Effects of the Use of a Combination of Two Bacillus Species on Performance, Egg Quality, Small Intestinal Mucosal Morphology, and Cecal Microbiota Profile in Aging Laying Hens
文献类型： 外文期刊
作者： Yang, Jiajun 1 ; Zhan, Kai 1 ; Zhang, Minhong 2 ;
作者机构： 1.Anhui Acad Agr Sci, Inst Anim Husb & Vet Med, Anhui Prov Key Lab Livestock & Poultry Prod Safet, 40 Nongke South Rd, Hefei 230031, Anhui, Peoples R China
2.Chinese Acad Agr Sci, State Key Lab Anim Nutr, Inst Anim Sci, Yuanminyuan West Rd, Beijing 100094, Peoples R China
关键词： Bacillus; Aging laying hen; Performance; Egg quality; Intestinal bacterial composition
期刊名称：PROBIOTICS AND ANTIMICROBIAL PROTEINS （ 影响因子：4.609； 五年影响因子：4.585 ）
ISSN： 1867-1306
年卷期： 2020 年 12 卷 1 期
页码：
收录情况： SCI
摘要： Sixty-week-old Hy-Line brown laying hens were randomly divided into five groups and fed different diets over a period of 84 days. Experimental treatments included a basal diet (control); the basal diet supplemented with 1.0 x 10(6)B. licheniformis yb-214245; the basal diet supplemented with 1.0 x 10(6)B. subtilis yb-114246; a combination of both strains in a 2:1 ratio (6.6 x 10(5):3.3 x 10(5)B. licheniformis yb-214245:B. subtilis yb-114246); and the latter, added with 5 mg/kg flavomycin. Basal diet supplementation with the combined Bacillus species improved egg-laying performance in aging hens significantly (P < 0.05). Eggshell strength improved significantly with this treatment, compared to the control or the antibiotic-supplemented groups (P < 0.05). The levels of total cholesterol, triglycerides, and very low-density lipoprotein cholesterol in egg yolk declined significantly more in the Bacillus-treated group than in the control or the antibiotic-supplemented groups (P < 0.01). Small intestinal morphology was better in the hens treated with the Bacillus combination than in the hens in the control group (P < 0.05). The total number of aerobic bacteria (Bacillus, Lactobacillus, and Bifidobacterium) in the cecum was significantly higher in all the Bacillus-supplemented hens than either in the control or the antibiotic-supplemented hens (P < 0.01); additionally, the number of E. coli and Salmonella was significantly lower than in the control group (P < 0.01). In conclusion, diet supplementation with the combination of Bacillus species used here for aging laying hens improved their growth performance, cecal bacterial composition, egg quality, and small intestine morphology.
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