复合有机酸联合阿维拉霉素对肉鸡生产性能、肠道菌群和肠道发育的影响

Effects of Compound Organic Acids Combined with Avilamycin on Performance,Intestinal Flora and Development of Broilers

通过研究复合有机酸制剂(COL)及其和阿维拉霉素(AL)联合使用对罗斯肉鸡在生产性能、肠道菌群和肠道发育方面的影响。空白对照组(TC组)正常饲喂基础饲粮,试验组在给予正常饲料的基础上分别添加了10 mg/kg AL(AL组)、5 mg/kg AL和2‰COL(AL+COL组),2‰COL(COL组)。结果表明:1.在21日龄和42日龄时,AL+COL组和COL组的平均末重、日增重(ADG)显著提高,料重比(F/G)显著降低(P<0.05),42日龄时欧洲效益指数显著增加(P<0.05);2.AL+COL组和COL组在21日龄和42日龄乳酸菌数量显著升高,沙门氏菌数量显著降低(P<0.05),COL组21日龄沙门氏菌数量显著低于其他各组(P<0.05),AL+COL组21日龄沙门氏菌数量显著高于COL组(P<0.05);3.AL+COL和COL组十二指肠、空肠的绒毛长度、绒隐比显著增加(P<0.05),AL+COL组十二指肠、空肠的隐窝深度显著低于COL组(P<0.05),回肠的绒毛长显著高于COL组(P<0.05),绒隐比显著低于COL组(P<0.05),十二指肠的绒隐比、回肠的隐窝深度差异不显著(P>0.05)。综上所述:在本试验条件下,饲粮中单独添加2‰COL及其与5 mg/kg AL联用都可以提高肉鸡的生产性能,改善肠道健康,促进肠道良性发育,且以两者联合使用效果更明显。

The purpose of this study was to investigate the effects of compound organic acidifiers and avilamycin on the production performance,intestinal microbiota and intestinal development of broilers at different stages.Group I was a blank control group fed basal diet.In the second group,10 mg/kg of avelamycin was added to the standard diet;GroupⅢwas supplemented with 2‰of compound organic acids and 5 mg/kg of avelamycin,and group IV was supplemented with 2‰of compound organic acids.The production performance,intestinal microbiota and intestinal development values of each experimental group were measured.The experimental results show that is at 21 days old and 42 days old,the average final weight and daily weight gain of experimental groupⅢand experimental group IV were significantly increased compared to experimental groupⅠand experimental groupⅡ,while the feed to weight ratio was significantly reduced(P<0.05).At 42 days old,the European benefit index significantly increased(P<0.05).However,there was no significant difference in daily weight gain and feed weight ratio between groupⅢand groupⅣin the experiment(P>0.05).1.The number of lactic acid bacteria in experimental groupsⅢandⅣwas significantly higher than that in experimental groupsⅠandⅡat 21 and 42 days of age,and the number of Salmonella was significantly lower than that in experimental groups I and II(P<0.05).The number of Salmonella in experimental group IV at 21 days of age was significantly lower than that in other groups(P<0.05),The number of Salmonella in groupⅢat 21 days of age was significantly higher than that in group IV(P<0.05),and there was no significant difference in other stages(P>0.05).2.The villous length and villous crypt ratio of the duodenum and jejunum in experimentⅢand IV groups were significantly higher than those in experimentⅠandⅡgroups(P<0.05).The crypt depth of the duodenum and jejunum in experimentⅢgroup was significantly lower than that in experiment IV group(P<0.05),and the villous length of the ileum was significantly higher than that in experiment IV group(P<0.05).The villous crypt ratio of the ileum was significantly lower than that in experimentⅣgroup(P<0.05),but the villous crypt ratio of the duodenum was There was no significant difference(P>0.05)in the depth of the ileal crypt compared to the experimental group IV.3.In summary,under the conditions of this experiment,the addition of 2‰of compound organic acids in the diet,or the combination with 5 mg/kg of avelamycin,could improve the production performance of broilers,improve the intestinal flora environment,and promote intestinal development,and the effect of adding 2‰of compound organic acids alone was more obvious.