3种饲料添加剂对肉鸡小肠形态结构的影响

Effects of Three Feed Additives on Mucosal Structure in Small Intestine of Broiler

将32只1日龄健康AA肉鸡随机分为4个处理组:A组(对照组,基础日粮)、B组(抗生素组,基础日粮+硫酸抗敌素100 mg/kg)、C组(中草药组,基础日粮+幼康宝500 mg/kg)和D组(丁酸钠组,基础日粮+丁酸钠500mg/kg)。试验7周后,采用组织学技术研究肉鸡小肠黏膜结构的形态及其变化。结果显示:(1)各试验组小肠的黏膜结构都比对照组完整;(2)各试验组的小肠各段绒毛高度、V/C值、黏膜厚度及肌层厚度均高于对照组;(3)对照组V/C值由十二指肠向回肠逐渐降低,而各试验组V/C值,十二指肠的最大,回肠的次之,空肠的最小。结论:3种添加剂均可不同程度地改善肉鸡小肠黏膜结构,并且丁酸钠和幼康宝在一定程度上具有替代硫酸抗敌素的可行性。

Thirty-two healthy one-day-old AA broilers were divided into 4 groups in this study： Group A （control） with basic diet, Group B with basic diet and antibiotic （100 mg/kg of Colistin）, Group C with basic diet and 500 mg/kg of Chinese Medicine （Youkangbao）, and Group D with basic diet and 500 mg/kg of sodium butyrate. After seven weeks, the mucosal structure of small intestine was observed. Results were as follows： （1） There were significantly differences in the morphological change of mucosa of small intestine among A, B, C, and D groups. （2） The lengths of villi, V/C value, thickness of mucosa, and thickness of muscular layer in experimental groups were larger than that of control group. （3） The value of V/C decreased from duodenum to ileum in control group, but it was larger in ileum than that of the jejunum in experimental groups. However, the value of V/C was larger in experimental groups compared with control group. This study indicated that three feed additives could improve mucosal structure of small intestine in broiler; Sodium butyrate and Chinese Medicine （Youkangbao） have the feasibility to substitute of antibiotic in improving mucosal structure of small intestine.