Hultgren Jan, Manske Thomas, Bergsten Christer
Department of Animal Environment and Health, Section of Production Diseases, Swedish University of Agricultural Sciences, P.O. Box 234, SE-532 23 Skara, Sweden.
Prev Vet Med. 2004 Apr 16;62(4):233-51. doi: 10.1016/j.prevetmed.2004.01.002.
The association between sole ulcer found at routine claw trimming 2-6 months after calving and reproductive, health and productive traits in the same lactation, was investigated in an observational study of 2368 dairy cows in 102 Swedish herds. The data were analysed by mixed multivariable linear-, logistic- and Poisson-regression modelling at the cow level, accounting for clustering within herd. Associations were found between sole ulcer and first-service conception risk in the first study year (OR 0.59), calving interval (2% longer), treatment for anoestrus (OR 1.61), and 305-day milk yield (479 kg ECM higher). No associations could be shown between sole ulcer and first-service conception risk in the second study year, the number of services per conception, clinical mastitis, high milk somatic-cell counts or culling.
在一项对瑞典102个牛群中2368头奶牛的观察性研究中，调查了产犊后2至6个月常规修蹄时发现的蹄底溃疡与同一泌乳期繁殖、健康和生产性状之间的关联。数据在奶牛水平上通过混合多变量线性、逻辑和泊松回归模型进行分析，同时考虑到牛群内的聚类情况。在第一个研究年度，发现蹄底溃疡与首次输精受孕风险（比值比0.59）、产犊间隔（长2%）、乏情治疗（比值比1.61）以及305天产奶量（高出479千克能量校正乳）之间存在关联。在第二个研究年度，未发现蹄底溃疡与首次输精受孕风险、每次受孕输精次数、临床型乳房炎、高乳体细胞计数或淘汰之间存在关联。
