Damron B L, Wilson H R
Poult Sci. 1985 Aug;64(8):1451-4. doi: 10.3382/ps.0641451.
A 32-week experiment was carried out in floor pens with Cobb X Cobb breeder pullets that were 28 weeks old at initiation. Ten replicate pens, each containing 13 pullets and 2 males, received one of four dietary treatments. These treatments were either an unmedicated feed or 27.5, 55, or 110 mg/kg of bacitracin methylene disalicylate (BMD). All feeds contained 13.2 mg/kg of hygromycin B. Feed was allocated at a rate of 159 g per day and water was provided continuously. Hen-day egg production was significantly improved by the feeding of 27.5 mg/kg or more of BMD. Egg weights were significantly lower for all groups receiving the drug. Eggs of birds receiving 110 mg/kg were significantly heavier than those produced with 27.5 mg/kg, but neither differed statistically from those of the 55 mg/kg group. Neither final body weight nor overall mortality was significantly related to treatment. Egg fertility was significantly improved by 27.5 mg/kg or more of BMD. Hatchability of fertile eggs was not affected by the drug, but total hatchability was significantly increased through BMD feeding, largely on the strength of improved fertility.
在地面平养栏中对28周龄的科宝X科宝育成母鸡进行了为期32周的试验。10个重复栏，每个栏包含13只母鸡和2只公鸡，接受四种日粮处理之一。这些处理分别是未添加药物的饲料或27.5、55或110毫克/千克的亚甲基水杨酸杆菌肽（BMD）。所有饲料均含有13.2毫克/千克的潮霉素B。饲料以每天159克的速度分配，水持续供应。饲喂27.5毫克/千克或更高剂量的BMD可显著提高母鸡日产蛋量。所有接受药物处理的组蛋重均显著降低。接受110毫克/千克药物处理的鸡所产的蛋比接受27.5毫克/千克药物处理的鸡所产的蛋显著更重，但与接受55毫克/千克药物处理的组所产的蛋在统计学上无差异。最终体重和总体死亡率均与处理无显著相关性。27.5毫克/千克或更高剂量的BMD可显著提高种蛋受精率。药物对受精蛋的孵化率没有影响，但通过饲喂BMD总体孵化率显著提高，这主要得益于受精率的提高。
