title: Apple peel waste as a natural antioxidant for heat-stressed broiler chickens.
abstract: This study was conducted to evaluate the effects of processed apple peel waste (APW), alone or in combination with an enzyme, as a natural antioxidant on broiler chickens under heat stress. A total of 360 unsexed, 28-day-old broilers were assigned to 6 dietary treatments with four replicates (15 broilers per pen). The experiment consisted of a 3 × 2 factorial arrangement with three levels of apple peel waste (0, 50 or 100 g/kg of diet) and two levels of enzyme (0 or 500 mg/kg, ZY Multi(®)). Inclusion of 100-g APW/kg of diet decreased broiler weight gain at 42 days of age. Inclusion of 50 and 100-g APW/kg of diet increased gizzard and small intestine weights. Feeding 50 and 100-g APW/kg increased high-density lipoprotein (HDL) cholesterol and decreased low-density lipoprotein (LDL) cholesterol and malondialdehyde in blood serum at 49 days of age. At 49 days of age, apparent ileal protein digestibility was reduced when 50 and 100-g APW/kg were used in the diet. This study showed that feeding APW up to 50 g/kg from 28 to 49 days of age increased HDL cholesterol and decreased LDL cholesterol in serum and had no adverse effect on broiler performance.
authors.affiliation: Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Heidarisafar
authors.affiliation: Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran. gsadeghi@uok.ac.ir.
authors.forename: Ghorbanali
authors.initials: G
authors.lastname: Sadeghi
authors.affiliation: Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Karimi
authors.affiliation: Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran.
authors.forename: Osman
authors.initials: O
authors.lastname: Azizi
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002645:Chickens / Q000378:metabolism*; D004032:Diet / Q000662:veterinary*; D018882:Heat Stress Disorders / Q000178:diet therapy / Q000662:veterinary*; D006799:Housing, Animal; D027845:Malus; D011201:Poultry Diseases / Q000178:diet therapy*; D014329:Tropical Climate; D015430:Weight Gain
chemical_list: D000975:Antioxidants
keywords: Apple peel waste; Broiler nutrition; Growth performance; Pectinase