The impact of clinical lameness on the milk yield of dairy cows
| Autor: | Laura E. Green, V. Hedges, Ynte H. Schukken, Roger Blowey, A.J. Packington |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Veterinary medicine
Yield (finance) Lameness Animal Cattle Diseases Milk yield Animal science Lactation Genetics Medicine Animals Dairy cattle business.industry Digital dermatitis food and beverages Repeated measures design Milk production medicine.disease United Kingdom Parity medicine.anatomical_structure Lameness Animal Science and Zoology Cattle Female business Food Science |
| Zdroj: | Journal of dairy science. 85(9) |
| ISSN: | 0022-0302 |
| Popis: | This paper investigates the impact of lameness on milk yield. The dataset includes approximately 8000 test-day milk yields from 900 cows on five farms in Gloucester, UK, collected over 18 mo from 1997 to 1999. The data were structured to account for repeated measures of test-day yield (1 to 10 per cow) and analyzed to account for this autocorrelation. Factors affecting milk yield included: farm of origin, stage of lactation, parity, and whether a cow ever became lame. In clinically lame cows, milk yield was reduced from up to 4 mo before a case of lameness was diagnosed and treated and for the 5 mo after treatment. The total mean estimated reduction in milk yield per 305-d lactation was approximately 360 kg. We conclude that clinical lameness has a significant impact on milk production. This is important information for assessing the economic impact of clinical lameness and its impact on cow health. It adds weight to the importance of early identification of clinical lameness and the urgency of techniques to improve the definition of this highly subjective diagnosis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|