reproductive performance of friesian-holstein cows at sebele research station in south eastern botswana
نویسندگان
چکیده
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
منابع مشابه
Reproductive Performance of Friesian-Holstein Cows at Sebele Research Station in South Eastern Botswana
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, aft...
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عنوان ژورنال:
iranian journal of applied animal scienceناشر: islamic azad university - rasht branch
ISSN 2251-628X
دوره 5
شماره 4 2015
میزبانی شده توسط پلتفرم ابری doprax.com
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