사료자원 개발을 위한 연구 2 . 고열량사료로서 어유의 사료적 이용에 관한 연구 = Studies for the Development of New Feed Resources 2 . Utilization of Crude Fish Oil as an Energy Substituent in Broiler Ration

다국어 초록 (Multilingual Abstract)

A feeding experiment was conducted employing 360 five-day-old broiler chicks of Starbro strain to evaluate the nutritive value of fish oil as a high energy feed. Birds were distributed to 6 experimental treatments, 4 replicates per treatment, consisting of non-lipid control, fish oil 5%, animal fat 5%, rice bran wax 5%, fish oil 10%, and, animal fat 10%. Results obtained are summarized as follows: 1. Linoleic acid content, one of the essential fatty acids, of fish oil was considerably lower (0.8%) than the other animal fats or vegetable oils. Animal fat and rice bran wax used in this study had their linoleic acid contents of 9.1% and 33.6%, respectively. 2. Only the birds fed diet containing 10% fish oil was significantly lower (p$lt;0.01) in body weight gain and consumed small amounts of feed. The birds fed diet containing 5% rice bran wax and control diets consumed more diets than any other groups. No differences in feed efficiency were noticed in all treatments. Mortality of the fish oil fed birds were much higher than the others. 3. The birds fed diets containing 10% fish oil or animal fat utilized dry matter and total carbohydrate poorly than the other chicks. With regards to nitrogen retention, rice bran wax group was the highest and fish oil groups were the lowest. The MEn value of 10% fish oil diet was significantly lower compared to the 10% animal fat diet. 4. With these results, it may be conducted that 5% or less of fish oil could be used in broiler rations because of the adverse effect in body weight gain and higher morality observed from the birds fed fish oil. Further study may be necessary for the use of fish oil or mixture of fish oil with the other animal fat, and to determine the proper level within 5% level in broiler rations.