Comparative Studies on the Reproductive Efficiency of Imported and Local Born Friesian Cows in Pakistan
Abstract:
Reproductive efficiency
is the measure of the ability of a cow to become pregnant and produce
viable offsprings. The comparative reproductive efficiency of 50 each
imported and local born Friesian cows at Bhunikey (Pattoki), Harichand
(Charsada) and Quetta (Baluchistan) was studied. It was concluded that
age at first calving differed significantly at different locations (P<0.05)
for imported and local born cows. The services per conception at Bhunikey
and Quetta did not differ significantly for imported and local born but these differed significantly
from imported and local born of Harichand. The service period of imported
and local born cows at Bhunikey was significantly longer (P<0.05)
than cows at Harichand and Quetta did not vary significantly in imported
and local born except Harichand. There was no significant difference
in milk yield of imported and local born cows at Quetta. However, at
Bhunikey and Harichand, imported
cows produced significantly (P<0.05) more milk than their progeny
and all these classes produced significantly more milk than imported
and local born at Quetta.Calving interval of imported and local born
cows at Bhunikey was significantly longer (P<0.05) than the Harichand
and Quetta but did not differ significantly for imported and local born
cows. Mean dry period for imported and local born at Bhunikey is significantly
(P<0.05) longer than that of Harichand and Quetta, but there was
no significant difference between the imported and local born at different
locations.
How to cite this article
Amir Ahmed Khan Niazi and M.Aleem , 2003. Comparative Studies on the Reproductive Efficiency of Imported and Local Born Friesian Cows in Pakistan. Journal of Biological Sciences, 3: 388-395.
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