Stoĭkov D, Ganovski Kh, Karabashev G, Shishkov I, Apostolov K
Vet Med Nauki. 1976;13(6):79-84.
Triais with a total of 240 cows were carried out. The animals were given 30 g DL-methionine each per day. Results showed that the infusoria count per one cu.cm of rumen content in lactating cows that had been given methionine at the rate of 30 g daily was 137013, while in the control animals it was 76431. The amount of lipid matter rose by 0.4 per cent in the controls in the course of the first 90 days of the lactation period. The milk yield of cows that received methionine also rose by 16 per cent, on an average, as calculated in terms of 4 per cent butterfat content for 24-hour period up to the third month of lactation. DL-methinionine in the diet of cows for the first months of lactation leads to grater amounts of milk of higher quality as well as to improving the health of the animals.
共对240头奶牛进行了试验。给这些动物每天每头投喂30克DL-蛋氨酸。结果表明，每天按30克的量投喂蛋氨酸的泌乳奶牛，每立方厘米瘤胃内容物中的纤毛虫数量为137013个，而对照动物为76431个。在泌乳期的前90天里，对照动物的脂质物质含量增加了0.4%。按泌乳期第三个月前24小时4%的乳脂率计算，投喂蛋氨酸的奶牛的产奶量平均也提高了16%。泌乳期头几个月给奶牛的日粮中添加DL-蛋氨酸，会使产奶量增加、奶的品质提高，还能改善动物健康状况。
