008.461.469