Reproductive Performance of Friesian-Holstein Cows at Sebele Research Station in South Eastern Botswana

نویسندگان

  • O.R. Madibela Department of Animal Science and Production, Botswana College of Agriculture, Gaborone, Botswana
  • W. Mahabile Department of Agricultural Research, Sebele Research Station, Gaborone, Botswana
چکیده مقاله:

Retrospective data from Sebele Dairy Farm were analysed for reproductive performance of Friesian/Holstein cows. Three hundred records from 1989 to 1995 were used. The herd was zero grazed and the data was analysed for age at first calving (AFC), calf birth weights (BW), calving interval (CI), days open (DO), calving rate (CR), reproductive wastage (RW) and calving difficulty (CD); dystocia, after-birth retention and misrepresentation of foetus) and calving weights (CW). The effects of year of calving (YOC) and year of birth (YOB) were tested. The year of calving affected age at first calving (P

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عنوان ژورنال

دوره 5  شماره 4

صفحات  799- 805

تاریخ انتشار 2015-12-01

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