复合胃肠道调节剂对断奶仔猪生产性能和小肠结构的影响

在断奶仔猪日粮中添加不同水平的复合胃肠道调节剂,研究观察其对生长性能的影响。选用80头30日龄体重约 8.7 kg的杜洛克×长白×大约克断奶仔猪,随机分为4个组,每个组4个重复,每个重复5头仔猪。试验采用单因子设计,4个处理分别为：空白组(无抗生素和胃肠道调节剂)、抗生素组(抗生素为杆菌肽锌150 mg/kg＋硫酸抗敌素30 mg/kg)、试验组1(在空白组基础上添加复合胃肠道调节剂0.3%)、试验组2(添加复合胃肠道调节剂 0.5%)。结果表明：（1）试验组1、试验组2和抗生素组仔猪平均日增重均显著高于空白组(P<0.05)。(2)各处理组仔猪间血清中白蛋白、尿素氮、总胆固醇、谷丙转氨酶等指标没有显著差异(P＞0.05),试验组和抗生素组仔猪的血清总蛋白含量较空白组仔猪有升高趋势。(3)试验组1仔猪十二指肠的绒毛高度极显著高于其他各组(P<0.01),试验组2仔猪的回肠绒毛高度极显著高于其他各组(P<0.01)；试验组1和试验组2仔猪十二指肠的隐窝深度极显著低于空白组和抗生素组仔猪(P<0.01)。试验组1仔猪的空肠隐窝深度极显著低于其他各组(P<0.01)。

Effect of different levels of compound gastrointestinal microbial modulator on the growth performance and small intestinal structure of weaned pigs

The effects of compound gastrointestinal microbial modulator(CGMM)on growth performance and small intestinal structure of weaned pigs were investigated. Eighty piglets (Duroc×Landrace×Yorkshire) weaned at 30th day were randomly divided into four groups, such as control group(CG), antibiotic group(AG), experimental group one(EG1), experimental group two(EG2). The experimental results showed that: ⑴ The average daily gain(ADG) of EG1, EG2 and AG were significantly higher than that of CG (P<0.05). (2)Serum albumin, blood urea nitrogen, total cholesterol, GPT showed no significant difference among four groups (P>0.05). The total protein (TP) of EG1, EG2 and AG was higher than that of CG, and the serum urea content was lower.(3)The villus height of duodenum in EG1 was significantly higher than the other groups (P<0.01), so was the villus height of jejunum between each groups. The crypt depth of jejunum of EG1 was significantly shorter than that of other groups (P<0.01)．