Teagasc, Animal and Grassland Research and Innovation Centre, Moorepark, Fermoy, Co. Cork, Ireland P61 C996; Animal Production Systems group, Department of Animal Sciences, Wageningen University & Research, 6700 AH, Wageningen, the Netherlands.
Animal Production Systems group, Department of Animal Sciences, Wageningen University & Research, 6700 AH, Wageningen, the Netherlands.
J Dairy Sci. 2020 Oct;103(10):9238-9249. doi: 10.3168/jds.2019-17103. Epub 2020 Aug 6.
Lameness in dairy cows can have significant effects on cow welfare, farm profitability, and the environment. To determine the economic and environmental consequences of lameness, we first need to quantify its effect on performance. The objective of this study, therefore, was to determine the associations of various production and reproductive performance measurements (including milk, fat, and protein yield, somatic cell count, calving interval, cow death, or cow slaughter), and mobility scores in spring-calving, pasture-based dairy cows. We collected mobility scores (0 = good, 1 = imperfect, 2 = impaired, and 3 = severely impaired mobility), body condition scores, and production data for 11,116 cows from 68 pasture-based dairy herds. Linear mixed modeling was used to determine the associations between specific mobility scores and milk, fat and protein yield, and somatic cell count and calving interval. Binomial logistic regression was used to determine the association between mobility score and cow death, or slaughter. Significant yield losses of up to 1.4% of the average yield were associated with mobility score 2 and yield losses of up to 4.7% were associated with mobility score 3 during the early scoring period. Elevated somatic cell count was associated with all levels of suboptimal mobility during the late scoring period. Cows with a mobility score of 2 during the early scoring period were associated with longer calving interval length, whereas only cows with a mobility score of 3 during the late scoring period were associated with longer calving interval length. Cows with a mobility score ≥1 were more likely to be culled during both scoring periods. Our study, therefore, shows an association between specific mobility scores and production and reproductive performance in spring-calving, pasture-based dairy cows scored during the summer grazing period.
奶牛跛行会对奶牛福利、农场盈利能力和环境产生重大影响。为了确定跛行的经济和环境后果，我们首先需要量化其对性能的影响。因此，本研究的目的是确定各种生产和繁殖性能测量（包括牛奶、脂肪和蛋白质产量、体细胞计数、产犊间隔、奶牛死亡或奶牛屠宰）与春季产犊、牧场奶牛的移动评分之间的关联。我们收集了移动评分（0=良好、1=不完全、2=受损、3=严重受损的移动性）、身体状况评分和来自 68 个牧场奶牛场的 11116 头奶牛的生产数据。线性混合模型用于确定特定移动评分与牛奶、脂肪和蛋白质产量以及体细胞计数和产犊间隔之间的关联。二项逻辑回归用于确定移动评分与奶牛死亡或屠宰之间的关联。在早期评分期间，与移动评分 2 相关的产量损失高达平均产量的 1.4%，与移动评分 3 相关的产量损失高达 4.7%。在晚期评分期间，体细胞计数升高与所有水平的次优移动性都相关。在早期评分期间移动评分 2 的奶牛与产犊间隔长度较长相关，而只有在晚期评分期间移动评分 3 的奶牛与产犊间隔长度较长相关。在两个评分期间，移动评分≥1 的奶牛更有可能被淘汰。因此，我们的研究表明，在夏季放牧期间对春季产犊、牧场奶牛进行评分时，特定的移动评分与生产和繁殖性能之间存在关联。
