Jones G M, Wildman E E, Troutt H F, Lesch T N, Wagner P E, Boman R L, Lanning N M
J Dairy Sci. 1982 Apr;65(4):683-8. doi: 10.3168/jds.S0022-0302(82)82251-0.
This study examined metabolic profiles of commercial dairy herds differing in milk production. Thirty herds were selected with 10 herds averaging more than 7258 kg milk, 10 herds between 6350 and 7258 kg, and 10 herds averaged below 6350 kg. In each herd, 28 cows were selected for blood sampling, which was collected every 3 mo during 12 mo. Cows varied in estimated relative producing ability. Metabolic profiles were established for 19 blood components. Differences among treatment means were significant between high and low producing herds and little between profiles for milking and pregnant nonlactating cows. Metabolic profiles of problem herds remained within normal ranges for all herds except one. Profiles of herds with breeding or mastitis problems remained in the normal range. Metabolic profile testing was of limited value in screening a dairy herd for potential problems or deficiencies.
本研究调查了产奶量不同的商业化奶牛群的代谢特征。选取了30个牛群，其中10个牛群平均产奶量超过7258千克，10个牛群产奶量在6350至7258千克之间，10个牛群平均产奶量低于6350千克。在每个牛群中，选取28头奶牛进行采血，在12个月期间每3个月采集一次。奶牛的估计相对生产能力各不相同。测定了19种血液成分的代谢特征。高产和低产牛群之间处理均值存在显著差异，而泌乳奶牛和怀孕非泌乳奶牛的代谢特征差异不大。除一个牛群外，所有牛群中问题牛群的代谢特征均保持在正常范围内。有繁殖或乳腺炎问题的牛群的代谢特征仍在正常范围内。代谢特征检测在筛查奶牛群潜在问题或缺陷方面价值有限。
