Miles R D, Janky D M, Harms R H
Poult Sci. 1985 Jan;64(1):139-43. doi: 10.3382/ps.0640139.
Two experiments were conducted for five 28-day periods each. In Experiments 1 and 2, Hyline W-36 hens, 36 and 26 weeks of age, respectively, were used. Experiment 1 was designed to measure the effect of virginiamycin on hen performance and egg characteristics when supplementing a diet having low pigmentation potential. In Experiment 2, the diet contained 3% added fat with 0, 10, and 20 ppm virginiamycin. In Experiment 1, virginiamycin-supplemented hens showed increased (P less than or equal to .05) egg production, body weight, and improved feed efficiency. When egg production and feed efficiency were ranked by quartiles within the control and virginiamycin-supplemented groups, virginiamycin was shown to benefit only the poorer producing hens. In Experiment 2, added fat improved feed efficiency; however, the response to virginiamycin, as observed in Experiment 1, did not occur.
两项实验各进行五个28天的周期。在实验1和实验2中，分别使用了36周龄和26周龄的海兰W-36母鸡。实验1旨在测定在补充色素沉着潜力较低的日粮时，维吉尼亚霉素对母鸡生产性能和蛋品质的影响。在实验2中，日粮含有3%的添加脂肪以及0、10和20 ppm的维吉尼亚霉素。在实验1中，添加维吉尼亚霉素的母鸡产蛋量、体重增加（P≤0.05），饲料效率提高。当按四分位数对对照组和添加维吉尼亚霉素组的产蛋量和饲料效率进行排名时，发现维吉尼亚霉素仅对生产性能较差的母鸡有益。在实验2中，添加脂肪提高了饲料效率；然而，未观察到如实验1中对维吉尼亚霉素的反应。
