title: Efficacy of supplementation of a phytase-producing bacterial culture on the performance and nutrient use of broiler chickens fed corn-soybean meal diets.
abstract: We evaluated the efficacy of supplementation of active Mitsuokella jalaludinii culture (AMJC) on the growth performance, nutrient use, and mineral concentrations in tibia bone and plasma of broiler chickens fed corn-soybean meal diets. Dietary treatments included low-nonphytate P (NPP) feed (containing 0.24% and 0.232% NPP for chicks from 1 to 21 and 22 to 42 d of age, respectively), low-NPP feed added with different levels of AMJC (equivalent to 250, 500, 750, and 1,000 U phytase/kg of feed), and normal-NPP feed (containing 0.46 and 0.354% NPP for chicks from 1 to 21 and 22 to 42 d of age, respectively). Supplementation of AMJC to low-NPP feed increased (P < 0.05) weight gain and feed intake and decreased (P < 0.05) feed:gain ratio of chickens during the whole experiment (Days 1 to 42). Supplementation of AMJC increased (P < 0.05) the AME value, digestibility of DM and CP, and retention of P, Ca, and Cu. Mn retention in broilers was only increased (P < 0.05) by AMJC supplementation from 18 to 20 d of age, and Zn retention was improved (P < 0.05) only at a high level of AMJC (equivalent to 1,000 U phytase/kg of feed) supplementation. Chicks fed low-NPP feed added with AMJC had similar tibia ash percentages as those fed the normal-NPP diet. Generally, supplementing AMJC to low-NPP feed increased (P < 0.05) Ca, decreased significantly (P < 0.05) Mn and Cu, but did not affect Zn and P concentrations in tibia ash. Supplementing AMJC also increased (P < 0.05) plasma P but had no effect on plasma Ca or Mn. Plasma Zn concentration was increased only when a high level of AMJC (equivalent to 1,000 U phytase/kg of feed) was used. In conclusion, AMJC supplementation to low-NPP feed improved growth performance; AME value; digestibility of CP and DM; use of Ca, P, and Cu; and bone mineralization.
authors.affiliation: Intitute of Bioscience, Universiti Putra Malaysia, Serdang, Selangor.
authors.forename: G Q
authors.initials: GQ
authors.lastname: Lan
authors.forename: N
authors.initials: N
authors.lastname: Abdullah
authors.forename: S
authors.initials: S
authors.lastname: Jalaludin
authors.forename: Y W
authors.initials: YW
authors.lastname: Ho
mesh_terms: D010832:6-Phytase / Q000008:administration & dosage / Q000096:biosynthesis*; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001682:Biological Availability; D002645:Chickens / Q000502:physiology*; D019587:Dietary Supplements; D004063:Digestion; D004435:Eating; D008297:Male; D008903:Minerals / Q000032:analysis / Q000097:blood / Q000493:pharmacokinetics; D010459:Peptococcaceae / Q000201:enzymology*; D019936:Probiotics; D013025:Glycine max; D013977:Tibia / Q000737:chemistry; D015430:Weight Gain; D003313:Zea mays
chemical_list: D008903:Minerals; D010832:6-Phytase