Abstract
The present experiment was conducted to assess the efficacy of methionine hydroxy analogue free fatty acid (MHA- FA) in comparison to DL-methionine (DL-Met) utilizing day-old commercial broiler chicks (n=300). The chicks were randomly distributed into 30 groups of 10 chicks each. Three dietary treatments, viz. D1-maize-soybean meal based basal diet (Control), D2- control diet supplemented with DL- methionine to meet its requirements and D3-control supplemented with MHA-FA @ 1.54 times of DL-methionine used in D2, were formulated. Each dietary treatment was offered to 10 replicated groups of chicks following completely random design (CRD). The chicks fed on supplemental DL-Met had significantly higher (p 0.05) amongst the treatments. The eviscerated yields emanated from diets with DL-Met or MHA-FA were higher (p<0.01) than that in Control. Abdominal fat pad was also more (p<0.01) in broilers fed control diet than in DL-Met or MHA-FA supplemented group. Breast yield was higher (p<0.05) in MHA-FA fed broilers than those fed DL-methionine supplemented or un-supplemented diets. The efficacy of MHA-FA in comparison to DL-Met for growth was 62.11, 64.82 and 63.88% and for feed efficiency was 62.98, 67.73 and 64.01% at 0-3, 3-6 and 0-6 weeks of age, respectively, while it was 65.85, 71.40 and 67.49% for eviscerated yield, abdominal fat pad reduction and breast yield at 6 weeks of age, respectively. (Asian-Aust. J. Anim. Sci. 2004. Vol 17, No. 1 : 102-108)
Highlights
Groundnut meal and fish meal have been used as major protein supplements in India
The diets were D1 (Control, maize-soya based basal diet without methionine supplementation), D2, D3
Carcass traits recorded, were expressed in terms of The data of 0-3 weeks period revealed that broiler chickens percentage of live weight
Summary
Groundnut meal and fish meal have been used as major protein supplements in India. Because of the problems of mycotoxins and inferior protein quality of groundnut meal and non availability of quality fish meal, use of these ingredients has been limited. Soybean meal is being used as a major protein supplement in poultry diet along with cereal maize. The production of soybean meal has increased in India in recent past. The amino acid methionine is the most limiting one in maize-soybean meal based diet. Supplementation with limiting amino acids allows the level of protein-rich feedstuffs to be reduced, while maintaining performance, and help reduce nitrogen excretion through its better utilization for protein synthesis
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