Lingaas F, Tveit B
Department of Animal Genetics, Norwegian College of Veterinary Medicine, Oslo.
J Dairy Sci. 1992 Sep;75(9):2433-9. doi: 10.3168/jds.S0022-0302(92)78004-7.
A feeding experiment was performed on 16 cows in order to test the effect of naturally occurring substances in silage on forage intake, ketonemia, and milk yield. The cows were divided into a control group and three experimental groups. The cows in the three experimental groups were fed 100 g/d of putrescine, 200 g/d of valeric acid, or 200 g/d of butyric acid through a ruminal tube for 3 d. Butyric acid increased plasma acetoacetate; the effect was largest in high yielding cows. Putrescine influenced both milk yield and forage intake and may possibly be a contributory factor, alone or combined with other amines, for the development of ketonemia. Valeric acid did not influence feed intake or plasma acetoacetate concentration. A rapid method for acetoacetate analysis also is described.
为了测试青贮饲料中天然存在的物质对采食量、酮血症和产奶量的影响，对16头奶牛进行了饲养试验。奶牛被分为对照组和三个实验组。三个实验组的奶牛通过瘤胃管分别连续3天每天饲喂100克腐胺、200克戊酸或200克丁酸。丁酸增加了血浆乙酰乙酸；高产奶牛的这种影响最大。腐胺影响产奶量和采食量，可能单独或与其他胺类共同作用，是导致酮血症的一个因素。戊酸对采食量或血浆乙酰乙酸浓度没有影响。还描述了一种快速分析乙酰乙酸的方法。
