Abstract
Ketosis data from the Health Card System, and interview data regarding feeding, housing, management and care were the basis for an epidemiological study in 306 Norwegian dairy herds.
Management and care were studied by means of an overall care index. The index was based on 20 questions which provided information about the general standard of management and care. Care was the factor having the most pronounced effect on the treatment rate of ketosis. Highest rates were seen in herds with a high standard of management and care, and lowest rates were seen in herds with a low standard.
Most ketosis was found in the mountain valley districts Nord-Østerdal/Gudbrandsdal and Valdres, and least in the lowland coastal district Rogaland. The treatment rate decreased with increasing herd size, and with increasing number of different feedstuffs used. Extra provision of feed concentrates between the morning and evening chores was associated with a lower treatment rate. Also associated with a lower treatment rate was the participation by the farmer’s wife in the daily chores.
Keywords: disease recording, feeding, management and care, dairy cattle
Sammendrag
Ketosedata på grunnlag av helsekortstatistikken, sammen med intervjudata vedr. fóring, oppstallingsforhold og stell var grunnlaget for en epidemiologisk undersøkelse over faktorer med innvirkning på ketoseforekomsten i 306 besetninger.
Effekten av stellet ble studert ved hjelp av en faktor som ble kalt omsorg. Faktoren ble definert på grunnlag av 20 spørsmål som ga informasjon om kvaliteten av stellet. Omsorg var den enkeltfaktoren som hadde sterkest innvirkning på ketoseforekomsten. Den registrerte behandlingsraten var høyest i besetninger med godt stell, og lavest i besetninger med dårlig stell.
Det ble funnet mest ketose i fjellbygdene Nord-Østerdal/Gudbrandsdal og Valdres, og minst i Rogaland. Videre ble det funnet at behandlingsraten avtok med økende besetningsstørrelse, og med økende an tall fórslag i forrasjonen. Det var mindre ketose i besetninger hvor det ble gitt ekstra kraftfór mellom morgen- og kveldsstellet. Det samme var tilfelle der hvor kona deltok i fjøsstellet.
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Footnotes
* The study was financially supported by funds from the Norwegian Agricultural Research Council.
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