Effects of Bacillus subtilis Supplementation on Egg Quality, Blood Characteristics and Fecal $NH_3-N$ in Laying Hens

산란계에 Bacillus subtilis의 급여가 계란 품질, 혈액 성상 및 분내 암모니아태 질소 함량에 미치는 영향

  • Kim H. J. (Department ol Animal Resource & Science, Dankook University) ;
  • Woo J. S. (Department ol Animal Resource & Science, Dankook University) ;
  • Kwon O. S. (Department ol Animal Resource & Science, Dankook University) ;
  • Min B. J. (Department ol Animal Resource & Science, Dankook University) ;
  • Shon K. S. (Department ol Animal Resource & Science, Dankook University) ;
  • Jo J. H. (Department ol Animal Resource & Science, Dankook University) ;
  • Chen Y. J. (Department ol Animal Resource & Science, Dankook University) ;
  • Kim I. H. (Department ol Animal Resource & Science, Dankook University)
  • 김해진 (단국대학교 동물자원학과) ;
  • 유종상 (단국대학교 동물자원학과) ;
  • 권오석 (단국대학교 동물자원학과) ;
  • 민병준 (단국대학교 동물자원학과) ;
  • 손경승 (단국대학교 동물자원학과) ;
  • 조진호 (단국대학교 동물자원학과) ;
  • 진영걸 (단국대학교 동물자원학과) ;
  • 김인호 (단국대학교 동물자원학과)
  • Published : 2005.03.01


This study was conducted to investigate the effects of Bacillus subtilis on the egg qualify, blood characteristics and fecal $NH_3-N$ in laying hens. A total of two hundred fifty two laying hens were randomly allocated into three treatments with seven replications for six weeks. Dietary treatments included 1) CON (control; basal diet), 2) BS0.2(control + $0.2\%$ Bacillus subtilis) and 3) BS0.4 (control +$0.4\%$ Bacillus subtilis). For overall Period, hen-day egg production tended to increase by the Bacillus subtilis $0.4\%$ in the diets, but was no significant difference. Egg weight, egg shell breaking strength, egg shell thickness, Haugh Unit, yolk color unit and egg yolk index were not affected by treatments. Difference of egg weight and egg shell breaking strength in the BS0.2 treatment tended to increase without significant difference. Difference of egg yolk index in laying hens fed Bacillus subtilis was increased (P<0.05). The concentrations of red blood cell (RBC) and white blood cell (WBC) were not significant difference. $NH_3-N$ concentration in feces with BS0.4 treatment was significantly (P<0.05) lower than control. In conclusion, dietary Bacillus subtilis could decrease fecal $NH_3-N$.


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