Nutritive Value of Various Energy Sources for Poultry Feed

VI. Nutritive Value of a Mixture of Rice Oil Alkaline Foots and Rice Oil

Abstract

High nutritive value of rice oil alkaline foots, a byproduct of the refining of food oil, was reported in the previous paper, but high moisture content and high viscosity of the foots made it rather difficult to use foots as a feed ingredient for poultry. To overcome these difficulties, a mixture of the foots and rice oil (4:6) was prepared, which contained 12.9% of moisture, 2.7% of crude ash, 0.5% of crude protein and 7.87kcal/g of gross energy.
Available energy of the sample was estimated by feeding the experimental diets containing 0, 4, or 8% of soybean oil or 4 or 8% of the sample to total 225 7-day-old chicks of egg-type male chicks and meat-type chicks of both sexes for 6 days, and to total 180 13-day-old egg-type male chicks for 21 days, and by feeding the experimental diets containing 0, 3.8 or 7.6% of soybean oil or 4 or 8% of the sample to total 200 oneday-old meat-type chicks of both sexes for 6 weeks.
Three estimates of available energy based on body weight gain per 100g feed taken by 5-point slope ratio assay in 3 experiments were quite agreeable within experimental error, regardless of the difference in age, breed and sex of the chicks as well as in length of experimental period. The findings again suggest that experimental period of 6 days is satisfactory for bioassay of available energy by chicks.
Average of 3 estimates of available energy of the sample was 7.3kcal/g, which corresponded to 93% of gross energy in the sample. High availability of energy in alkaline foots was re-confirmed again.