A Comparison of Eight Grades of Fat as Broiler Feed Ingredients

摘要: Abstract Seven samples of feed- or pet food-grade fats (feed- and poultry greases, restaurant grease, white animal/vegetable oil blend, palm oil, yellow grease) one edible fat (soybean oil) were evaluated for quality fatty acid composition. Active oxygen method (AOM) stability at 20 h ranged from 2 to 370 meq/kg; iodine value 78 130 g/100 g; total moisture, insolubles, unsaponifiables 0.46 3.33%; initial peroxide values 0.2 18.4 free acids 0.08 21.0%. The ME the 7.1 12.7 kcal/g was positively correlated with AOM value. When incorporated into corn-and-soybean-meal-based diets 3 6%, no differences in live performance due source observed. Increasing level 6% decreased feed conversion by 3.4 points (1.628 vs. 1.662 g/g). Feeding feed-grade grease resulted significantly smaller abdominal pads compared other sources. Only unsaponifiables, responses. Differences noticed pad color (lightness redness) source. MEn not reflected bird performance.