Castor oil meal (Ricinus communis) as feed for poultry
1987
Ravago, R.R. | Gerpacio, A.L.
Castor oil meal (COM) which had been subjected to different treatments (raw, boiled for 30 minutes before drying, and roasted at 60 deg C., 80 deg C. and 100 deg C. for 30 minutes each) was evaluated to determine: (a) the effects of heat on nutritive value of COM based on chick response; (b) retention efficiency compared with soybean oil meal (SBOM); and (c) clinico-pathological effects on broiler chicks. COM was incorporated in five semipurified repletion diets containing 13% CP, half of which was supplied by COM and the other half by SBOM. In the sixth treatment, SBOM supplied all the 13% CP. With SBOM as the only source of protein a depletion diet containing 8% CP was formulated and fed to day-old broiler chicks for 17 days. Then 162 birds were distributed at random to six treatments replicated three times with birds/replicate. Feeding was done from the 18th to the 32nd day. Initial and weekly weights, feed intake and mortality were recorded. Daily fecal collection was done and the fecal collections from each replicate were pooled for chemical analysis. With the exception of nitrogen retention, all evaluation criteria showed that boiled-dried COM was comparable to SBOM and can replace up to 50% of SBOM in broiler diet. Roasting did not improve nutritive value of COM but boiling for 30 minutes was highly beneficial. Pathological abnormalities were observed among the birds fed with raw and roasted COM diets.
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