Rostami Farhad, Ghasemi Hossein A, Taherpour Kamran
Department of Animal Science, Faculty of Agriculture, Ilam University, Ilam, Iran.
Department of Animal Science, Faculty of Agriculture and Natural Resources, Arak University, 38156-8-8349 Arak, Iran.
Poult Sci. 2015 Sep;94(9):2202-9. doi: 10.3382/ps/pev198. Epub 2015 Jul 27.
An experiment was conducted to investigate the comparative effect of Scrophularia striata, Ferulago angulata, and virginiamycin (VM) on performance, intestinal microbial population, immune response, and blood constituents of broilers. A total of 300 Ross 308 male broiler chickens were randomly assigned to 5 treatments, with 5 replicates/treatment (10 chickens/pen). Birds were fed either a corn-soybean meal basal diet (control) or the basal diet supplemented with 200 mg/kg VM; 4 g/kg S. striata (SS1); 8 g/kg S. striata (SS2); 4 g/kg F. angulata (FA1); or 8 g/kg F. angulata (FA2). After 6 wk, the BW, ADG, and feed-to-gain ratio (F:G) of the VM, SS1, and FA1 groups were better (P<0.01) compared with the control group. At 42 d, cecal lactobacillus counts were higher (P=0.032) in SS2 and FA2 groups compared with the control and VM groups. In addition, broilers fed any of the diets exhibited lower coliform counts (P<0.05) in the ileum and ceca than those fed the control diet. Total and IgG antibody titers against SRBC for secondary responses, relative spleen weight, and lymphocyte counts were higher (P<0.05) in birds fed the SS2 or FA2 diet compared with the control group. Moreover, feeding the SS2 or FA2 diet decreased (P<0.05) the blood heterophil/lymphocyte ratio and plasma triglyceride level, whereas only the SS2 diet increased (P=0.037) the white blood cell counts compared with the control diet. All diets, except for the VM diet, decreased (P=0.009) the plasma cholesterol level compared to the control treatment. The plasma high-density lipoprotein cholesterol level was also increased (P=0.042) in the SS2 and FA2 groups. In conclusion, dietary S. striata or F. angulata at a level of 4 g/kg diet enhanced growth performance, which was comparable to that of VM used as an antibiotic growth promoter. Furthermore, a high dose of both herbs (8 g/kg diet) could beneficially affect the intestinal health and immune status of broilers.
进行了一项实验，以研究玄参、棱角阿魏和维吉尼亚霉素（VM）对肉鸡生产性能、肠道微生物种群、免疫反应和血液成分的比较效果。总共300只罗斯308雄性肉鸡被随机分配到5种处理组，每组5个重复（每栏10只鸡）。鸡只分别饲喂玉米-豆粕基础日粮（对照组）或添加200 mg/kg VM的基础日粮；4 g/kg玄参（SS1）；8 g/kg玄参（SS2）；4 g/kg棱角阿魏（FA1）；或8 g/kg棱角阿魏（FA2）。6周后，VM组、SS1组和FA1组的体重、平均日增重和料重比（F:G）均优于对照组（P<0.01）。在42日龄时，SS2组和FA2组的盲肠乳酸杆菌数量高于对照组和VM组（P=0.032）。此外，与饲喂对照日粮的肉鸡相比，饲喂任何一种日粮的肉鸡回肠和盲肠中的大肠杆菌数量均较低（P<0.05）。与对照组相比，饲喂SS2或FA2日粮的鸡对SRBC的二次反应的总抗体和IgG抗体滴度、相对脾脏重量和淋巴细胞数量均较高（P<0.05）。此外，饲喂SS2或FA2日粮可降低（P<0.05）血液中嗜异性粒细胞/淋巴细胞比率和血浆甘油三酯水平，而与对照日粮相比，只有SS2日粮可增加（P=0.037）白细胞数量。与对照处理相比，除VM日粮外，所有日粮均降低了（P=0.009）血浆胆固醇水平。SS2组和FA2组的血浆高密度脂蛋白胆固醇水平也有所升高（P=0.042）。总之，日粮中添加4 g/kg的玄参或棱角阿魏可提高生长性能，这与用作抗生素生长促进剂的VM相当。此外，高剂量的两种草药（8 g/kg日粮）可对肉鸡的肠道健康和免疫状态产生有益影响。
