Replacement of maize with sweet potato (Ipomoea batatas L.) tuber meal in broiler diets
1996
Ravindran, V. | Sivakanesan, R.
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 (1 .9 v 0.1 g/kg) in SPM. The amino acid composition, in general, favoured SPM. 2. Trpsin 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 (14.51 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.
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