Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
권호 표지

Efficacy of Supplemental Microbial Phytase on Laying Performance and Phosphorus Utilization I. Effect of Microbial Phytase at Different Phosphorus Levels on Laying Performance and Phosphorus Utilization

산란 생산성과 인 이용성에 대한 Microbial Phytase의 첨가 효과 I. 무기태인 수준이 다른 사료에 Microbial Phytase 첨가가 산란상 및 인 이용성에 미치는 영향

  • 김상호 (축산기술연구소 대전지소) ;
  • 유동조 (축산기술연구소 대전지소) ;
  • 나재천 (축산기술연구소 대전지소) ;
  • 최철환 (축산기술연구소 대전지소) ;
  • 상병돈 (축산기술연구소 대전지소) ;
  • 이상진 (축산기술연구소 대전지소) ;
  • 이원준 (대성미생물연구소) ;
  • 류경선 (전북대학교 동물자원과학과)
  • Published : 2000.04.01
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Abstract

The effects of microbial phutase on laying performance and phosphorus utilization were examined at different levels of dietary nonphosphorus(NPP) in 320 23-week-old Hy-line brown hens for 12weeks. Diets were formulated 0.275%(T1), 0.220%(T2), 0.165%(T3) of NPP levels, and supplemental microbial phytase was 300DPU/kg diet constantly. Conventional diet(C) was formulated 0.275% NPP level without microbial phytase. Egg production and egg mass were higher in T2 than the others (p<0.05), and average egg weight was higher in T1 than the other (p<0.05). Egg productivity was tended to increase with supplemental phytase compared to conventional diet. Daily feed intake a hen also increased in T2 (p<0.05). Feed conversion ratio was improved slightly without significant difference. Eggshell breaking strength and thickness were not different significantly among the treatments. Haugh unit and yolk color were also not different. Calcium and phosphorus retention in body increased in T2 (p<0.05), but dry matter and nitrogen retention were not different significantly. Differences in nitrogen and calcium excretions were not found among the treatments. But phosphorus excretion decreased in order of dietary phosphorus levels with supplement phytase compared to C (p<0.05). Tibial ash, calcium and phosphorus were similar among the treatments. In conclusion, supplemental microbial phytase in laying diet may help to utilize phytase phosphorus, and could decrease NPP intake.

Keywords

References

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