Reproductive performance of indigenous cows of Azad Kashmir [Pakistan]
2007
Kuthu, Z.H. (Livestock Development Research Centre, Muzaffarabad (Pakistan)) | Javed, K. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Livestock Production) | Ahmad, N. (University of Veterinary and Animal Sciences, Lahore (Pakistan). Dept. of Livestock Production)
Data on 197 breeding records of 60 indigenous (nondescript) cows maintained at Livestock Development Research Centre Raroo, Muzaffarabad, Azad Kashmir, Pakistan from 1989-1998 were analyzed to evaluate their performance with respect to some economically important reproductive traits. The least squares mean for age at first calving in present study was 1632.65 plus minus 54.52 days with a C.V 13.04%. The analysis of variance revealed a significant (P less than 0.05) effect of season and year of birth on age at first calving. The least squares mean for post partum oestrus interval was 145.42 plus minus 98.72 days with a C.V 89.43%. The analysis of variance revealed a non-significant effect of season and year of calving on post partum oestrus interval. The least squares mean for service period was 167.82 plus minus 95.99 days with a C.V 16.42%. There was a non-significant effect of season of calving on service period but the effect of year of calving was significant (P less than 0.01). The least squares mean for calving interval in present study was 471.26 plus minus 89.34 days with a C.V 23.84%. There was a non-significant effect of season of calving on calving interval, whereas the effect of year of calving was significant (P less than 0.01). Parity had a non-significant effect on post-partum oestrus interval, service period and calving interval in this study.
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Эту запись предоставил National Agricultural Research Centre