Performance and caecal adaptation of turkeys to diets without or with antibiotic and with different levels of mannan-oligosaccharide.
A study on turkeys was conducted to evaluate the administration of different levels of mannan-oligosaccharide (MOS) (0.1, 0.25 and 0.5%) to a diet without or with an antibiotic (Flavomycin, 8 mg/kg feed). The growth performance as well as caecal development and metabolism indicators of turkeys after 8 weeks of experimental feeding were estimated. No interactions were noted between the contents of antibiotic and MOS in the diet in any of the parameters examined. During 8 weeks of experimental feeding, the feed intake as well as feed conversion ratio were similar in all experimental groups. The turkeys fed a control diet (without MOS) supplemented with antibiotic were the heaviest, but there were no statistical differences between groups. Depending on dietary dose, MOS had a different influence on caecal digesta parameters. The medium level of dietary MOS (0.25%) resulted in the highest caecal pH, dry matter and protein concentrations as well as the bacterial glycolytic activity (including beta-glucuronidase). Compared to other dietary treatments, the highest amount of MOS (0.5%) reduced ammonia concentration and enhanced volatile fatty acids concentration, especially of acetate and butyrate, in the caecal digesta. The medium level of dietary MOS caused a significant enhancement of propionate, iso-butyrate and iso-valerate concentrations in the digesta. The antibiotic addition to a diet resulted in a lack of birds' response.
Zduńczyk
Z
Z
Institute of Animal Reproduction and Food Research of Polish Academy of Sciences, Olsztyn, Poland. zez@pan.olsztyn.pl
Juśkiewicz
J
J
Jankowski
J
J
Koncicki
A
A
D000222:Adaptation, Physiological; D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000900:Anti-Bacterial Agents / Q000008:administration & dosage* / Q000494:pharmacology; D001455:Bambermycins / Q000008:administration & dosage* / Q000494:pharmacology; D002432:Cecum / Q000254:growth & development / Q000378:metabolism* / Q000382:microbiology; D019587:Dietary Supplements; D004305:Dose-Response Relationship, Drug; D005232:Fatty Acids, Volatile / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008351:Mannans / Q000008:administration & dosage* / Q000378:metabolism; D009844:Oligosaccharides / Q000008:administration & dosage* / Q000378:metabolism; D011897:Random Allocation; D014422:Turkeys / Q000254:growth & development*; D015430:Weight Gain / Q000187:drug effects
D000900:Anti-Bacterial Agents; D005232:Fatty Acids, Volatile; D008351:Mannans; D009844:Oligosaccharides; D001455:Bambermycins