1- Department of Animal Science University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran.
2- Department of Animal and Poultry Sciences, Aburaihan Campus, University of Tehran, Pakdasht, Iran.
2- Department of Animal and Poultry Sciences, Aburaihan Campus, University of Tehran, Pakdasht, Iran.
Abstract: (11 Views)
The effect of addition milk-soluble zinc element on the blood and metabolic status of Holstein calves, Using 30 calves in a completely randomized design with 3 types of diets were: 1) a basal diet (containing 53.29 mg/kg of Zn DM), 2) a basal diet+milk containing 20 mg/kg of Zn DM as oxide, and 3) a basal diet+milk containing 40 mg/kg of Zn DM as sulfate, and 10 replications were evaluated. Body weight and Feed intake in calves fed basal diet with milk containing 40 mg/kg of Zn DM as sulfate was higher than calves fed basal diet without Zn supplement at 31 days old (P<0.05). Height, hip width, Chest girth, length and feces score in calves basal diet with milk containing 40 mg/kg of Zn DM as sulfate was higher than calves fed basal diet without Zn supplement at 31 days old (P<0.05). Alkaline phosphatase was higher in calves fed a basal diet+milk containing 20 mg/kg of Zn DM as oxide than in calves fed a basal diet+milk containing 40 mg/kg of Zn DM as sulfate (P<0.05). According to the results of this experiment, the use of basal diet with milk containing 40 mg/kg of Zn DM as sulfate based on the need in the milk of Holstein calves will improve body weight and feed intake and fecal score, this has led to an increase and improvement in skeletal growth and health parameters. By understanding the factors affecting serum alkaline phosphatase enzyme activity due to the use of a a basal diet+milk containing 20 mg/kg of Zn DM as oxide in Holstein suckling calves, it is possible to more effectively measure the activity of this enzyme for diagnosing diseases. Therefore, the use of a basal diet with milk containing 40 mg/kg of Zn DM as sulfate of calves is recommended to improve the metabolic status of the animal.
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