Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Effects of Dietary Isoflavone and Casein Phosphopeptide on Hatching Egg Production and Eggshell Quality in Aged Egg-Type Breeder Hens

산란종계 사료 내 이소플라본 및 Casein Phosphopeptide의 첨가가 종란 생산성 및 후기 난각질에 미치는 영향

  • Published : 2006.10.31
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Abstract

This experiment was conducted to investigate the effects of dietary Ca levels and some feed additives such as isoflavone and casein phosphopeptide (CPP) on eggshell quality and hatching egg production in aged egg-type breeder hens. A total of three hundred and sixty, 56-week-old Hy-Line Brown breeder hens were divided into six groups and fed experimental diets of two levels of Ca (3.3% or 3.6%) either with addition of 0.2% isoflavone, 0.5% CPP or devoid of all for 5 weeks. There were no significant differences in laying performances and settable egg production among the groups. Significant increases (P<0.05) in eggshell strength were observed with increasing dietary Ca and addition of isoflavone, but not with addition of CPP. Fertility and hatchability were not influenced by dietary Ca and addition of isoflavone or CPP. The treatment had few significant effects on tibial proximal compositions and breaking strength. The concentrations of Ca, P, estrogen and calcitonin in serum were not affected by the dietary treatments. These results indicated that relatively high level of dietary Ca in combination with isoflavone had a beneficial effect on improving eggshell quality in aged egg-type breeder hens. But hatching egg production was not affected by dietary isoflavone or CPP.

본 실험은 산란종계 노계에서 이소플라본과 CPP의 첨가 급여가 종란 생산성 및 후기 난각질에 미치는 영향과 Ca 대사에 미치는 영향을 검토하기 위한 목적으로 실시하였다. 56주령의 Hy-Line Brown 산란종계 암탉 360수와 수탉 36수를 공시하여 사료 내 Ca을 3.3% 및 3.6% 수준으로 하고 이소플라본과 CPP를 각각 0.2% 및 0.5% 수준으로 첨가한 총 6개의 실험사료(3반복)를 5주간 급여하였다. 주별로 사료섭취량을 조사하였고, 산란율과 난중은 매일 조사하였다. 주별로 생산된 종란으로부터 종란율과 부화율을 조사하였다. 실험사료 급여 후 생산된 계란을 반복구별로 수집하여 난각질 및 난각막 내 glycosaminoglycan과 uronic acid 분석에 이용하였다. 실험 종료 시 반복구별로 평균체중이 비슷한 개체를 선발하여 채혈 후 희생시킨 다음 경골을 적출하였다. 채취한 경골은 화학적 조성의 분석을 위한 시료로 이용하였고, 얻어진 혈액에서 화학성분 및 호르몬 분석을 실시하였다.사료섭취량, 난생산성 및 종란율에서는 처리간에 유의한 차이가 없었다. 사료 내 Ca 수준 및 이소플라본 첨가는 난각강도를 각각 유의하게 개선시킨 것으로 나타났으며, CPP의 첨가에 의해서는 특별한 변화가 관찰되지 않았다. 수정율 및 부화율에서도 처리간에 유의한 차이는 없는 것으로 나타났다. 경골강도 및 경골 내 성분 조성에서 사료 내 Ca 수준 및 이소플라본과 CPP의 첨가 효과는 발견되지 않았다. 혈중 Ca, P, estrogen 및 calcitonin 농도 역시 처리간에 차이가 없는 것으로 나타났다. 본 실험에서는 사료 내 Ca 수준의 증가 및 이소플라본 같은 Ca의 이용성에 영향을 미치는 성분을 적절히 활용함으로서 후기 난각질의 개선을 통해 생산성을 향상시킬 수 있을 것으로 사료된다. 그러나 종란 생산성에 대해서는 이소플라본 및 CPP의 첨가가 크게 영향을 미치지 않았다.

Keywords

References

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