The influence of different levels and sources of copper on some blood parameters in Iranian fat-tail lambs
2011
Dezfoulian, A.H. | Aliarabi, H. | Tabatabaei, M.M. | Bahari, A. | Zamani, P. | Alipour, D.
The experiment was conducted to determine the effects of different levels and sources of copper (Cu) supplementation on serum ceruloplasmin (Cp) concentration and hematological values in Iranian fat-tail lambs. Twenty Iranian Mehraban male lambs (5-6 months of age; average BW = 30.53 +/- 3.04 kg) were housed in individual pens and randomly assigned to 4 different treatment groups in a 2x2 factorial experiment on a completely randomized design. Treatment groups consisted of 10 mg Cu/d in the form of CuSO4, 20 mg Cu/d in the form of CuSO4, 10 mg Cu/d in the form of Cu-Proteinate and 20 mg Cu/d in the form of Cu-Proteinate. Cu supplements were administered daily at morning feedings. Animals were fed twice a day with a diet consisting of 70% grain, 27% alfalfa hay and 3% soybean meal based on dry matter intake (DMI). Diet was adjusted to meet all nutrient requirements according to NRC (NRC, 1985). Blood samples were collected on days 0,7,14,18,57,65 and 84 in two tubes, one heparinized and the other without an anti coagulating substance then transferred to the veterinary laboratory where 1cc of whole blood samples were taken and sent to analysis lab for hematological analysis. Serum samples were also obtained via centrifuging un-heparinized blood at 3000rpm for 15 minutes. Whole blood samples were analyzed for hemoglobin (Hb), red blood cell count (RBC), mean cell hemoglobin (MCH), mean cell hemoglobin concentration (MCHC), mean cell volume (MCV), packed cell volume (PCV) and red cell distribution width (RDW). Serum samples were analyzed for CP concentration. Statistical analysis showed no difference between animals at d 0. The source of copper had a significant effect on serum Cp concentration, with proteinate leading to higher Cp values than sulfate (P is less than 0.01). Sheep which received 20ppm of copper (regardless of the source) had higher PCV and Hb values (P is less than 0.01). Treatment No.4 had the highest Cp, PCV and Hb values. These results suggest that organic Cu supplement may be a more suitable source of Cu for sheep.
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