Reproductive performance of red Sindhi cattle under hot and humid environment of Balochistan province of Pakistan
2003
Mustafa, M.I. | Latif, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Livestock Management) | Bashir, M.K. | Ahmad, B.
The present study was conducted to investigate the reproductive performance of 179 Red Sindhi cows with 485 lactation records covering 19 years period from 1978 to 1997, kept at the Government Red Sindhi Cattle Farm, Hub Chowki, District Lasbela (Balochistan). The effects of different known factors like year of birth/calving, season of birth/calving and cow were studied. The least squares mean (LSM) for age at first service (AFS), age at first conception (AFCO) and age at first calving (AFC) were 1024.86 plus minus 27.54, 1043.02 plus minus 31.46 and 1346.55 plus minus 27.34 days, respectively, whereas the service period (SP), gestation period (GP), calving interval (C1) and number of services per conception (SPC) were 235.87 plus minus 14.05 days, 283.15 plus minus 0.64 days, 515.28 plus minus 13.84 days and 1.63 plus minus 0.07, respectively. Year of birth/calving significantly affected (P less than 0.01) all the traits. Studied, whereas the season of birth/calving significantly (P less than 0.01) affected the service period and calving interval. Service period, gestation period and calving interval differed significantly between cows. The effect of lactation number on gestation period and services per conception was investigated, which significantly (P less than 0.01) affected the services per conception but not the gestation period. The variation in the effects of different factors on the traits maybe due to different environmental conditions, managemental practices, feeding planes, housing systems and personal skill of labour engaged in farm operations.
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Эту запись предоставил National Agricultural Research Centre