【作者】 苗晓微；

【导师】 张敏；

【作者基本信息】 延边大学 ， 动物营养与饲料科学， 2006， 硕士

【摘要】 为避免抗生素残留及污染，本课题通过肉鸡试验，利用中草药和采自肉鸡肠道的腊样芽孢杆菌、嗜酸乳杆菌经固体发酵培养制备肉鸡合生素，研究合生素对肉鸡生长性能、营养物质利用率、免疫器官指数、屠宰指标、血液指标、肉质和肠道菌群的影响。 试验选择健康、体重相近的1日龄爱拔益加(AA)肉公鸡555只，随机分为五组，每组设3个重复，每重复37只。试验1、2、3组和金霉素(CTC)组分别在基础饲粮中添加0.15％中草药与腊样芽孢杆菌合生素、0.15％中草药与嗜酸乳杆菌合生素、0.15％中草药与腊样芽孢杆菌、嗜酸乳杆菌合生素、50mg／kg金霉素(CTC)，对照组不加任何添加剂。在相同饲养条件下，进行饲养试验、代谢试验、免疫器官指数、屠宰试验、肠道菌群测定、肉质分析、血液指标测定。研究结果表明： (1)合生素可明显提高出栏重、存活率和日增重，降低料重比、节约生产成本。 (2)合生素可改善营养物质代谢率，促进肉鸡对干物质和粗纤维的利用。 (3)合生素可明显抑制空肠内大肠杆菌繁殖，促进有益菌的定植和生长。 (4)合生素能明显促进肉鸡免疫器官的生长发育，提高免疫器官(脾脏、法氏囊、胸腺)指数。 (5)合生素可改善屠宰性能，提高腿肌率、降低腹脂率。 (6)合生素可明显降低血清中胆固醇和尿素氮含量，促进蛋白质代谢。 (7)合生素可提高肉中蛋白质、必需氨基酸、风味氨基酸和必需脂肪酸含量，降低肉中有毒有害物质残留，提高鸡肉营养价值，改善肉品质。 (8)合生素在提高肉鸡生产性能、改善肉质方面优于金霉素，且对肉鸡较为安全、具有相当的经济效益。中药与腊样芽孢杆菌合生素在提高肉鸡生产、改善肉质方面的优势较为突出，可替代金霉素，值得在肉鸡生产中推广应用!更多还原

【Abstract】 In order to avoid the residue and pollution of antibiotics, the solid synbiotics of broilers was manufactured with Chinese herbal medicine, Bacillus cereus and Lactobacillus acidophilus by solid ferment method. Bacillus cereus and Lactobacillus acidophilus were chosen from the intestine of broiler. By broiler’s test, the research which about the effects of synbiotics on growth performance, nutrient utilizing efficiency, immune organs index , butchering index, blood index, chicken quality and intestinal bacteria.555 ARBOR ACRES (AA ) broilers of one day old were randomly assigned to five groups, with three replications per group. Each group had 37 broilers. The trial group 1,2,3 and CTC group were solely added 0.15% synbiotics with Chinese herbal medicine and Bacillus cereus, 0.15% synbiotics with Chinese herbal medicine and Lactobacillus acidophilus, 0.15% synbiotics with Chinese herbal medicine and Bacillus cereus, Lactobacillus acidophilus, 50mg/kg chlortetracycline (CTC) into the basal diet.The control group was no feed additive.Then in the same feeding situation, the feeding test, the metabolizing test, butchering test, bacilli mensurateing, chicken quality analysis and blood index were done.The results showed that:(1)The synbiotics had evident effects on increasing the sold weight, livability and the daily grain. And it reduced feed grain ratio (F/G) and production costs.(2)The synbiotics had evident stimulative effect on the metabolizing ratio of dry matter and crude fiber.(3)The synbiotics had evident suppressive effect on E.coli. Furthermore, the ecesis and growth of beneficial bacilli were evidently increased in intestine.(4)The synbiotics had evident stimulative effect on the growth of immune organs.Moreover it can increase the immune organs index, such as spleen, bursa of Fabricius and thymus.(5)The synbiotics was better in improving butchering performance, increasing leg thews ratio and reducing ventral fat ratio was reduced.(6)The synbiotics distinctly reduced the amount of cholesterin and urea azote in blood serum.The protein metabolizing capability was increased.(7)The synbiotics can make the amount of protein, essential amino acid(EAA). flavor acid and essential fatty acid(EFA)increase in a wide range.At the same time, the synbiotics can reduce the amount of poisonous substance and improve the chicken更多还原