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|Advisor:||Dr. DAIDA KRISHNA|
|Title:||EFFECT OF DIETARY INCLUSION OF NANO ZINC OXIDE IN COMMERCIAL BROILERS|
|Abstract:||Zinc is a nutritionally essential trace mineral in poultry rations. Broiler chicken need regular supply of zinc from extraneous sources, as it is not stored in the body. In view of the recent development in mineral nutrition of livestock and poultry for increasing their production performance through supplementation of dietary minerals in nano forms, a study was conducted in broiler poultry to evaluate the effect of supplementation of zinc in the diet in the form of nano zinc oxide (nano ZnO) on growth performance, feed consumption, meat and blood parameters. A total of two hundred and forty day old commercial broiler chicks were randomly divided to six dietary treatments with eight replications of 5 birds each (6×8×5) and reared in battery brooder up to 42 days of age. Broilers were fed with corn-soya based basal diet supplemented with different levels of nano ZnO (0, 2.5, 5, 10, 20 ppm in groups 1,2,3,4,and 5 respectively) and inorganic ZnO (40ppm; group 6) for a period of 42 days. On day 42, blood sample from one representative bird from each replicate was taken and then the birds were slaughtered for carcass evaluation. The results showed that body weight gain in birds supplemented with nano ZnO @ 2.5 ppm was significantly (P<0.05) higher (2482.28g) followed by groups supplemented with 5 & 10 ppm. Cumulative fed intake in 42 days was also significantly (P<0.05) higher in the group supplemented with 2.5 ppm nano ZnO (4191g) when compared to other groups. As a result, better feed conversion ratio (feed/ weight gain) of 1.693 was seen (P>0.05) in the groups supplemented with 2.5 ppm nano ZnO. The evaluation of carcass parameters showed that the dressing percentage (ready to cook yield) ranged between 68.87 to 70.76 and was not affected by the dietary treatments. Weights of heart, liver, gizzard, abdominal fat and breast yield were comparable between the groups. Immune organs weights and concentration of serum protein & cholesterol were not affected due to treatments. There was no significant difference (P>0.05) in meat quality parameters (water holding capacity & pH) of broiler chicken at 42 days of age with or without supplementation of nano ZnO at different levels. The mortality was within limits in all dietary treatment groups. From the results, it is inferred that supplementing zinc in the broiler poultry diets in the form of nano ZnO at 2.5 ppm improved the body weight and feed efficiency.|
|Appears in Collections:||Thesis|
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