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当前位置: 首页 > 文章 > 抗菌肽天蚕素对鸡生长性能、肠道黏膜形态、盲肠菌群及免疫功能的影响 江苏农业学报 2014,30 (2) 331-338
Position: Home > Articles > Effect of antibacterial peptide cecropin on growth performance,intestinal mucosal morphology,caecal microflora and immune function of chickens Jiangsu Journal of Agricultural Sciences 2014,30 (2) 331-338

抗菌肽天蚕素对鸡生长性能、肠道黏膜形态、盲肠菌群及免疫功能的影响

作  者：
姚远;匡伟;黄忠阳;郗正林;王冰心;何宗亮;王润之
单  位：
南京市畜牧家禽科学研究所
关键词：
天蚕素;鸡;生长性能;肠道黏膜形态;盲肠菌群;血液免疫指标
摘  要：
为了研究抗菌肽天蚕素对鸡生长性能、肠道黏膜形态、盲肠主要菌群以及血液免疫指标的影响,选取1日龄体质量相近的固始鸡450羽,随机分为5组,对照组饲喂基础日粮,试验组饲喂分别添加了500 mg/kg抗生素以及100 mg/kg、200 mg/kg、500 mg/kg天蚕素的日粮,试验期为60 d。结果显示,日粮中添加200 mg/kg天蚕素可显著提高1~21日龄鸡平均日增质量、降低料质量比(P<0.05);日粮中添加200~500 mg/kg天蚕素能显著增加鸡十二指肠、空肠、盲肠的黏膜厚度和绒毛长度/隐窝深度比值(V/C值)(P<0.05);添加500 mg/kg天蚕素能够有效地减少鸡肠道中大肠杆菌和沙门氏菌数量,同时又提高乳酸菌数量,并可显著增加鸡血清IgA、IgG、IgM含量(P<0.05),添加200~500 mg/kg天蚕素可显著增加血清补体4(C4)含量(P<0.05)。由此可见,日粮中适量添加天蚕素可以提高鸡的生长性能,改善鸡肠道黏膜形态,抑制肠道有害菌的增殖并刺激有益菌的增殖,同时还能提高机体的免疫功能。
译  名：
Effect of antibacterial peptide cecropin on growth performance,intestinal mucosal morphology,caecal microflora and immune function of chickens
作  者：
YAO Yuan;KUANG Wei;HUANG Zhong-yang;XI Zheng-lin;WANG Bing-xin;HE Zong-liang;WANG Run-zhi;Nanjing Institute of Animal Husbandry and Poultry Science;
关键词：
cecropin;;chicken;;growth performance;;intestinal mucosal morphology;;caecal microflora;;hemaimmune
摘  要：
This experiment was conducted to evaluate the effects of cecropin on growth performance,intestinal mucosal morphology,caecal microflora and hemaimmune function of chickens. A total of 450 one-year-old Gushi chickens with similar body weights were randomly allocated into 5 groups. The chickens in control group were fed on a basal diet,while those in experimental groups were fed on basal diet supplemented with 500 mg / kg antibiotics and 100 mg / kg,200 mg / kg,500 mg / kg cecropin,respectively. The experiment lasted for 60 d. The results were showed as follows. The basal diet supplemented with 200 mg / kg cecropin significantly increased average daily weight gain and decreased feed conversion rate of chickens aged 1- 21 d( P < 0. 05). 200- 500 mg / kg cecropin significantly increased the mucosal thickness and the villus height to crypt depth ratio of duodenum,jejunum and caecum( P < 0. 05). The basal diet supplemented with500 mg / kg antimicrobial peptides significantly reduced the number of Escherichia. coli and Salmonella in caecum,increased the number of Lactobacillus,and boosted the contents of immune globulin A,immune globulin G and immune globulin M in serum( P < 0. 05). The basal diet supplemented with 200- 500 mg / kg antimicrobial peptides significantly improved the contents of complement 4( C4) in serum( P <0. 05). In conclusion,supplementation of cecropin could improve the growth performance and intestinal mucosal morphology,inhibit the proliferation of deleterious bacteria,stimulate the proliferation of beneficial bacteria,and improve the immune function of chickens.

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