الفهرس | Only 14 pages are availabe for public view |
Abstract This experiment was conducted to study the effects of adding Mannan Oligosaccharides (MOS) as replacer to Antibiotic (Lincomycin) on productive performance, relative organs weight, nutrient digestibility, some blood parameters, and cecum microbiota of broiler chickens using a total of 180 one–day- old Ross broiler chicks randomly divided to control group fed a basal diet and four dietary treatments with six replicates for each. The four treatments were fed a basal diet supplemented with different levels of Mannan oligosaccharides 0.5, 1, and 2 g/Kg diet and Lincomycin 4.4 mg/Kg diet during 35 days feeding trial. At all experimental periods, the group fed a basal diet supplemented with 2 g MOS/Kg feed had considerably higher body weight and weight gain, while having the lowest feed consumption and best feed conversion ratio compared to the other treatment groups. Moreover, dietary supplementation of Bio-MOS resulted in a significant decrease in the counts of ceacal E. coli and Enterococcus, while Lactobacillus and Yeast bacteria counts were significantly higher, compared to non-supplemented groups. Chicks having 2 g MOS/kg diet recorded lower values of cholesterol, LDL (low-density lipoprotein), urea, and liver enzymes AST (Aspartate transaminase), ALT (alanine aminotransferase), compared to the other experimental groups, but, HDL (highdensity lipoprotein) of such group was significantly higher compared to other experimental groups. group treated by MOS 2 g/Kg feed improved all tested nutrients digestibility as compared to the control group, Additionally, MOS supplementation also increased the intestinal villi length, width, and crypt depth and decreased intestinal inflammation, compared to the control group. In conclusion, supplementation of MOS at 2 g/kg diet improved growth performance, digestibility, and blood parameters without having adverse effects on the intestine of broiler chickens, comparable to the lincomycin. |