Aims: This study investigates the out-turn of Chromium Propionate (CrProp) and vitamin E dietary supplementation on broiler chickens' performance characteristics and haematological indices.Study Design: The completely randomised design was used for this study.Methodology: Six hundred-and forty-day-old Cobb 500 broiler chickens were randomly assigned to eight dietary treatments (10 birds/replicate). A basal diet was fractionated into eight equal parts and labelled diets 1 to 8. Diets 1 to 4 were supplemented with 0, 0.4, 0.8 and 1.2 mg/kg CrProp, respectively. The diets 5 to 8 were supplemented with 200 mg/kg vitamin E; 0.4 mg CrProp+200 mg vitamin C; 0.8 mg CrPro+200 mg vitamin E and 1.2 mg CrPro+200 mg Vitamin E, respectively.Results: The final body weight (FBW) of the birds fed diets 2, 3, 4,7 and 8 were significantly (P<0.05) higher than those fed the control diet and diet 5 and 6, and total weight gain (TWG) of the birds fed diets 2,4,7and 8 were significantly (P<0.05) higher than those fed the control and diet 3,5,6. The CrProp supplementation at 0.4, 0.8 and 1.2 mg/kg levels improved (P<0.05) the FBW, and supplementation at 0.4 and 1.2mg/kg levels improved (P<0.05) the TWG of the birds, compared to the control. The vitamin E supplementation (200mg/kg) does not improve (P>0.05) the FBW and TWG of the birds. The haematological indices showed a significant difference (P<0.05) across the diets. However, supplementation of CrProp at 0.8mg/kg affects MCV, WBC, Heterocyte and lymphocyte count, whileat 1.2mg/kg, the MCHC value was significantly affected. Including vitamin E at 200mg/kg improves the MCV and MCH. The combination of CrProp at 0.4mg/kg and 200mg/kg vitamin E increased(P<0.05) heterocyte count, while supplementation at 0.8mg/kg and 200mg/kg vitamin E improves WBC and lymphocyte counts. The packed cell volume improved significantly by CrProp supplementation at 1.2mg/kg and 200mg/kg vitamin E. Conclusion: The growth of the broiler chicken is enhanced by 1.2 mg/kg CrProp, 200 mg/kg vitamin E and a combination of CrPropand vitamin E dietary supplementations with significant changes in haematological indices of the birds.
This study evaluated the effects of chromium picolinate (CrPic) with or without vitamin C on the reproductive potentials of cocks raised under high ambient temperature. Four diets contained CrPic at 0.00 to 1.20 mg kg-1 without vitamin C and another four diets contained CrPic with 200 mg vitamin C each. A total of 192 White Leghorn and Noiler cocks (96 cocks each) were randomly assigned to the 8 treatments and replicated 4 times with 6 cocks per replicate in a 2 x2 x 4 factorial experiment. At the end of the sixteen weeks study, twelve birds per treatment were randomly sacrificed. The testes were carefully sampled, weighed and processed for estimation of daily sperm production using the homogenate method. The results revealed that the interactions of 0.40 mg CrPic kg-1 with or without vitamin C significantly (p < 0.05) influenced the gonadal and extra-gonadal weights, semen characteristics among the cocks while the daily sperm production and reproductive hormones were not negatively affected. This study, therefore, concluded that 0.40 mg CrPic kg-1 diet with vitamin C could significantly reduce the effects of heat stress on cocks raised under high ambient temperature without negatively impacting on their normal reproductive functions.
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