건조비지 첨가가 육계 및 산란계의 생산성에 미치는 영향 = The Effects of Dried Soybean Curd Residue Supplementation on the Performance of Broilers and Layers

다국어 초록 (Multilingual Abstract)

Two experiments were conducted to evaluate the feeding value and extra beneficial effect of dried soybean curd residue(DSCR) as a feedstuff for broiler chicks(Experiment 1) and laying hens(Experiment 2). Experiment I was conducted utilizing 180 Arbor Acres broiler and fed with broiler diets containing 0%, 5% and 10% the DSCR throughout the experiment. The birds were randomly distributed into three treatment groups of 20 birds each, and each with three replicates. As compared to the control groups, the chicks receiving the DSCR had a slightly decreased in body weight gain, teed consumption but the differences were significant(P$lt;0.05) only in the first period(I to 3wk of age). Feed consumption decreased with increasing the DSCR in the diet, which consequently improved the feed conversion ratio. Dietary protein utilization of birds fed with the DSCR significantly (P$lt;0.05) decreased in the DSCR 5%(37.34%) whereas digestibility of fat was significantly (P$lt;0.05) increased in the DSCR 10%(85.42%) compared to that of control groups. The DSCR significantly decreased blood cholesterol at all level of the DSCR supplementation when compared with the control treatments. The protein content of chest muscle was increased, but abdominal fat decreased when the DSCR was fed. Addition of either 5% or 10% DSCR to the diet resulted in significantly reduced carcass fat. In Experiment 2, a total of 90, three groups of 10 White Leghom(Manina strun) 28 week-old pullets were placed in individual cages and fed a commercial laying ration supplemented with 0%(control), 2.5% and 5% the DSCR. After three months of feeding the diets, there was a significant supplementary effect on egg production and daily egg mass, but not on egg weight. Increasing the DSCR supplementation affected all three parameters. At levels up to 5% the DSCR, a slight decrease in average cholesterol content of egg yolk from hen on diet the DSCR 2.5% and 5% were observed. However, these changes were not statically significant. From these results, it was concluded that the DSCR is an effective dietary supplement for reducing total plasma cholesterol and fat content, Also, the DSCR did good influence on both egg production and yolk cholesterol.