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| Fall, DVM Nils; Emanuelson, Professor Ulf; Martinsson, Kjell; Jonsson, Simon. |
| Our aim was to compare udder health in groups of organically and conventionally managed cows, using data from a longitudinal study in a Swedish dairy-research farm. Management of the groups was identical except for feed composition and the feeding regimen. Our dataset included all lactating cows calving from 1 September 1990 to 31 August 2001 (145 organically and 151 conventionally managed cows). Udder health was assessed by the geometric average somatic-cell count (SCC) within 150 days after calving, by the number of monthly SCC tests >200,000 cells/ml within 150 days after calving and by presence of lactations with veterinary-treated cases of clinical mastitis. The effect of animal group was analysed by multivariable linear, Poisson and... |
| Tipo: Journal paper |
Palavras-chave: Health and welfare. |
| Ano: 2008 |
URL: http://orgprints.org/13099/1/PVM%2C_Fall_et_al.%2C2008.pdf |
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