Study of Effect of Copper and Zinc Supplementation on Production Performance of Kankrej Cattle
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Date
2017
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Rajasthan University of Veterinary and Animal Sciences, Bikaner
Abstract
The objectives of the present investigation were to study the effect of
supplementation of Copper, Zinc and combination in production performance,
health status and immunity in transition period of Kankrej cows. Twenty
pregnant Kankrej cows at 30 days before the expected date of calving were
selected and grouped into 4 homogenous groups of 5 each as control,
supplemented Copper, supplemented Zinc and supplemented combination.
Control group fed normal basal diet.
Milk samples were collected at day 7th, 15th, 30th, 45th post partum from
individual animals of each group. These milk samples were used to analysis
of SCC, milk fat, milk SNF, milk lactose, milk protein and milk total solid. Blood sample was collected day of 30th, 15th at pre partum, at day of calving and day of 15th, 30th, 45th at post partum to study neutrophils percentage and
total leukocyte count in blood. The SCC were observed significantly (P≤0.01) higher in day-7th and lower SCC in day 45th of lactation of all the cows. The
lowest SCC in milk was found in combination group followed by Zinc, Copper
and control group and they were significantly higher in control group. It
indicate that micronutrient supplementation improve udder health by reducing
SCC, and decreasing the incidence of Mastitis.
Maximum milk fat, milk lactose and milk protein percentages were
observed in combination followed by Zinc, Copper and control group. Similarly
maximum milk SNF and total solid percentage were observed in Zinc
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supplementation group followed by Copper, combination and control group
respectively. Highest daily milk yield was increased after supplementation of
micronutrient due to reduction of incidence of Mastitis. Highest yield was
found in combination group and statistically significant differences were
observed among treatments.
Calves body weight was found highest in dam supplemented with
combination of Cu and Zn which revealed effect of Copper and Zinc on body
weight of calves when it fed to pregnant cows. The highest value of
neutrophils percentage in colostrums was estimated in control as compare to
other group.
Copper and Zinc improve immunity of an animal because minimum
increase was observed in combination supplemented cows in total leukocytes
count and neutrophils percentage in blood. There was no significant
difference on overall total leukocyte count of blood in Copper and Zinc
supplementation.
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