Influence of soybean lecithin and corn lecithin additions to dietary fat on metabolizable energy content of chick diets
1988
Eight diets were formulated, each containing 5% added lipids, in which composition was identical except for the lipid additions. The lipids were 5% of an animal-vegetable fat blend (AVF) which served as the control, 4.5% AVF + 0.5% soybean or corn lecithin, 4.0% AVF + 1.0% soybean or corn lecithin, 5% soybean lecithin, 5% corn lecithin and 5% poultry fat for comparison. Four groups of 10 chicks each were fed each diet from 0-21 days of age. Metabolizable energy content of each diet, corrected for nitrogen retention (MEn), was determined usig chromic oxide (Cr2O3) as an inert marker and employing total excreta collection from days 18-20, inclusive. The MEn (kcal/g of diet) was determined separately for each of the 4 groups fed each diet. Except for one anomalous group, as noted in RESULTS AND DISCUSSION, there was no significant effect of diet on 21-day body weight. The MEn content of the 5% corn lecithin diet was significantly lower (P less than .05) than MEn for both the control and the 4.0% AVF + 1.0% soybean lecithin diets. Otherwise, MEn content did not differ among the diets. The results suggest that feed grade fats can contain considerable quantitites of lecithin without apparent effect on performance of broiler chicks through 3 weeks of age.
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