摘要
通过对41株产酸芽孢杆菌Bacillus培养物的HPLC分析及抑菌活性和芽孢形成检测,筛选出3株能产生乳酸、有抑菌活性、易形成芽孢的乳酸芽孢杆菌.通过形态染色特性观察、Biolog系统鉴定及16S rDNA碱基序列分析,初步鉴定3株菌为芽孢杆菌SCBacillus sp.SC、芽孢杆菌TRB.sp.TR和蜡状芽孢杆菌SL1 B.cereusstrain SL1.动物饲养试验显示,乳酸芽孢杆菌益生素能提高三黄鸡血清钙、磷、总蛋白、球蛋白、溶菌酶、IgG、IgA含量及脾脏、胸腺和法氏囊指数;饲料中添加5 g/kg的乳酸芽孢杆菌益生素,可使56日龄三黄鸡的平均日增质量提高13.61%,料质量比降低18.37%.
The culture of 41 Bacillus strains producing acid was analysed by detection of HPLC,bacteriostatic activity and sporulation. Three lactic acid Bacillus strains producing lactic acid, antibacterial sub- stance and spore were identified. According to the morphological characteristics, staining property, Biolog systematic identification and 16S rDNA sequence analysis,three strains were identified as Bacillus sp. SC, B. sp. TR and B. cereus strain SL1. Animal feeding trials showed that lactic acid Bacillus pro biotics could increase content of calcium,phosphorus,total protein,globulin,lysozyme, IgG,IgA in serum of three buff chickens, and idexes of spleen,thymus, bursa of three buff chickens. To 56 day-old three buff chickens,5 g/kg probiotics in feedingstuff could raise average daily gain to 13.61% ,reduce feed to gain ratio to 18.37%.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2010年第2期117-120,共4页
Journal of South China Agricultural University
基金
广东省科技计划项目(2006B20301023)
关键词
乳酸芽孢杆菌
筛选
鉴定
应用试验
三黄鸡
lactic acid Bacillus
screening
identification
application test
three buff chickens
