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Publisher: PVNR TVU
Language: en
Type: Thesis
Pages: 127
Agrotags: null
Abstract: This study was conducted to evaluate the effect of graded levels of chebula (Terminalia chebula) extract in broiler diets on productive performance, slaughter variables and serum oxidative stress variables. Three hundred day old commercial male broiler chicks were randomly divided into six dietary treatments with ten replications of 5 birds each and reared in battery brooder up to 42 days of age. Broilers were fed on corn-soy based broiler pre-starter (0-2 weeks), starter (3-4 weeks) and finisher (5-6 weeks) diets. The positive control (PC) diet supplemented with vit-E @ 200mg/kg (VE 200), a negative control (NC) i.e. without vit-E supplementation, remaining 4 treatment diets were formulated by corn-soy diets with different levels of CE 160 GAE (488 mg/kg), 130 GAE (397 mg/kg), 100 GAE (305 mg/kg) and 70 GAE (213 mg/kg). At the end of 42nd day, the results showed that body weight gain (BWG) was not significantly influenced by various dietary treatment groups. Birds fed with CE130 concentration showed numerically highest BWG (1816g) compared to VE 200 group (1710) and negative control (NC) group (1779g). Supplementation of graded levels of chebula extract (CE) and VE 200 did not have any significant influence on feed consumption of broilers during prestarter, starter and finisher phases and during overall period (0-6 weeks). There is no significant improvement in the feed conversion ratio (feed intake/body weight gain) on supplementation of neither chebula extract at graded concentrations nor VE 200 during the experimental period except for 1st and 2nd week. The feed conversion ratio in birds fed with different concentrations of chebula extract i.e. CE 70, CE 100 and CE 130 was significantly (P<0.05) lower than VE200 supplemented group and cumulative FCR showed significant (P<0.05) difference in broilers under tropical summer season. There is no mortality observed in birds fed with CE 130 concentration and VE 200 group. Mortality was more in negative control group compared to other dietary treatment groups. However, mortality was within the limits and no specific disease encountered during the experimental period. The percent of ready to cook yield, abdominal fat and spleen on live weight were not influenced by the dietary treatments except for relative weight of bursa. Inclusion of neither chebula extract at different concentrations (CE160 and CE130) nor NC diet significantly (P < 0.05) affected the relative weight of bursa. Broilers fed with CE130 showed significantly (P < 0.05) higher weight of bursa compared to other dietary treatment groups. Dietary supplementation of graded levels of chebula extract significantly (P<0.05) increased the concentration of serum glutathione peroxidase (GSHPx), glutathione reductase (GSHRx), superoxide dismutase (SOD) and reduced the lipid peroxidation (LPO) values. Birds fed with CE130 level increased the concentrations of GSHRx and SOD levels compared to other groups. CE160 showed significantly (P < 0.05) reduced the lipid peroxidation compared to other groups and comparable to CE70 group. The total phenolic content of chebula extract was (327 mg GAE/g) and DPPH radical scavenging activities of chebula extract (62.5%) had no significant influence on the body weight gain, however significant (P < 0.05) increase was observed on the antioxidant response in broilers. Based on the results, it is concluded that fortification of neither chebula extract (CE) at graded concentrations nor VE200 group did not alter the feed conversion ratio (feed intake/body weight gain) in broilers during the experimental period except for week 1 and 2. However, significant (P < 0.05) difference was observed in cumulative FCR. Supplementation of graded levels of chebula extract (CE) has not significantly influenced the carcass weights except for relative weight of bursa. Further there is significant (P < 0.05) reduction in lipid peroxidation (LP) and increased activity of antioxidant enzymes glutahione peroxidase (GSHPx), glutathione reductase (GSHRx) and superoxide dismutase (SOD) was observed in broilers fed CE130 diet compared to those fed negative control (NC) group.
Subject: Poultry Science
Theme: VPS
These Type: M.V.Sc.
Issue Date: 2018-12-31
Appears in Collections:Thesis

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