Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Growth Performance and Carcass Yield of Heavy Female Broiler at Different Stocking Densities

다양한 사육 밀도에서 대형 육계 암컷의 생산성과 도체 수율

  • Na, Jae-Cheon (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Choo, Hyo-Jun (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Kim, Dong-Woon (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • HwangBo, Jong (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Kim, Ji-Hyuk (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Kang, Hwan-Gu (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Kim, Min-Ji (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Choi, Hee-Cheol (Poultry Science Division, National Institute of Animal Science, RDA) ;
  • Hong, Eui-Chul (Poultry Science Division, National Institute of Animal Science, RDA)
  • 나재천 (농촌진흥청 국립축산과학원 가금과) ;
  • 추효준 (농촌진흥청 국립축산과학원 가금과) ;
  • 김동운 (농촌진흥청 국립축산과학원 가금과) ;
  • 황보종 (농촌진흥청 국립축산과학원 가금과) ;
  • 김지혁 (농촌진흥청 국립축산과학원 가금과) ;
  • 강환구 (농촌진흥청 국립축산과학원 가금과) ;
  • 김민지 (농촌진흥청 국립축산과학원 가금과) ;
  • 최희철 (농촌진흥청 국립축산과학원 가금과) ;
  • 홍의철 (농촌진흥청 국립축산과학원 가금과)
  • Received : 2013.01.31
  • Accepted : 2013.03.15
  • Published : 2013.03.31
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Abstract

This work was carried out to investigate performance and carcass yield of large-type broiler females at different stocking densities. Chicks (n = 492; 1-day-old; female; Arbor Acre broiler) were reared for six weeks (starter, 0~1 wk; earlier, 1~3 wk; finisher, 3~6 wk) and randomly divided into 3 treatments (4 replications/treatment, 36, 41 or 46 birds/replication). Treatments were T1 (10.9 birds/$m^2$), T2 (12.4 birds/$m^2$) and T3 (13.9 birds/$m^2$) by the stocking densities. Research indexes were livability, body weight, body weight gain, feed intake, feed conversion ratio, production efficiency factor, carcass yield and primal cuts ratio (wing, leg, back, breast and neck). Livability (%) was 90% or more for all treatments, but there was no significant difference on weekly livability (%). Body weight of T3 treatment were the lowest at 3 wk and body weight gain, feed intake, and feed conversion ratio were the lowest at 2~3 wk (P<0.05). Production efficiency factors of T1, T2 and T3 were 331.0, 340.8 and 336.0, respectively, and there was no significant difference among treatments. Leg meat ratio of T2 treatment was higher compared to other treatments at the age of 4 wk (P<0.05). Carcass yield of T1 treatment was the highest as 76.2% at the age of 5 wk (P<0.05). However, there was no significant difference on carcass ratio and partial meat ratio among treatments at the age of 6 wk. This result may provide the standard data of different stocking densities for heavy female broilers.

본 시험은 세 가지 다른 사육 밀도가 대형 육계 암컷의 생산성과 도체 수율에 미치는 영향을 조사하기 위해 수행하였다. 처리구는 사육 밀도에 따라 T1(10.9 수/$m^2$), T2(12.4 수/$m^2$) 및 T3(13.9 수/$m^2$)로 하였다. 공시계는 1일령 Arbor Acre종 육계 암컷 492수를 선별하여 처리구당 4반복씩, 반복당 각각 36, 41 및 46수씩 나누어 완전임의 배치하였으며, 육계 초기(0~1주), 전기(1~3주) 및 후기(3~6주)로 나누어 총 6주 동안 사양시험을 실시하였다. 조사 항목으로 생존율, 체중, 증체량, 사료 섭취량, 사료 요구율, 생산지수, 도체 수율 그리고 부분육 비율(날개, 다리, 가슴, 등, 목)을 조사하였다. 6주 동안의 육성률은 세 처리구 모두 90% 이상으로 높게 나타났으며, 처리구 간 차이가 없었다. 육계의 체중은 3주령, 증체량, 사료 섭취량 및 사료 요구율은 2~3주령에 T3 처리구에서 가장 낮았으며(P<0.05), T1과 T2 처리구 사이에 서는 유의차가 없었다(P>0.05). T1, T2 및 T3 처리구의 생산지수는 각각 331.0, 340.8, 336.0으로 처리구 사이에 유의적인 차이는 발견되지 않았다. 4주령 육계의 도체 수율과 대부분의 부분육(날개, 가슴, 등, 목) 비율은 처리구 간 차이가 없었으나, 다리 부위의 비율은 T2에서 가장 높았다(P<0.05). 5주령 육계의 도체 수율은 T1처리구에서 76.2%로 가장 높았으나(P<0.05), 부분육 비율은 처리구 간 유의차가 없었다. 6주령 육계의 도체 수율과 부분육 비율은 처리구 간 차이가 없었다. 본 시험은 대형 육계 암컷을 위한 다양한 사육 밀도를 기초자료로 제공하였으며, 추가적인 연구가 필요하다고 사료된다.

Keywords

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