지방공급원이 어린 병아리에서 에너지와 단백질 비율에 미치는 영향

Abstract

This study was designed to investigate the effect of dietary fat sources on calorie/protein(C/7) ratio in young chicks. In experiment 1, various sources of fats such as com oil, soy oil, rapeseed oil, palm oil, tallow, fish oil and hydrogenated fish oil were added individually at a level of 11.14% to practical type diets primarily based on corn and soybean meal. Control diet contacted 3% of corn oil. Eight groups of White Leghorn male chicks were fed purified isocaloric diets in experiment 1. The second experiment was to compare the effects of different levels of C/P ratio of the diets on performances and absorption rates of energy, protein and fat in the chick. In experiment 2, three groups(group 1: control 2 and 3) received diets which provided a calorie: protein ratio of 146.0, 146.5 and 164.5, respectively. Control diet(C/P ratio=146.0) was the same as in experiment 1. Another diet was added with 11.14% corn oil(C/P ratio=146.5) and the other diets with 10% com oil(C/P ratio=164.5). The diets in experiment 1 and 2 were fed ad libitum for 26 days individually. Ducting the 26 days of the experiment period, samples of feed and excreta were collected for calculations of the protein retention, fat and energy absorption of the diets. Excreta were collected ducting the last part of the experiment over five days at each batteries. In experiment 1 and 2, feed intake, body weight gain and feed/gain ratio were not statistically different from controls. Body weight gain, fed efficiency was evaluated in young chicks fed diets in which added fat varied, C/P ratio different. Body weight gain and feed efficiency did not change significantly when fat was added isocalorically. There were no statistically significant differences between groups in metabolizable energy. In conclusion these results suggest that calorie/protein ratio is influenced by dietary fat sources in young chicks.