Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effects of Stocking Density on Performance and Blood Characteristics of Broiler in Summer

혹서기 사육 밀도가 육계의 생산성 및 혈액 성상에 미치는 영향

  • Yu, D.J. (Poultry Science Division, National Institute of Animal Science) ;
  • Na, J.C. (Poultry Science Division, National Institute of Animal Science) ;
  • Jang, B.G. (Poultry Science Division, National Institute of Animal Science) ;
  • Lee, D.S. (Poultry Science Division, National Institute of Animal Science) ;
  • Kim, S.H. (Poultry Science Division, National Institute of Animal Science) ;
  • Kim, J.H. (Poultry Science Division, National Institute of Animal Science) ;
  • Kang, K.H. (Poultry Science Division, National Institute of Animal Science) ;
  • Kang, H.G. (Poultry Science Division, National Institute of Animal Science) ;
  • Suh, O.S. (Poultry Science Division, National Institute of Animal Science) ;
  • Kang, H.S. (Poultry Science Division, National Institute of Animal Science)
  • 유동조 (축산과학원 축산자원개발부 가금과) ;
  • 나재천 (축산과학원 축산자원개발부 가금과) ;
  • 장병귀 (축산과학원 축산자원개발부 가금과) ;
  • 이덕수 (축산과학원 축산자원개발부 가금과) ;
  • 김상호 (축산과학원 축산자원개발부 가금과) ;
  • 김지혁 (축산과학원 축산자원개발부 가금과) ;
  • 강근호 (축산과학원 축산자원개발부 가금과) ;
  • 강환구 (축산과학원 축산자원개발부 가금과) ;
  • 서옥석 (축산과학원 축산자원개발부 가금과) ;
  • 강희설 (축산과학원 축산자원개발부 가금과)
  • Published : 2007.06.30
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Abstract

This experiment was conducted to investigate the effects of stocking density on performance and blood characteristics of broiler chicken in summer. One day-old 648 male commercial broiler chicks(Ross strain) were divided into 3 groups with 4 replicates(12 pens), 41 to 69 birds per pen, to compare the stocking density difference on growth performance and blood characteristics. Birds in T1, T2 and T3 were reared in different size 0.050, 0.066, 0.083 $m^2$/bird floor, respectively. The birds were fed the same experimental diet ad libitum for 5 weeks. Chickens were weekly weighed and one bird was selected from each pen to measure blood characteristics at the end of experiment. Body weight and feed intake increased significantly in low density treatment(T3) compare to that of high density treatment(P<0.05). Feed conversion was significantly improved in customary treatment(T2) relative to that of other treatments(P<0.05). No significant difference was observed in moisture contents of bedding among treatments. In blood characteristics, low density treatment(T3) decreased the total protein, cholesterol and albumin, but were no significant difference. From the result of this study, it could be concluded that the higher stocking density might give more stress to the birds from physical stimuli and thus were harmful environment causing lower productions compared to the lower ones

본 연구는 육계의 개방 계사에서 사육 밀도에 따라 고밀도(0.050$m^2$/수), 관행(0.066$m^2$/수), 저밀도(0.083$m^2$/수) 사육구로 구분하여 사육 밀도가 여름철 육계 생산성에 미치는 영향을 평가하고자 실시하였다. 공시계는 육계 초생추 Ross로서 684수를 이용하였으며, 5주간 사양 시험을 실시하였다. 기초 사료 영양소 함량은 사육 전기($0{\sim}3$주)에 ME 3,100 kcal/kg, CP 22.0%, 후기($4{\sim}5$주)에는 각각 3,100 kcal/kg, 20.0%로 하였다. 사육 밀도에 의한 육계의 체중은 5주령에 고밀도 처리구인 T1이 관행적인 T2와 저밀도구인 T3 처리구에 비해 유의적으로(P<0.05) 감소하였다. 사료 섭취량도 체중의 변화와 동일한 결과를 보였다. 사료 요구율은 관행적인 T2 처리구에서 유의적으로(P<0.05) 개선되었다. 음수 섭취량과 깔짚 수분 함수율은 시험 전 기간동안 처리구간에 통계적인 차이가 없었다. 혈청 성분의 분석결과에서는 total protein, cholesterol 및 albumin의 수치가 T3에서 낮은 경향이었으나 유의성은 인정되지 않았다. 본 연구 결과 육계의 사육 밀도 증가는 생산성을 감소시키며 개체에 스트레스를 증가시켜 폐사율의 증가와 도체 품질을 저하시킬 수 있는 가능성을 시사하였다.

Keywords

References

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