title: Exogenous tannase improves feeding value of a diet containing field beans (Vicia faba) when fed to broilers.
abstract: A total of 72 male Ross 308 broilers were used in a study to investigate the effect of dietary tannase on apparent metabolisable energy (AME), coefficients of dry matter retention (DMR) and nitrogen retention (NR) and fat digestibility (FD) of a diet containing 300 g/kg field beans (Vicia faba). Growth performance variables and gastrointestinal tract development were also measured. Two treatments were used in this study: control (C) and C + 3400 tannase units (TU) per kg feed. Diets were formulated to be nutritionally adequate with the exception that the AME was lower than recommended (12.65 vs 12.97 MJ/kg, respectively). Inclusion of tannase increased AME by 0.4 MJ/kg DM. Tannase supplementation improved dietary DMR, NR and FD by 2.8%, 3.2% and 6.5%, respectively. Birds given tannase had 4.4% reduction in feed intake and 2.6% improvement in gain to feed ratio (P < 0.05). Compared to control diet, birds given tannase had reduced relative to body weight (%BW) proventriculus and gizzard and pancreas weights, 3.29% vs 3.09% and 0.47% vs 0.44%, respectively. The mechanisms of action of the studied enzyme require further elucidation.
authors: a The National Institute of Poultry Husbandry , Harper Adams University , Shropshire , UK.
authors: J
authors: J
authors: Abdulla
authors: a The National Institute of Poultry Husbandry , Harper Adams University , Shropshire , UK.
authors: S P
authors: SP
authors: Rose
authors: a The National Institute of Poultry Husbandry , Harper Adams University , Shropshire , UK.
authors: A M
authors: AM
authors: Mackenzie
authors: a The National Institute of Poultry Husbandry , Harper Adams University , Shropshire , UK.
authors: W
authors: W
authors: Mirza
authors: a The National Institute of Poultry Husbandry , Harper Adams University , Shropshire , UK.
authors: V
authors: V
authors: Pirgozliev
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002265:Carboxylic Ester Hydrolases / Q000008:administration & dosage / Q000378:metabolism*; D002645:Chickens / Q000254:growth & development / Q000502:physiology*; D004032:Diet / Q000662:veterinary*; D019587:Dietary Supplements; D004734:Energy Metabolism / Q000502:physiology; D008297:Male; D009753:Nutritive Value; D011897:Random Allocation; D031307:Vicia faba / Q000737:chemistry; D015430:Weight Gain / Q000502:physiology
chemical_list: D002265:Carboxylic Ester Hydrolases; C022711:tannase