Reproductive profile of Holsteins kept in Balochistan province of Pakistan-II
2008
Younas, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Livestock Management) | Bilal, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Livestock Management) | Babar, M.E. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Animal Production) | Yaqoob, M. | Iqbal, A.
This study was planned to explore the reproductive profile of the imported and farm-born Holsteins covering the parameters like age at first service (AFS), age at first calving (AFC), service period (SP), gestation period (GP), calving interval (CI) and dry period (DP) kept under the local conditions of Balochistan province of Pakistan. Effect of locations of dairy farms on various reproductive parameters was also explored. Overall average values for AFS were 315 to 986 d with an average of 660.42 plus minus 12.42, AFC 604 to 1299 d with an average of 944.08 plus minus 12.71 GP 275 to 299 d with an average of 280.62 plus minus 0.25, SP ranged from 29 to 886 d with an average of 240 plus minus 9.61, CI ranged from 301 to 922 d with an average of 451.10 plus minus 5.55 and DP averaged as 59.15 plus minus 20.61 d. The effect of year of calving, season of calving, age of the dam, sex of the calf, type of birth, calving number and location of the farm were studied and the results revealed that the year affected the AFS, AFC and SP (P less than 0.01); GP (P less than 0.05) but not the CI. No effect of season on AFS, AFC, SP and CI (P greater than 0.05) was observed except GP (P less than 0.05). The age of the dam affected the AFC, GP and SP (P less than 0.05) but not the CI. No effect of sex of the calves, type of birth and calving number on GP (P greater than 0.05) was observed. Location of the farm did exert effect on AFS, AFC (P less than 0.01), CI (P less than 0.05) but not on GP and SP (P less than 0.05).
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