【摘要】 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。更多还原

【Abstract】 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.更多还原