De Schrijver R, Fremaut D, Claes B
Laboratory of Nutrition, Catholic University of Leuven, Belgium.
Dtsch Tierarztl Wochenschr. 1991 Feb;98(2):47-50.
For 28 weeks a feeding experiment was conducted to determine the effects of dietary flavomycin on performance of beef bulls. In the first and second half of the trial, 40 animals (average initial weight 352 kg) had free access to corn silage or beet pulp, respectively, both supplemented with an appropriate concentrate containing 0 or 10 mg/kg of the antibiotic. Daily flavomycin intake was 39 to 46 mg when the animals were on the corn silage diet and 51 to 54 mg when they were fed the beet pulp diet. The animals fed the corn silage-based diet supplemented with flavomycin showed a non-significant improvement of daily gain (1.4%) and feed conversion (2.3%). When the beet pulp-based diet was fed, flavomycin significantly increased daily gain (15.2%, P less than 0.002) and feed conversion efficiency (9.1%, P less than 0.03). For the overall feeding experiment the positive effect of flavomycin feeding was 6.7% on body weight gain (P less than 0.09) and 5.2% on feed conversion (P less than 0.13). Flavomycin did not affect carcass yield of beef bulls. Also the effect of flavomycin on diet digestibility was studied in wethers fed a mixture of beet pulp and concentrate, containing 0 or 10 ppm flavomycin. No significant effect from the antibiotic on digestion of dry matter, crude protein, fibre, fat, ash and N-free extract was observed.
进行了为期28周的饲养试验，以确定日粮中添加黄霉素对肉用公牛生产性能的影响。在试验的前半段和后半段，40头动物（平均初始体重352千克）分别自由采食玉米青贮料或甜菜粕，二者均添加了含0或10毫克/千克抗生素的适当精饲料。动物采食玉米青贮料日粮时，每日黄霉素摄入量为39至46毫克；采食甜菜粕日粮时，每日黄霉素摄入量为51至54毫克。采食添加黄霉素的玉米青贮料日粮的动物，日增重（1.4%）和饲料转化率（2.3%）有不显著提高。饲喂甜菜粕日粮时，黄霉素显著提高了日增重（15.2%，P＜0.002）和饲料转化效率（9.1%，P＜0.03）。在整个饲养试验中，添加黄霉素对体重增加的积极影响为6.7%（P＜0.09），对饲料转化率的积极影响为5.2%（P＜0.13）。黄霉素对肉用公牛的胴体产量没有影响。还研究了黄霉素对采食含0或10 ppm黄霉素的甜菜粕和精饲料混合物的阉羊日粮消化率的影响。未观察到抗生素对干物质、粗蛋白、纤维、脂肪、灰分和无氮浸出物消化率有显著影响。
