Feeding value of protein-enriched sweet potato pulp as broiler feed

• Main Authors: Demo-os, R.A, Valdez, M.T.S.J, Mapili, M.C. Jr (Tarlac Coll. of Agriculture, Camiling, Tarlac (Philippines). Dept. of Animal Science)
• Format: Conference Proceeding
• Language: English
• Published: College, Laguna (Philippines) PSAS 1999
• Subjects: ALIMENT POUR ANIMAUX; BATATA; BROILER CHICKENS; CRUDE PROTEIN; EFFICACITE ALIMENTAIRE; EFICIENCIA DE CONVERSION DEL PIENSO; FEED CONVERSION EFFICIENCY; FEEDS; NUTRITIVE VALUE; PASTA; PATATE DOUCE; PATE CELLULOSIQUE; PIENSOS; POLLO DE ENGORDE; POULET DE CHAIR; PROTEINA BRUTA; PROTEINE BRUTE; PULP; SWEET POTATOES; VALEUR NUTRITIVE; VALOR NUTRITIVO

The research was conducted to develop a feed product from sweetpotato pulp through the adoption of the protein enrichment technology modified to suit farm level conditions. In general, results of the studies revealed that there were marked increases in the crude protein contents of sweetpotato pulp after protein enrichment, the increase being 17 to 20-fold compared to the crude protein value of the original material. High-moisture sweetpotato pulp was found to be a better fermentable substrate with the resulting feed containing higher percentage of crude protein than that produced from low-moisture pulp. The aseptic and semi-septic techniques of sterilizing the substrate prior to inoculation did not show marked influence on the crude protein contents of the protein-enriched sweetpotato pulp. Likewise, the three non-protein nitrogen sources had similar effect on the feeding value of the fermented feed. On the other hand, T. harzianum was found to be the most appropriate fungal species in fermenting the sweetpotato pulp. T. Harzianum-fermented sweetpotsto pulp contained seven to nine percent more crude protein than protein-enriched sweetpotato pulp fermented by R. oligosporus or A. niger. Results of feeding trial with broilers showed that gain in weight was improved by 0.7 to 3.8 percent when protein-enriched sweetpotato pulp was incorporated in the finisher ration. Likewise, there was 6.4 to 15.8 percent improvement in feed conversion. The gain in weight, and feed efficiency of treated birds fed protein-enriched sweetpotato pulp were comparable to those given standard commercial rations from 10-38 days of age. Cost efficiency analysis revealed that savings on feed cost range from P2.54 to P3.81 per bird (finishing stage) and P0.48 to P3.06 (growing-finishing stage)