Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Concurrent Bioassay of Energy and Protein Utilization of Protein Sources in Layer Diets

채란계 단백질 급원의 단백질과 에너지 이용성의 동시 생물검정

  • 고태송 (건국대학교 축산대학 사료영양학과) ;
  • 주양돈 (건국대학교 축산대학 사료영양학과) ;
  • 우경목 (건국대학교 축산대학 사료영양학) ;
  • 최철림 (건국대학교 축산대학 사료영양학과) ;
  • 박병석 (건국대학교 축산대학 사료영양학과)
  • Published : 1994.06.01
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Abstract

A study of concurrent bioassay for protein quality and energy level in protein sources was rnade by determining urinary nitrogenous compounds in excreta. The carry over effect of previous feeding was eliminated by 48 h of feeding the experimental diets prior to the determination of for protein digestibility and utilizability, and energy digestibility and metabolizability at 24 h interval during 3 days. Then, protein qualities and energy levels for soybean meal, rapeseed meal and fish meal were calculated by a substitution method. Apparent protein utilization (NB/NI) was affected by the increased fecal nitrogen excretion in soybean meal and by the increased urinary nitrogen excretion in rapeseed meal and fish meal. The apparent metabolizability of energy (ME/GE) was affected by the fecal energy excretion in soybean meal and rapeseed meal and by urinary energy excretion in fishmeal. The results indicated that the concurrent bioassay of protein quality and energy levels in ingredients appears to be applicable to chickens of other age, sex, breeds and environmental conditions.

Keywords

References

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