Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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The Effects of Dietary Protein Level on Laying Performance and Egg Quality in Japanese Quail

메추리에 있어서 산란 사료 내 단백질 수준이 산란 성적과 난질에 미치는 영향

  • Oh, Sung-Taek (College of Animal Bioscience and Technology, Konkuk University) ;
  • Kim, Je-Hun (College of Animal Bioscience and Technology, Konkuk University) ;
  • Park, Seung-Jae (College of Animal Bioscience and Technology, Konkuk University) ;
  • Yun, Jeong-Geun (College of Animal Bioscience and Technology, Konkuk University) ;
  • Zheng, Lan (College of Animal Bioscience and Technology, Konkuk University) ;
  • An, Byoung-Ki (College of Animal Bioscience and Technology, Konkuk University) ;
  • Kang, Chang-Won (College of Animal Bioscience and Technology, Konkuk University)
  • 오성택 (건국대학교 동물생명과학대학) ;
  • 김제헌 (건국대학교 동물생명과학대학) ;
  • 박승재 (건국대학교 동물생명과학대학) ;
  • 윤정근 (건국대학교 동물생명과학대학) ;
  • 정란 (건국대학교 동물생명과학대학) ;
  • 안병기 (건국대학교 동물생명과학대학) ;
  • 강창원 (건국대학교 동물생명과학대학)
  • Received : 2012.07.11
  • Accepted : 2012.09.06
  • Published : 2012.09.30
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Abstract

This experiment was conducted to investigate the effects of various levels of dietary protein on laying performance and egg quality in laying quail. A total of six hundred forty 7-week-old laying type Japanese quail were divided into four groups with eight replicates per group (20 birds per replicate) and fed four diets differing in dietary protein levels (18, 20, 22 and 24%) with isocaloric corn-soybean meal-based diets for 8 weeks. The results showed no significant differences in feed intake and egg weight among the groups. With an increase in dietary protein levels, the egg production and daily egg mass were linearly increased (P<0.05). However, there were no significant differences in eggshell thickness and Haugh unit. The dietary protein did not affect the blood levels of GOT, GPT, BUN, albumin, and creatinine. The ammonia concentration of intestinal digesta was not affected by the dietary treatments. The contents of hepatic triacylglycerol in the groups fed diets containing 20% protein or more were significantly reduced as compared with that of 18% CP group (P<0.05). Overall, this study showed that relatively high levels of dietary CP are needed to sustain the higher egg production and daily egg mass and to avoid the hepatic triacylglycerol accumulation in Japanese quail.

본 연구는 산란 메추리에서 사료 내 조단백질 수준이 생산성과 난질에 미치는 영향을 조사하기 위하여 실시하였다. 총 640수의 7주령 메추리(Coturnix coturnix japonica)를 공시하여 모두 4개 처리구에 8반복(반복당 20수)으로 임의 배치하여 8주간 사양실험을 실시하였으며, 실험 사료는 옥수수 대두박을 기초로 하여 대사 에너지 2,800 kcal/kg에 조단백질 수준을 18%, 20%, 22% 및 24%로 각각 달리하여 급여하였다. 전체 실험기간의 수당 사료 섭취량과 난중에서는 처리간에 유의성 있는 차이가 관찰되지 않았다. CP 24% 처리구의 산란율과 일산란량은 CP 18% 처리구에 비해 유의하게 높았다(P<0.05). 난각 두께 및 Haugh unit 항목에서는 유의적인 차이를 보이지 않았다. 혈청 내 albumin, BUN, creatinine 농도 및 GOT, GPT의 효소 활성 농도는 처리구간에 유의적인 차이가 나타나지 않았다. 맹장 내 암모니아 농도는 처리구 간에 변화가 관찰되지 않았으며, 간 내 중성지질 함량은 CP 18% 처리구에 비해 20%이상 급여한 모든 처리구에서 유의하게 감소하였다(P<0.05). 본 실험 결과, 난용메추리 사료 내 조단백질 함량이 상대적으로 높은 조건에서 난생산성이 증가하였으며, 간 내 중성지질 축적이 감소한 것으로 나타났다. 또한 단백질 수준의 범위를 더 넓히고 세분화된 연구가 더 필요하리라 판단된다.

Keywords

References

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