Management, feeding, production, reproduction and udder health on organic and conventional Swiss dairy farms
2006
Roesch, M. (Universitaet Bern, Bern (Switzerland). Institut fuer Genetik, Ernaehrung und Haltung von Haustieren) | Doherr, M.G. | Blum, J.W.
Organic dairy farms (OPn=60) and conventional dairy farms (integrated production, IPn=60), matched in size, location, and agricultural zone (altitude), were studied for possible differences in management, feeding, production, reproduction and udder health. OP and IP farms were similar in size (17.7 and 16.9 ha), milk quota (65900 and 70000 kg/year), cow number (14 and 15), cow age (5.3 and 5.2 years), housing of cows of the Simmental × Red Holstein or Holstein breeds (87 and 75%45 and 60%), but differed significantly with respect to loose housing systems (18 and 7%), outside paddocks (98 and 75%), energy-corrected 305-d milk yield (5695 and 6059 kg), milk protein content (31.8 and 32.7 g/kg), use of bucket milking systems (73 and 33%), observance of regular (12-h) milking intervals (47 and 68%), routine application of the California-Mastitis-Test (10 and 28%), teat dipping after milking (25 and 43%) and blanket dry cow treatments (0 and 45%). Milk somatic cell counts on OP and IP farms (119000 and 117000/mL) and reproduction data were similar and there were no significant differences between OP and IP farms as concerns available feeds, planning and management of feeding. Alternative veterinary treatments were used more often on OP than IP farms (55 and 17%). Main causes for cow replacements on OP and IP farms were fertility disorders (both 45%), age (40 and 42%), sale (30 and 37%) and udder health (35 and 13%). Between OP and IP Swiss dairy farms thus relatively few larger differences were found.
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