Feeding value of protein-enriched sweet potato pulp for broilers
2000
Demo-os, R.A. | Valdez, M.T.SJ. | Mapili, M.C. Jr (Tarlac Coll. of Agriculture, Camiling, Tarlac (Philippines). Dept. of Animal Science)
The study was conducted to develop a feed product from sweet potato pulp through the adoption of protein enrichment technology modified to suit farm level conditions. Specifically, the most appropriate degree of wetness of the pulp, fungal culture used in fermentation, non-protein nitrogen source/s for the nutrient mixture and technique of sterilizing the fermentation substrate to produce a protein-rich broiler feed from sweet potato pulp were investigated. There were 17 to 20-fold increases in the crude protein content of sweet potato pulp after protein enrichment, compared to the original material. High-moisture sweet potato pulp contained higher percentage of crude protein than low-moisture pulp. Trichoderma harzianum-fermented sweet potato pulp contained 7-9% more crude protein than protein-enriched sweet potato pulp fermented by Rhizopus oligosporus or Aspergillus niger. Feeding trial results showed 0.7-3.8% improvement in gain in weight and 6.4-15.8% improvement in feed conversion when protein-enriched sweet potato pulp was incorporated in the finisher ration. Cost efficiency analysis revealed that savings on feed cost range from PhP2.54-3.81 per bird (finishing stage) and PhP0.49 - 3.06 per bird (growing-finishing stage)
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