ABSTRACT To investigate the effect of direct fed microbial (DFM) on performance of fattening lamb, 4 treatments (7 animals/treatment) were evaluated; (1) control (without additive; CON); (2) Lactobacillus fermentum and Lactobacillus plantarum (FP); (3) Saccharomyces cerevisiae (SC) plus FP (SCFP) and (4) Megasphaera elsdenii plus SCFP (MSCFP). Feed intake, final body and feed efficiency except average daily gain were not affected by experimental treatment. Digestibility of dry matter and organic matter increased (P < 0.05) in MSCFP lambs versus other treatments. The highest (P < 0.05) amount of N intake, absorbed N and N retention were observed in MSCFP lambs. Blood parameters and enzymatic profiles were not affected (P > 0.05) by the treatments. The lowest and the highest of minimum pH were observed in CON and SCFP lambs. Moreover, concentration of ammonia-N, total and individual volatile fatty acids (except acetate and butyrate concentration) and acetate to propionate ratio were not affected (P > 0.05) by treatment. According to the results, the use of microbial feed additives had a positive effect on growth performance and some digestive and ruminal fermentation parameters.

中文翻译：

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单独或与酿酒酵母和巨球藻联合口服产乳酸菌对育肥羔羊性能的影响

摘要 为了研究直接饲喂微生物 (DFM) 对育肥羔羊生产性能的影响，评估了 4 种处理（7 只动物/处理）；(1) 对照（无添加剂；CON）；（2）发酵乳杆菌和植物乳杆菌（FP）；(3) 酿酒酵母 (SC) 加 FP (SCFP) 和 (4) Megasphaera elsdenii 加 SCFP (MSCFP)。除平均日增重外，采食量、最终体和饲料效率不受实验处理的影响。与其他处理相比，MSCFP 羔羊的干物质和有机物质的消化率增加（P < 0.05）。在 MSCFP 羔羊中观察到最高 (P < 0.05) 的 N 摄入量、吸收的 N 和 N 保留量。血液参数和酶谱不受治疗影响（P > 0.05）。在 CON 和 SCFP 羔羊中观察到最低和最高的最低 pH 值。而且，氨氮浓度、总挥发性脂肪酸和单个挥发性脂肪酸（乙酸盐和丁酸盐浓度除外）和乙酸丙酸比不受处理的影响（P > 0.05）。根据结果​​，微生物饲料添加剂的使用对生长性能以及一些消化和瘤胃发酵参数有积极影响。