title: Replacement of maize with sweet potato (Ipomoea batatas L.) tuber meal in broiler diets.
abstract: 1. The nutrient composition of sweet potato tuber meal (SPM) was similar to that of maize, with the exceptions of crude protein and calcium. The crude protein content was lower (62 v 91 g/kg) and the calcium content was higher (l.9 v 0.l g/kg) in SPM. The amino acid composition, in general, favoured SPM. 2. Trypsin inhibitor activity, and the contents of oxalate and phytate-phosphorus in SPM were too low to be of any nutritional concern. 3. The apparent metabolisable energy content of SPM was determined to be similar to that of maize (14.5l V 14.45 MJ/kg). 4. The results of feeding trials showed that SPM can replace up to 400 g/kg maize in broiler diets without adverse effects in performance. The depression in weight gains observed in birds fed on a diet containing 600 g SPM/kg was related largely to lowered food intake arising from the powdery texture of SPM.
authors.affiliation: Department of Animal Science, University of Peradeniya, Sri Lanka.
authors.forename: V
authors.initials: V
authors.lastname: Ravindran
authors.forename: R
authors.initials: R
authors.lastname: Sivakanesan
mesh_terms: D000821:Animal Feed; D000818:Animals; D002118:Calcium; D002151:Calorimetry; D002645:Chickens; D004734:Energy Metabolism; D005247:Feeding Behavior; D005504:Food Analysis; D009929:Organ Size; D010070:Oxalates / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D010833:Phytic Acid / Q000032:analysis; D014674:Plant Proteins, Dietary; D014675:Vegetables; D015430:Weight Gain; D003313:Zea mays
chemical_list: D010070:Oxalates; D014674:Plant Proteins, Dietary; D010758:Phosphorus; D010833:Phytic Acid; D002118:Calcium