Lalov N, Kanev S, Nakov S, Ilieva I, Klisurov Kh
Vet Med Nauki. 1979;16(3):88-94.
Two experiments were carried out with sows for fattening having a body weight of 20 to 100 kg. The following nutritive antibiotics were tested -- bacipharmin -- 10% (PRB), zinkbacitracin -- 10% (UFRJ), vitamycin 3 (USSR), nitrovin (Peizun, USA) and mekadox -- 5% (USA). It was established that the stimulating effect of these antibiotics was manifested during the first fattening period -- up to 60 kg body weight, when the average daily increment of the experimental groups treated with bacipharmin, zink bacitracin and nictrovin in the I experiment was 7--15% higher and in the II experiment in which zink bacitracin, vitamycin 3, nitrovin and mekadox were added -- 8--14% higher as compared to the control groups. During the second period of fattening (60--100kg) no effect of the same nutritive antibiotics was observed, with the exception of the vitamycin treated group. In both experiments an economy of combined fodder per 1 kg body weight was realized in the experimental groups. Application of nutritive antibiotics and biostimulators during the second period is economically unexpedient. The antibiotics tested have no negative effect on carcass slaughter characteristics and on the chemical composition of meat. No residual substances of the nutritive antibiotics tested were detected on the second day following slaughter in the meat group treated with mekadox, since no sows of this group were slaughtered.
用体重20至100公斤的育肥母猪进行了两项试验。对以下营养性抗生素进行了测试——杆菌肽锌10%（PRB）、硫酸黏杆菌素10%（UFRJ）、维它霉素3（苏联）、硝呋烯腙（美国培尊）和美加霉素5%（美国）。结果表明，这些抗生素的刺激作用在第一个育肥期——体重达到60公斤时表现出来，在I试验中，用杆菌肽锌、硫酸黏杆菌素和硝呋烯腙处理的实验组的平均日增重比对照组高7%至15%，在II试验中，添加了硫酸黏杆菌素、维它霉素3、硝呋烯腙和美加霉素的实验组——比对照组高8%至14%。在第二个育肥期（60至100公斤），除了用维它霉素处理的组外，未观察到相同营养性抗生素的效果。在两项试验中，实验组每1公斤体重的配合饲料都实现了节约。在第二个时期使用营养性抗生素和生物刺激剂在经济上是不合算的。所测试的抗生素对胴体屠宰特性和肉的化学成分没有负面影响。在用美加霉素处理的肉组中，在屠宰后的第二天未检测到所测试的营养性抗生素的残留物质，因为该组没有母猪被屠宰。
