Esfiokhi Sh Mousavi, Norouzian M A, Abadi Mr Sahl, Ahvanooei Mr Rezaei
Department of Animals and Poultry Science, College of Aburaihan, University of Tehran, Tehran, Iran.
Vet Anim Sci. 2024 Jun 6;25:100368. doi: 10.1016/j.vas.2024.100368. eCollection 2024 Sep.
The objective of this study was to investigate the effects of feeding cow's milk replacer and probiotic supplementation on growth performance, blood metabolites, ruminal fermentation parameters, and nutrient digestibility in male lambs, with ewe's milk serving as the control treatment. Eighteen male lambs with an average initial body weight of 5.0 ± 1.2 kg and age of 15 ± 4 days were randomly assigned to three experimental groups: ewe's milk, cow's milk replacer, and cow's milk replacer with probiotic supplementation. The experiment was conducted using a completely randomized design. Lambs fed ewe's milk showed significantly higher average daily gain (218.4 g/day) compared to those fed cow's milk replacer (183.7 g/day) or cow's milk replacer with probiotic (209.1 g/day). Similarly, dry matter intake was highest in the ewe's milk group (585.6 g/day) compared to the cow's milk replacer (435.9 g/day) and cow's milk replacer with probiotic (510.5 g/day) groups. Blood glucose levels were higher in the ewe's milk group (75.3 mg/dL) compared to the cow's milk replacer (70.3 mg/dL) and cow's milk replacer with probiotic (72.1 mg/dL) groups. Probiotic supplementation resulted in increased blood urea nitrogen (15.6 mg/dL) and total protein (7.3 g/dL) levels compared to the other groups. Furthermore, the ewe's milk group showed higher apparent dry matter (76.1%) and crude protein (68.5%) digestibility compared to the other treatments. The fecal score on day 30 was higher in the cow's milk replacer group (2.34) compared to the ewe's milk (1.24) and cow's milk replacer with probiotic (1.45) groups. There were no significant differences in the carcass traits of the experimental lambs. In conclusion, based on the results of this study, it seems that feeding cow's milk + probiotic as a replacement for ewe's milk did not significantly affect the performance, carcass traits, and blood and fermentation parameters in infant lambs.
本研究的目的是调查用代用牛奶和补充益生菌对雄性羔羊生长性能、血液代谢物、瘤胃发酵参数和养分消化率的影响，以母乳作为对照处理。18只平均初始体重为5.0±1.2千克、年龄为15±4天的雄性羔羊被随机分为三个实验组：母乳组、代用牛奶组和补充益生菌的代用牛奶组。实验采用完全随机设计。与饲喂代用牛奶（183.7克/天）或补充益生菌的代用牛奶（209.1克/天）的羔羊相比，饲喂母乳的羔羊平均日增重显著更高（218.4克/天）。同样，母乳组的干物质摄入量（585.6克/天）高于代用牛奶组（435.9克/天）和补充益生菌的代用牛奶组（510.5克/天）。与代用牛奶组（70.3毫克/分升）和补充益生菌的代用牛奶组（72.1毫克/分升）相比，母乳组的血糖水平更高（75.3毫克/分升）。与其他组相比，补充益生菌使血液尿素氮（15.6毫克/分升）和总蛋白（7.3克/分升）水平升高。此外，与其他处理相比，母乳组的表观干物质消化率（76.1%）和粗蛋白消化率（68.5%）更高。在第30天时，代用牛奶组的粪便评分（2.34）高于母乳组（1.24）和补充益生菌的代用牛奶组（1.45）。实验羔羊的胴体性状没有显著差异。总之，根据本研究结果，用代用牛奶+益生菌替代母乳似乎对羔羊的性能、胴体性状以及血液和发酵参数没有显著影响。
