Feeding Value of Hydrolyzed Vegetable Fats in Broiler Rations

SINCE Scott et al. (1947) reported that a high energy diet for growing chickens out-performed rations of lower energy content, nutritionists have looked for new ways of increasing the energy content of feeds. Lillie et al. (1952), Pepper et al. (1953), Siedler and Schweigert (1953), and others have shown that added fat is efficiently utilized by poultry. The greatest benefit of added fat has been improved feed utilization with some workers reporting an improvement in growth rate. Most research on the value of added fat in feeds has involved the use of triglycerides, either inedible animal fats or edible vegetable oils. The principal byproduct of the refining of vegetable oil is acidulated soapstock which is primarily free fatty acids. Acidulated soapstock is defined (Rule 196) by the National Cottonseed Products Association (1954) as the product of complete acidulation and thorough settling of soapstock. Soapstock is the by-product obtained from the …