Disposal and disease rates in 340 British dairy herds.
作者： D. A. Whitaker , J. M. Kelly , S. Smith
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摘要: Data derived from 340 dairy herds, mainly in southern England, between April 1998 and March 1999, showed that the average total culling rate was 22.1 per cent, with 5.6 cent for infertility, 3.6 mastitis, 1.7 lameness, 2.0 poor milk yield, 3.7 age 5.5 miscellaneous reasons which included death. The annual of assisted calvings 8.7 injury 0.9 digestive disease 1.3 ketosis 0.4 hypomagnesaemia 0.7 hypocalcaemia 5.3 mastitis 36.6 lameness 23.7 cent. There a significant association (P<0.001) higher rates cows housed straw yards as opposed to cubicles also (P<0.015). However, there were farms low kept cubicles. Larger herds tended have more problems bulk somatic cell counts (BMscc). positive BMScc rate.
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