title: Efficacy of β-mannanase supplementation to corn-soya bean meal-based diets on growth performance, nutrient digestibility, blood urea nitrogen, faecal coliform and lactic acid bacteria and faecal noxious gas emission in growing pigs.
abstract: A study was conducted to determine the efficacy of β-mannanase supplementation to a diet based on corn and soya bean meal (SBM) on growth performance, nutrient digestibility, blood urea nitrogen (BUN), faecal coliforms and lactic acid bacteria, and noxious gas emission in growing pigs. A total of 140 pigs [(Landrace × Yorkshire) × Duroc; average body weight 25 ± 3 kg] were randomly allotted to a 2 × 2 factorial arrangement with dietary treatments consisting of hulled or dehulled SBM without or with supplementation of 400 U β-mannanase/kg. During the 6 weeks of experimental feeding, β-mannanase supplementation had no effect on body weight gain, feed intake and gain:feed (G:F) ratio. Compared with dehulled SBM, feeding hulled SBM caused an increased feed intake of pigs in the entire trial (p = 0.05). The G:F ratio was improved in pigs receiving dehulled SBM (p < 0.05). Dietary treatments did not influence the total tract digestibility of dry matter, nitrogen and gross energy. Enzyme supplementation reduced (p < 0.05) the population of faecal coliforms and tended to reduce the NH3 concentration after 24 h of fermentation in a closed box containing faecal slurry. Feeding hulled SBM tended to reduce NH3 emission on days 3 and 5 of fermentation. In conclusion, mannanase supplementation had no influence on growth performance and nutrient digestibility but showed a positive effect on reducing coliform population and tended to reduce NH3 emission. Dehulled SBM increased G:F ratio and hulled SBM tended to reduce NH3 emission.
authors.affiliation: a Department of Animal Resource and Science , Dankook University , Cheonan , South Korea.
authors.forename: Santi Devi
authors.initials: SD
authors.lastname: Upadhaya
authors.affiliation: a Department of Animal Resource and Science , Dankook University , Cheonan , South Korea.
authors.forename: Jae Won
authors.initials: JW
authors.lastname: Park
authors.affiliation: b CTC Bio Inc ., Seoul , South Korea.
authors.forename: Jae Hwan
authors.initials: JH
authors.lastname: Lee
authors.affiliation: a Department of Animal Resource and Science , Dankook University , Cheonan , South Korea.
authors.forename: In Ho
authors.initials: IH
authors.lastname: Kim
mesh_terms: D000393:Air Pollutants / Q000378:metabolism; D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D018407:Bacterial Physiological Phenomena; D001806:Blood Urea Nitrogen; D004032:Diet / Q000662:veterinary; D019587:Dietary Supplements / Q000032:analysis; D004063:Digestion / Q000502:physiology*; D004755:Enterobacteriaceae / Q000254:growth & development / Q000502:physiology*; D005243:Feces / Q000737:chemistry / Q000382:microbiology; D005260:Female; D005740:Gases / Q000378:metabolism*; D056546:Lactobacillales / Q000254:growth & development / Q000502:physiology*; D008297:Male; D011897:Random Allocation; D013025:Glycine max; D013552:Swine / Q000254:growth & development / Q000502:physiology*; D044902:beta-Mannosidase / Q000378:metabolism*
chemical_list: D000393:Air Pollutants; D005740:Gases; D044902:beta-Mannosidase
keywords: Digestibility; enzymes; feed additives; mannans; noxious gases; performance; pigs; soya bean oilmeal