Abstract
Aim:The present experiment was conducted to study the effect of post hatch dietary fat supplementation on performance of broiler chicken.Materials and Methods:A total of 120 day-old Ven Cobb broiler chicks were randomly assigned to 4 treatment groups of 30 chicks in each (three replicates of 10 birds/treatment). The trial lasted for 35 days. The experimental design was a completely randomized design. Four types of diet were formulated for 1st week: T1, T2, T3 and T4 contained control diet with no added fat, 2.5, 5 and 7.5% fat, respectively. After 1st week post-hatch period chicks were fed ad libitum with the normal basal diet as per Bureau of Indian Standard recommendations till completion of the experiment (8-35 days).Results:Significantly higher (p<0.05) body weight and improved feed conversion ratio (FCR) was recorded in birds fed 5% dietary fat at the end of the experiment whereas, feed intake was not significantly affected. Significantly (p<0.05) higher dressed weight was observed due to 5% fat supplementation than other groups whereas, it was not significant for other carcass cuts.No significant differences were observed in moisture, protein and lipid content of breast and thigh muscle of broiler due to supplemented fat whereas, 2.5% dietary fat significantly (p<0.05) increase the serum HI titer on day 28th.In biochemical profile, higher serum albumin (g/dl) was recorded due to 5% fat supplementation whereas other biochemical components did not show any significance difference among treatments.Conclusion:It may be concluded that supplementation of fat in broilers diet improves the overall FCR, dressing percentage and gain more body weight.
Highlights
In the developing poultry embryo, the sole energy source is yolk
No significant differences were observed in moisture, protein and lipid content of breast and thigh muscle of broiler due to supplemented fat whereas, 2.5% dietary fat significantly (p
It may be concluded that supplementation of fat in broilers diet improves the overall feed conversion ratio (FCR), dressing percentage and gain more body weight
Summary
Yolk is utilized in newly hatched chick either by direct transfer to circulation or by transport through the yolk stalk into the small intestine. Antiperistaltic movements transfer the yolk to the proximal part of the small intestine whereas, pancreatic lipase digest the acyl lipids. Oleic acid is highly absorbed close to hatch. Hydrophilic compounds such as glucose and amino acids are not well absorbed in yolk rich medium. Absorption of glucose and amino acids increases with age and with the development of hydrophilic conditions in the intestinal lumen [1]. During 1st week post hatch nutrient utilization is gradually increased. This stage of development is very crucial for modern broiler industry.
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